Android--左滑调节屏幕亮度，右滑调节音量大小

核心代码：

@Override public boolean onTouchEvent(MotionEvent event) { LogUtils.i(TAG,"onTouch事件被触发了"); final int screenWidth =ScreenUtils.getScreenWidth(); LogUtils.i(TAG,"screenWidth:" screenWidth); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: startX = event.getX(); startY = event.getY(); break; case MotionEvent.ACTION_MOVE: float endY = event.getY(); float distanceY = startY - endY; if (startX > screenWidth / 2) { //右边 //在这里处理音量 LogUtils.i(TAG,"音量 -"); final double FLING_MIN_DISTANCE = 0.5; final double FLING_MIN_VELOCITY = 0.5; AudioManager am=(AudioManager)getSystemService(