WebView中的Android singleTap/OnClick

Question

我正在使用Html字符串加载Web视图,我想在用户点击Web视图时显示导航按钮,我尝试使用onTouch监听器,在滚动和点击时触摸事件引发但 我想捕获单击/ clickEvent,而不是滚动事件触摸...,我为WebView和LinearLayout实现了SetOnClickListener,它们都没有为我工作 任何关于此的帮助

Answer 1

WebView不支持OnClickListener.而且即使网页上没有任何反应,它也会消耗触摸事件,因此祖先视图(如您的LinearLayout)没有任何机会产生OnClick事件.非常不幸.

作为一种解决方法,我扩展了一个RelativeLayout并将其置于WebView其中.在RelativeLayout我已经覆盖onInterceptTouchEvent并正在寻找轻敲事件.如果检测到点击,则调用RelativeLayout's' .OnClickListenerperformClick()

public class TapAwareRelativeLayout extends RelativeLayout {

    private final float MOVE_THRESHOLD_DP = 20 * getResources().getDisplayMetrics().density;

    private boolean mMoveOccured;
    private float mDownPosX;
    private float mDownPosY;

public TapAwareRelativeLayout(Context context) {
    super(context);
}

public TapAwareRelativeLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {

    final int action = ev.getAction();
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mMoveOccured = false;
        mDownPosX = ev.getX();
        mDownPosY = ev.getY();
        break;
    case MotionEvent.ACTION_UP:
        if (!mMoveOccured) {
            // TAP occured
            performClick();
        }
        break;
    case MotionEvent.ACTION_MOVE:
        if (Math.abs(ev.getX() - mDownPosX) > MOVE_THRESHOLD_DP || Math.abs(ev.getY() - mDownPosY) > MOVE_THRESHOLD_DP) {
            mMoveOccured = true;
        }
        break;

    }
    return super.onInterceptTouchEvent(ev);
}

}

Answer 2

从这个页面：http://www.codeshogun.com/blog/2009/04/16/how-to-implement-swipe-action-in-android/

看来触摸事件必须被正确捕获。看一下这个：

@Override
public boolean dispatchTouchEvent(MotionEvent e){
    super.dispatchTouchEvent(e);
    return mGestureDetector.onTouchEvent(e);
}