计算器安卓源代码

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计算器Android版(源码)

计算器Android版(源码)100%运行通过这是自己编写的，通过eclipse运行简易计算器Android版（源码）这是自己整理得，欢迎大家下载说明：每完成一次计算后，需先clear 清除记忆，当然也可以连算XML布局<?xml version="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"><TableLayoutandroid:id="@+id/tableLayout1"android:layout_width="match_parent"android:layout_height="wrap_content"android:collapseColumns="4"><TableRowandroid:id="@+id/tableRow_et"android:layout_width="fill_parent"android:layout_height="fill_parent"><EditTextandroid:id="@+id/et"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="4"android:focusable="false"android:singleLine="true"android:inputType="text"android:gravity="right"></EditText></TableRow><TableRowandroid:id="@+id/tableRow1"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_7"android:layout_width="40px"android:layout_height="40px"android:text="7"/><Buttonandroid:id="@+id/bt_8"android:layout_width="40px"android:layout_height="40px"android:text="8"/><Buttonandroid:id="@+id/bt_9"android:layout_width="40px"android:layout_height="40px"android:text="9"/><Buttonandroid:id="@+id/bt_back"android:layout_width="40px"android:layout_height="40px"android:text="back"/></TableRow><TableRowandroid:id="@+id/tableRow2"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_4"android:layout_width="40px"android:layout_height="40px"android:text="4"/><Buttonandroid:id="@+id/bt_5"android:layout_width="40px"android:layout_height="40px"android:text="5"/><Buttonandroid:id="@+id/bt_6"android:layout_width="40px"android:layout_height="40px"android:text="6"/><Buttonandroid:id="@+id/bt_divide"android:layout_width="40px"android:layout_height="40px"android:text="/"/></TableRow><TableRowandroid:id="@+id/tableRow3"android:layout_width="fill_parent"android:layout_height="fill_parent">android:layout_width="50px"android:layout_height="40px"android:text="+"/><Buttonandroid:id="@+id/bt_sub"android:layout_width="50px"android:layout_height="40px"android:text="-"/></TableRow><TableRowandroid:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_equal"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="3"android:text="="/><Buttonandroid:id="@+id/bt_clear"android:layout_width="50px"android:layout_height="40px"android:text="clear"/></TableRow></TableLayout></LinearLayout>源代码：package android.sdk;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class Android_calculatorActivity extends Activity{private Button bt_1;private Button bt_2;private Button bt_3;private Button bt_4;private Button bt_5;private Button bt_6;private Button bt_7;private Button bt_8;private Button bt_9;private Button bt_0;private Button bt_add;private Button bt_sub; // 减private Button bt_multiply; // 乘private Button bt_divide; // 除private Button bt_back;private Button bt_equal; // 等于private Button bt_point; // 点private Button bt_clear; // 清除private EditText et_play; // 显示private String str_oper = "+"; // 运算符private StringBuffer str_display = new StringBuffer();; // 显示private String str_result; // 结果显示private double num1;private double num2;private boolean flag = true; // 小数点个数开关控制；private boolean b_sub, b_mul, b_div; // 运算符开关控制@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(yout.main);bt_0 = (Button) findViewById(R.id.bt_0);bt_1 = (Button) findViewById(R.id.bt_1);bt_2 = (Button) findViewById(R.id.bt_2);bt_3 = (Button) findViewById(R.id.bt_3);bt_4 = (Button) findViewById(R.id.bt_4);bt_5 = (Button) findViewById(R.id.bt_5);bt_6 = (Button) findViewById(R.id.bt_6);bt_7 = (Button) findViewById(R.id.bt_7);bt_8 = (Button) findViewById(R.id.bt_8);bt_9 = (Button) findViewById(R.id.bt_9);bt_add = (Button) findViewById(R.id.bt_add);bt_sub = (Button) findViewById(R.id.bt_sub);bt_multiply = (Button) findViewById(R.id.bt_multiply); bt_divide = (Button) findViewById(R.id.bt_divide);bt_back = (Button) findViewById(R.id.bt_back);bt_equal = (Button) findViewById(R.id.bt_equal);bt_point = (Button) findViewById(R.id.bt_point);bt_clear = (Button) findViewById(R.id.bt_clear);et_play = (EditText) findViewById(R.id.et);et_play.setText("0.0");bt_0.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("0");et_play.setText(str_display.toString());}});bt_1.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("1");et_play.setText(str_display.toString());}});bt_2.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("2");et_play.setText(str_display.toString());}});bt_3.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("3");et_play.setText(str_display.toString());}});bt_4.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("4");et_play.setText(str_display.toString());}});bt_5.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("5");et_play.setText(str_display.toString());}});bt_6.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("6");et_play.setText(str_display.toString());}});bt_7.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("7");et_play.setText(str_display.toString());}});bt_8.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("8");et_play.setText(str_display.toString());}});bt_9.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("9");et_play.setText(str_display.toString());}});bt_point.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){if (flag){str_display.append(".");flag = false;}}});bt_back.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_display.length() != 0){str_display.deleteCharAt(str_display.length() - 1);et_play.setText(str_display.toString());}}});bt_add.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";if (!(str_display.toString() == "")){num1 += Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));flag = true;}});bt_sub.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "-";if (!b_sub && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_sub = true;} else{if (!(str_display.toString() == "")){num1 -=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_multiply.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "*";if (!b_mul && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_mul = true;} else{if (!(str_display.toString() == "")){num1 *=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_divide.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "/";if (!b_div && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_div = true;} else{if (!(str_display.toString() == "")){if(Double.parseDouble(str_display.toString()) == 0){Toast.makeText(Android_calculatorActivity.this,"除数不能为0！",Toast.LENGTH_LONG).show();} else{num1 /=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_clear.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";str_display = new StringBuffer("");str_result = null;num1 = 0;num2 = 0;flag = true;b_sub = false;b_mul = false;b_div = false;et_play.setText("0.0");}});bt_equal.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_oper.equals("+")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 + num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("-")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 - num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("*")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 * num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("/")){num2 = Double.parseDouble(str_display.toString());if (!(num2 == 0)){str_result = String.valueOf((num1 / num2));et_play.setText(str_result);} else{Toast.makeText(Android_calculatorActivity.this,"除数不能为0！", Toast.LENGTH_LONG).show();}str_display = new StringBuffer("");}}});}。

android简单计算器代码

android简单计算器代码————————————————————————————————作者：————————————————————————————————日期：2package hua.xing.demo；import android。

app。

Activity;import android。

os。

Bundle;import android.view。

View；import android.view.View.OnClickListener;import android。

widget.Button;import android.widget。

EditText;public class CalculatordemoActivity extends Activity implements OnClickListener { /** Called when the activity is first created。

＊/private Button but0 = null；private Button but1 = null;private Button but2 = null；private Button but3 = null；private Button but4 = null;private Button but5 = null;private Button but6 = null；private Button but7 = null；private Button but8 = null;private Button but9 = null；private Button dim = null;private Button add = null；private Button sub = null;private Button mult = null;private Button div = null；private Button equ = null；private EditText etext = null;private double value = 0；private String str1 = null;private String tem = ””;private String sign = ”a"；＠Overridepublic void onCreate（Bundle savedInstanceState）{ super。

Android计算器编写代码

Android计算器编写代码其实这个安卓计算机，所有的后台思想与《》是⼀模⼀样的。

Win窗体程序移植到安卓，从C#到Java其实很简单的，因为两者的基本语法都很相像，唯⼀的难点是安卓的xml布局部分，不像C#窗体能够直接拖。

还是如下图⼀个能够完成基本四则运算的计算器：先在res\values\strings.xml设置按钮相应的字体，以免布局⽂件警告满天飞：<?xml version="1.0" encoding="utf-8"?><resources><string name="app_name">计算器</string><string name="bt_1">1</string><string name="bt_2">2</string><string name="bt_3">3</string><string name="bt_4">4</string><string name="bt_5">5</string><string name="bt_6">6</string><string name="bt_7">7</string><string name="bt_8">8</string><string name="bt_9">9</string><string name="bt_0">0</string><string name="bt_point">.</string><string name="bt_ce">CE</string><string name="bt_plus">+</string><string name="bt_minus">-</string><string name="bt_multi">×</string><string name="bt_div">÷</string><string name="bt_result">=</string></resources>之后，布局部分采⽤了《【Android】关于百分⽐布局多个LinearLayout嵌套时出现的问题与解决⽅案》（点击打开链接）的思想，具体如下图，⼀个TextView、⼀个EditText，皆直接⽤match_parent占据整⾏的宽度，之后利⽤LinearLayout与TableLayout作横向⽐例的划分。

Android计算器代码编写

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="/res/android" android:padding="10px"android:layout_width="wrap_content"android:layout_height="wrap_content"><TextViewandroid:id="@+id/label"android:layout_width="fill_parent"android:layout_height="wrap_content" android:text="@string/hello"/><EditTextandroid:id="@+id/factor1"android:layout_height="wrap_content" android:layout_width="fill_parent"android:layout_below="@id/label"android:layout_margin="5px"></EditText><Buttonandroid:id="@+id/dig1"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/factor1"android:text="1"android:textSize="30px"/><Buttonandroid:id="@+id/dig2"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/factor1"android:layout_toRightOf="@id/dig1"android:text="2"android:textSize="30px"/><Buttonandroid:id="@+id/dig3"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/factor1"android:layout_toRightOf="@id/dig2" android:text="3"android:textSize="30px"/><Buttonandroid:id="@+id/dig4"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig1" android:text="4"android:textSize="30px"/><Buttonandroid:id="@+id/dig5"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig1" android:layout_toRightOf="@id/dig4" android:text="5"android:textSize="30px"/><Buttonandroid:id="@+id/dig6"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig1" android:layout_toRightOf="@id/dig5" android:text="6"android:textSize="30px"/><Buttonandroid:id="@+id/dig7"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig4" android:text="7"android:textSize="30px"/><Buttonandroid:id="@+id/dig8"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig4" android:layout_toRightOf="@id/dig7"android:text="8"android:textSize="30px"/><Buttonandroid:id="@+id/dig9"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig4" android:layout_toRightOf="@id/dig8" android:text="9"android:textSize="30px"/><Buttonandroid:id="@+id/dig0"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/dig4" android:layout_toRightOf="@id/dig9" android:text="0"android:textSize="30px"/><Buttonandroid:id="@+id/add"android:layout_width="50px"android:layout_height="wrap_content" android:layout_below="@id/factor1" android:layout_toRightOf="@id/dig3" android:textSize="30px"android:text="@string/add"android:gravity="center"/><Buttonandroid:id="@+id/sub"android:layout_width="50px"android:layout_height="wrap_content" android:layout_toRightOf="@id/add" android:layout_alignTop="@id/add" android:textSize="30px"android:gravity="center"android:text="@string/sub"/><Buttonandroid:id="@+id/mult"android:layout_width="50px"。

从零开始学android实现计算器功能示例分享（计算器源码）

从零开始学android实现计算器功能⽰例分享（计算器源码）下⾯是效果展⽰：复制代码代码如下:<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content"><TextViewandroid:id="@+id/tvResult"android:layout_width="fill_parent"android:layout_height="wrap_content"android:height="50dp"android:text="@string/tvResult"/></LinearLayout><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content"><Buttonandroid:id="@+id/btnBackspace"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="150dp"android:layout_marginLeft="10dp"android:text="@string/btnbackspace"/><Buttonandroid:id="@+id/btnCE"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="150dp"android:text="@string/btnCE"/></LinearLayout><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content"><Buttonandroid:id="@+id/btn7"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:width="75dp"android:text="@string/btn7"/><Buttonandroid:id="@+id/btn8"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btn8"/><Buttonandroid:id="@+id/btnDiv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btnDiv"/></LinearLayout><LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content"><Buttonandroid:id="@+id/btn4"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:width="75dp"android:text="@string/btn4"/><Buttonandroid:id="@+id/btn5"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btn5"/><Buttonandroid:id="@+id/btn6"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btn6"/><Buttonandroid:id="@+id/btnMul"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btnMul"/></LinearLayout><LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content"><Buttonandroid:id="@+id/btn1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:width="75dp"android:text="@string/btn1"/><Buttonandroid:id="@+id/btn2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btn2"/><Buttonandroid:id="@+id/btn3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btn3"/></LinearLayout><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content"><Buttonandroid:id="@+id/btn0"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:width="75dp"android:text="@string/btn0"/><Buttonandroid:id="@+id/btnC"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btnC"/><Buttonandroid:id="@+id/btnEqu"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btnEqu"/><Buttonandroid:id="@+id/btnSub"android:layout_width="wrap_content"android:layout_height="wrap_content"android:width="75dp"android:text="@string/btnSub"/></LinearLayout></LinearLayout>复制代码代码如下:package com.example.week2;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.app.Activity;public class MainActivity extends Activity implements OnClickListener{ //声明⼀些控件Button btn0=null;Button btn1=null;Button btn2=null;Button btn3=null;Button btn4=null;Button btn5=null;Button btn6=null;Button btn7=null;Button btn8=null;Button btn9=null;Button btnBackspace=null;Button btnCE=null;Button btnMul=null;Button btnDiv=null;Button btnEqu=null;TextView tvResult=null;//声明两个参数。

Android计算器源码

计算器源码Java程序代码：package ymq.demo03;import android.app.Activity;import android.os.Bundle;import android.view.*;import android.widget.*;public class demo03 extends Activity {/** Called when the activity is first created. */String str="";EditText et;int c=0,flag=0;double b=0.0,g=0.0,f=0.0;View vi;public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stubmenu.add(0, 1, 1, "退出");return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stubif(item.getItemId()==1){finish();}return super.onOptionsItemSelected(item);}//计算方法public double calculater(){switch(c){case 0:f=g;break;case 1:f=b+g;break;case 2:f=b-g;break;case 3:f=b*g;break;case 4:f=b/g;break;}b=f;return f;}@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.main);//获得按键final Button number[]=new Button[10];final Button fuhao[]=new Button[11];fuhao[0]=(Button)findViewById(R.id.button01);fuhao[1]=(Button)findViewById(R.id.button02);fuhao[2]=(Button)findViewById(R.id.button03);fuhao[3]=(Button)findViewById(R.id.button04);fuhao[4]=(Button)findViewById(R.id.button05);fuhao[5]=(Button)findViewById(R.id.button06);fuhao[6]=(Button)findViewById(R.id.buttonce);fuhao[7]=(Button)findViewById(R.id.buttonc);fuhao[8]=(Button)findViewById(R.id.zheng);fuhao[9]=(Button)findViewById(R.id.kaifang);fuhao[10]=(Button)findViewById(R.id.pingfang);number[0]=(Button)findViewById(R.id.button0);number[1]=(Button)findViewById(R.id.button1);number[2]=(Button)findViewById(R.id.button2);number[3]=(Button)findViewById(R.id.button3);number[4]=(Button)findViewById(R.id.button4);number[5]=(Button)findViewById(R.id.button5);number[6]=(Button)findViewById(R.id.button6);number[7]=(Button)findViewById(R.id.button7);number[8]=(Button)findViewById(R.id.button8);number[9]=(Button)findViewById(R.id.button9);et=(EditText) findViewById(R.id.textView1);et.setText(str);fuhao[6].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubstr="";et.setText(str);vi=v;}});fuhao[7].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubb=0.0;c=0;g=0.0;str="";et.setText(str);}});fuhao[8].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(vi!=fuhao[5]&&str!=""){char ch=str.charAt(0);if(ch=='-')str=str.replace("-","");elsestr="-"+str;et.setText(str);}}});fuhao[9].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){double a=Double.parseDouble(str);str=Math.sqrt(a)+"";et.setText(str);});fuhao[10].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){double a=Double.parseDouble(str);str=""+a*a;et.setText(str);}}});//设定数字按键number[0].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=0;et.setText(str);flag=0;}else{char ch1[];ch1=str.toCharArray();if(!(ch1.length==1&&ch1[0]=='0')){str+=0;et.setText(str);}}vi=v;}});number[1].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=1;et.setText(str);flag=0;}else{str+=1;et.setText(str);}vi=v;}});number[2].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=2;et.setText(str);flag=0;}else{str+=2;et.setText(str);}vi=v;}});number[3].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=3;et.setText(str);flag=0;}else{str+=3;et.setText(str);}vi=v;}});number[4].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=4;et.setText(str);flag=0;}else{str+=4;et.setText(str);}vi=v;}});number[5].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=5;et.setText(str);flag=0;}else{str+=5;et.setText(str);}vi=v;}});number[6].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=6;et.setText(str);flag=0;}else{str+=6;et.setText(str);}vi=v;}});number[7].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=7;et.setText(str);flag=0;}else{str+=7;et.setText(str);}vi=v;}});number[8].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=8;et.setText(str);flag=0;}else{str+=8;et.setText(str);}vi=v;}});number[9].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(flag==1){str="";str+=9;et.setText(str);flag=0;}else{str+=9;et.setText(str);}vi=v;}});//设定符号键//加fuhao[0].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){c=1;}else{g=Double.parseDouble(str);calculater();str=""+f;et.setText(str);c=1;flag=1;}}}});//减fuhao[1].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){c=2;}else{g=Double.parseDouble(str);calculater();str=""+f;et.setText(str);c=2;flag=1;vi=v;}}}});//乘fuhao[2].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){c=3;}else{g=Double.parseDouble(str);calculater();str=""+f;et.setText(str);flag=1;vi=v;}}}});//除fuhao[3].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""){if(vi==fuhao[0]||vi==fuhao[1]||vi==fuhao[2]||vi==fuhao[3]){c=4;}else{g=Double.parseDouble(str);calculater();str=""+f;et.setText(str);c=4;flag=1;vi=v;}}}});//等号fuhao[4].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str!=""&&vi!=fuhao[0]&&vi!=fuhao[1]&&vi!=fuhao[2]&&vi!=fuhao[3 ]){g=Double.parseDouble(str);calculater();str=""+f;et.setText(str);flag=1;vi=v;}}});//小数点fuhao[5].setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// TODO Auto-generated method stubif(str==""){str+=".";et.setText(str);}else{char ch1[];int x=0;ch1=str.toCharArray();for(int i=0;i<ch1.length;i++)if(ch1[i]=='.')x++;if(x==0){str+=".";et.setText(str);}}}});}}布局文件：main.xml<?xml version="1.0"encoding="utf-8"?><LinearLayoutandroid:background="#ff808080"xmlns:android="/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"android:layout_gravity="center_vertical"android:id="@+id/zhengfu"><EditTextandroid:text="TextView"android:id="@+id/textView1"android:textSize="25sp"android:textColor="#000000"android:layout_gravity="center"android:gravity="left"android:cursorVisible="false"android:editable = "false"android:layout_height="wrap_content"android:layout_width="fill_parent"android:layout_marginLeft="4dip"android:layout_marginRight="4dip"android:layout_marginTop="4dip"android:layout_weight="1.5"></EditText><TableLayoutandroid:id="@+id/tablelayout"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_margin="4dip"android:layout_weight="10"><LinearLayoutandroid:id="@+id/linearlayout02"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"><Buttonandroid:layout_width="50dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:id="@+id/buttonc"android:text="@string/shan"></Button><Buttonandroid:layout_width="50dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:id="@+id/buttonce" android:text="@string/shanchu"></Button></LinearLayout><TableRowandroid:id="@+id/row0"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/one" android:id="@+id/button1"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/two" android:id="@+id/button2"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/three" android:id="@+id/button3"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/jia" android:id="@+id/button01"></Button></TableRow><TableRowandroid:id="@+id/row1"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/fore" android:id="@+id/button4"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/five" android:id="@+id/button5"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/six" android:id="@+id/button6"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/jian" android:id="@+id/button02"></Button></TableRow><TableRowandroid:id="@+id/row2"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/seven" android:id="@+id/button7"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/eight" android:id="@+id/button8"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/nine" android:id="@+id/button9"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/cheng" android:id="@+id/button03"></Button></TableRow><TableRowandroid:id="@+id/row3"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/zero" android:id="@+id/button0"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:id="@+id/button06" android:text="@string/dihao"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/dengyu" android:id="@+id/button05"></Button><Buttonandroid:layout_width="40dip"android:layout_height="fill_parent"android:layout_weight="1"android:textSize="25sp"android:text="@string/chu" android:id="@+id/button04"></Button></TableRow><LinearLayoutandroid:id="@+id/tableRow1"android:layout_width="fill_parent"android:layout_height="wrap_content"android:orientation="horizontal"android:layout_weight="1"><Buttonandroid:textSize="25sp"android:layout_height="fill_parent"android:layout_width="50dp"android:layout_weight="1" android:text="@string/zhengfu"android:id="@+id/zheng"></Button><Buttonandroid:id="@+id/pingfang"android:textSize="25sp"android:layout_height="fill_parent"android:layout_width="50dp"android:layout_weight="1" android:text="@string/ping"></Button><Buttonandroid:id="@+id/kaifang"android:textSize="25sp"android:layout_height="fill_parent"android:layout_width="50dp"android:layout_weight="1" android:text="@string/kai"></Button></LinearLayout></TableLayout></LinearLayout>主配置文件：<?xml version="1.0"encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="ymq.demo03"android:versionCode="1"android:versionName="1.0"><uses-sdk android:minSdkVersion="7"/><application android:icon="@drawable/icon"android:label="@string/app_name"><activity android:name=".demo03"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN"/><categoryandroid:name="UNCHER"/></intent-filter></activity></application></manifest>。

