在timer 中 timerTask執行過程中cancel是無效的。

檢視原始碼：

/**
 * Cancels the {@code TimerTask} and removes it from the {@code Timer}'s queue. Generally, it
 * returns {@code false} if the call did not prevent a {@code TimerTask} from running at
 * least once. Subsequent calls have no effect.
 *
 * @return {@code true} if the call prevented a scheduled execution
 
 *         from taking place, {@code false} otherwise.
 */
public boolean cancel() {
    synchronized (lock) {
        boolean willRun = !cancelled && when > 0;
cancelled = true;
return willRun;
}
}

eg:

  llBlank.setOnTouchListener(new View.OnTouchListener() {
                                   private 
 
TimerTask task;
private Timer mTimer;
@Override
public boolean onTouch(View v, MotionEvent event) {
                                       switch (event.getAction()) {
                                           case MotionEvent.ACTION_DOWN:
                                               mTimer = new 
 
Timer();
task = new TimerTask() {
                                                   @Override
public void run() {
                                                       Message message = new Message();
Vibrator vib = (Vibrator) getApplicationContext().getSystemService(Service.VIBRATOR_SERVICE);
long[] pattern = {0, 80};
if (rlAdvance.getVisibility() == View.GONE) {
                                                           /**震動服務*/
vib.vibrate(pattern, 1);
message.what = showAdvance;
handler1.sendMessage(message);
}
                                                   }
                                               };
mTimer.schedule(task, 2000);
break;
case MotionEvent.ACTION_UP:
                                               mTimer.cancel();
task.cancel();
}

                                       return false;
}
                               }
    );
}