Question

当我以水平方式使用捏拉缩放手势时，总是在达到按下的坐标和释放坐标的某个差异时调用滑动功能。

我该如何解决这个问题？

这是webview的设置

    view.getSettings().setBuiltInZoomControls(true);
    view.getSettings().setSupportZoom(true); 
    view.getSettings().setDisplayZoomControls(false);

滑动功能

    protected void swipePage(View v, MotionEvent event, int book) {
    int action = MotionEventCompat.getActionMasked(event);

    switch (action) {
    case (MotionEvent.ACTION_DOWN):
        swipeOriginX = event.getX();
        swipeOriginY = event.getY();
        break;

    case (MotionEvent.ACTION_UP):
        int quarterWidth = (int) (screenWidth * 0.3);
        float diffX = swipeOriginX - event.getX();
        float diffY = swipeOriginY - event.getY();
        float absDiffX = Math.abs(diffX);
        float absDiffY = Math.abs(diffY);

        if ((diffX > quarterWidth) && (absDiffX > absDiffY)) {
            try {
                navigator.goToNextChapter(index);
            } catch (Exception e) {
                errorMessage(getString(R.string.error_cannotTurnPage));
            }
        } else if ((diffX < -quarterWidth) && (absDiffX > absDiffY)) {
            try {
                navigator.goToPrevChapter(index);
            } catch (Exception e) {
                errorMessage(getString(R.string.error_cannotTurnPage));
            }
        }
        break;
    }
}

Answer 1

检查是否有效 - 如果有单指触摸，则检查if条件，然后只进行滑动。将“event”变量更改为您的本地变量。

 if(event.getPointerCount() == 1)
  {
    switch (action) {
     case (MotionEvent.ACTION_DOWN):
          swipeOriginX = event.getX();
          swipeOriginY = event.getY();
           break;

    case (MotionEvent.ACTION_UP):

    int quarterWidth = (int) (screenWidth * 0.3);
    float diffX = swipeOriginX - event.getX();
    float diffY = swipeOriginY - event.getY();
    float absDiffX = Math.abs(diffX);
    float absDiffY = Math.abs(diffY);

    if ((diffX > quarterWidth) && (absDiffX > absDiffY)) {
        x = 1;
        try {
            navigator.goToNextChapter(index);
            x = 0;
        } catch (Exception e) {
            x = 1;
            errorMessage(getString(R.string.error_cannotTurnPage));
        }
    } else if ((diffX < -quarterWidth) && (absDiffX > absDiffY)) {
        x = 1;
        try {
            navigator.goToPrevChapter(index);
            x = 0;
        } catch (Exception e) {
            x = 1;
            errorMessage(getString(R.string.error_cannotTurnPage));
        }


    break;    
    }
  }
}
else if(event.getPointerCount()==2)
 {
   // code for pinch zoom
 }

如何在不调用webview中的滑动功能的情况下使用捏缩放？

1 个答案: