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Android应用开发--MP3简单音乐播放器点击列表会进入播放的Activity,在这个Activity会接收到从前面的Activity传来的数据，在通过这些数据来启动服务来播放音乐，整个过程很简单，需要注意的是我们要接收的数据是哪些内容，还有我们向Service要传什么样的数据，这是根据自己的开发思路和需求来决定的，等一下你们会看到小鬼到底往Service传了些什么东西，然而这些数据到底起什么作用，需要慢慢去体会，因为这是需要一点一点去调试的。
好了，下面贴一下整个Activity的实现代码，主要是播放的各种状态的实现，因为这个音乐播放器并没有完全开发完，所以朋友们需要弄清楚这一点。
如果对代码的实现有不清楚的，可以给小鬼留言，小鬼有空一定给大家解答。
效果如下：代码如下：package com.anjovo.as.chapter10.exam01;import java.io.IOException;import android.media.AudioManager;import android.media.MediaPlayer;import .Uri;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo; import android.view.Menu;import android.view.MenuItem;import android.view.SubMenu;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;public class MusicPlayerActivity extends Activity {protected static final int REQUEST_CODE = 1;private Button btnPlay,btnPause,baStop,back;private ImageView image;private TextView text;private MediaPlayer player;int position = 0;//声明一个变量判断是否为播放，默认为falseprivate boolean isPaused = false,Media=false;@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);setContentView(yout.activity_music_player);btnPlay = (Button) findViewById(R.id.bt_play);btnPause = (Button) findViewById(R.id.bt_pause);baStop = (Button) findViewById(R.id.bt_stop);back = (Button) findViewById(R.id.bt_back);image = (ImageView)findViewById(R.drawable.ic_launcher);text = (TextView) findViewById(R.id.text);image = (ImageView) findViewById(R.drawable.fengcun);registerForContextMenu(baStop);//注册，让这个bastop将会启用上下文菜单text.setText("歌词下载错误！");final Intent serintent = newIntent(this,newActivity.class);btnPause.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubstartActivityForResult(serintent,REQUEST_CODE);}});back.setOnClickListener(new Button.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubfinish();if(Media==true){player.stop();player.release();}}});}public void BlooeanMedia(){if(Media==true){player.release();}}public void Player(MediaPlayer player){ try {if(player!=null){player.stop();}player.prepare();player.start();isPaused = true;Media=true;Toast.makeText(this, "音乐播放中...", Toast.LENGTH_LONG).show();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Overridepublic boolean onContextItemSelected(MenuItem item) { // TODO Auto-generated method stubswitch(item.getItemId()){case 1:/** 用户点击了Id为“1”的子项，在这里编写处理代码*/BlooeanMedia();player = MediaPlayer.create(this,R.raw.wintersecret);MediaPlayer(player);Player(player);text.setText("周传雄-冬天的秘密...");break;case 2:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/BlooeanMedia();player = MediaPlayer.create(this, R.raw.after);MediaPlayer(player);Player(player);text.setText("庄心研-以后的以后...");break;case 3:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/BlooeanMedia();player = MediaPlayer.create(this, R.raw.baby);MediaPlayer(player);Player(player);text.setText("张悬-宝贝...");break;case 4:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/BlooeanMedia();player = MediaPlayer.create(this, R.raw.lovegirl);MediaPlayer(player);Player(player);text.setText("张赫宣-你是我心爱的姑娘...");break;case 5:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 5被选择",Toast.LENGTH_LONG).show();break;case 6:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 6被选择",Toast.LENGTH_LONG).show();break;case 7:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 7被选择",Toast.LENGTH_LONG).show();break;case 8:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 8被选择",Toast.LENGTH_LONG).show();break;case 9:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 9被选择",Toast.LENGTH_LONG).show();break;case 10:/** 用户点击了Id为“2”的子项，在这里编写处理代码*/Toast.makeText(this, "Item 10被选择",Toast.LENGTH_LONG).show();break;}return super.onOptionsItemSelected(item);}private void MediaPlayer(final MediaPlayer player) { // TODO Auto-generated method stub//增加播放音乐按钮的事件btnPlay.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubtry {if(player!=null){if(isPaused==false){player.start();isPaused=true;Toast.makeText(getApplicationContext(), "音乐播放中...", Toast.LENGTH_LONG).show();}else if(isPaused==true){player.pause();//暂停isPaused=false;Toast.makeText(getApplicationContext(), "音乐暂停中...", Toast.LENGTH_LONG).show();}}player.prepare();//同步地准备播放或回放player.start();//开始播放} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}});//播放完毕player.setOnCompletionListener(newMediaPlayer.OnCompletionListener() {@Overridepublic void onCompletion(MediaPlayer arg0) {// TODO Auto-generated method stubtry{//释放dtmimi.mp3这个资源，让它可被其它播放器使用player.release();//释放MediaPlayerToast.makeText(getApplicationContext(), "音乐播放结束!", Toast.LENGTH_LONG).show();text.setText("");}catch(Exception e){Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();e.printStackTrace();}}});//播放出错的处理player.setOnErrorListener(newMediaPlayer.OnErrorListener() {@Overridepublic boolean onError(MediaPlayer arg0, int arg1, int arg2) {// TODO Auto-generated method stubtry{//发生错误时也释放资源player.release();Toast.makeText(getApplicationContext(), "播放发生异常！", Toast.LENGTH_LONG).show();}catch(Exception e){Toast.makeText(getApplicationContext(),e.toString(), Toast.LENGTH_LONG).show();e.printStackTrace();}return false;}});}@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {// TODO Auto-generated method stubsuper.onCreateContextMenu(menu, v, menuInfo);menu.add(Menu.NONE, 1, Menu.NONE, "周传雄-冬天的秘密");menu.add(Menu.NONE, 2, Menu.NONE, "庄心研-以后的以后");menu.add(Menu.NONE, 3, Menu.NONE, "张悬-宝贝");menu.add(Menu.NONE, 4, Menu.NONE, "张赫宣-你是我心爱的姑娘");menu.add(Menu.NONE, 5, Menu.NONE, R.string.menu_item5);//将Item6设置为子菜单SubMenu subMenu = menu.addSubMenu(Menu.NONE, 6, Menu.NONE, R.string.menu_item6);subMenu.setHeaderIcon(R.drawable.ic_launcher);subMenu.setIcon(R.drawable.ic_launcher);subMenu.setHeaderTitle("子菜单");subMenu.add(Menu.NONE, 7, Menu.NONE,R.string.menu_item7);subMenu.add(Menu.NONE, 8, Menu.NONE,R.string.menu_item8);subMenu.add(Menu.NONE, 9, Menu.NONE,R.string.menu_item9);subMenu.add(Menu.NONE, 10, Menu.NONE,R.string.menu_item10);}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.onActivityResult(requestCode, resultCode, data);if(requestCode==REQUEST_CODE&&resultCode==RESULT_OK){ if(data!=null){//通过data参数处理返回信息String info = data.getData().toString();Uri myUri = Uri.parse(info);//将传回来的路径放在myUri中BlooeanMedia();player = new MediaPlayer();MediaPlayer(player);player.setAudioStreamType(AudioManager.STREAM_MUSIC);try {player.setDataSource(getApplicationContext(),myUri);//按地址播放player.prepare();player.start();isPaused = true;Media=true;Toast.makeText(this, "音乐播放中...", Toast.LENGTH_LONG).show();} catch (IllegalArgumentException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SecurityException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}else{Toast.makeText(this, "无返回信息",Toast.LENGTH_SHORT).show();}}}}package com.anjovo.as.chapter10.exam01;import java.io.File;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.content.Intent;import .Uri;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.Toast;/*** 使用一个包含String的List作为ListView的数据源，由于要在匿名内部类的方法中* 使用它，故将其定义为类的属性*/public class newActivity extends Activity{private List<String> dataList;private List<String> datauri;private String m_path;@Overrideprotected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(yout.array_adapter_acyivity);ListView list = (ListView) findViewById(R.id.list);dataList = new ArrayList<String>();datauri = new ArrayList<String>();m_path = new String("mnt/sdcard/");search(m_path, ".mp3", dataList,datauri);//定义一个ArrayAdapter，将数据源——dataList中的内容添加到这个ArrayAdapter//中，第二个参数指每一项将使用的界面布局final ArrayAdapter<String> adapter = newArrayAdapter<String>(this, yout.array_adapter_item, dataList);list.setAdapter(adapter);//将ArrayAdapter填充到ListView//处理用户单击选择的事件list.setOnItemClickListener(newAdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {// TODO