CountDownTimer onTick（）無法更新類的成員

我更新onTick（）方法中的CountDownTimer內的字段。但是，該字段始終爲0.您是否瞭解導致問題的原因？CountDownTimer onTick（）無法更新類的成員

public class Counter { 

    private static final long SECOND_MS = 1000; 
    private static final long MINUTE_MS = 60 * SECOND_MS; 
    private static final long TOTAL_TIME_MS = 5 * MINUTE_MS; 

    public long mSecondsSinceLastPick; 

    public long getSecondsSinceLastSchedulerStarted() { 
     Timber.d(String.format("get mSecondsSinceLastPick = %s", mSecondsSinceLastPick)); 
     return mSecondsSinceLastPick; 
    } 


    private CountDownTimer mCountDownTimer = new CountDownTimer(TOTAL_TIME_MS, SECOND_MS) { 

     public void onTick(long millisUntilFinished) { 
      Timber.d(String.format("onTick mSecondsSinceLastPick = %s", mSecondsSinceLastPick)); 
      mSecondsSinceLastPick = (TOTAL_TIME_MS - millisUntilFinished)/SECOND_MS; 
     } 

     public void onFinish() { 
     } 
    }; 

public void startCounting() { 
    mCountDownTimer.start(); 
} 
}

將帖子日誌輸出看起來像

06-19 15:42:57.293 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 4 
06-19 15:42:58.293 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 5 
06-19 15:42:59.299 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 6 
06-19 15:43:00.320 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 7 
06-19 15:43:01.321 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 8 
06-19 15:43:01.507 9994-9994/com.nav.survey D/GroundTruthReminderManager:22: get mSecondsSinceLastPick = 0 
06-19 15:43:02.322 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 9 
06-19 15:43:03.324 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 10 
06-19 15:43:04.325 9994-9994/com.nav.survey D/GroundTruthReminderManager:38: onTick mSecondsSinceLastPick = 11

來源

2017-06-19 qbait

的問題是，你不開始計時

mCountDownTimer.start();

或

private CountDownTimer mCountDownTimer = new CountDownTimer(TOTAL_TIME_MS, SECOND_MS) { 

    public void onTick(long millisUntilFinished) { 
     Timber.d(String.format("onTick mSecondsSinceLastPick = %s", mSecondsSinceLastPick)); 
     mSecondsSinceLastPick = (TOTAL_TIME_MS - millisUntilFinished)/SECOND_MS; 
    } 

    public void onFinish() { 
    } 
}.start();

來源

2017-06-19 14:58:51

我開始了，但忘了複製這段代碼。一般來說，當我將它記錄在onTick（）中時，一切都會正確顯示。當我在getter中記錄字段時，它總是0. – qbait

你什麼時候得到它？你只有一次嗎？ –

我在計數期間多次打電話給getter。我添加了日誌。 – qbait

問題是與創造我的櫃檯。我使用Dagger @Singleton註解來提供Counter，但是無論如何，Counter的2個實例都被創建了，並且它引發了一個問題。

來源

2017-06-19 15:30:12 qbait

CountDownTimer onTick（）無法更新類的成員

回答

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