安卓开发的自制计算器源代码

这是本人自己用安卓编写的计算器，代码的优化可能有所问题，不过大家都在学习阶段，欢迎大家批评指正，还是上源码吧。

先来运行图package com.example.nanchen.exam_1_1;import android.content.DialogInterface;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class MainActivity extends AppCompatActivity implements View.OnClickListener{private Button btn0;private Button btn1;private Button btn2;private Button btn3;private Button btn4;private Button btn5;private Button btn6;private Button btn7;private Button btn8;private Button btn9;private Button btnAdd;private Button btnSub;private Button btnMul;private Button btnDiv;private Button btnDec;private Button btnEqual;private Button btnClear;private Button btnBackSpace;private TextView textView_result;double num1 = 0,num2 = 0,result = 0;//定义存储结果和两个操作数boolean isCheckEqu = false;//检测是否点击了等于int op = 0;//定义运算符boolean hasDec = false;boolean hasOp = false;@Overrideprotected void onCreate Bundle savedInstanceStatesuper.onCreate savedInstanceState;setContentView yout.activity_main;textView_result = TextView findViewById R.id.result;btn0 = Button findViewById R.id.btn0;btn1 = Button findViewById R.id.btn1;btn2 = Button findViewById R.id.btn2;btn3 = Button findViewById R.id.btn3;btn4 = Button findViewById R.id.btn4;btn5 = Button findViewById R.id.btn5;btn6 = Button findViewById R.id.btn6;btn7 = Button findViewById R.id.btn7;btn8 = Button findViewById R.id.btn8;btn9 = Button findViewById R.id.btn9;btnAdd = Button findViewById R.id.btn10;btnSub = Button findViewById R.id.btn11;btnMul = Button findViewById R.id.btn12;btnDiv = Button findViewById R.id.btn13;btnDec = Button findViewById R.id.btn14;btnEqual = Button findViewById R.id.btn15;btnClear = Button findViewById R.id.clear;btnBackSpace = Button findViewById R.id.backSpace;btn0.setOnClickListener this;btn1.setOnClickListener this;btn2.setOnClickListener this;btn3.setOnClickListener this;btn4.setOnClickListener this;btn5.setOnClickListener this;btn6.setOnClickListener this;btn7.setOnClickListener this;btn8.setOnClickListener this;btn9.setOnClickListener this;btnAdd.setOnClickListener this;btnSub.setOnClickListener this;btnDec.setOnClickListener this;btnDiv.setOnClickListener this;btnEqual.setOnClickListener this;btnMul.setOnClickListener this;btnClear.setOnClickListener this;btnBackSpace.setOnClickListener this;@Overridepublic void onClick View vswitch v.getIdcase R.id.btn0:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString0 =textView_result.getText.toString;if myString0.equals"0"myString0 = "";myString0 += "0";textView_result.setText myString0;break;case R.id.btn1:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString1 =textView_result.getText.toString;if myString1.equals"0"myString1 = "";myString1 += "1";textView_result.setText myString1;break;case R.id.btn2:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString2 =textView_result.getText.toString;if myString2.equals"0"myString2 = "";myString2 += "2";textView_result.setText myString2;break;case R.id.btn3:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString3 =textView_result.getText.toString;if myString3.equals"0"myString3 = "";myString3 += "3";textView_result.setText myString3;break;case R.id.btn4:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString4 =textView_result.getText.toString;if myString4.equals"0"myString4 = "";myString4 += "4";textView_result.setText myString4;break;case R.id.btn5:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString5 =textView_result.getText.toString;if myString5.equals"0"myString5 = "";myString5 += "5";textView_result.setText myString5;break;case R.id.btn6:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString6 =textView_result.getText.toString;if myString6.equals"0"myString6 = "";myString6 += "6";textView_result.setText myString6;break;case R.id.btn7:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString7 =textView_result.getText.toString;if myString7.equals"0"myString7 = "";myString7 += "7";textView_result.setText myString7;break;case R.id.btn8:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString8 =textView_result.getText.toString;if myString8.equals"0"myString8 = "";myString8 += "8";textView_result.setText myString8;break;case R.id.btn9:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString9 =textView_result.getText.toString;if myString9.equals"0"myString9 = "";myString9 += "9";textView_result.setText myString9;break;case R.id.btn10:if hasOpdoEqual;//显示出来当前的答案String myStringAdd =textView_result.getText.toString;if myStringAdd.equals nullreturn;num1 = Double.valueOf myStringAdd;textView_result.setText null;// 这里被清除了op = 1;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn11:if hasOpdoEqual;String myStringSub =textView_result.getText.toString;if myStringSub.equals nullreturn;num1 = Double.valueOf myStringSub;textView_result.setText null;op = 2;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn12:if hasOpdoEqual;String myStringMul =textView_result.getText.toString;if myStringMul.equals nullreturn;num1 = Double.valueOf myStringMul;textView_result.setText null;op = 3;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn13:if hasOpdoEqual;String myStringDiv =textView_result.getText.toString;if myStringDiv.equals nullreturn;num1 = Double.valueOf myStringDiv;textView_result.setText null;op = 4;hasDec = false;isCheckEqu = false;hasOp = true;break;case R.id.btn14:if isCheckEqutextView_result.setText null;isCheckEqu=false;if hasDec//如果已经有小数点了,则弹出一个对话框AlertDialog.Builder builder = new AlertDialog.Builder MainActivity.this;builder.setTitle"警告";builder.setMessage"输入错误，一个数字不能有两个小数点！";builder.setNegativeButton"取消", new DialogInterface.OnClickListener@Overridepublic void onClick DialogInterface dialog, int which;builder.show;return;hasDec = true;String myString14 =textView_result.getText.toString;myString14 += ".";textView_result.setText myString14;break;case R.id.btn15:doEqual;hasOp = false;break;case R.id.backSpace:String myString =textView_result.getText.toString;trytextView_result.setText myString.substring0,myString.length -1;catch Exception etextView_result.setText"0";break;case R.id.clear:textView_result.setText"0";break;default:break;/*** 按下等于*/private void doEqualStringmyStringEqu=textView_result.getText.toString;if myStringEqu.equals nullreturn;num2=Double.valueOf myStringEqu;textView_result.setText null;switch opcase 0:result=num2;break;case 1:result=num1+num2;break;case 2:result=num1-num2;break;case 3:result=num1*num2;break;case 4:result=num1/num2;break;default:result=0;break;textView_result.setText String.valueOf result;isCheckEqu=true;<?xml version="1.0" encoding="utf-8"?>LinearLayoutxmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="com.example.nanchen.exam_1_1.MainActivity"LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"TextViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/result"android:gravity="end"android:textSize="40sp"android:text="@string/zero"LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:orientation="horizontal"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:layout_weight="1"android:layout_height="wrap_content"android:text="@string/clear"android:id="@+id/clear"android:textAllCaps="false"android:gravity="center"android:textSize="25sp"Buttonandroid:layout_width="0dp"android:layout_weight="1"android:layout_height="wrap_content"android:text="@string/backspace"android:id="@+id/backSpace"android:textAllCaps="false"android:gravity="center"android:textSize="25sp" LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/seven"android:id="@+id/btn7"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/eight"android:id="@+id/btn8"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/nine"android:id="@+id/btn9"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/del"android:id="@+id/btn13"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/four"android:id="@+id/btn4"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/five"android:id="@+id/btn5"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/six"android:id="@+id/btn6"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/mul"android:id="@+id/btn12"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/one"android:textSize="30sp"android:id="@+id/btn1"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/two"android:id="@+id/btn2"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/three"android:id="@+id/btn3"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/sub"android:id="@+id/btn11"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/zero1"android:id="@+id/btn0"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/dec"android:id="@+id/btn14"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/equal"android:id="@+id/btn15"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/add"android:id="@+id/btn10"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"LinearLayoutLinearLayoutandroid:layout_weight="4"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="0dp"TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="20sp"android:text="@string/string1"TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/string2"android:textSize="20sp"LinearLayoutLinearLayout。

简易计算器Android版(源码)

简易计算器Android版（源码）说明：每完成一次计算后，需先clear 清除记忆，当然也可以连算XML布局<?xml version="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"><TableLayoutandroid:id="@+id/tableLayout1"android:layout_width="match_parent"android:layout_height="wrap_content"android:collapseColumns="4"><TableRowandroid:id="@+id/tableRow_et"android:layout_width="fill_parent"android:layout_height="fill_parent"><EditTextandroid:id="@+id/et"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="4"android:focusable="false"android:singleLine="true"android:inputType="text"android:gravity="right"></EditText></TableRow><TableRowandroid:id="@+id/tableRow1"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_7"android:layout_width="40px"android:layout_height="40px"android:text="7"/><Buttonandroid:id="@+id/bt_8"android:layout_width="40px"android:layout_height="40px"android:text="8"/><Buttonandroid:id="@+id/bt_9"android:layout_width="40px"android:layout_height="40px"android:text="9"/><Buttonandroid:id="@+id/bt_back"android:layout_width="40px"android:layout_height="40px"android:text="back"/></TableRow><TableRowandroid:id="@+id/tableRow2"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_4"android:layout_width="40px"android:layout_height="40px"android:text="4"/><Buttonandroid:id="@+id/bt_5"android:layout_width="40px"android:layout_height="40px"android:text="5"/><Buttonandroid:id="@+id/bt_6"android:layout_width="40px"android:layout_height="40px"android:text="6"/><Buttonandroid:id="@+id/bt_divide"android:layout_width="40px"android:layout_height="40px"android:text="/"/></TableRow><TableRowandroid:id="@+id/tableRow3"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_1"android:layout_width="40px"android:layout_height="40px"android:text="1"/><Buttonandroid:id="@+id/bt_2"android:layout_width="40px"android:layout_height="40px"android:text="2"/><Buttonandroid:id="@+id/bt_3"android:layout_width="40px"android:layout_height="40px"android:text="3"/><Buttonandroid:id="@+id/bt_multiply"android:layout_width="40px"android:layout_height="40px"android:text="*"/></TableRow><TableRowandroid:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_0"android:layout_width="50px"android:layout_height="40px"android:text="0"/><Buttonandroid:id="@+id/bt_point"android:layout_width="50px"android:layout_height="40px"android:text="."/><Buttonandroid:id="@+id/bt_add"android:layout_width="50px"android:layout_height="40px"android:text="+"/><Buttonandroid:id="@+id/bt_sub"android:layout_width="50px"android:layout_height="40px"android:text="-"/></TableRow><TableRowandroid:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_equal"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="3"android:text="="/><Buttonandroid:id="@+id/bt_clear"android:layout_width="50px"android:layout_height="40px"android:text="clear"/></TableRow></TableLayout></LinearLayout>源代码：package android.sdk;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class Android_calculatorActivity extends Activity {private Button bt_1;private Button bt_2;private Button bt_3;private Button bt_4;private Button bt_5;private Button bt_6;private Button bt_7;private Button bt_8;private Button bt_9;private Button bt_0;private Button bt_add;private Button bt_sub; // 减private Button bt_multiply; // 乘private Button bt_divide; // 除private Button bt_back;private Button bt_equal; // 等于private Button bt_point; // 点private Button bt_clear; // 清除private EditText et_play; // 显示private String str_oper = "+"; // 运算符private StringBuffer str_display = new StringBuffer();; // 显示private String str_result; // 结果显示private double num1;private double num2;private boolean flag = true; // 小数点个数开关控制；private boolean b_sub, b_mul, b_div; // 运算符开关控制@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(yout.main);bt_0 = (Button) findViewById(R.id.bt_0);bt_1 = (Button) findViewById(R.id.bt_1);bt_2 = (Button) findViewById(R.id.bt_2);bt_3 = (Button) findViewById(R.id.bt_3);bt_4 = (Button) findViewById(R.id.bt_4);bt_5 = (Button) findViewById(R.id.bt_5);bt_6 = (Button) findViewById(R.id.bt_6);bt_7 = (Button) findViewById(R.id.bt_7);bt_8 = (Button) findViewById(R.id.bt_8);bt_9 = (Button) findViewById(R.id.bt_9);bt_add = (Button) findViewById(R.id.bt_add);bt_sub = (Button) findViewById(R.id.bt_sub);bt_multiply = (Button) findViewById(R.id.bt_multiply);bt_divide = (Button) findViewById(R.id.bt_divide);bt_back = (Button) findViewById(R.id.bt_back);bt_equal = (Button) findViewById(R.id.bt_equal); bt_point = (Button) findViewById(R.id.bt_point); bt_clear = (Button) findViewById(R.id.bt_clear); et_play = (EditText) findViewById(R.id.et);et_play.setText("0.0");bt_0.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("0");et_play.setText(str_display.toString());}});bt_1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("1");et_play.setText(str_display.toString());}});bt_2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("2");et_play.setText(str_display.toString());}});bt_3.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("3");et_play.setText(str_display.toString());}});bt_4.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("4");et_play.setText(str_display.toString());}});bt_5.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("5");et_play.setText(str_display.toString());}});bt_6.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("6");et_play.setText(str_display.toString());}});bt_7.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("7");et_play.setText(str_display.toString());}});bt_8.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("8");et_play.setText(str_display.toString());}});bt_9.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("9");et_play.setText(str_display.toString());}});bt_point.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (flag){str_display.append(".");flag = false;}}});bt_back.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_display.length() != 0){str_display.deleteCharAt(str_display.length() - 1);et_play.setText(str_display.toString());}}});bt_add.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";if (!(str_display.toString() == "")){num1 += Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));flag = true;}});bt_sub.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "-";if (!b_sub && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_sub = true;} else{if (!(str_display.toString() == "")){num1 -=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_multiply.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "*";if (!b_mul && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_mul = true;} else{if (!(str_display.toString() == "")){num1 *=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_divide.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "/";if (!b_div && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_div = true;} else{if (!(str_display.toString() == "")){if(Double.parseDouble(str_display.toString()) == 0){Toast.makeText(Android_calculatorActivity.this,"除数不能为0！",Toast.LENGTH_LONG).show();} else{num1 /=Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_clear.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";str_display = new StringBuffer("");str_result = null;num1 = 0;num2 = 0;flag = true;b_sub = false;b_mul = false;b_div = false;et_play.setText("0.0");}});bt_equal.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_oper.equals("+")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 + num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("-")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 - num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("*")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 * num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("/")){num2 = Double.parseDouble(str_display.toString());if (!(num2 == 0)){str_result = String.valueOf((num1 / num2));et_play.setText(str_result);} else{Toast.makeText(Android_calculatorActivity.this,"除数不能为0！", Toast.LENGTH_LONG).show();}str_display = new StringBuffer("");}}});}。