Auto-generated method stubIntent intent = new Intent();String url = datauri.get(position);intent.setData(Uri.parse(url));setResult(RESULT_OK, intent);finish();}});//处理用户长按事件list.setOnItemLongClickListener(newAdapterView.OnItemLongClickListener() {@Overridepublic boolean onItemLongClick(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(),dataList.get(posit ion)+"删除成功！", Toast.LENGTH_LONG).show();//用户长按一项时，删除这一项内容dataList.remove(position);//通知Adapter的观察者数据源改变了，界面内容也得发生改变adapter.notifyDataSetChanged();return true; //返回true表示长按}});}}布局文件如下：<RelativeLayoutxmlns:android="/apk/res/and roid"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:paddingBottom="@dimen/activity_vertical_margi n"android:paddingLeft="@dimen/activity_horizontal_margi n"android:paddingRight="@dimen/activity_horizontal_marg in"android:paddingTop="@dimen/activity_vertical_margin"tools:context=".MusicPlayerActivity"><Buttonandroid:id="@+id/bt_pause"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_alignParentLeft="true"android:layout_marginBottom="14dp"android:text="列表"/><Buttonandroid:id="@+id/bt_play"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBaseline="@+id/bt_pause"android:layout_alignBottom="@+id/bt_pause"android:layout_centerHorizontal="true"android:text="播放"/><Buttonandroid:id="@+id/bt_back"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignLeft="@+id/bt_stop"android:layout_alignParentTop="true"android:text="返回"/><Buttonandroid:id="@+id/bt_stop"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignBaseline="@+id/bt_play"android:layout_alignBottom="@+id/bt_play"android:layout_toRightOf="@+id/image"android:text="选择"/><ImageViewandroid:id="@+id/image"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_above="@+id/text"android:layout_marginBottom="16dp"android:layout_toRightOf="@+id/bt_pause"android:src="@drawable/fengcun"/><TextViewandroid:id="@+id/text"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_above="@+id/bt_play"android:layout_centerHorizontal="true"android:layout_marginBottom="48dp"android:text="."/> </RelativeLayout>。
基于an droid平台的音乐播放器开发实验报告学生姓名：_______ 温从林 _________________学号: ___________________________________班级：计自1201 _____________第一章引言1.1项目背景当今社会的生活节奏越来越快，人们对手机的要求也越来越高，由于手机市场发展迅速，使得手机操作系统也出现了不同各类，现在的市场上主要有三个手机操作系统，Win dowsmobile，symbia n，以及谷歌的An droid操作系统，其中占有开放源代码优势的An droid系统有最大的发展前景。
那么能否在手机上拥有自己编写的个性音乐播放器呢？能的，谷歌An droid系统就能做到。
本文的音乐播放器就是基于谷歌An droid手机平台的播放器。
An droid :是谷歌于2007年公布的开放式源代码手机系统，它的开放性就优于其它封闭式的手机系统，因此，任何人都可能根据自己的喜好将手机系统中的所有功能重新编写。
这使得越来越多的人关注这个操作系统。
本次作品音乐播放器就是基于An droid平台的。
1.2编写目的现今社会生活紧张，而欣赏音乐是其中最好的舒缓压力的方式之一，本项目的目的是开发一个可以播放主流音乐文件格式的播放器，本设计实现的主要功能是播放Mp3 Wav多种格式的音乐文件，并且能够控制播放，暂停，停止，播放列等基本播放控制功能，界面简明，操作简单。
本项目是一款基于An droid手机平台的音乐播放器，使An droid手机拥有个性的多媒体播放器，使手机显得更生动灵活化，与人们更为接近，让手机主人随时随地处于音乐视频的旋律之中。
使人们的生活更加多样化。
也使设计者更加熟练An droid的技术和其它在市场上的特点。
1.3开发环境Eclipse、An droid SDK 320第二章系统需求分析2.1功能需求（用例图分析）根据项目的目标，我们可获得项目系统的基本需求，以下从不同角度来描述系统的需求，并且使用用例图来描述，系统的功能需求，我们分成四部分来概括，即播放器的基本控制需要，播放列表管理需求，播放器友好性需求和播放器扩展卡需求。
Androidstudio简单的音乐播放器实现JAVA文件：MainActivity.java，menuActivity.java，Music.java，PreActivity.javaXML文件：activity_main.xml，activity_pre.xml，activity_menu.xml在PreActivity.java文件中，程序主要执行开启线程，实现开启软件进入欢迎界面，并在1秒后自动跳转到音乐播放器主界面，界面在activity_pre.xml文件中实现。
PreActivity.javapublic class PreActivity extends Activity {Handler handler=new Handler(){public void handleMessage(Message msg){if(msg.what==250){Intent intent=new Intent(PreActivity.this,MainActivity.class);startActivity(intent);finish();}};};@Overrideprotected void onCreate(Bundle savedInstanceState){//TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(yout.activity_pre); //加载布局WaitThread thread=new WaitThread(); //开启线程thread.start();}public class WaitThread extends Thread{ //创建线程@Overridepublic void run(){//TODO Auto-generated method stubtry{Thread.sleep(1000);}catch (InterruptedException e){//TODO Auto-generated catch blocke.printStackTrace();}Message message=new Message();message.what=250;message.arg1=1;handler.sendMessage(message);}}}activity_pre.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android=""android:layout_width="400dp"android:layout_height="800dp"android:background="#ffffff"android:orientation="vertical"android:weightSum="1"><ImageViewandroid:src="@drawable/welcome"android:layout_width="408dp"android:layout_height="451dp"android:layout_weight="0.77" /></LinearLayout>主要功能实现MainActivity.java,音乐播放器主界面activity_main.xml。
package com.Aina.Android;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FilenameFilter;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import java.util.TreeMap;import android.app.Activity;import android.app.AlertDialog;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.app.AlertDialog.Builder;import android.content.ActivityNotFoundException; import android.content.DialogInterface;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.media.MediaPlayer;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.KeyEvent;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ListView;import android.widget.ScrollView;import android.widget.SeekBar;import android.widget.TextView;import android.widget.Toast;public class ActivityMain extends Activity{ /** Called when the activity is first created. */private ViewlrcKLOK viewlrcKLOK;private MediaPlayer mMediaPlayer = null;private SeekBar mSeekBar = null;private ListView mListView = null;private ImageButton mLastbtn = null;private ImageButton mStartbtn = null;private ImageButton mPausebtn = null;private ImageButton mStopbtn = null;private ImageButton mNextbtn = null;private TextView mTextView = null;private ScrollView scrollview =null;private ImageView header =null;private TextView lrc = null;private List<String> mMusiclist = null;private int mCurrent = 0;private int count = 0;private boolean isrun = false;private boolean isauto = false;private static final String PA TH = "/sdcard/mp3/";private static TreeMap<Integer, lrcObject> lrc_map;private static int lrc_timeend =0;private long KeyDownOldTime =0;private int KeyDownCount =0;private String songName ="";private String songAuthor ="";private NotificationManager mNotificationManager;private static int NOTIFICA TIONS_ID = yout.main;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.main);mListView = (ListView) this.findViewById(R.id.lv_music);mSeekBar = (SeekBar) this.findView ById(R.id.SeekBar01);mTextView = (TextView) this.findV iewById(R.id.mTextV iew);viewlrcKLOK = (ViewlrcKLOK) this.findView ById(R.id.lrc_view);lrc = (TextView) this.findViewById(R.id.lrc);scrollview = (ScrollView) this.findView ById(R.id.scrollview);mLastbtn = (ImageButton) this.findView ById(R.id.imgbtn_last);mStartbtn = (ImageButton) this.findViewById(R.id.imgbtn_start);mPausebtn = (ImageButton) this.findViewById(R.id.imgbtn_pause);mStopbtn = (ImageButton) this.findViewById(R.id.imgbtn_stop);mNextbtn = (ImageButton) this.findViewById(R.id.imgbtn_next);header = (ImageView) this.findViewById(R.id.header);mMusiclist = new ArrayList<String>();mMediaPlayer = new MediaPlayer();lrc_map = new TreeMap<Integer, lrcObject>();viewlrcKLOK.SetlrcContent("歌词",0,0,"......",0);lrc_timeend = 0;lrc.setV isibility(View.GONE);mNotificationManager = (NotificationManager) getSystemService(NOTIFICA TION_SERVICE);mMediaPlayer.setOnPreparedListener(prepareListener);mMediaPlayer.setOnCompletionListener(CompletionListener);mMediaPlayer.setOnErrorListener(ErrorListener);// 开始按钮mStartbtn.setOnClickListener(new ImageButton.OnClickListener() {@Overridepublic void onClick(View v) {//lrc.setV isibility(View.GONE); //控件隐藏PlayMusic(PA TH + mMusiclist.get(mCurrent));}});// 下一首mNextbtn.setOnClickListener(new ImageButton.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubNextMusic();}});// 上一首mLastbtn.setOnClickListener(new ImageButton.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubLastMusic();}});// 暂停mPausebtn.setOnClickListener(new ImageButton.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubisrun = true;isauto = false;mPausebtn.setVisibility(V iew.GONE);// 隐藏暂停按钮mStartbtn.setV isibility(View.VISIBLE);// 显示启动按钮// 是否正在播放if (mMediaPlayer.isPlaying()) {viewlrcKLOK.Stop();mMediaPlayer.pause();}}});// 停止mStopbtn.setOnClickListener(new ImageButton.OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubStopMusic();}});mListView.setOnItemClickListener(new ListView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, V iew arg1, int arg2, long arg3) {mCurrent = arg2;StopMusic();PlayMusic(PA TH + mMusiclist.get(mCurrent));}});mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar,int progress, boolean fromUser) {if (!isauto) {mMediaPlayer.seekTo(progress);}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {isauto = false;}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {isauto = true;}});this.MusicList();}private void setPlayint(String tickerText, String title, String content,int drawable) {Notification notification = new Notification(drawable, tickerText,System.currentTimeMillis());PendingIntent contentIntent = PendingIntent.getActivity(this, 0,new Intent(this, ActivityMain.class), 0);notification.setLatestEventInfo(this, title, content, contentIntent);mNotificationManager.notify(NOTIFICA TIONS_ID, notification);}private MediaPlayer.OnPreparedListener prepareListener = new MediaPlayer.OnPreparedListener(){public void onPrepared(MediaPlayer mp){isrun = true;setPlayint(songAuthor,songName, songAuthor, R.drawable.icon);lrc_timeend = 0;viewlrcKLOK.SetlrcContent("准备好",0,0,"go,go,go..",0);viewlrcKLOK.Star();count = mMediaPlayer.getDuration();Log.i("TAG-count", count + "");mSeekBar.setMax(count);// 设置最大值.mTextView.setText("当前播放歌曲:" + mMusiclist.get(mCurrent));mp.start(); //开始播放//Toast.makeText(ActivityMain.this, "开始播放",Toast.LENGTH_SHORT).show();myHandler.sendEmptyMessage(PROGRESS_CHANGED);}};//视频播放完成private MediaPlayer.OnCompletionListener CompletionListener=new MediaPlayer.OnCompletionListener(){@Overridepublic void onCompletion(MediaPlayer arg0) {mMediaPlayer.stop();isauto = true;mSeekBar.setProgress(0);viewlrcKLOK.SetlrcContent("准备好",0,0,"... ...",0);viewlrcKLOK.Stop();//Toast.makeText(ActivityMain.this, "播放完成:",Toast.LENGTH_SHORT).show();NextMusic();}};//播放时发现错误private MediaPlayer.OnErrorListener ErrorListener=new MediaPlayer.OnErrorListener(){ @Overridepublic boolean onError(MediaPlayer mp, int what, int extra) {// TODO Auto-generated method stubmMediaPlayer.stop();Toast.makeText(ActivityMain.this, "发现错误:-错误编号:"+what,Toast.LENGTH_SHORT).show();return true;}};public void PlayMusic(String path) {try {String lrcpath = path;//装载歌词lrcpath = lrcpath.substring(0,lrcpath.length()-4)+".lrc";this.lrc.setText(read(lrcpath));//Toast.makeText(this,"打开",Toast.LENGTH_SHORT).show();//装载头像String headerFile = path.substring(PA TH.length());int pos1 = headerFile.indexOf("-");int pos2 = headerFile.indexOf(".");if (pos1>=0){songName = headerFile.substring(pos1+1,pos2);headerFile = headerFile.substring(0,pos1);songAuthor = headerFile.trim();}headerFile = PA TH+"pic/"+headerFile.trim()+".jpg";//Toast.makeText(this, headerFile, Toast.LENGTH_SHORT).show();File myFile = new File(headerFile);if (myFile.exists()){Bitmap bm = BitmapFactory.decodeFile(headerFile);header.setImageBitmap(bm);}else{Bitmap bm = BitmapFactory.decodeResource(this.getResources(),R.drawable.back4);header.setImageBitmap(bm);}mStartbtn.setV isibility(View.GONE);// 隐藏启动按钮mPausebtn.setVisibility(V iew.VISIBLE);// 显示暂停按钮if (!isrun) {mMediaPlayer.reset();// 重置mMediaPlayer.setDataSource(path);// 设置数据源mMediaPlayer.prepare();// 准备} else {mMediaPlayer.start();// 暂停之后接着播放viewlrcKLOK.Star();}isauto = true;} catch (Exception ex) {this.ShowDialog("播放音乐异常:" + ex.getMessage());}}//创建一个消息处理private final static int PROGRESS_CHANGED = 0;private final static int HIDE_CONTROLER = 1;private final static int VIDEO_READY =3;Handler myHandler = new Handler(){@Overridepublic void handleMessage(Message msg) {switch(msg.what){case VIDEO_READY:break;case PROGRESS_CHANGED:{int nowTime = mMediaPlayer.getCurrentPosition();if (nowTime<count){mSeekBar.setProgress(nowTime);mSeekBar.invalidate();if (nowTime>lrc_timeend && isrun){//查找歌词Iterator<Integer> iterator = lrc_map.keySet().iterator();while(iterator.hasNext()) {Object ob =iterator.next();lrcObject val = (lrcObject)lrc_map.get(ob);if (nowTime>val.begintime){lrcObject val_1 = new lrcObject();val_1.begintime = 0;val_1.lrc ="...";val_1.timeline = 0;if (iterator.hasNext()){Object ob_1 =iterator.next();val_1 = (lrcObject)lrc_map.get(ob_1);}lrc_timeend = val_1.begintime+val_1.timeline;viewlrcKLOK.SetlrcContent(val.lrc,val.timeline,val_1.begintime-val.begintime-val.timeline, val_1.lrc,val_1.timeline);viewlrcKLOK.invalidate();}}}nowTime/=1000;int minute = nowTime/60;int hour = minute/60;int second = nowTime%60;minute %= 60;//mTextView.setText(String.format("%02d",nowTime));mTextView.setText(String.format("%02d:%02d:%02d", hour,minute,second));}sendEmptyMessage(PROGRESS_CHANGED);}break;case HIDE_CONTROLER:break;}super.handleMessage(msg);}};public void NextMusic() {int num = mMusiclist.size();if (++mCurrent >= num) {mCurrent = 0;}StopMusic();PlayMusic(PA TH + mMusiclist.get(mCurrent));}public void LastMusic() {int num = mMusiclist.size();if (--mCurrent < 0) {mCurrent = num - 1;}StopMusic();PlayMusic(PA TH + mMusiclist.get(mCurrent));}@Overrideprotected void onPause() {super.onPause();/*Dialog dialog = new AlertDialog.Builder(this).setTitle("对话框标题") .setIcon(R.drawable.icon).setMessage("登陆对话框")// 设置对话框显示一个单选的list.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubfinish();}}).setNeutralButton("退出", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}}).create();dialog.show();*/setPlayint(songAuthor,songName, songAuthor, R.drawable.icon);}/*** 销毁*/@Overrideprotected void onDestroy() {isauto = false;if (mMediaPlayer.isPlaying()) {mMediaPlayer.stop();// 停止}mMediaPlayer.reset();mMediaPlayer.release();super.onDestroy();}protected void dialog() {AlertDialog.Builder builder = new Builder(ActivityMain.this);builder.setMessage("确定要退出吗?");builder.setTitle("提示");builder.setPositiveButton("确认",new android.content.DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();mNotificationManager.cancel(NOTIFICA TIONS_ID);android.os.Process.killProcess(android.os.Process.myPid());}});builder.setNegativeButton("取消",new android.content.DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {onPause();dialog.dismiss();}});builder.create().show();}@Overridepublic boolean onKeyDown(int keyCode,KeyEvent event){if (keyCode==79)//耳机键{long time = System.currentTimeMillis();if ((time-KeyDownOldTime)/1000>5)KeyDownCount = 0;KeyDownCount++;Toast.makeText(this, "按键次数:"+event.getRepeatCount()+"所用时间:"+(time-KeyDownOldTime)/1000, Toast.LENGTH_SHORT).show();KeyDownOldTime = time;}else if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {dialog();return true;}return super.onKeyDown(keyCode, event);/*if (keyCode == KeyEvent.KEYCODE_BACK) {PackageManager pm = getPackageManager();ResolveInfo homeInfo = pm.resolveActivity(new Intent(Intent.ACTION_MAIN).addCategory(Intent.CA TEGORY_HOME), 0);ActivityInfo ai = homeInfo.activityInfo;Intent startIntent = new Intent(Intent.ACTION_MAIN);startIntent.addCategory(Intent.CA TEGORY_LAUNCHER);startIntent.setComponent(new ComponentName(ai.packageName,));startActivitySafely(startIntent);return