android - ストップウォッチで通知を使用する

Question

通知/ステータスバーでストップウォッチを使用しています。

• でストップウォッチを取得contentText しgetFormattedElapsedTime()ます。動作しますが、アプリケーションを閉じると停止します。アプリを閉じてもどうすれば動作しますか?

  private NotificationManager m_notificationMgr;
  private Notification m_notification;
     // Timer to update the ongoing notification
   private final long mFrequency = 100;    // milliseconds
      private final int TICK_WHAT = 2; 
      private Handler mHandler = new Handler() {
          public void handleMessage(Message m) {
              updateNotification();
              sendMessageDelayed(Message.obtain(this, TICK_WHAT), mFrequency);
          }
      };
  
      @Override
      public void onCreate() {
          super.onCreate();
          Log.d(TAG, "created");
  
          m_stopwatch = new Stopwatch();
          m_notificationMgr = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
  
          createNotification();
      }
  
  
  public void createNotification() {
          Log.d(TAG, "creating notification");
  
  
          int icon = R.drawable.icon;
          CharSequence tickerText = "Meb";
          long when = System.currentTimeMillis();
  
          m_notification = new Notification(icon, tickerText, when);
          m_notification.flags |= Notification.FLAG_ONGOING_EVENT;
          m_notification.flags |= Notification.FLAG_NO_CLEAR;
      }
  
      public void updateNotification() {
          // Log.d(TAG, "updating notification");
  
          Context context = getApplicationContext();
          CharSequence contentTitle = "Mebr";
          CharSequence contentText = getFormattedElapsedTime();
  
          Intent notificationIntent = new Intent(this, TimerFragmentActivity.class);
          PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
  
          // the next two lines initialize the Notification, using the configurations above
          m_notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
          m_notificationMgr.notify(NOTIFICATION_ID, m_notification);
      }
  
      public void showNotification() {
          Log.d(TAG, "showing notification");
  
          updateNotification();       
          mHandler.sendMessageDelayed(Message.obtain(mHandler, TICK_WHAT), mFrequency);
      }
  
      public void hideNotification() {
          Log.d(TAG, "removing notification");
  
          m_notificationMgr.cancel(NOTIFICATION_ID);
          mHandler.removeMessages(TICK_WHAT);
      }
  

Answer 1

アクティビティが一時停止または停止した後でも実行し続けることができるServiceから通知を更新する必要があります。