在Android中扫描wifi热点
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1、首先新建了布局模板XML文件vifi.xml,代码很简单，如下：
[代码]java代码：
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android:orientation="vertical"android:layout_width="fill_parent"
4 android:layout_height="fill_parent">
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7 android:layout_height="wrap_content"
8 android:text="@string/hello"/>
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2、写java代码，新建个Activity，代码如下：
[代码]java代码：
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001 importjava.util.List;
002
003 importandroid.app.Activity;
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005 importandroid.content.BroadcastReceiver;
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007 importandroid.content.Context;
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009 importandroid.content.Intent;
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011 importandroid.content.IntentFilter;
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013 importandroid.net.wifi.ScanResult;
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015 importandroid.net.wifi.WifiManager;
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017 importandroid.os.Bundle;
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019 importandroid.view.Menu;
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021 importandroid.view.MenuItem;
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023 importandroid.widget.TextView;
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025 publicclassWifiTester extendsActivity {
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027 TextView mainText;
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029 WifiManager mainWifi;
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031 WifiReceiver receiverWifi;
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033 List
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035 StringBuilder sb = newStringBuilder();
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037 publicvoidonCreate(Bundle savedInstanceState) {
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039 super.onCreate(savedInstanceState);
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041 setContentView(R.layout.vifi);
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043 setTitle("eoe教程: Wifi Test. -by:IceskYsl");
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045 mainText = (TextView) findViewById(R.id.wifi);
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mainWifi = (WifiManager)
getSystemService(Context.WIFI_SERVICE);
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049 receiverWifi = newWifiReceiver();
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051 registerReceiver(receiverWifi, newIntentFilter(
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053 WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
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055 mainWifi.startScan();
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057 mainText.setText("\nStarting Scan...\n");
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059 }
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061 publicbooleanonCreateOptionsMenu(Menu menu) {
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063 menu.add(, , , "Refresh");
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065 returnsuper.onCreateOptionsMenu(menu);
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067 }
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069 publicbooleanonMenuItemSelected(intfeatureId, MenuItem item) {
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071 mainWifi.startScan();
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073 mainText.setText("Starting Scan");
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075 returnsuper.onMenuItemSelected(featureId, item);
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077 }
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079 protectedvoidonPause() {
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081 unregisterReceiver(receiverWifi);
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083 super.onPause();
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085 }
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087 protectedvoidonResume() {
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089 registerReceiver(receiverWifi, newIntentFilter(
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091 WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
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093 super.onResume();
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095 }
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097 classWifiReceiver extendsBroadcastReceiver {
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099 publicvoidonReceive(Context c, Intent intent) {
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101 sb = newStringBuilder();
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103 wifiList = mainWifi.getScanResults();
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105 for(inti = ; i < wifiList.size(); i++) {
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107 sb.append(newInteger(i + ).toString() + ".");
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109 sb.append((wifiList.get(i)).toString());
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111 sb.append("\n\n");
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113 }
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115 mainText.setText(sb);
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117 }
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119 }
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121 }
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124 、申请相关权限，代码如下： view sourceprint?
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android:name="android.permission.ACCESS_CHECKIN_PROPERTIES">-permission> 128 130 13 android:name="android.permission.CHANGE_WIFI_STATE">ion> 13 android:name="android.permission.MODIFY_PHONE_STATE">sion>
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