ANDROID GRIDVIEW 点击某个位置获取某个单元格

 @Override    public boolean onTouchEvent(MotionEvent event) {          int height=this.getMeasuredHeight();      final int x = (int) event.getX();         final int y = (int) event.getY();     switch(event.getAction())     {     case MotionEvent.ACTION_DOWN:                      mFirstY=y;          motionPosition = this.pointToPosition(x, y);          //Log.i("==MyGridview==onTouchEvent====", "==motionPosition="+motionPosition);          mFirstClickPosition=this.getFirstVisiblePosition();         // Log.i("======onTouchEvent======", "=y="+y);         // Log.i("======onTouchEvent======", "=mFirstClickPosition="+mFirstClickPosition);         if (motionPosition >= 0) {             v = getChildAt(motionPosition - this.getFirstVisiblePosition());            v.startAnimation(m_animation);         }         break;     case MotionEvent.ACTION_MOVE:            mFirstY=y;             Log.i("======onTouchEvent======", "=y="+y);            break;     }     return super.onTouchEvent(event);    }}