Question

我正在尝试在我的onPause（）中停止我的线程，但该线程仍然运行并获取线程到期时发送的通知。似乎我已经把一切都设置得正确...我的通知工作正常并在8000睡眠后出现..但如果用户离开/ onPause（）之前通知仍然会弹出。

private static final int MY_NOTIFICATION_ID=1;
     private NotificationManager notificationManager;
     private Notification myNotification;
 Thread timer;

protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);
        setContentView(R.layout.expire);

        timer = new Thread(){
                public void run(){
                    try{
                        sleep(8000);                    
                    } catch (InterruptedException e){
                        e.printStackTrace();
                    }finally{
                        NotificationManager notificationManager =
                                (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
                               myNotification = new Notification(R.drawable.missedcall,
                                 "Exired",
                                 System.currentTimeMillis());
                               Context context = getApplicationContext();
                               String notificationTitle = "Time Expired";
                               String notificationText = "Try next time";
                               Intent myIntent = new Intent();
                               PendingIntent pendingIntent
                                 = PendingIntent.getActivity(CallScreen.this,
                                   0, myIntent,
                                   Intent.FLAG_ACTIVITY_NEW_TASK);
                               myNotification.defaults |= Notification.DEFAULT_SOUND;
                               myNotification.flags |= Notification.FLAG_AUTO_CANCEL;
                               myNotification.setLatestEventInfo(context,
                                  notificationTitle,
                                  notificationText,
                                  pendingIntent);
                               notificationManager.notify(MY_NOTIFICATION_ID, myNotification);
                               finish();


                    }
                }
            };
            timer.start();

}


@Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        timer.stop();
        finish();
        }

Answer 1

首先：您是否希望finally语句中的代码始终执行？因为，如上所述，您无法在不更新通知的情况下退出该线程。

如果可以，只需调用timer.interrupt()，这将触发您的InterruptedException处理程序＆amp;然后调用你的finally块 - 如果你反对中断线程并且真的感觉附加你的线程，你总是可以使用一个锁存器来释放它。

public class SomeDamnedActivity extends Activity {
    // ... misc junk ...
    private CountDownLatch mLatch;
    private Thread mThread;

    protected void onCreate(Bundle savedInstanceState) {
        mLatch = new CountDownLatch(1);
        mThread = new Thread() {
            public void run() {
                try {
                    mLatch.await(8, TimeUnit.SECONDS);
                } catch (InterruptedException e) {
                    Log.w(TAG, "Interrupted waiting for latch to release", e);
                } finally {
                    // Stuff goes here that you want to execute.
                }
            }
        };      
    }

    protected void onPause() {
        // ...
        mLatch.countDown(); // This will release the latch "prematurely" calling your finally-statement.
    }

（仅供参考：AsyncTask可能是一个更好的主意或使用Runnable向您的布局中的视图发布View#postDelayed(Runnable, long)）

Answer 2

出于好奇，你怎么知道onPause（）实际上被调用了？

使用Toast或Log查找您的应用进入onPause（）状态

线程不会在onPause中停止

2 个答案: