Android如何接收外部broadcast

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给出一个接收SD插拔的广播demo，相信依样画葫芦可以成功。

创建一个内部广播接收类

private SdcardStateChanageReceiver sdcardStateReceiver ;

在onCreate加入你感兴趣的事件:

IntentFilter filter = new IntentFilter(); filter.addAction(Intent. ACTION_MEDIA_REMOVED );filter.addAction(Intent. ACTION_MEDIA_EJECT );//SD卡弹出 filter.addAction(Intent. ACTION_MEDIA_MOUNTED ); filter.addDataScheme( "file" );sdcardStateReceiver = new SdcardStateChanageReceiver();  registerReceiver( sdcardStateReceiver ,filter);//注册广播

在onDestroy里记得取消注册。

unregisterReceiver( sdcardStateReceiver );

以下才是对外部广播事件的真正处理

class SdcardStateChanageReceiver extends BroadcastReceiver{                           @Override             public void onReceive(Context context, Intent intent) {                   // TODO Auto-generated method stub                  String action = intent.getAction();              if (action.equals(Intent. ACTION_MEDIA_EJECT)){                  Log. i( TAG, "sd removed" );                  //SD卡移除处理语句              } else if (action.equals(Intent. ACTION_MEDIA_MOUNTED)){                   System.out.println("ACTION_MEDIA_MOUNTED");              }                              }      }

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