true;} elsereturn super.onKeyDown(keyCode, event);*/}void startActivitySafely(Intent intent) {intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);try {startActivity(intent);} catch (ActivityNotFoundException e) {} catch (SecurityException e) {}}public void StopMusic() {isrun = false;viewlrcKLOK.Stop();lrc_timeend = 99999;mPausebtn.setVisibility(V iew.GONE);// 隐藏暂停按钮mStartbtn.setV isibility(View.VISIBLE);// 显示启动按钮if (mMediaPlayer.isPlaying()) {mMediaPlayer.stop();// 停止}}/*** 文件过滤器** @author Aina**/class MusicFilter implements FilenameFilter {@Overridepublic boolean accept(File dir, String filename) {return (filename.endsWith(".mp3"));}}/*** 读取文件*/public static String read(String file) {TreeMap<Integer, lrcObject> lrc_read =new TreeMap<Integer, lrcObject>();String data = "";try {File saveFile=new File(file);FileInputStream stream = new FileInputStream(saveFile);// context.openFileInput(file);BufferedReader br = new BufferedReader(newInputStreamReader(stream,"GB2312"));int i = 0;while ((data = br.readLine()) != null) {data = data.replace("[","");data = data.replace("]","@");String splitdata[] =data.split("@");String lrcContenet = splitdata[splitdata.length-1];for (int j=0;j<splitdata.length-1;j++){String tmpstr = splitdata[j];tmpstr = tmpstr.replace(":",".");tmpstr = tmpstr.replace(".","@");String timedata[] =tmpstr.split("@");int m = Integer.parseInt(timedata[0]); //分int s = Integer.parseInt(timedata[1]); //秒int ms = Integer.parseInt(timedata[2]); //毫秒int currTime = (m*60+s)*1000+ms*10;lrcObject item1= new lrcObject();item1.begintime = currTime;item1.lrc = lrcContenet;lrc_read.put(currTime,item1);// 图像资源的IDi++;}}stream.close();}catch (FileNotFoundException e) {}catch (IOException e) {}/** 遍历hashmap 计算每句歌词所需要的时间*/lrc_map.clear();data ="";Iterator<Integer> iterator = lrc_read.keySet().iterator();lrcObject oldval = null;int i =0;StringBuffer sb = new StringBuffer();while(iterator.hasNext()) {Object ob =iterator.next();lrcObject val = (lrcObject)lrc_read.get(ob);if (oldval==null)oldval = val;else{lrcObject item1= new lrcObject();item1 = oldval;item1.timeline = val.begintime-oldval.begintime;lrc_map.put(new Integer(i), item1);sb.append(String.format("[%04d]-[%04d]-%s\n",item1.begintime,item1.timeline,item1.lrc));i++;oldval = val;}}data = sb.toString();return data;}/*** 播放列表*/public void MusicList() {try {File home = new File(PA TH);File[] f = home.listFiles(new MusicFilter());if (f.length > 0) {for (int i = 0; i < f.length; i++) {File file = f[i];mMusiclist.add(file.getName().toString());}ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,yout.simple_list_item_1, mMusiclist);mListView.setAdapter(adapter);}} catch (Exception ex) {this.ShowDialog("显示音乐列表异常:" + ex.getMessage());}}public void ShowDialog(String str) {new AlertDialog.Builder(this).setTitle("提示").setMessage(str).setPositiveButton("OK", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}}).show();}/*@Overridepublic void run() {// TODO Auto-generated method stubwhile (true) {try {if (isauto) {int n = mMediaPlayer.getCurrentPosition();Message msg = new Message();msg.what = n;handler.sendMessage(msg);}Thread.sleep(100);} catch (Exception ex) {ex.printStackTrace();}}}*/}第二部分package com.Aina.Android;public class lrcObject {public int begintime;public int endtime;public int timeline;public String lrc;}第三部分package com.Aina.Android;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Bitmap.Config;import android.util.AttributeSet;import android.view.View;public final class V iewlrcKLOK extends View implements Runnable { private final Paint paint;private Bitmap mBitlrcBack = null;private Bitmap mBitlrc = null;private Canvas lrc_backCanvas =null;private Canvas lrc_Canvas = null;private Canvas lrc_backNextCanvas =null;private Bitmap mBitlrcNextBack = null;private Canvas lrc_Canvas1 = null;private Bitmap mBitlrc1 = null;private int lrcWidth = 0;private int lrcWidth1 = 0;private int lrcHeight = 0;private int lrcSpeed = 100;private int lrcSpeed1 = 100;private int movex = 0;private int movex1 = 0;private int dispIndex = 0;private int mTimeduff = 0;private int DisplayWidth;//屏幕宽带private int DisplayHeight;//屏幕高度private String lrc_content="这是一个测试"; //歌词内容private String lrc_Nextcontent=""; //歌词内容private int lrc_timelen = 0;private int lrc_timelen1 = 0;private Thread ThreadKLOK =null;private int nState = 0;public V iewlrcKLOK(Context context,AttributeSet attrs) {super(context,attrs);paint = new Paint();//DisplayMetrics displayMetrics = new DisplayMetrics();//this.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);//DisplayHeight = displayMetrics.heightPixels;//DisplayWidth = displayMetrics.widthPixels;ThreadKLOK = new Thread(this);ThreadKLOK.start();}@Overridepublic void onDraw(Canvas canvas) {Rect frame = new Rect();// canvas.drawText("speed"+lrcSpeed, 2, 30, paint);if (mBitlrc==null)return;this.DrawImage(canvas, mBitlrcBack,2, 8,lrcWidth,lrcHeight,0,0);this.DrawImage(canvas, mBitlrc,2, 8,movex,lrcHeight,0,0);this.DrawImage(canvas, mBitlrcNextBack,20, lrcHeight+15,lrcWidth1,lrcHeight,0,0);this.DrawImage(canvas, mBitlrc1,20, lrcHeight+15,movex1,lrcHeight,0,0);}@Overridepublic void run() {while (!Thread.interrupted()) {try {if (nState==1){if (dispIndex==0){if (movex<lrcWidth)movex++;else{movex1 = 0;dispIndex = 1;Thread.sleep(mTimeduff);}Thread.sleep(lrcSpeed);}else{if (movex1<lrcWidth1)movex1++;Thread.sleep(lrcSpeed1);}}} catch (Exception ex) {ex.printStackTrace();Thread.currentThread().interrupt();}this.postInvalidate();}}/*** x:屏幕上的x坐标* y:屏幕上的y坐标* w:要绘制的图片的宽度* h:要绘制的图片的高度* bx:图片上的x坐标* by:图片上的y坐标** @param canvas* @param mBitmap* @param x* @param y* @param w* @param h* @param bx* @param by*/public void DrawImage(Canvas canvas, Bitmap mBitmap, int x, int y, int w, int h, int bx, int by) {Rect src = new Rect();// 图片裁剪区域Rect dst = new Rect();// 屏幕裁剪区域src.left = bx;src.top = by;src.right = bx + w;src.bottom = by + h;dst.left = x;dst.top = y;dst.right = x + w;dst.bottom = y + h;canvas.drawBitmap(mBitmap, src, dst, paint);src = null;dst = null;}public void SetlrcContent(String lrc,int tiemlen,int timeduff,String lrc_1,int timelen1) {ThreadKLOK.suspend();lrc_content = lrc;lrc_timelen = tiemlen;lrc_timelen1 = timelen1;movex = 0;movex1 = 0;dispIndex = 0;paint.setTextSize(24);Rect rect = new Rect();mTimeduff = timeduff;//返回包围整个字符串的最小的一个Rect区域paint.getTextBounds(lrc, 0, 1, rect);float strwid = paint.measureText(lrc);float strwid1 = paint.measureText(lrc_1);lrcWidth = (int)strwid;lrcWidth1 = (int)strwid1;lrcHeight = 23;if (lrc_timelen>0)lrcSpeed = (lrc_timelen/lrcWidth);elselrcSpeed = 1000;if (lrc_timelen1>0)lrcSpeed1 = (lrc_timelen1/lrcWidth1);elselrcSpeed1 = 1000;mBitlrcBack = Bitmap.createBitmap( lrcWidth,lrcHeight, Config.ARGB_8888 ); mBitlrc = Bitmap.createBitmap( lrcWidth,lrcHeight, Config.ARGB_8888 );mBitlrcNextBack = Bitmap.createBitmap(lrcWidth1,lrcHeight, Config.ARGB_8888); mBitlrc1 = Bitmap.createBitmap(lrcWidth1,lrcHeight, Config.ARGB_8888 );lrc_backCanvas = new Canvas(mBitlrcBack);lrc_Canvas = new Canvas(mBitlrc);lrc_Canvas1 = new Canvas(mBitlrc1);lrc_backNextCanvas = new Canvas(mBitlrcNextBack);/*paint.setColor(Color.GREEN);rect.top = 0;rect.left = 0;rect.right =lrcWidth;rect.bottom = lrcHeight;lrc_backCanvas.drawRect(rect, paint);*/paint.setColor(Color.WHITE);lrc_backCanvas.drawText(lrc_content, 0, 20, paint);lrc_backNextCanvas.drawText(lrc_1, 0, 20, paint);paint.setColor(Color.RED);lrc_Canvas.drawText(lrc_content, 0, 20, paint);lrc_Canvas1.drawText(lrc_1, 0, 20, paint);}public void Star(){ThreadKLOK.resume();nState = 1;}public void Stop(){ThreadKLOK.suspend();nState =0;}}。
