半屏上下滑动调节音量，一半调节亮度

Question

我想了解用户是在屏幕右侧还是左侧滑动。我想提高音量是用户在屏幕右侧向上滑动并在用户在屏幕左侧滑动时增加亮度。我能够阅读上、下、右、左滑动，但我想阅读 swipeUpRight、swipeDownRight 和 swipeUpLeft、swipeDownLeft

private final class GestureListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

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

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            boolean result = false;
            try {
                float diffY = e2.getY() - e1.getY();
                float diffX = e2.getX() - e1.getX();
                /*Log.e("TAG", "Y: " + e1.getY() + " , " + e2.getY());
                Log.e("TAG", "diffY: " + diffY);
                Log.e("TAG", "X: " + e1.getX() + " , " + e2.getX());*/
                Log.e("TAG", "X: " + Math.abs(diffX));
                Log.e("TAG", "Y: " + Math.abs(diffY));
                if (Math.abs(diffX) > Math.abs(diffY)) {
                    if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                        if (diffX > 0) {
                            onSwipeRight();
                        } else {
                            onSwipeLeft();
                        }
                        result = true;
                    }
                } else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffY > 0) {
                        onSwipeBottomRight();
                    } else {
                        onSwipeTopRight();
                    }
                    result = true;
                }
            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

Answer 1

您是否尝试过以下方法：

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
   int halfWidth = getWindow().getDecorView().getWidth() / 2;
    if (e1.getX() < halfWidth) {
      //leftSide code
    else{
      //rightSide code
    }
}