自己写的计算器程序源代码

1，java语言的，写的不是很，有个不是很好的界面import java.awt.*;import java.awt.event.*;class cal extends WindowAdapter implements WindowListener,ActionListener{boolean h=false;boolean k=false;double a=0.0;double b=0.0;double c=0.0;String v;Frame f;Panel p1,p2,p3;Menu m1,m2,m3;MenuBar s;TextField t;Dialog d,d1;TextArea l,l1;public void dis(){f=new Frame("计算器");Da(f);Me();p1=new Panel();p2=new Panel();p3=new Panel();p2.setLayout(new GridLayout(4,5,5,5));p3.setLayout(new GridLayout(3,4,5,5));t=new TextField("0",25);t.setEditable(false);p1.add(t);f.add(p1,"North");f.setSize(220,320);f.setLocation(200,200);f.setBackground(Color.lightGray);f.addWindowListener(this);Button []b=new Button[32];String[]a={"7","8","9","+","clear","4","5","6","-","sqrt","1","2","3","×","cqrt","0",".","+/-","/","ln","log10","log(x)Y","%","x^y","sin","cos","tan","exp","asin","acos","atan","="};int i,j;for (i=0;i<=19;i++){b[i]=new Button(a[i]);b[i].addActionListener(this);p2.add(b[i]);}for (j=20;j<=31;j++){b[j]=new Button(a[j]);b[j].addActionListener(this);p3.add(b[j]);}f.add(p2,"Center");f.add(p3,"South");f.setV isible(true);}public void Me(){s=new MenuBar();f.setMenuBar(s);m1=new Menu("编辑(E)");m2=new Menu("查看(V)");m3=new Menu("帮助(H)");s.add(m1);s.add(m2);s.add(m3);m1.add(new MenuItem("Open"));m1.add(new MenuItem("Copy"));m1.add(new MenuItem("pastye"));m1.add(new MenuItem("Save",new MenuShortcut(KeyEvent.VK_S)));m1.add(new MenuItem("Exit"));m2.add(new MenuItem("Standard"));m2.add(new MenuItem("Science"));m1.addActionListener(this);m2.addActionListener(this);m3.add(new MenuItem("About"));m3.add(new MenuItem("Instructions"));m3.addActionListener(this);}public void windowClosing(WindowEvent e){if(e.getSource()==d)d.setV isible(false);else if(e.getSource()==d1)d1.setV isible(false);elseSystem.exit(0);}public void Da(Frame f){d=new Dialog(f,"Dialog",true);d.setSize(36,120);d.setLocation(200,200);d1=new Dialog(f,"使用说明",true);d1.setSize(200,202);d1.setLocation(200,200);l=new TextArea("",4,15,TextArea.SCROLLBARS_VERTICAL_ONLY);l1=new TextArea("",4,15,TextArea.SCROLLBARS_NONE);d.add(l);d1.add(l1);d.addWindowListener(this);d1.addWindowListener(this);}public void actionPerformed(ActionEvent e){float x;String q=e.getActionCommand();if(q=="Exit")System.exit(0);if(q=="About"){l.setText(" 该计算器实现加减乘除开方等基本运算,而且能够计算三角函数以及反三角函数的值，能够进行对数、乘方运算。

简单计算器设计源代码

Switch mSwitch=new Switch();
Button btn0,btn1,btn2,btn3,btn4,btn5;
Button btn6,btn7,btn8,btn9;
EditText et=null;
Button btnC,btnadd,btnsub,btnmul,btndiv,btnequal,btnpoint;
<Button
android:id="@+id/btn_seven_main"
android:layout_width="0dp"
android:layout_height="60dp"
android:layout_weight="1"
android:gravity="center"
android:textSize="40sp"
android:text="/"/>
</LinearLayout>
</LinearLayout>
源代码：
package com.example.num;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
android:text="-"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layoutid:orientation="horizontal" >

简单的计算器源代码

//计算器,已经编译通过import java.awt.*;import java.awt.event.*;import javax.swing.*;public class testZ extends JFrame implements ActionListener{private JPanel jPanel1,jPanel2;private JTextField resultField;private JButton s1,s2,s3,s4,s5,s6,s7,s8,s9,s0,b1,b2,b3,b4,f1,f2; private boolean end,add,sub,mul,div;private String str;private double num1,num2;public testZ(){super("计算器");setSize(300,240);Container con=getContentPane();con.setLayout(new BorderLayout());jPanel1=new JPanel();jPanel1.setLayout(new GridLayout(1,1));jPanel2=new JPanel();jPanel2.setLayout(new GridLayout(4,4));resultField=new JTextField("0");jPanel1.add(resultField);con.add(jPanel1,BorderLayout.NORTH);s1=new JButton(" 1 "); s1.addActionListener(this);s2=new JButton(" 2 "); s2.addActionListener(this);s3=new JButton(" 3 "); s3.addActionListener(this);s4=new JButton(" 4 "); s4.addActionListener(this);s5=new JButton(" 5 "); s5.addActionListener(this);s6=new JButton(" 6 "); s6.addActionListener(this);s7=new JButton(" 7 "); s7.addActionListener(this);s8=new JButton(" 8 "); s8.addActionListener(this);s9=new JButton(" 9 "); s9.addActionListener(this);s0=new JButton(" 0 "); s0.addActionListener(this);b1=new JButton(" + "); b1.addActionListener(this);b2=new JButton(" - "); b2.addActionListener(this);b3=new JButton(" * "); b3.addActionListener(this);b4=new JButton(" / "); b4.addActionListener(this);f1=new JButton(" . "); f1.addActionListener(this);f2=new JButton(" = "); f2.addActionListener(this);jPanel2.add(s1);jPanel2.add(s2);jPanel2.add(s3);jPanel2.add(b1);jPanel2.add(s4);jPanel2.add(s5);jPanel2.add(s6);jPanel2.add(b2);jPanel2.add(s7);jPanel2.add(s8);jPanel2.add(s9);jPanel2.add(b3);jPanel2.add(s0);jPanel2.add(f1);jPanel2.add(f2);jPanel2.add(b4);con.add(jPanel2,BorderLayout.CENTER);}public void num(int i){String s = null;s=String.valueOf(i);if(end){//如果数字输入结束，则将文本框置零，重新输入resultField.setText("0");end=false;}if((resultField.getText()).equals("0")){//如果文本框的内容为零，则覆盖文本框的内容resultField.setText(s);}else{//如果文本框的内容不为零，则在内容后面添加数字str = resultField.getText() + s;resultField.setText(str);}}public void actionPerformed(ActionEvent e){ //数字事件 if(e.getSource()==s1)num(1);else if(e.getSource()==s2)num(2);else if(e.getSource()==s3)num(3);else if(e.getSource()==s4)num(4);else if(e.getSource()==s5)num(5);else if(e.getSource()==s6)num(6);else if(e.getSource()==s7)num(7);else if(e.getSource()==s8)num(8);else if(e.getSource()==s9)num(9);else if(e.getSource()==s0)num(0);//符号事件else if(e.getSource()==b1)sign(1);else if(e.getSource()==b2)sign(2);else if(e.getSource()==b3)sign(3);else if(e.getSource()==b4)sign(4);//等号else if(e.getSource()==f1){str=resultField.getText();if(str.indexOf(".")<=1){str+=".";resultField.setText(str);}}else if(e.getSource()==f2){num2=Double.parseDouble(resultField.getText());if(add){num1=num1 + num2;}else if(sub){num1=num1 - num2;}else if(mul){num1=num1 * num2;}else if(div){num1=num1 / num2;}resultField.setText(String.valueOf(num1));end=true;}}public void sign(int s){if(s==1){add=true;sub=false;mul=false;div=false;}else if(s==2){add=false;sub=true;mul=false;div=false;}else if(s==3){add=false;sub=false;mul=true;div=false;}else if(s==4){add=false;sub=false;mul=false;div=true;}num1=Double.parseDouble(resultField.getText()); end=true;}public static void main(String[] args){testZ th1=new testZ();th1.show();}}。