MusicInfoController.javapackage com.yarin.android.MusicPlayer;import android.content.ContentResolver;import android.database.Cursor;import .Uri;import android.provider.MediaStore;public class MusicInfoController{private static MusicInfoController mInstance = null;private MusicPlayerApp pApp = null;public static MusicInfoController getInstance(MusicPlayerApp app){if (mInstance == null){mInstance = new MusicInfoController(app);}return mInstance;}private MusicInfoController(MusicPlayerApp app){pApp = app;}public MusicPlayerApp getMusicPlayer(){return pApp;}private Cursor query(Uri uri, String[] prjs, String selections, String[] selectArgs, String order){ ContentResolver resolver = pApp.getContentResolver();if (resolver == null){return null;}return resolver.query(uri, prjs, selections, selectArgs, order);}public Cursor getAllSongs(){return query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Audio.Media.DEFAULT_SORT_ORDER);MusicList.javapackage com.yarin.android.MusicPlayer;import android.app.ListActivity;import android.content.BroadcastReceiver;import ponentName;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.ServiceConnection;import android.database.Cursor;import android.os.Bundle;import android.os.IBinder;import android.provider.MediaStore;import android.view.View;import android.widget.Button;import android.widget.ListAdapter;import android.widget.ListView;import android.widget.SimpleCursorAdapter;import android.widget.T extView;public class MusicList extends ListActivity{private MusicPlayerService mMusicPlayerService = null;private MusicInfoController mMusicInfoController = null;private Cursor mCursor = null;private TextView mTextView = null;private Button mPlayPauseButton = null;private Button mStopButton = null;private ServiceConnection mPlaybackConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { mMusicPlayerService = ((MusicPlayerService.LocalBinder)service).getService();}public void onServiceDisconnected(ComponentName className){ mMusicPlayerService = null;}};protected BroadcastReceiver mPlayerEvtReceiver = new BroadcastReceiver() { @Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if (action.equals(MusicPlayerService.PLAYER_PREPARE_END)) {// will begin to playmTextView.setVisibility(View.INVISIBLE); mPlayPauseButton.setVisibility(View.VISIBLE);mStopButton.setVisibility(View.VISIBLE);mPlayPauseButton.setText(R.string.pause);} else if(action.equals(MusicPlayerService.PLAY_COMPLETED)){ mPlayPauseButton.setText(R.string.play);}}};public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.list_layout);MusicPlayerApp musicPlayerApp=(MusicPlayerApp)getApplication(); mMusicInfoController =(musicPlayerApp).getMusicInfoController();// bind playback servicestartService(new Intent(this,MusicPlayerService.class));bindService(new Intent(this,MusicPlayerService.class), mPlaybackConnection,Context.BIND_AUTO_CREATE);mTextView = (TextView)findViewById(R.id.show_text); mPlayPauseButton = (Button)findViewById(R.id.play_pause_btn); mStopButton = (Button) findViewById(R.id.stop_btn);mPlayPauseButton.setOnClickListener(new Button.OnClickListener() {public void onClick(View v) {// Perform action on clickif (mMusicPlayerService != null && mMusicPlayerService.isPlaying()) { mMusicPlayerService.pause();mPlayPauseButton.setText(R.string.play);} else if (mMusicPlayerService != null){mMusicPlayerService.start();mPlayPauseButton.setText(R.string.pause);}}});mStopButton.setOnClickListener(new Button.OnClickListener() {public void onClick(View v) {// Perform action on clickif (mMusicPlayerService != null ) {mTextView.setVisibility(View.VISIBLE);mPlayPauseButton.setVisibility(View.INVISIBLE);mStopButton.setVisibility(View.INVISIBLE); mMusicPlayerService.stop();}}});IntentFilter filter = new IntentFilter();filter.addAction(MusicPlayerService.PLAYER_PREPARE_END);filter.addAction(MusicPlayerService.PLAY_COMPLETED);registerReceiver(mPlayerEvtReceiver, filter);}protected void onResume() {super.onResume();mCursor = mMusicInfoController.getAllSongs();ListAdapter adapter = new MusicListAdapter(this,yout.simple_expandable_list_item_2, mCursor, new String[]{}, new int[]{});setListAdapter(adapter);}protected void onListItemClick(ListView l, View v, int position, long id) {super.onListItemClick(l, v, position, id);if (mCursor == null ||mCursor.getCount() == 0) {return;}mCursor.moveToPosition(position);String url = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));mMusicPlayerService.setDataSource(url);mMusicPlayerService.start();}/********************************************************************/class MusicListAdapter extends SimpleCursorAdapter {public MusicListAdapter(Context context, int layout, Cursor c,String[] from, int[] to) { super(context, layout, c, from, to);}public void bindView(View view, Context context, Cursor cursor) {super.bindView(view, context, cursor);TextView titleView = (TextView) view.findViewById(android.R.id.text1);TextView artistView = (TextView) view.findViewById(android.R.id.text2);titleView.setText(cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE)));artistView.setText(cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)));//int duration cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));}public static String makeTimeString(long milliSecs) {StringBuffer sb = new StringBuffer();long m = milliSecs / (60 * 1000);sb.append(m < 10 ? "0" + m : m);sb.append(":");long s = (milliSecs % (60 * 1000)) / 1000;sb.append(s < 10 ? "0" + s : s);return sb.toString();}MusicPlayerApp.java package com.yarin.android.MusicPlayer;import android.app.Application;public class MusicPlayerApp extends Application{private MusicInfoController mMusicInfoController = null;public void onCreate(){ super.onCreate();mMusicInfoController = MusicInfoController.getInstance(this); }public MusicInfoController getMusicInfoController(){return mMusicInfoController;}}MusicPlayerService.javapackage com.yarin.android.MusicPlayer;import java.io.IOException;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.Binder;import android.os.IBinder;public class MusicPlayerService extends Service{private final IBinder mBinder = new LocalBinder();private MediaPlayer mMediaPlayer = null;public static final String PLAYER_PREPARE_END = "com.yarin.musicplayerservice.prepared";public static final String PLAY_COMPLETED = "com.yarin.musicplayerservice.playcompleted";MediaPlayer.OnCompletionListener mCompleteListener = new MediaPlayer.OnCompletionListener(){public void onCompletion(MediaPlayer mp){ broadcastEvent(PLAY_COMPLETED);}};MediaPlayer.OnPreparedListener mPrepareListener = new MediaPlayer.OnPreparedListener(){public void onPrepared(MediaPlayer mp){ broadcastEvent(PLAYER_PREPARE_END);}};private void broadcastEvent(String what){Intent i = new Intent(what); sendBroadcast(i);}public void onCreate(){super.onCreate();mMediaPlayer = new MediaPlayer(); mMediaPlayer.setOnPreparedListener(mPrepareListener);mMediaPlayer.setOnCompletionListener(mCompleteListener);}public class LocalBinder extends Binder{public MusicPlayerService getService(){return MusicPlayerService.this;public IBinder onBind(Intent intent){return mBinder;}public void setDataSource(String path){try{mMediaPlayer.reset();mMediaPlayer.setDataSource(path); mMediaPlayer.prepare();}catch (IOException e){return;}catch (IllegalArgumentException e){return;}}public void start(){mMediaPlayer.start();}public void stop(){mMediaPlayer.stop();}public void pause(){mMediaPlayer.pause();public boolean isPlaying(){return mMediaPlayer.isPlaying();}public int getDuration(){return mMediaPlayer.getDuration();}public int getPosition(){return mMediaPlayer.getCurrentPosition();}public long seek(long whereto){mMediaPlayer.seekTo((int) whereto);return whereto;}}。
