Android 从 ram 清除时广播不执行

Question

您好，我创建了广播接收器，它在 Intent.ACTION_BATTERY_CHANGED 事件中接收电池电量。它工作得很好但是当我使用从按住主页按钮滑动时从 ram 中删除这个应用程序然后它没有收到事件。我的广播代码是

private BroadcastReceiver BatteryReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        int level = intent.getIntExtra("level", 0);
        Toast.makeText(BatteryIndicatorService.this,""+level, Toast.LENGTH_SHORT).show();
    }
};

Answer 1

这可以在您的广播运行在后台进行时完成，您需要创建 service.In 此服务，您必须定义广播。

BatteryIndicatorService.java

public class BatteryIndicatorService extends Service {
private BroadcastReceiver BatteryReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        int level = intent.getIntExtra("level", 0);
        Toast.makeText(BatteryIndicatorService.this,""+level, Toast.LENGTH_SHORT).show();
    }
};

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

public void onCreate() {
    // TODO Auto-generated method stub
    super.onCreate();
    // Register Receiver.
    registerReceiver(BatteryReceiver, new IntentFilter(
            Intent.ACTION_BATTERY_CHANGED));
}

public void onStart(Intent intent, int startId) {
    // TODO Auto-generated method stub
    super.onStart(intent, startId);
}

@Override
public void onDestroy() {
      // TODO Auto-generated method stub
      super.onDestroy();
   }
}

然后像

一样从 MainActivity 启动它

MainActivity.java

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    // Start service in Background
    startService(new Intent(this, BatteryIndicatorService.class));
 }

在应用程序标签 Manifest.xml 中定义服务

manifest.xml

<service
        android:name="com.ittl.batteryindicator.BatteryIndicatorService"
        android:enabled="true" >
</service>

Android 从 ram 清除时广播不执行

Android Broadcast not execute when clear from ram

android

broadcast