4

A view flipper has 4 list views. When i flip the view flipper using gesture listener implemented on view flipper, it works fine. But I am not able to scroll the list view since the touch event is not able to trickle down from view flipper to list view. Please provide solutions.

private class MyViewFlipper extends ViewFlipper implements OnGestureListener {
    GestureDetector gestureScanner = new GestureDetector(this);
    Context context;

    public MyViewFlipper(Context context) {
        super(context);
        this.context=context;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) { 
        return gestureScanner.onTouchEvent(event);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {  
        return gestureScanner.onTouchEvent(event);
    }

    @Override
    public boolean onDown(MotionEvent arg0) {
        return true;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        try {
            if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) return false;

            // right to left swipe
            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE &&
                Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                this.setOutAnimation(AnimationUtils.loadAnimation(context,R.anim.push_left_out));
                this.setInAnimation(AnimationUtils.loadAnimation(context,R.anim.push_left_in));
                this.showNext();
                return true;
            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE &&
                       Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                this.setOutAnimation(AnimationUtils.loadAnimation(context,R.anim.push_right_out));
                this.setInAnimation(AnimationUtils.loadAnimation(context,R.anim.push_right_in));
                this.showPrevious();
                return true;
            } else if (e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE &&
                       Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                return true;
            } else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE &&
                       Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                return true;
            }
       } catch (Exception e) {
            e.printStackTrace();
            //Toast.makeText(context, "Error Occurred", Toast.LENGTH_LONG);
       }
       return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {

    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        //I want this event to be handled by list view
        this.getCurrentView().findViewWithTag("hierarchy_list").dispatchTouchEvent(e1);

        Log.i(LOG_TAG, "Scroll");
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        //DO something  
        return false;
    }
}
4

2 回答 2

1

最终，我这样做是为了让事件逐渐减少。

        @Override
    public boolean onInterceptTouchEvent(MotionEvent event) { 
        return gestureScanner.onTouchEvent(event);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {  
//
        this.dispatchTouchEvent(event);
        return gestureScanner.onTouchEvent(event);
    }
于 2010-11-21T10:29:19.593 回答
1 
@Override
public boolean onInterceptTouchEvent(MotionEvent event) { 
    gestureScanner.onTouchEvent(event);
    return false;
}

@Override
public boolean onTouchEvent(MotionEvent event) {  
    gestureScanner.onTouchEvent(event);
    return false; 
}

希望届时该事件将被传递。

于 2010-11-19T23:24:35.340 回答