question: private boolean handleTouchEvent ( MotionEvent ev ) { DeviceProfile grid = mLauncher . getDeviceProfile ( ) ; int x = ( int ) ev . getX ( ) ; int y = ( int ) ev . getY ( ) ; switch ( ev . getAction ( ) ) { case MotionEvent . ACTION_DOWN : if ( ! mContentBounds . isEmpty ( ) ) { Rect tmpRect = new Rect ( mContentBounds ) ; tmpRect . inset ( - grid . allAppsIconSizePx / 2 , 0 ) ; if ( ev . getX ( ) < tmpRect . left || ev . getX ( ) > tmpRect . right ) { mBoundsCheckLastTouchDownPos . set ( x , y ) ; return true ; } } else { if ( ev . getX ( ) < getPaddingLeft ( ) || ev . getX ( ) > ( getWidth ( ) - getPaddingRight ( ) ) ) { mBoundsCheckLastTouchDownPos . set ( x , y ) ; return true ; } } break ; case MotionEvent . ACTION_UP : if ( mBoundsCheckLastTouchDownPos . x > - 1 ) { ViewConfiguration viewConfig = ViewConfiguration . get ( getContext ( ) ) ; float dx = ev . getX ( ) - mBoundsCheckLastTouchDownPos . x ; float dy = ev . getY ( ) - mBoundsCheckLastTouchDownPos . y ; float distance = ( float ) Math . hypot ( dx , dy ) ; if ( distance < viewConfig . getScaledTouchSlop ( ) ) { Launcher launcher = ( Launcher ) getContext ( ) ; launcher . showWorkspace ( true ) ; return true ; } } case MotionEvent . ACTION_CANCEL : mBoundsCheckLastTouchDownPos . set ( - 1 , - 1 ) ; break ; } return false ; }
target:  Handles the touch events to dismiss all apps when clicking outside the bounds of the recycler view.