我的服务在后退按钮后停止

时间:2013-01-07 09:12:50

标签: android service android-activity

我有一项服务和一项沟通活动。 当我点击按钮(我有galaxy s3只有一个按钮)然后我的活动当然消失了,我的服务继续运行,但如果我点击后面(触摸)按钮,那么我的服务就会被破坏。 我怎么能改变它?我希望服务继续运行,直到活动破坏它。

修改

以下是代码:

服务:     公共类MyService扩展了Service     {         private static final String TAG =“BroadcastService”;         public static final String BROADCAST_ACTION =“com.websmithing.broadcasttest.displayevent”;         private final Handler handler = new Handler();         私人意图;         int counter = 0;

    @Override
    public void onCreate() 
    {
        super.onCreate();
        intent = new Intent(BROADCAST_ACTION);  
    }

    @Override
    public void onStart(Intent intent, int startId) 
    {
       // handler.removeCallbacks(sendUpdatesToUI);
        handler.postDelayed(sendUpdatesToUI, 1000); // 1 second

    }

    private Runnable sendUpdatesToUI = new Runnable() {
        public void run() {
            DisplayLoggingInfo();           
            handler.postDelayed(this, 1000); // 10 seconds
        }
    };    

    private void DisplayLoggingInfo() {
        intent.putExtra("counter", String.valueOf(++counter));
        sendBroadcast(intent);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onDestroy() {       
        handler.removeCallbacks(sendUpdatesToUI);       
        super.onDestroy();
    }       
}

的活动:

public class MainActivity extends Activity {
    private static final String TAG = "BroadcastTest";
    private Intent intent;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        intent = new Intent(this, MyService.class);

        startService(intent);
        registerReceiver(broadcastReceiver, new IntentFilter(MyService.BROADCAST_ACTION));
    }

    private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            updateUI(intent);       
        }
    };    


    @Override
    public void onDestroy() {
        super.onPause();
        unregisterReceiver(broadcastReceiver);
        stopService(intent);        
    }   

    private void updateUI(Intent intent) 
    {
        String counter = intent.getStringExtra("counter"); 
        Log.d(TAG, counter);

        TextView txtCounter = (TextView) findViewById(R.id.textView1);
        txtCounter.setText(counter);
    }
}

2 个答案:

答案 0 :(得分:2)

当您按下后退按钮时,您的服务会停止。后退按钮大多数在活动上调用finish(),并且它被销毁。当您按下另一个按钮(主页按钮)时,它只会最小化您的应用程序,并且只有在操作系统想要释放空间时才会销毁它。

如果您希望保持服务正常运行,请将其作为前台服务,并且不要在活动销毁时将其停止。

答案 1 :(得分:0)

你可以将你的应用程序放在后台而不是完成它。

   @Override
    public void onBackPressed() {
     moveTaskToBack(true);
    // super.onBackPressed();
    }