广州xx 学院Android 程序设计 实验报告专业班级 计算机181 实验日期__ 2021.5.18_ _ 姓 名 xx 学 号201xx 实验名称 Service 编程 指导老师__ xx _（报告内容包括：实验目的、实验设备及器材、实验步骤、实验数据、图表及曲线处理、实验小结等）。
1. 实验目的(1) 了解如何创建服务；(2) 掌握服务的两种启动方式；(3) 掌握如何使用本地服务通信。
2. 实验要求(1) 使用服务通信，实现音乐播放器功能，实现音乐的播放、暂停、继续播放、退出。
3. 实验步骤（1）导入音乐文件和界面图片之后，开始创建布局，代码如下，效果图如图1-1所示。
<ImageViewandroid :id ="@+id/iv_music"android :layout_width ="240dp"android :layout_height ="240dp"android :layout_gravity ="center_horizontal" android :layout_margin ="15dp"android :src ="@drawable/music"/><SeekBarandroid :id ="@+id/sb"android :layout_width ="match_parent"android :layout_height ="wrap_content" /><RelativeLayoutandroid :layout_width ="match_parent"android :layout_height ="wrap_content"android:paddingLeft="8dp"android:paddingRight="8dp"><TextViewandroid:id="@+id/tv_progress"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="00:00" /><TextViewandroid:id="@+id/tv_total"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:text="00:00" /></RelativeLayout><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"><Buttonandroid:id="@+id/btn_play"android:layout_width="0dp"android:layout_height="40dp"android:layout_margin="8dp"android:layout_weight="1"android:background="@drawable/btn_bg_selector"android:text="播放音乐" /><Buttonandroid:id="@+id/btn_pause"android:layout_width="0dp"android:layout_height="40dp"android:layout_margin="8dp"android:layout_weight="1"android:background="@drawable/btn_bg_selector"android:text="暂停播放" /><Buttonandroid:id="@+id/btn_continue_play"android:layout_width="0dp"android:layout_height="40dp"android:layout_margin="8dp"android:layout_weight="1"android:background="@drawable/btn_bg_selector"android:text="继续播放" /><Buttonandroid:id="@+id/btn_exit"android:layout_width="0dp"android:layout_height="40dp"android:layout_margin="8dp"android:layout_weight="1"android:background="@drawable/btn_bg_selector"android:text="退出" /></LinearLayout>图1-1 界面布局效果图（2）创建背景选择器btn_bg_selector.xml关键代码如下：<selector xmlns:android="/apk/res/android"><item android:state_pressed="true" ><shape android:shape="rectangle"><corners android:radius="3dp"/><solid android:color="#d4d4d4"/></shape></item><item android:state_pressed="false" ><shape android:shape="rectangle"><corners android:radius="3dp"/><solid android:color="#ffffff" /></shape></item></selector>（3）创建MusicService服务关键代码如下所示：public class MusicService extends Service {private MediaPlayer player;private Timer timer;public MusicService() {}@Overridepublic IBinder onBind(Intent intent) {return new MusicControl();}@Overridepublic void onCreate() {super.onCreate();player = new MediaPlayer();//创建音乐播放器对象}public void addTimer() { //添加计时器用于设置音乐播放器中的播放进度条if (timer == null) {timer = new Timer(); //创建计时器对象TimerTask task = new TimerTask() {@Overridepublic void run() {if (player == null) return;int duration = player.getDuration(); //获取歌曲总时长int currentPosition = player.getCurrentPosition();//获取播放进度Message msg = MainActivity.handler.obtainMessage();//创建消息对象//将音乐的总时长和播放进度封装至消息对象中Bundle bundle = new Bundle();bundle.putInt("duration", duration);bundle.putInt("currentPosition", currentPosition);msg.setData(bundle);//将消息发送到主线程的消息队列MainActivity.handler.sendMessage(msg);}};//开始计时任务后的5毫秒，第一次执行task任务，以后每500毫秒执行一次timer.schedule(task, 5, 500);}}class MusicControl extends Binder {public void play() {try {player.reset();//重置音乐播放器//加载多媒体文件player = MediaPlayer.create(getApplicationContext(),R.raw.music);player.start();//播放音乐addTimer(); //添加计时器} catch (Exception e) {e.printStackTrace();}}public void pausePlay() {player.pause(); //暂停播放音乐}public void continuePlay() {player.start(); //继续播放音乐}public void seekTo(int progress) {player.seekTo(progress);//设置音乐的播放位置}}@Overridepublic void onDestroy() {super.onDestroy();if (player == null) return;if (player.isPlaying()) player.stop();//停止播放音乐player.release(); //释放占用的资源player = null; //将player置为空}}（4）编写界面交互代码关键代码如下：public class MainActivity extends AppCompatActivity implementsView.OnClickListener{private static SeekBar sb;private static TextView tv_progress, tv_total;private ObjectAnimator animator;private MusicService.MusicControl musicControl;MyServiceConn conn;Intent intent;private boolean isUnbind = false;//记录服务是否被解绑@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_main);init();}private void init() {tv_progress = (TextView) findViewById(_progress);tv_total = (TextView) findViewById(_total);sb = (SeekBar) findViewById(R.id.sb);findViewById(R.id.btn_play).setOnClickListener(this);findViewById(R.id.btn_pause).setOnClickListener(this);findViewById(R.id.btn_continue_play).setOnClickListener(this);findViewById(R.id.btn_exit).setOnClickListener(this);intent = new Intent(this, MusicService.class);//创建意图对象conn = new MyServiceConn();//创建服务连接对象bindService(intent, conn, BIND_AUTO_CREATE); //绑定服务//为滑动条添加事件监听sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, booleanfromUser) { //滑动条进度改变时，会调用此方法if (progress == seekBar.getMax()) { //当滑动条滑到末端时，结束动画animator.pause(); //停止播放动画}}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {//滑动条开始滑动时调用}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) { //滑动条停止滑动时调用//根据拖动的进度改变音乐播放进度int progress = seekBar.getProgress();//获取seekBar的进度musicControl.seekTo(progress); //改变播放进度}});ImageView iv_music = (ImageView) findViewById(R.id.iv_music);animator = ObjectAnimator.ofFloat(iv_music, "rotation", 0f, 360.0f);animator.setDuration(10000); //动画旋转一周的时间为10秒animator.setInterpolator(new LinearInterpolator());animator.setRepeatCount(-1); //-1表示设置动画无限循环}4.运行结果开始播放如图4-1所示图4-15.实验小结通过此次实验，让我了解到了Android中的服务创建，比如下载文件、播放音乐等功能，其中让我学到了一个背景选择器，可以通过这个选择器动态呈现按钮的背景颜色。
Android简易⾳乐播放器实现代码本⽂实例为⼤家分享了Android⾳乐播放器的具体代码，供⼤家参考，具体内容如下1.播放项⽬内的⾳乐package com.thm.g150820_android26_playmusic;import Android.media.MediaPlayer;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ImageButton;import android.widget.SeekBar;public class MainActivity extends AppCompatActivity {private MediaPlayer mediaPlayer;private SeekBar seekBar;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_main);seekBar = (SeekBar) findViewById(R.id.seekBar);seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {//获取拖动结束之后的位置int progress = seekBar.getProgress();//跳转到某个位置播放mediaPlayer.seekTo(progress);}});}public void isPlayOrPause(View view){//把View强转为ImageButtonImageButton imageButton = (ImageButton) view;if(mediaPlayer==null) {//实例化MediaPlayermediaPlayer = MediaPlayer.create(this, R.raw.yao);//开始播放mediaPlayer.start();//图标修改为暂停的图标imageButton.setImageResource(android.R.drawable.ic_media_pause);//获取⾳乐的总时长int duration = mediaPlayer.getDuration();//设置进度条的最⼤值为⾳乐的总时长seekBar.setMax(duration);new MyThre().start();}//判断如果⾳乐在播放else if(mediaPlayer.isPlaying()){//就暂停⾳乐mediaPlayer.pause();//图标修改为播放的图标imageButton.setImageResource(android.R.drawable.ic_media_play);}else{mediaPlayer.start();//图标修改为暂停的图标imageButton.setImageResource(android.R.drawable.ic_media_pause);}}//写内部类class MyThre extends Thread{@Overridepublic void run() {super.run();while(seekBar.getProgress()<=seekBar.getMax()){//获取当前⾳乐播放的位置int currentPosition = mediaPlayer.getCurrentPosition();//让进度条动起来seekBar.setProgress(currentPosition);}}}}2.