计算器源代码

这几天在做一个小计算器，经过两天的调试终于算是做完了（可能还有小Bug）。

最多可以到10的15次方。

源代码如下（源码我已经放到Skydrive上了，点这里下载)：// CalculatorDlg.cpp : implementation file//#include "stdafx.h"#include "Calculator.h"#include "CalculatorDlg.h"#include "math.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// CAboutDlg dialog used for App AboutDisplay *Pdisplay;class CAboutDlg : public CDialog{public:CAboutDlg();// Dialog Dataenum { IDD = IDD_ABOUTBOX };protected:virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support// Implementationprotected:DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD){}void CAboutDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()// CCalculatorDlg dialogCCalculatorDlg::CCalculatorDlg(CWnd* pParent /*=NULL*/): CDialog(CCalculatorDlg::IDD, pParent), Cal_display(_T("WELCOME")){m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);Pdisplay=new Display(this);}void CCalculatorDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);DDX_Text(pDX, IDC_EDIT1, Cal_display);}BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()//}}AFX_MSG_MAP// ON_WM_KEYDOWN()ON_BN_CLICKED(IDOK, &CCalculatorDlg::OnBnClickedOk)ON_BN_CLICKED(IDCANCEL, &CCalculatorDlg::OnBnClickedCancel)ON_BN_CLICKED(IDCANCEL2, &CCalculatorDlg::OnBnClickedCancel2) ON_BN_CLICKED(IDOK4, &CCalculatorDlg::OnBnClickedOk4)ON_BN_CLICKED(IDOK6, &CCalculatorDlg::OnBnClickedOk6)ON_BN_CLICKED(IDOK2, &CCalculatorDlg::OnBnClickedOk2)ON_BN_CLICKED(IDCANCEL3, &CCalculatorDlg::OnBnClickedCancel3) ON_BN_CLICKED(IDOK3, &CCalculatorDlg::OnBnClickedOk3)ON_BN_CLICKED(IDCANCEL4, &CCalculatorDlg::OnBnClickedCancel4) ON_BN_CLICKED(IDCANCEL6, &CCalculatorDlg::OnBnClickedCancel6) ON_BN_CLICKED(IDCANCEL5, &CCalculatorDlg::OnBnClickedCancel5) ON_BN_CLICKED(IDCANCEL8, &CCalculatorDlg::OnBnClickedCancel8) ON_BN_CLICKED(IDCANCEL9, &CCalculatorDlg::OnBnClickedCancel9) ON_BN_CLICKED(IDCANCEL7, &CCalculatorDlg::OnBnClickedCancel7) ON_BN_CLICKED(IDOK5, &CCalculatorDlg::OnBnClickedOk5)ON_BN_CLICKED(IDOK7, &CCalculatorDlg::OnBnClickedOk7)ON_BN_CLICKED(IDCANCEL10, &CCalculatorDlg::OnBnClickedCancel10) ON_BN_CLICKED(IDOK8, &CCalculatorDlg::OnBnClickedOk8)ON_BN_CLICKED(IDCANCEL12, &CCalculatorDlg::OnBnClickedCancel12)ON_BN_CLICKED(IDCANCEL11, &CCalculatorDlg::OnBnClickedCancel11)ON_BN_CLICKED(IDOK9, &CCalculatorDlg::OnBnClickedOk9)ON_BN_CLICKED(IDCANCEL13, &CCalculatorDlg::OnBnClickedCancel13)ON_BN_CLICKED(IDOK10, &CCalculatorDlg::OnBnClickedOk10)ON_BN_CLICKED(IDCANCEL15, &CCalculatorDlg::OnBnClickedCancel15)ON_BN_CLICKED(IDCANCEL14, &CCalculatorDlg::OnBnClickedCancel14)ON_WM_KEYUP()END_MESSAGE_MAP()// CCalculatorDlg message handlersBOOL CCalculatorDlg::OnInitDialog(){CDialog::OnInitDialog();// Add "About..." menu item to system menu.// IDM_ABOUTBOX must be in the system command range.ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX < 0xF000);CMenu* pSysMenu = GetSystemMenu(FALSE);if (pSysMenu != NULL){CString strAboutMenu;strAboutMenu.LoadString(IDS_ABOUTBOX);if (!strAboutMenu.IsEmpty()){pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);}}// Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialogSetIcon(m_hIcon, TRUE); // Set big iconSetIcon(m_hIcon, FALSE); // Set small icon// TODO: Add extra initialization herereturn TRUE; // return TRUE unless you set the focus to a control}//--------------------------------------------------------------------------------------------------//void CCalculatorDlg::OnKeyDown(UINT nChar,UINT nRepCnt,UINT nFlags) //{//int a=1;//CDialog::OnKeyDown(nChar, nRepCnt, nFlags);//}//void CCalculatorDlg::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) //{// int a=1;//// CDialog::OnKeyUp(nChar, nRepCnt, nFlags);//}void CCalculatorDlg::OnSysCommand(UINT nID, LPARAM lParam){if ((nID & 0xFFF0) == IDM_ABOUTBOX){CAboutDlg dlgAbout;dlgAbout.DoModal();}else if(nID==SC_CLOSE){CCalculatorDlg::OnOK();}else{CDialog::OnSysCommand(nID, lParam);}}// If you add a minimize button to your dialog, you will need the code below// to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework.void CCalculatorDlg::OnPaint(){if (IsIconic()){CPaintDC dc(this); // device context for paintingSendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);// Center icon in client rectangleint cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIcon + 1) / 2;// Draw the icondc.DrawIcon(x, y, m_hIcon);}else{CDialog::OnPaint();}}// The system calls this function to obtain the cursor to display while the user drags// the minimized window.HCURSOR CCalculatorDlg::OnQueryDragIcon(){return static_cast<HCURSOR>(m_hIcon);}//------------------------------OnButtonnClicked 部分-------------------------------------------------------------------------void CCalculatorDlg::OnBnClickedOk(){Caldata.CLEAR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel(){Caldata.MC();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel2() {Caldata.MR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk4() {Caldata.KEYIN(1);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk6() {Caldata.KEYIN(4);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk2() {Caldata.MM();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel3() {Caldata.MA();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk3() {Caldata.PN();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel4() {Caldata.ADD();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel6() {Caldata.KEYIN(2);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel5() {Caldata.KEYIN(3);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel8() {Caldata.KEYIN(6);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel9() {Caldata.KEYIN(5);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel7() {Caldata.MINUS();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk5(){Caldata.Mode_Error=Caldata.SQRT(); UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk7(){Caldata.SQR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel10() {Caldata.BY();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk8(){Caldata.KEYIN(7);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel12() {Caldata.KEYIN(8);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel11() {Caldata.KEYIN(9);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk9(){Caldata.Mode_Error=Caldata.REC(); UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel13() {Caldata.DIV();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk10() {Caldata.Dot();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel15() {Caldata.KEYIN(0);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel14() {Caldata.Mode_Error=Caldata.EQUAL();UpdateDisplay();}//------------------------------------------Display部分-----------------------------------------------------------------void CCalculatorDlg::UpdateDisplay(){if(!Caldata.Mode_Error){if(!(Caldata.Mode_Dot)){Cal_display.Format(_T("%lf"),Caldata.Data_Display);for(int i=Cal_display.GetLength()-1;i>1;i--) //去掉尾部多余的0，这个方法可共用，可以写成STATIC{if(Cal_display.GetAt(i)=='.')break;if(Cal_display.GetAt(i)=='0')Cal_display.Delete(i);else break;}}else {if(Caldata.Data_Display!=0){int j=0;Cal_display.Format(_T("%lf"),Caldata.Data_Display);for(int i=Cal_display.GetLength()-1;i>1;i--){if(Cal_display.GetAt(i)=='.')break;if(Cal_display.GetAt(i)=='0')Cal_display.Delete(i);else break;}for(int i=Cal_display.GetLength()-1;i>1;i--){ if(Cal_display.GetAt(i)=='.') break;j++;}if(j<=Caldata.Digi_Dot)for(int i=0;i<Caldata.Digi_Dot-j;i++) //小数输入，尾部补0Cal_display.Append(_T("0")); }else{Cal_display.Format(_T("0."));for(int i=0;i<Caldata.Digi_Dot;i++){Cal_display.Append(_T("0"));}}}}else Cal_display.Format(_T("ERROR"));UpdateData(false);}void CCalculatorDlg::ResetDisplay(){}//--------------------------------CALDATA 部分-----------------------------------------------------------Cal_Data::Cal_Data(){Data_Display=0;Data_Remember=0;Data_Last=0;Mode_Remenber=false;Mode_Input=false;Mode_Dot=false;Mode_Error=false;Digi_Dot=0;calaction=Cal_Action::Action_Null;}void Cal_Data::CLEAR(){Data_Display=0;Data_Last=0;Mode_Input=false;Mode_Error=false;Mode_Dot=false;calaction=Cal_Action::Action_Null;}void Cal_Data::MA(){Data_Remember=Data_Remember+Data_Display; }void Cal_Data::MM(){Data_Remember=Data_Remember-Data_Display; }void Cal_Data::MR(){Data_Display=Data_Remember;Mode_Input=false;}void Cal_Data::MC(){Data_Remember=0;Mode_Remenber=false;}void Cal_Data::ADD(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false; calaction=Cal_Action::Action_Add;}void Cal_Data::MINUS(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_Minus;}void Cal_Data::BY(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_By;}void Cal_Data::DIV(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_Divide;}bool Cal_Data::EQUAL(){double TMP;Digi_Dot=0;Mode_Dot=false;switch(calaction){case Cal_Action::Action_Add : Data_Display+=Data_Last; Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Minus: Data_Display=Data_Last-Data_Display;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_By: Data_Display*=Data_Last;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Divide: if(Data_Display==0)return true;else Data_Display=Data_Last/Data_Display;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Null: Mode_Dot=Mode_Input=false;break;}calaction=Cal_Action::Action_Null;return false;}void Cal_Data::SQR(){Data_Display*=Data_Display;Mode_Dot=Mode_Input=false;}bool Cal_Data::SQRT(){Mode_Dot=Mode_Input=false;if(Data_Display<0)return true;Data_Display=sqrt(Data_Display);return false;}bool Cal_Data::REC(){Mode_Dot=Mode_Input=false;if(Data_Display==0)return true;else Data_Display=1/Data_Display;return false;}void Cal_Data::PN(){if(Data_Display!=0) Data_Display=-Data_Display;}void Cal_Data::Dot(){if(!Mode_Dot) { Mode_Dot=true;Digi_Dot=0;}}void Cal_Data::KEYIN(int value){ if(Data_Display>=100000000000000) //double型的数大于100000000000000后精度不高，所以限定为15位return;if(!Mode_Input){ Mode_Input=true;Data_Display=0;}if(!Mode_Dot){Data_Display*=10.0;Data_Display=Data_Display>=0? Data_Display+(double)value: Data_Display-(double)value;}else{if(Digi_Dot>=6) //小数点后面最多输入到第6位，否者会出错（double的精度不高）return;Digi_Dot++;double TMP=value;for(int i=0;i<Digi_Dot;i++){TMP=TMP/10.0;}Data_Display=Data_Display>=0? Data_Display+TMP:Data_Display-TMP;。

