如何在android中创建倒计时onClickListener答案

【问题标题】：how to create countdown onClickListener in android如何在android中创建倒计时onClickListener
【发布时间】：2021-05-22 14:07:17
【问题描述】：

这种情况就像用户触摸一个视图并保持该视图指定的秒数。类似于长焦点侦听器但具有指定计时器的东西，如果用户在计时器之前将手指移开，那么它将不会调用操作。是否可以？请指导。

【问题讨论】：

标签： android listener

【解决方案1】：

public class MainActivity extends Activity {
// This example shows an Activity, but you would use the same approach if
// you were subclassing a View.
//Declare timer
CountDownTimer cTimer = null;    
@Override
public boolean onTouchEvent(MotionEvent event){

    int action = MotionEventCompat.getActionMasked(event);

    switch(action) {
        case (MotionEvent.ACTION_DOWN) :
            startTimer();
            Log.d(DEBUG_TAG,"Action was DOWN");
            return true;
        case (MotionEvent.ACTION_UP) :
            cancelTimer();
            Log.d(DEBUG_TAG,"Action was UP");
            return true;
        default :
            return super.onTouchEvent(event);
    }

void startTimer() {
    cTimer = new CountDownTimer(30000, 1000) {
        public void onTick(long millisUntilFinished) {
            //you can keep updating the ui here.
        }
        public void onFinish() {
            //this is where you want to do something on the basis on long tap action.
        }
    };
    cTimer.start();
}
void cancelTimer() {
    if(cTimer!=null)
        cTimer.cancel();
}
}

您可以在 docs 上查看 MotionEvents。

【讨论】：