播放内存卡中的⾳乐package com.thm.g150820_android26_playmusic;import android.media.AudioManager;import android.media.MediaPlayer;import .Uri;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ImageButton;import android.widget.SeekBar;import java.io.IOException;public class MainActivity extends AppCompatActivity {private MediaPlayer mediaPlayer;private SeekBar seekBar;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_main);seekBar = (SeekBar) findViewById(R.id.seekBar);seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { }@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {//获取拖动结束之后的位置int progress = seekBar.getProgress();//跳转到某个位置播放mediaPlayer.seekTo(progress);}});}public void isPlayOrPause(View view){//把View强转为ImageButtonImageButton imageButton = (ImageButton) view;if(mediaPlayer==null) {//实例化MediaPlayer//播放应⽤内的⾳乐//mediaPlayer = MediaPlayer.create(this, R.raw.yao);//播放内存卡中的⾳乐mediaPlayer = new MediaPlayer();//设置类型mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);//设置⾳乐路径try {mediaPlayer.setDataSource(this, Uri.parse("storage/sdcard0/Music/a.mp3"));//播放之前准备⼀下mediaPlayer.prepare();} catch (IOException e) {e.printStackTrace();}//开始播放mediaPlayer.start();//图标修改为暂停的图标imageButton.setImageResource(android.R.drawable.ic_media_pause);//获取⾳乐的总时长int duration = mediaPlayer.getDuration();//设置进度条的最⼤值为⾳乐的总时长seekBar.setMax(duration);new MyThre().start();}//判断如果⾳乐在播放else if(mediaPlayer.isPlaying()){//就暂停⾳乐mediaPlayer.pause();//图标修改为播放的图标imageButton.setImageResource(android.R.drawable.ic_media_play);}else{mediaPlayer.start();//图标修改为暂停的图标imageButton.setImageResource(android.R.drawable.ic_media_pause);}}//写线程内部类class MyThre extends Thread{@Overridepublic void run() {super.run();while(seekBar.getProgress()<=seekBar.getMax()){//获取当前⾳乐播放的位置int currentPosition = mediaPlayer.getCurrentPosition();//让进度条动起来seekBar.setProgress(currentPosition);}}}}3.添加读取内存的权限更多关于播放器的内容请点击进⾏学习。
最全的Android开源音乐播放器源码汇总收集了很多音乐播放器类的Android项目源码，非常不错的开源项目，会让你事半功倍，希望大家补充。
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Android 音乐播放器（晴天播放）Android优雅音乐源码Android MusicPlayer音乐播放器源码Android 简易音乐播放器源码GitHub开源项目之Jamendo音乐播放器Android音乐播放器歌词显示实例。
Android应⽤开发--MP3⾳乐播放器代码实现（⼀）需求1：将内存卡中的MP3⾳乐读取出来并显⽰到列表当中1. 从数据库中查询所有⾳乐数据，保存到List集合当中，List当中存放的是Mp3Info对象2. 迭代List集合，把每⼀个Mp3Info对象的所有属性，保存到Map对象当中3. 定义⼀个List集合，把Map对象添加到List集合当中4. 通过定义⼀个SimpleAdpter,调⽤setAdpter⽅法，将数据显⽰到列表当中[java]1. /**2. * ⽤于从数据库中查询歌曲的信息，保存在List当中3. *4. * @return5. */6. public List<Mp3Info> getMp3Infos() {7. Cursor cursor = getContentResolver().query(8. MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null,9. MediaStore.Audio.Media.DEFAULT_SORT_ORDER);10. List<Mp3Info> mp3Infos = new ArrayList<Mp3Info>();11. for (int i = 0; i < cursor.getCount(); i++) {12. Mp3Info mp3Info = new Mp3Info();13. cursor.moveToNext();14. long id = cursor.getLong(cursor15. .getColumnIndex(MediaStore.Audio.Media._ID)); //⾳乐id16. String title = cursor.getString((cursor17. .getColumnIndex(MediaStore.Audio.Media.TITLE)));//⾳乐标题18. String artist = cursor.getString(cursor19. .getColumnIndex(MediaStore.Audio.Media.ARTIST));//艺术家20. long duration = cursor.getLong(cursor21. .getColumnIndex(MediaStore.Audio.Media.DURATION));//时长22. long size = cursor.getLong(cursor23. .getColumnIndex(MediaStore.Audio.Media.SIZE)); //⽂件⼤⼩24. String url = cursor.getString(cursor25. .getColumnIndex(MediaStore.Audio.Media.DATA)); //⽂件路径26. int isMusic = cursor.getInt(cursor27. .getColumnIndex(MediaStore.Audio.Media.IS_MUSIC));//是否为⾳乐28. if (isMusic != 0) { //只把⾳乐添加到集合当中29. mp3Info.setId(id);30. mp3Info.setTitle(title);31. mp3Info.setArtist(artist);32. mp3Info.setDuration(duration);33. mp3Info.setSize(size);34. mp3Info.setUrl(url);35. mp3Infos.add(mp3Info);36. }37. }38. return mp3Infos;39. }[java]1. /**2. * 填充列表3. * @param mp3Infos4. */5. public void setListAdpter(List<Mp3Info> mp3Infos) {6. List<HashMap<String, String>> mp3list = new ArrayList<HashMap<String, String>>();7. for (Iterator iterator = mp3Infos.iterator(); iterator.hasNext();) {8. Mp3Info mp3Info = (Mp3Info) iterator.next();9. HashMap<String, String> map = new HashMap<String, String>();10. map.put("title", mp3Info.getTitle());11. map.put("Artist", mp3Info.getArtist());12. map.put("duration", String.valueOf(mp3Info.getDuration()));13. map.put("size", String.valueOf(mp3Info.getSize()));14. map.put("url", mp3Info.getUrl());15. mp3list.add(map);16. }17. mAdapter = new SimpleAdapter(this, mp3list,18. yout.music_list_item_layout, new String[] { "title", "Artist", "duration" },19. new int[] { R.id.music_title, R.id.music_Artist, R.id.music_duration });20. mMusiclist.setAdapter(mAdapter);21. }实现效果如图：需求2：点击列表的每⼀项，启动⼀个服务来播放⾳乐1. 注册条⽬点击监听器OnItemClickListener2. 定义⼀个实现OnItemClickListener接⼝的内部类3. 定义⼀个继承Service的服务类PlayerServie1. 注册条⽬点击监听器OnItemClickListener[java]1. mMusiclist = (ListView) findViewById(R.id.music_list);2. mMusiclist.setOnItemClickListener(new MusicListItemClickListener());3. mp3Infos = getMp3Infos();4. setListAdpter(getMp3Infos());2. 定义⼀个实现OnItemClickListener接⼝的内部类[java]1. private class MusicListItemClickListener implements OnItemClickListener {2. @Override3. public void onItemClick(AdapterView<?> parent, View view, int position,4. long id) {5. if(mp3Infos != null) {6. Mp3Info mp3Info = mp3Infos.get(position);7. Log.d("mp3Info-->", mp3Info.toString());8. Intent intent = new Intent();9. intent.putExtra("url", mp3Info.getUrl());10. intent.putExtra("MSG", AppConstant.PlayerMsg.PLAY_MSG);11. intent.setClass(MainActivity.this, PlayerService.class);12. startService(intent); //启动服务13. }14. }15. }3. 定义⼀个继承Service的服务类PlayerServie（未完善的Service类）[java]1. package com.wwj.sb.service;2.3.4. import android.annotation.SuppressLint;5. import android.app.Service;6. import android.content.Intent;7. import android.media.MediaPlayer;8. import android.media.MediaPlayer.OnPreparedListener;9. import android.os.IBinder;10.11. import com.wwj.sb.domain.AppConstant;12.13. @SuppressLint("NewApi")14. public class PlayerService extends Service {15. private MediaPlayer mediaPlayer = new MediaPlayer(); //媒体播放器对象16. private String path; //⾳乐⽂件路径17. private boolean isPause; //暂停状态18.19. @Override20. public IBinder onBind(Intent arg0) {21. return null;22. }23.24. @Override25. public int onStartCommand(Intent intent, int flags, int startId) {26. if(mediaPlayer.isPlaying()) {27. stop();28. }29. path = intent.getStringExtra("url");30. int msg = intent.getIntExtra("MSG", 0);31. if(msg == AppConstant.PlayerMsg.PLAY_MSG) {32. play(0);33. } else if(msg == AppConstant.PlayerMsg.PAUSE_MSG) {34. pause();35. } else if(msg == AppConstant.PlayerMsg.STOP_MSG) {36. stop();37. }38. return super.onStartCommand(intent, flags, startId);39. }40.41.42. /**43. * 播放⾳乐44. * @param position45. */46. private void play(int position) {47. try {48. mediaPlayer.reset();//把各项参数恢复到初始状态49. mediaPlayer.setDataSource(path);50. mediaPlayer.prepare(); //进⾏缓冲51. mediaPlayer.setOnPreparedListener(new PreparedListener(position));//注册⼀个监听器52. }53. catch (Exception e) {54. e.printStackTrace();55. }56. }57.58. /**59. * 暂停⾳乐60. */61. private void pause() {62. if (mediaPlayer != null && mediaPlayer.isPlaying()) {63. mediaPlayer.pause();64. isPause = true;65. }66. }67.68. /**69. * 停⽌⾳乐70. */71. private void stop(){72. if(mediaPlayer != null) {73. mediaPlayer.stop();74. try {75. mediaPlayer.prepare(); // 在调⽤stop后如果需要再次通过start进⾏播放,需要之前调⽤prepare函数76. } catch (Exception e) {77. e.printStackTrace();78. }79. }80. }81.82.83. @Override84. public void onDestroy() {85. if(mediaPlayer != null){86. mediaPlayer.stop();87. mediaPlayer.release();88. }89. }90. /**91. *92. * 实现⼀个OnPrepareLister接⼝,当⾳乐准备好的时候开始播放93. *94. */95. private final class PreparedListener implements OnPreparedListener {96. private int positon;97.98. public PreparedListener(int positon) {99. this.positon = positon;100. }101.102. @Override103. public void onPrepared(MediaPlayer mp) {104. mediaPlayer.start(); //开始播放105. if(positon > 0) { //如果⾳乐不是从头播放106. mediaPlayer.seekTo(positon);107. }108. }109. }110.111. }public class MusicActivity extends Activity {private boolean isStop = false;private MediaPlayer mPlayer;public final String TITLE = Environment.getExternalStorageDirectory()+ "/iwantyourlove.mp3";private File file;private SeekBar seekBar;private ImageView play;private TextView