基于android简单句计算器代码

第一：功能描述：1 实现简单的开发加减乘除运算2 可以实现删除数据功能第二：源代码：Calculator/res/layout/main.xml<?xml version="1.0"encoding="utf-8"?><AbsoluteLayout android:id="@+id/widget0"android:layout_width="fill_parent"android:layout_height="fill_parent"xmlns:android="/apk/res/android"><TextView android:id="@+id/txtResult" android:layout_width="296px"android:layout_height="43px"android:background="#ffffffff"android:text="0.0"android:textSize="28sp" android:textStyle="bold"android:textColor="#ff333333"android:layout_x="11dp"android:layout_y="16dp"android:gravity="right"android:padding="2px"/> <Button android:id="@+id/btn1" android:layout_width="60px"android:layout_height="60px"android:text="1"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="15dp"android:layout_y="85dp"android:onClick="digital_click"/><Button android:id="@+id/btn2" android:layout_width="60px"android:layout_height="60px"android:text="2"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="85dp"android:layout_y="85dp"android:onClick="digital_click"/><Button android:id="@+id/btn3" android:layout_width="60px"android:layout_height="60px"android:text="3"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="155dp"android:layout_y="85dp"android:onClick="digital_click"/><Button android:id="@+id/btnAdd" android:layout_width="80px"android:layout_height="60px"android:text="+"android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="225dp"android:layout_y="85dp"android:onClick="add"/><Button android:id="@+id/btn4" android:layout_width="60px"android:layout_height="60px"android:text="4"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="15dp"android:layout_y="155dp"android:onClick="digital_click"/><Button android:id="@+id/btn5" android:layout_width="60px"android:layout_height="60px"android:text="5"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="85dp"android:layout_y="155dp"android:onClick="digital_click"/><Button android:id="@+id/btn6" android:layout_width="60px"android:layout_height="60px"android:text="6"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="155dp"android:layout_y="155dp"android:onClick="digital_click"/><Button android:id="@+id/btnsub" android:layout_width="80px"android:layout_height="60px"android:text="-"android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="225dp"android:layout_y="155dp"android:onClick="sub"/><Button android:id="@+id/btn7" android:layout_width="60px"android:layout_height="60px"android:text="7"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="15dp"android:layout_y="225dp"android:onClick="digital_click"/><Button android:id="@+id/btn8" android:layout_width="60px"android:layout_height="60px"android:text="8"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="85dp"android:layout_y="225dp"android:onClick="digital_click"/><Button android:id="@+id/btn9" android:layout_width="60px"android:layout_height="60px"android:text="9"android:textSize="20sp"android:background="#ff00ff99"android:textStyle="bold"android:gravity="center"android:layout_x="155dp"android:layout_y="225dp"android:onClick="digital_click"/><Button android:id="@+id/btnMul" android:layout_width="80px"android:layout_height="60px"android:text="*"android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="225dp"android:layout_y="225dp"android:onClick="mul"/><Button android:id="@+id/btn0" android:layout_width="130px"android:layout_height="60px"android:text="0"android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="15dp"android:layout_y="295dp"android:onClick="digital_click"/><Button android:id="@+id/btnPoint" android:layout_width="60px"android:layout_height="60px"android:text="."android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="155dp"android:layout_y="295dp"android:onClick="point_click"/><Button android:id="@+id/btnDiv" android:layout_width="80px"android:layout_height="60px"android:text="/"android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="225dp"android:layout_y="295dp"android:onClick="div"/><Button android:id="@+id/btndel"android:layout_width="60px"android:layout_height="60px"android:text="DE>"android:textSize="20sp"android:textStyle="bold"android:textColor="#ffff3333"android:gravity="center"android:layout_x="15dp"android:layout_y="365dp"android:onClick="del"/><Button android:id="@+id/btnequ" android:layout_width="220px"android:layout_height="60px"android:text="=" android:text="="android:textSize="20sp"android:textStyle="bold"android:gravity="center"android:layout_x="85dp"android:layout_y="365dp"android:onClick="equ"/></AbsoluteLayout>第三：calculator/src/com.gallop.ma/calcu.javapackage com.gallop.ma;import java.text.NumberFormat;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class calcu extends Activity {/** Called when the activity is first created. */double firstNum = 0;// 第一个输入的数据char currentSign = '+';// 记录第一次输入的符号StringBuffer currentNum = new StringBuffer();// 得到textview中的数据boolean isFirstPoint = false;// 第一个数据是否是小数点TextView txtResult;// 输出结果@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.main);txtResult = (TextView) findViewById(R.id.txtResult);}/*** 对数据进行初始化** @return*/public void init() {currentNum.delete(0, currentNum.length());// 设置当前textView中的值为0isFirstPoint = false;}/***将输入的数据转换成double类型** @return*/public double stringToDouble() {if (currentNum.length() == 0) {// 如果没有输入的数据return 0;}double result = Double.parseDouble(currentNum.toString());return result;}/*** 进行计算处理* @return*/public double calcu(){double result=0;switch(currentSign){case '+':result=firstNum+stringToDouble();break;case '-':result=firstNum-stringToDouble();break;case '*':result=firstNum*stringToDouble();break;case '/':result=firstNum/stringToDouble();break;}//对小数点后的数据进行格式化NumberFormat format =NumberFormat.getInstance();format.setMaximumFractionDigits(2);result=Double.parseDouble(format.format(result ));return result;}/*** 显示数据*/public void display(){txtResult.setText(currentNum.toString()); }/*** 处理数据按钮的点击** @param view*/public void digital_click(View view) {Button btnDigital=(Button) view;char text=btnDigital.getText().charAt(0); currentNum.append(text);display();}/*** 处理加法**/public void add(View view) {double result=calcu();txtResult.setText(String.valueOf(result));firstNum=result;currentSign='+';init();}/*** 处理减法**/public void sub(View view) {double result=calcu();txtResult.setText(String.valueOf(result)); firstNum=result;currentSign='-';init();}/*** 处理乘法**/public void mul(View view) {double result=calcu();txtResult.setText(String.valueOf(result)); firstNum=result;currentSign='*';init();}/*** 处理除法**/public void div(View view) {double result=calcu();txtResult.setText(String.valueOf(result)); firstNum=result;currentSign='/';init();}/*** 处理等于**/public void equ(View view) {double result=calcu();txtResult.setText(String.valueOf(result)); firstNum=result;currentSign='+';init();}/*** 处理小数点**/public void point_click(View view) {if(isFirstPoint){//当地一个数据为小数点时程序返回return;}if(currentNum.length()==0){//当没有输入的数据时返回return;}Button btnPoint=(Button)view;char text=btnPoint.getText().charAt(0); currentNum.append(text);isFirstPoint=true;display();}/*** 处理删除数据*/public void del(View view){if(currentNum.length()>=1){currentNum.delete(currentNum.length()-1,curren tNum.length());}if(currentNum.length()==0){init();display();}txtResult.setText(currentNum);}}。

计算器安卓源代码

Java源代码package com.example.jisuanqi; import java.util.Date;import android.app.Activity;import android.os.Bundle;import android.view.View;importandroid.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText;public class MainActivity extends Activity {private Button one;private Button two;private Button four; private Button five; private Button six; private Button seven; private Button eight; private Button nine; private Button zero; private Button dot; private Button add; private Button sub; private Button mult; private Button division; private Button amount; private Button clear;private Button sqrt;private Button pow;private EditText led;String num1 = "";String num2 = "";double num3 = 0;String rezult = "";String sign = null;int mark = 0;boolean flag = true;boolean dotmark = true;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState) ;setContentView(yout.activity_m ain);zero = (Button) findViewById(R.id.zero);one = (Button) findViewById(R.id.one);two = (Button) findViewById(R.id.two);three = (Button) findViewById(R.id.three);four = (Button) findViewById(R.id.four);five = (Button) findViewById(R.id.five);six = (Button) findViewById(R.id.six);seven = (Button) findViewById(R.id.seven);eight = (Button) findViewById(R.id.eight);nine = (Button) findViewById(R.id.nine);dot = (Button) findViewById(R.id.dot);add = (Button)findViewById(R.id.add);sub = (Button) findViewById(R.id.sub);mult = (Button) findViewById(R.id.mult);division = (Button) findViewById(R.id.division);clear = (Button) findViewById(R.id.clear);amount = (Button) findViewById(R.id.amount);time = (Button) findViewById(R.id.time);pow = (Button) findViewById(R.id.pow);sqrt = (Button) findViewById(R.id.sqrt);led = (EditText) findViewById(R.id.led);zero.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "0";led.setText(num1);} else if (mark == 1) {num2 = num2 + "0";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "0";led.setText(num1 + sign + num2);}}});one.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "1";led.setText(num1);} else if (mark == 1) {num2 = num2 + "1";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "1";led.setText(num1 + sign + num2);}}});two.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "2";led.setText(num1);} else if (mark == 1) {num2 = num2 + "2";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "2";led.setText(num1 + sign + num2);}}});three.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "3";led.setText(num1);} else if (mark == 1) {num2 = num2 + "3";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "3";led.setText(num1 + sign + num2);}}});four.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "4";led.setText(num1);} else if (mark == 1) {num2 = num2 + "4";led.setText(num1 + sign +num2);} else {num1 = String.valueOf(num3);num2 = num2 + "4";led.setText(num1 + sign + num2);}}});five.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "5";led.setText(num1);} else if (mark == 1) {num2 = num2 + "5";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "5";led.setText(num1 + sign + num2);}}});six.setOnClickListener(newOnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "6";led.setText(num1);} else if (mark == 1) {num2 = num2 + "6";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "6";led.setText(num1 + sign + num2);}}});seven.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "7";led.setText(num1);} else if (mark == 1) {num2 = num2 + "7";led.setText(num1 + sign + num2);} else {num1 =String.valueOf(num3);num2 = num2 + "7";led.setText(num1 + sign + num2);}}});eight.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "8";led.setText(num1);} else if (mark == 1) {num2 = num2 + "8";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "8";led.setText(num1 + sign + num2);}}});nine.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0) {num1 = num1 + "9";led.setText(num1);} else if (mark == 1) {num2 = num2 + "9";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "9";led.setText(num1 + sign + num2);}}});add.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "+";mark++;flag = false;dotmark = true;}}});sub.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "-";mark++;flag = false;dotmark = true;}}});mult.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "*";mark++;flag = false;dotmark = true;}}});division.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "÷";mark++;flag = false;dotmark = true;}}});pow.setOnClickListener(newOnClickListener() {public void onClick(View v) {if (flag) {sign = "^";mark++;flag = false;dotmark = true;}}});dot.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (dotmark) {if (mark == 0) {num1 = num1 + ".";led.setText(num1);} else if (mark == 1) {num2 = num2 + ".";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + ".";led.setText(num1 + sign + num2);}dotmark = false;}}});amount.setOnClickListener(new OnClickListener() { // 等于时发生的运算public void onClick(View v) {flag = true;dotmark = true;if (sign.equals("+")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x + y;rezult =String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("-")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x - y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("*")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x * y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("÷")) {double x = Double.parseDouble(num1);double y =Double.parseDouble(num2);num3 = x / y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("^")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = Math.pow(x, y);rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";}}});clear.setOnClickListener(new OnClickListener() {public void onClick(View v) {num1 = "";num2 = "";num3 = 0;mark = 0;sign = "";led.setText("0");flag = true;dotmark = true;}});sqrt.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0 && !num1.equals("") && num2.equals("")) {double parent = Double.parseDouble(num1);double root = Math.sqrt(parent);rezult = String.valueOf(root);led.setText(rezult);num1 = "";}}});time.setOnClickListener(new OnClickListener() {public void onClick(View v) {Date date = new Date();led.setText(date.toLocaleString());}});}}Layout（布局）<LinearLayoutxmlns:android="http://schemas /apk/res/android"xmlns:tools="http://schemas.a /tools"android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:orientation="vertical "tools:context=".MainActivity" ><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="2" android:orientation="horizont al"><EditTextandroid:id="@+id/led" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_margin="3dip" android:background="#ccc" android:gravity="top|right"android:text="" android:textColor="#000" android:textSize="12pt"/> </LinearLayout><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="1"android:orientation="horizont al"><Buttonandroid:id="@+id/time" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1" android:text="time"android:textSize="10pt"/><Buttonandroid:id="@+id/pow"android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="pow" android:textSize="10pt"/><Buttonandroid:id="@+id/sqrt" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1" android:text="sqrt"android:textSize="10pt"/><Buttonandroid:id="@+id/clear" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1" android:text="clear" android:textSize="10pt"/> </LinearLayout><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="1" android:orientation="horizont al"><Buttonandroid:id="@+id/seven" android:layout_width="fill_pa rent"android:layout_height="fill_parent"android:layout_weight="1"android:text="7" android:textSize="12pt"/><Buttonandroid:id="@+id/eight" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="8" android:textSize="12pt"/><Buttonandroid:id="@+id/nine" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="9" android:textSize="12pt"/><Buttonandroid:id="@+id/division" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="÷" android:textSize="12pt"/> </LinearLayout><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="1" android:orientation="horizont al"><Buttonandroid:id="@+id/four" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="4" android:textSize="12pt"/><Buttonandroid:id="@+id/five" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="5" android:textSize="12pt"/><Buttonandroid:id="@+id/six" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="6" android:textSize="12pt"/><Buttonandroid:id="@+id/mult" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="*" android:textSize="12pt"/> </LinearLayout><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="1" android:orientation="horizont al"><Buttonandroid:id="@+id/one" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="1" android:textSize="12pt"/><Buttonandroid:id="@+id/two" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="2" android:textSize="12pt"/><Buttonandroid:id="@+id/three" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="3" android:textSize="12pt"/><Buttonandroid:id="@+id/sub" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="-"android:textSize="12pt"/> </LinearLayout><LinearLayoutandroid:layout_width="fill_pa rent"android:layout_height="wrap_c ontent"android:layout_weight="1" android:orientation="horizont al"><Buttonandroid:id="@+id/dot" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="." android:textSize="12pt"/><Buttonandroid:id="@+id/zero" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="0" android:textSize="12pt"/><Buttonandroid:id="@+id/amount" android:layout_width="fill_pa rent"android:layout_height="fill_p arent"android:layout_weight="1"android:text="=" android:textSize="12pt"/><Buttonandroid:id="@+id/add" android:layout_width="fill_pa rent"。

