Question

我的问题是我无法找到一种拦截水龙头的方法，而不会阻止其他事件（例如滚动）传播到下面的视图。

我正在使用自定义视图来处理点击事件：

public class TapableImageView extends AppCompatImageView {
    private GestureDetectorCompat mDetector;
    ...
    public void setOnTapListener(OnTapListener onTapListener){
        mDetector = new GestureDetectorCompat(getContext(), new GestureDetector.SimpleOnGestureListener(){
            @Override
            public boolean onSingleTapUp(MotionEvent event) {
                onTapListener.onTap(TapableImageView.this);
                return true;
            }
        });
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        super.dispatchTouchEvent(ev);
        if(mDetector != null)
            return !mDetector.onTouchEvent(ev);
        return false;
    }
}

Answer 1

试试这段代码：

view.setOnTouchListener(new OnTouchListener() {

        private long startClickTime;

        @Override
        public boolean onTouch(View view, MotionEvent event) {

            if (event.getAction() == MotionEvent.ACTION_DOWN) {

                startClickTime = System.currentTimeMillis();
                yourview.dispatchTouchEvent(event);

            } else  if (event.getAction() == MotionEvent.ACTION_MOVE) {

                yourview.dispatchTouchEvent(event);

            }
            else if (event.getAction() == MotionEvent.ACTION_UP) {

                if (System.currentTimeMillis() - startClickTime < ViewConfiguration.getTapTimeout()) {

                    // Touch was a simple tap
                    return true;

                } else {

                    // Touch was a not a simple tap.
                    return false;

                }

            }

            return true;
        }

    });

检查ACTION_DOWN和ACTION_UP事件之间的时间是否低于或高于ViewConfiguration.getTapTimeout()

给出的值

Answer 2

您必须返回false以指示该事件未被使用

使视图拦截水龙头但不滚动事件

2 个答案: