Android开发应用中Broadcast Receiver组件详解

/** 
 * MainActivity 
 * @author zuolongsnail 
 * 
 */ 
public class MainActivity extends Activity { 
  private Button sendStaticBtn; 
  private Button sendDynamicBtn; 
  private Button sendSystemBtn; 
  private static final String STATICACTION = "com.byread.static"; 
  private static final String DYNAMICACTION = "com.byread.dynamic"; 
  // USB设备连接 
  private static final String SYSTEMACTION = Intent.ACTION_POWER_CONNECTED; 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    sendStaticBtn = (Button) findViewById(R.id.send_static); 
    sendDynamicBtn = (Button) findViewById(R.id.send_dynamic); 
    sendSystemBtn = (Button) findViewById(R.id.send_system); 
    sendStaticBtn.setOnClickListener(new MyOnClickListener()); 
    sendDynamicBtn.setOnClickListener(new MyOnClickListener()); 
    sendSystemBtn.setOnClickListener(new MyOnClickListener()); 
  } 
  class MyOnClickListener implements OnClickListener{ 
    @Override 
    public void onClick(View v) { 
      // 发送自定义静态注册广播消息 
      if(v.getId() == R.id.send_static){ 
        Log.e("MainActivity", "发送自定义静态注册广播消息"); 
        Intent intent = new Intent(); 
        intent.setAction(STATICACTION); 
        intent.putExtra("msg", "接收静态注册广播成功！"); 
        sendBroadcast(intent); 
      } 
      // 发送自定义动态注册广播消息 
      else if(v.getId() == R.id.send_dynamic){ 
        Log.e("MainActivity", "发送自定义动态注册广播消息"); 
        Intent intent = new Intent(); 
        intent.setAction(DYNAMICACTION); 
        intent.putExtra("msg", "接收动态注册广播成功！"); 
        sendBroadcast(intent); 
      } 
      // 发送系统动态注册广播消息。当手机连接充电设备时会由系统自己发送广播消息。 
      else if(v.getId() == R.id.send_system){ 
        Log.e("MainActivity", "发送系统动态注册广播消息"); 
        Intent intent = new Intent(); 
        intent.setAction(SYSTEMACTION); 
        intent.putExtra("msg", "正在充电。。。。"); 
      } 
    } 
  } 
  @Override 
  protected void onStart() { 
    super.onStart(); 
    Log.e("MainActivity", "注册广播事件"); 
    // 注册自定义动态广播消息 
    IntentFilter filter_dynamic = new IntentFilter(); 
    filter_dynamic.addAction(DYNAMICACTION); 
    registerReceiver(dynamicReceiver, filter_dynamic); 
    // 注册系统动态广播消息 
    IntentFilter filter_system = new IntentFilter(); 
    filter_system.addAction(SYSTEMACTION); 
    registerReceiver(systemReceiver, filter_system); 
  } 
  private BroadcastReceiver dynamicReceiver = new BroadcastReceiver() { 
     
    @Override 
    public void onReceive(Context context, Intent intent) { 
      Log.e("MainActivity", "接收自定义动态注册广播消息"); 
      if(intent.getAction().equals(DYNAMICACTION)){ 
        String msg = intent.getStringExtra("msg"); 
        Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); 
      } 
    } 
  }; 
  private BroadcastReceiver systemReceiver = new BroadcastReceiver() { 
     
    @Override 
    public void onReceive(Context context, Intent intent) { 
      Log.e("MainActivity", "接收系统动态注册广播消息"); 
      if(intent.getAction().equals(SYSTEMACTION)){ 
        String msg = intent.getStringExtra("msg"); 
        Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); 
      } 
    } 
  }; 
} 

/** 
 * 自定义静态注册广播消息接收器 
 * @author zuolongsnail 
 * 
 */ 
public class StaticReceiver extends BroadcastReceiver { 
 
  @Override 
  public void onReceive(Context context, Intent intent) { 
    String msg = intent.getStringExtra("msg"); 
    Toast.makeText(context, msg, Toast.LENGTH_SHORT).show(); 
  } 
} 

/** 
 * 系统静态注册广播消息接收器 
 * 
 * @author zuolongsnail 
 * 
 */ 
public class SystemReceiver extends BroadcastReceiver { 
 
  @Override 
  public void onReceive(Context context, Intent intent) { 
    if (intent.getAction().equals(Intent.ACTION_BATTERY_LOW)) { 
      Log.e("SystemReceiver", "电量低提示"); 
      Toast.makeText(context, "您的手机电量偏低，请及时充电", Toast.LENGTH_SHORT).show(); 
    } 
  } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.byread" android:versionCode="1" android:versionName="1.0"> 
  <application android:icon="@drawable/icon" android:label="@string/app_name"> 
    <activity android:name=".MainActivity" android:label="@string/app_name"> 
      <intent-filter> 
        <action android:name="android.intent.action.MAIN" /> 
        <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
    </activity> 
    <!-- 注册自定义静态广播接收器 --> 
    <receiver android:name=".StaticReceiver"> 
      <intent-filter> 
        <action android:name="com.byread.static" /> 
      </intent-filter> 
    </receiver> 
    <!-- 注册系统静态广播接收器 --> 
    <receiver android:name=".SystemReceiver"> 
      <intent-filter> 
        <action android:name="android.intent.action.BATTERY_LOW" /> 
      </intent-filter> 
    </receiver> 
  </application> 
</manifest> 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:orientation="vertical" android:layout_width="fill_parent" 
  android:layout_height="fill_parent"> 
  <TextView android:layout_width="fill_parent" 
    android:layout_height="wrap_content" android:text="@string/hello" /> 
  <Button android:id="@+id/send_static" android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:text="发送自定义静态注册广播" /> 
  <Button android:id="@+id/send_dynamic" android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:text="发送自定义动态注册广播" /> 
  <Button android:id="@+id/send_system" android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:text="发送系统动态注册广播" /> 
</LinearLayout>