android计算器源代码

界面设计<LinearLayoutxmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"tools:context=".MainActivity"><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="2"android:orientation="horizontal"><EditTextandroid:id="@+id/led"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_margin="3dip"android:background="#ccc"android:gravity="top|right"android:text=""android:textColor="#000"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/time"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="time"android:textSize="10pt"/><Buttonandroid:id="@+id/pow"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="pow"android:textSize="10pt"/><Buttonandroid:id="@+id/sqrt"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="sqrt"android:textSize="10pt"/><Buttonandroid:id="@+id/clear"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="clear"android:textSize="10pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/seven"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="7"android:textSize="12pt"/><Buttonandroid:id="@+id/eight"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="8"android:textSize="12pt"/><Buttonandroid:id="@+id/nine"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="9"android:textSize="12pt"/><Buttonandroid:id="@+id/division"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="÷"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/four"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="4"android:textSize="12pt"/><Buttonandroid:id="@+id/five"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="5"android:textSize="12pt"/><Buttonandroid:id="@+id/six"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="6"android:textSize="12pt"/><Buttonandroid:id="@+id/mult"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="*"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/one"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="1"android:textSize="12pt"/><Buttonandroid:id="@+id/two"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="2"android:textSize="12pt"/><Buttonandroid:id="@+id/three"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="3"android:textSize="12pt"/><Buttonandroid:id="@+id/sub"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="-"android:textSize="12pt"/></LinearLayout>Java源代码package youtclss;import java.util.Date;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener; import android.widget.Button;import android.widget.EditText;public class MainActivity extends Activity { private Button one;private Button two;private Button three;private Button four;private Button five;private Button six;private Button seven;private Button eight;private Button nine;private Button zero;private Button dot;private Button add;private Button sub;private Button mult;private Button division;private Button amount;private Button clear;private Button time;private Button sqrt;private Button pow;private EditText led;String num1 = "";String num2 = "";double num3 = 0;String rezult = "";String sign = null;int mark = 0;boolean flag = true;boolean dotmark = true;protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);setContentView(yout.main);zero = (Button) findViewById(R.id.zero);one = (Button) findViewById(R.id.one);two = (Button) findViewById(R.id.two);three = (Button) findViewById(R.id.three);four = (Button) findViewById(R.id.four);five = (Button) findViewById(R.id.five);six = (Button) findViewById(R.id.six);seven = (Button) findViewById(R.id.seven);eight = (Button) findViewById(R.id.eight);nine = (Button) findViewById(R.id.nine);dot = (Button) findViewById(R.id.dot);add = (Button) findViewById(R.id.add);sub = (Button) findViewById(R.id.sub);mult = (Button) findViewById(R.id.mult);division = (Button) findViewById(R.id.division); clear = (Button) findViewById(R.id.clear); amount = (Button) findViewById(R.id.amount); time = (Button) findViewById(R.id.time);pow = (Button) findViewById(R.id.pow);sqrt = (Button) findViewById(R.id.sqrt);led = (EditText) findViewById(R.id.led);zero.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "0";led.setText(num1);} else if (mark == 1) {num2 = num2 + "0";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "0";led.setText(num1 + sign + num2);}}});one.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "1";led.setText(num1);} else if (mark == 1) {num2 = num2 + "1";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "1";led.setText(num1 + sign + num2);}}});two.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "2";led.setText(num1);} else if (mark == 1) {num2 = num2 + "2";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "2";led.setText(num1 + sign + num2);}}});three.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "3";led.setText(num1);} else if (mark == 1) {num2 = num2 + "3";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "3";led.setText(num1 + sign + num2);}}});four.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "4";led.setText(num1);} else if (mark == 1) {num2 = num2 + "4";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "4";led.setText(num1 + sign + num2);}}});five.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "5";led.setText(num1);} else if (mark == 1) {num2 = num2 + "5";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "5";led.setText(num1 + sign + num2);}}});six.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "6";led.setText(num1);} else if (mark == 1) {num2 = num2 + "6";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "6";led.setText(num1 + sign + num2);}}});seven.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "7";led.setText(num1);} else if (mark == 1) {num2 = num2 + "7";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "7";led.setText(num1 + sign + num2);}}});eight.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "8";led.setText(num1);} else if (mark == 1) {num2 = num2 + "8";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "8";led.setText(num1 + sign + num2);}}});nine.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "9";led.setText(num1);} else if (mark == 1) {num2 = num2 + "9";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "9";led.setText(num1 + sign + num2);}}});add.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "+";mark++;flag = false;dotmark = true;}}});sub.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "-";mark++;flag = false;dotmark = true;}}});mult.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "*";mark++;flag = false;dotmark = true;}}});division.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "÷";mark++;flag = false;dotmark = true;}}});pow.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "^";mark++;flag = false;dotmark = true;}}});dot.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (dotmark) {if (mark == 0) {num1 = num1 + ".";led.setText(num1);} else if (mark == 1) {num2 = num2 + ".";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + ".";led.setText(num1 + sign + num2);}dotmark = false;}}});amount.setOnClickListener(new OnClickListener() { // 等于时发生的运算public void onClick(View v) {flag = true;dotmark = true;if (sign.equals("+")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x + y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("-")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x - y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("*")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x * y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("÷")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x / y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 +"=" + rezult);num2 = "";} else if (sign.equals("^")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = Math.pow(x, y);rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";}}});clear.setOnClickListener(new OnClickListener() {public void onClick(View v) {num1 = "";num2 = "";num3 = 0;mark = 0;sign = "";led.setText("0");flag = true;dotmark = true;}});sqrt.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0 && !num1.equals("") &&num2.equals("")) {double parent =Double.parseDouble(num1);double root = Math.sqrt(parent);rezult = String.valueOf(root);led.setText(rezult);num1 = "";}}});time.setOnClickListener(new OnClickListener() { public void onClick(View v) {Date date = new Date();led.setText(date.toLocaleString());}});}。