title;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.music_main);initWidgets();}// 重新初始化播放器public void initWidgets() {play = (ImageView) findViewById(R.id.img_stop);title = (TextView) findViewById(R.id.title);seekBar = (SeekBar) findViewById(R.id.seek);seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Overridepublic void onStopTrackingTouch(SeekBar seekBar) {//seekBar.setProgress(mPlayer.getCurrentPosition() *seekBar.getMax() / total); //Log.i("sss", seekBar.getProgress()+"");//mPlayer.seekTo(mPlayer.getCurrentPosition());mPlayer.seekTo(seekBar.getProgress() * mPlayer.getDuration() /100 );}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// Log.i("progress", ""+progress);// Log.i("qqq", seekBar.getProgress()+"");// progress = currentPosition * 100 / duration;//progress*duration/100//mPlayer.seekTo(progress * mPlayer.getDuration() /100 );}});file = new File(TITLE);title.setText(file.getName());mPlayer = new MediaPlayer();try {mPlayer.setDataSource(TITLE);mPlayer.prepare();} catch (Exception e) {e.printStackTrace();}}public void play(View v) {if (!mPlayer.isPlaying()) {mPlayer.start();}}public void pause(View v) {if (mPlayer.isPlaying()) {mPlayer.pause();}}public void replay(View v) {mPlayer.reset();initWidgets();// 重新构建播放器// mPlayer.start();play(v);}public void stop(View v) {isStop = true;mPlayer.stop();play.setImageResource(R.drawable.player_play);}// ⽤图⽚代替按钮public void playOrPause(View v) {if (isStop) {// 停⽌后重新开始播放mPlayer.reset();initWidgets();mPlayer.start();play.setImageResource(R.drawable.player_pause);isStop = false;} else if (mPlayer.isPlaying()) {// 播放状态play.setImageResource(R.drawable.player_play);mPlayer.pause();} else {// 暂停状态play.setImageResource(R.drawable.player_pause);mPlayer.start();}// 异步任务new MusicTask().execute();}@Overrideprotected void onDestroy() {super.onDestroy();// 释放资源mPlayer.release();}// ⾳乐播放异步任务class MusicTask extends AsyncTask<Void, Void, Void> {//int current = mPlayer.getCurrentPosition();// 当前播放是什么位置，int total = mPlayer.getDuration(); // ⾳乐总共多长时间@Overrideprotected Void doInBackground(Void... params) {// 让SeekBar跟着⾳乐⼀起向右边⾛while (mPlayer.getCurrentPosition() <= total&&!isStop) { //!isPause不是停⽌状态try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}publishProgress();}return null;}@Overrideprotected void onProgressUpdate(Void... values) {super.onProgressUpdate(values);// Log.i("msg", ""+mPlayer.getCurrentPosition() * 100 / total);seekBar.setProgress(mPlayer.getCurrentPosition() *seekBar.getMax() / total); }@Overrideprotected void onPostExecute(Void result) {super.onPostExecute(result);}}}。
目录第一章引言................................................................................................... - 1 -1.1 项目背景............................................................................................ - 1 -1.2 编写目的............................................................................................ - 2 -1.3 参考资料............................................................... 错误！未定义书签。
第二章系统需求分析..................................................................................... - 3 -2.1 功能需求（用例图分析）................................................................ - 3 -2.1.1 播放器的基本控制需求......................................................... - 3 -2.1.2 播放清单列表管理需求......................................................... - 5 -2.1.3 播放友好性需求..................................................................... - 7 -2.1.4 播放器扩展卡需求................................................................. - 8 -2.1.5 功能需求(时序图)分析.......................................................... - 9 -2.2 系统结构图和流程图...................................................................... - 10 -2.3 系统界面需求.................................................................................. - 11 -2.4 系统性能需求.................................................................................. - 12 -2.5 运行环境需求.................................................................................. - 12 - 第三章Android数据库设计 ........................................................................ - 13 -3.1 数据库及字段属性设计.................................................................. - 13 -3.1.1 字段设计（表、图）........................................................... - 13 -3.1.2 音乐播放器E-R图 .............................................................. - 15 -3.2 数据库连接...................................................................................... - 15 -3.2.1 创建数据库........................................................................... - 15 -3.2.2 操作数据库........................................................................... - 16 -3.2.3 数据显示............................................................................... - 17 - 第四章Android项目介绍 ............................................................................ - 18 -4.1 什么是Android？ ........................................................................... - 18 -4.1.1 Android简介 ......................................................................... - 18 -4.1.2 Android Features特性........................................................... - 18 -4.1.3 Android基本框架（Android Architecture） ....................... - 19 -4.2 搭建Android开发环境 .................................................................. - 23 -4.3 Android常用工具的使用 ................................................................ - 25 -4.3.1 命令行的使用....................................................................... - 25 -4.3.2 Dalvik Debug Monitor Service (DDMS)的使用................... - 26 -4.4 Android 音乐播放器的工程 ........................................................... - 26 -4.4.1 Android项目 ......................................................................... - 26 -4.4.2 Android工程程序结构 ......................................................... - 27 -4.4.3 AndroidManifest.xml文件.................................................... - 29 - 第五章播放器系统功能详细设计............................................................... - 31 -5.1音乐播放器主界面功能实现........................................................... - 31 -5.1.1 播放器主界面....................................................................... - 31 -5.1.2 播放界面音轨的实现........................................................... - 32 -5.1.3 播放器播放、暂停、停止等功能....................................... - 35 -5.2 播放列表功能.................................................................................. - 36 -5.3 菜单功能.......................................................................................... - 38 -5.3.1 菜单界面............................................................................... - 38 -5.3.2 菜单功能实现....................................................................... - 39 -5.4 播放设置界面.................................................................................. - 41 -5.4.1 界面实现............................................................................... - 41 -5.4.2 歌词显示实现....................................................................... - 42 -5.5 手机扩展卡的访问.......................................................................... - 44 -5.5.1 文件浏览器界面................................................................... - 45 -5.5.2 文件浏览器功能实现........................................................... - 46 -5.6 数据存储方式.................................................................................. - 47 -5.6.1 SharedPreferences .................................................................. - 47 -5.6.2 File存储方式 ........................................................................ - 48 -5.6.3 SQLiteDatabase数据库 ........................................................ - 48 - 第六章结论...................................................................... 错误！未定义书签。
