Android Runnable在removeCallbacks()之后未停止

Question

我试图使用removeCallbacks停止Runnable，但不知怎么的，它不会停止。-这是我的变量

 private int mInterval = 2000; // 2 seconds by default, can be changed later
private Handler mHandler = new Handler();

和我的可运行

Runnable mStatusChecker = new Runnable() {
    @Override
    public void run() {
        try {
                checkPayNow();
        } finally {
            // 100% guarantee that this always happens, even if
            // your update method throws an exception
            mHandler.postDelayed(mStatusChecker, mInterval);
        }
    }
};

和我正在运行的方法，直到它给我一个特定的值，然后我停止

public void checkPayNow(){
    if (!url.isEmpty()){
        //url now has text
        mHandler.removeCallbacks(mStatusChecker);
    }else {
        //no text yet
    }

}

Answer 1

boolean stoped = false;
Runnable mStatusChecker = new Runnable() {
    @Override
    public void run() {
        try {    
             checkPayNow();
        } finally {
           if(!stoped)
            mHandler.postDelayed(mStatusChecker, mInterval);
        }
    }
};

当您想要停止时，将其设为stoped = true。

并从CCD_ 2中移除处理程序。

public void checkPayNow(){
    if (!url.isEmpty()){
        //url now has text
        //mHandler.removeCallbacks(mStatusChecker);
    }else {
        //no text yet
    }
}

Answer 2

您可以尝试在没有removeCallbacks的情况下这样做：

Runnable mStatusChecker = new Runnable() {
    @Override
    public void run() {
        if(!checkPayNow()) {
//if not ready so far, then check in some delay again
            mHandler.postDelayed(mStatusChecker, mInterval);
        }
    }
};
public boolean checkPayNow(){
    return !url.isEmpty();

}