android计算器源码

这是我本人做的Android 简单计算器源代码。

可以实现普通四则运算2,10,16进制转换。

常见异常处理，可以实现activity屏幕跳转。

算法用逆波兰实现。

本项目所有代码不涉及任何知识产权问题，完全由自己学习android时候写的，所以各位可以放心下载。

AndroidManifest.xml代码<?xml version="1.0"encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="my.calu"android:versionCode="1"android:versionName="1.0"><application android:icon="@drawable/meinv"android:label="@string/app_name"><activity android:name=".Main"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN"/><categoryandroid:name="UNCHER"/></intent-filter></activity></application><uses-sdk android:minSdkVersion="4"/></manifest>//layout 代码<?xml version="1.0"encoding="utf-8"?><AbsoluteLayoutandroid:id="@+id/background"android:layout_width="fill_parent"android:layout_height="fill_parent"xmlns:android="/apk/res/android"><Buttonandroid:id="@+id/binary_sign"android:layout_width="73px"android:layout_height="52px"android:text="10/2"android:layout_x="14dp"android:layout_y="148dp"/><Buttonandroid:id="@+id/sexadecimal_sign"android:layout_width="73px"android:layout_height="52px"android:text="10/16"android:layout_x="88dp"android:layout_y="148dp"/><Buttonandroid:id="@+id/add_sign"android:layout_width="73px"android:layout_height="52px"android:text="+"android:layout_x="240dp"android:layout_y="382dp"/><EditTextandroid:id="@+id/editview"android:layout_width="295px"android:layout_height="76px"android:text=""android:textSize="18sp"android:layout_x="8dp"android:layout_y="14dp"/><Buttonandroid:id="@+id/number0"android:layout_width="73px"android:layout_height="52px"android:text="0"android:layout_x="89dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/point_sign"android:layout_width="73px"android:layout_height="52px"android:text="."android:layout_x="10dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/sub_sign"android:layout_width="73px"android:layout_height="52px"android:text="-"android:layout_x="240dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/mult_sign"android:layout_width="73px"android:layout_height="52px"android:text="*"android:layout_x="240dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/dev_sign"android:layout_width="73px"android:layout_height="52px"android:text="÷"android:layout_x="240dp"android:layout_y="202dp"/> <Buttonandroid:id="@+id/number3"android:layout_width="73px"android:layout_height="52px"android:text="3"android:layout_x="170dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/number6"android:layout_width="73px"android:layout_height="52px"android:text="6"android:layout_x="170dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/equal_sign"android:layout_width="73px"android:layout_height="52px"android:text="="android:layout_x="167dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/number1"android:layout_width="73px"android:layout_height="52px"android:text="1"android:layout_x="10dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/number5"android:layout_width="73px"android:layout_height="52px"android:text="5"android:layout_x="90dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/number4"android:layout_width="73px"android:layout_height="52px"android:text="4"android:layout_x="10dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/number9"android:layout_width="73px"android:layout_height="52px"android:text="9"android:layout_x="170dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number8"android:layout_width="73px"android:layout_height="52px"android:text="8"android:layout_x="90dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number7"android:layout_width="73px"android:layout_height="52px"android:text="7"android:layout_x="10dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number2"android:layout_width="73px"android:layout_height="52px"android:text="2"android:layout_x="90dp"android:layout_y="322dp"/><Buttonandroid:id="@+id/clear_sign"android:layout_width="138px"android:layout_height="wrap_content"android:text="C"android:layout_x="174dp"android:layout_y="148dp"/></AbsoluteLayout>主代码package my.calu;import java.util.ArrayList;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;//package expression;import java.util.ArrayList;import java.util.Stack;import java.util.regex.Matcher;import java.util.regex.Pattern;public class Main extends Activity implements OnClickListener {private static final char Str = 0;private Buttonnumber0,number1,number2,number3,number4,number5,number6,number7,numbe r8,number9;private Buttonbinary_sign,sexadecimal_sign,clear_sign,point_sign,add_sign,sub_sign, mult_sign,dev_sign,equal_sign;private EditText edittext;private String buffer="";private boolean first_is_number=false ,after_equal=false,flage_10zhijing=true,flage_16zhijing=true;//初始化事件public void init() {this.edittext=(EditText) findViewById(R.id.editview);this.edittext.setOnClickListener(this);this.number0=(Button) findViewById(R.id.number0);this.number0.setOnClickListener(this);this.number1=(Button) findViewById(R.id.number1);this.number1.setOnClickListener(this);this.number2=(Button) findViewById(R.id.number2);this.number2.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number2);this.number0.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number3);this.number3.setOnClickListener(this);this.number4=(Button) findViewById(R.id.number4);this.number4.setOnClickListener(this);this.number5=(Button) findViewById(R.id.number5);this.number5.setOnClickListener(this);this.number6=(Button) findViewById(R.id.number6);this.number6.setOnClickListener(this);this.number7=(Button) findViewById(R.id.number7);this.number7.setOnClickListener(this);this.number8=(Button) findViewById(R.id.number8);this.number8.setOnClickListener(this);this.number9=(Button) findViewById(R.id.number9);this.number9.setOnClickListener(this);this.point_sign=(Button) findViewById(R.id.point_sign);this.point_sign.setOnClickListener(this);this.equal_sign=(Button) findViewById(R.id.equal_sign);this.equal_sign.setOnClickListener(this);this.add_sign=(Button) findViewById(R.id.add_sign);this.add_sign.setOnClickListener(this);this.sub_sign=(Button) findViewById(R.id.sub_sign);this.sub_sign.setOnClickListener(this);this.mult_sign=(Button) findViewById(R.id.mult_sign);this.mult_sign.setOnClickListener(this);this.dev_sign=(Button) findViewById(R.id.dev_sign);this.dev_sign.setOnClickListener(this);this.clear_sign=(Button) findViewById(R.id.clear_sign);this.clear_sign.setOnClickListener(this);this.binary_sign=(Button) findViewById(R.id.binary_sign);this.binary_sign.setOnClickListener(this);this.sexadecimal_sign=(Button)findViewById(R.id.sexadecimal_sign);this.sexadecimal_sign.setOnClickListener(this);}//判断字符串是否为全为0-9的整形数public boolean is10Numeric(String str){Pattern pattern = pile("[0-9]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断字符串是否为全为0-1的整形数public boolean is2Numeric(String str){Pattern pattern = pile("[0-1]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断字符串是否为全为0-f的整形数public boolean is16Numeric(String str){Pattern pattern = pile("[0-f]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断最后一位和第一位是否为数字public boolean isnumber ( String s) {int i=s.length();char c=s.charAt(i-1);char k=s.charAt(0);// System.out.println("---firstnumber--"+k);// System.out.println("---70c=charAt--"+c);if(s.equals(null)) {return false;}if((c >= '0' && c <= '9')&& (k >='0' && k <= '9') ){return true;}elsereturn false;}//判断是否有运算符public boolean have_signal(String s){after_equal=false;boolean have=s.contains("+");if(s.contains("+")||s.contains("-") || s.contains("*") || s.contains("/"))return true;elsereturn false;}//-------堆栈算法---------public void deal_equal (String s){// System.out.println("Hello World!");//中缀 => 后缀表达式SSSssss// String s = "8-3*5"; //中缀String S = ""; //后缀char[] Operators = new char[s.length()];int Top = -1;for (int i = 0; i < s.length(); i++){char C = s.charAt(i);// System.out.print(C);switch(C){case' ' :b reak;case'+' : //操作符case'-' :while (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){Operators[++Top] = c; //push Operatorbreak;}else{S = S + c;}}O perators[++Top] = C; //push OperatorS += " ";break;case'*' : //操作符case'/' :w hile (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){Operators[++Top] = c; //push Operatorbreak;}else{if (c == '+' || c == '-'){Operators[++Top] = c; //push Operatorbreak;}else{S = S + c;}}}O perators[++Top] = C; //push OperatorS += " ";b reak;case'(' : //操作符Operators[++Top] = C;S += " ";break;case')' : //操作符while (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){break;}else{S = S + c;}}S += " ";break;default : //操作数S = S + C;break;}}while (Top >= 0){S = S + Operators[Top--]; //pop Operator}// System.out.print(Operators);// System.out.println(S); //后缀//后缀表达式计算double[] Operands = new double[S.length()];// System.out.println(S.length());double x, y, v;Top = - 1;String Operand = "";for (int i = 0; i < S.length(); i++){char c = S.charAt(i);if ((c >= '0' && c <= '9') || c == '.'){Operand += c;// System.out.print(Operand+" ");}if ((c == ' ' && Operand != "") || i == S.length()) {Operands[++Top] = ng.Double.parseDouble(Operand) ; //push OperandsOperand = "";}if (c == '+' || c == '-' || c == '*' || c == '/'){if ((Operand != "")){Operands[++Top] = ng.Double.parseDouble(Operand) ;//push Operands// System.out.println(Operators);Operand = "";}y = Operands[Top--]; //pop 双目运算符的第二操作数 (后进先出)注意操作数顺序对除法的影响x = Operands[Top--]; //pop 双目运算符的第一操作数switch (c){case'+' :v = x + y;break;case'-' :v = x - y;break;case'*' :v = x * y;break;case'/' :v = x / y; // 第一操作数 / 第二操作数注意操作数顺序对除法的影响break;default :v = 0;break;}Operands[++Top] = v; //push 中间结果再次入栈}}v = Operands[Top--]; //pop 最终结果// System.out.println("-------result-------"+v);String result=v+"";this.edittext.setText(result);}/** Called when the activity is first created. *///------------------函数入口--wangwei-------------//@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.main);this.init();//跳转// Intent intent=new Intent();//// Intent intent=TwoActivity.this.getlntent(); // Bundle bundle=intent.getExtras();// String name=bundle.getString(buffer);//}//触发事件后的动作// @Overridepublic void onClick(View v) {try {// TODO Auto-generated method stubif(v.getId()==this.number0.getId()) {buffer=buffer+0;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number1.getId()) { buffer=buffer+1;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number2.getId()) { buffer=buffer+2;this.edittext.setText(buffer);}else if(v.getId()==this.number3.getId()) { buffer=buffer+3;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number4.getId()) { buffer=buffer+4;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number5.getId()) { buffer=buffer+5;this.edittext.setText(buffer);}else if(v.getId()==this.number6.getId()) {buffer=buffer+6;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number7.getId()) {buffer=buffer+7;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number8.getId()) {buffer=buffer+8;this.edittext.setText(buffer);first_is_number=true;}else if(v.getId()==this.number9.getId()) {buffer=buffer+9;this.edittext.setText(buffer);// first_is_number=true;//---------------2进制的转换-----------}else if(v.getId()==this.binary_sign.getId()) { boolean is10=is10Numeric(buffer);boolean is2=is2Numeric(buffer);if(is10&&(flage_10zhijing==true)){int num=Integer.parseInt(buffer);flage_10zhijing=false;buffer=Integer.toBinaryString(num)+"" ;System.out.println("is10"+flage_10zhijing);}else if (is2&&(flage_10zhijing==false)){flage_10zhijing=true;buffer=Integer.valueOf(buffer,2).toString()+"" ;}else {//System.out.println(" 不是10进制也不是二进制");//buffer="0000000000";}this.edittext.setText(buffer);//----------------16进制的转换--------------}else if(v.getId()==this.sexadecimal_sign.getId()) { boolean is16=false,is10=false;is16=is16Numeric(buffer);is10=is10Numeric(buffer);System.out.println("is16 --- "+is16);System.out.println("flage_16zhijing"+flage_16zhijing);if(is10&&flage_16zhijing){int num=Integer.parseInt(buffer);flage_16zhijing=false;buffer=Integer.toHexString(num) +"" ;System.out.println("jinruis10 "+flage_16zhijing);}else if ((is16==true)&&(flage_16zhijing==false)){System.out.println("jinruis16 "+flage_16zhijing);flage_16zhijing=true;buffer=Integer.valueOf(buffer,16).toString() +"" ;//buffer="0000000000";}else {//System.out.println(" 不是16进制也不是1 0进制");//buffer="0000000000";}this.edittext.setText(buffer);//-------------四则运算-------------}else if(v.getId()==this.point_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+".";this.edittext.setText(buffer);}else if(v.getId()==this.sub_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"-";this.edittext.setText(buffer);}else if(v.getId()==this.mult_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"*";this.edittext.setText(buffer);}else if(v.getId()==this.dev_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"/";this.edittext.setText(buffer);}else if(v.getId()==this.add_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber){buffer=buffer+"+";this.edittext.setText(buffer);}else {//buffer="000000000000";this.edittext.setText(buffer);}//-------------------清除-------------------}else if(v.getId()==this.clear_sign.getId()) {// if(after_equal) {// int len=buffer.length();// if(len >=1) {// buffer= (String )buffer.subSequence(0, len-1); // }//// } else {// buffer="";// }buffer="";this.edittext.setText(buffer);//--------------计算结果------------------------}else if(v.getId()==this.equal_sign.getId()) {boolean isnumber;if(buffer.equals(null)) {buffer=" ";this.edittext.setText(buffer);}else {isnumber= isnumber ( buffer);boolean have_signal=have_signal(buffer);if(isnumber&&have_signal){after_equal=true;deal_equal(buffer);}}}} catch (Exception e) {// TODO: handle exception}// System.out.println("-----327------"+buffer);}}。

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