如何在Android Studio中使用触摸坐标（x，y）获取Gridview子视图

Question

我想通过了解触摸位置（x，y）坐标来获取Gridview的子视图。

case MotionEvent.ACTION_MOVE:
        for(int i = 0; i < gridView.getChildCount(); i++)
            {
                //check if finger position is above any child
                ImageView gridChild = (ImageView) gridView.getChildAt(i);
                if(checkIntersection((int) event.getX(), (int) event.getY(), gridChild.getLeft(), gridChild.getRight(), gridChild.getTop(), gridChild.getBottom())) 
                {
                   gridChild.setImageResource(R.drawable.red_square);
                   break;
                }
        }
break;

我有上面的代码，但这种情况每秒发生多次，我相信它太强烈了。我想如果我能够通过使用触摸x，y坐标来获取用户正在触摸的子View对象，我不需要遍历所有孩子以找到他们正在触摸的那个。

checkIntersection（）只是给出true或false，具体取决于手指位置是否位于Gridview子对象的矩形中。 Image showing how the checkIntersection function works.

更新： 这是整个代码块

//find the gridview view and assing it to a variable
        final GridView gridView = (GridView) findViewById(R.id.gridView_boxes);
        gridView.setAdapter(new ImageAdapter(this));

        //when user lifts finger off the screen, reset all boxes
        gridView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {

                int action = event.getActionMasked();

                switch (action) {
                    //when finger is lifted off the gridView object
                    case MotionEvent.ACTION_UP:
                        //TODO after user lifts finger check if the path they chose has no obstacles
                        for (int i = 0; i < gridView.getChildCount(); i++)
                        {
                            ImageView gridChild = (ImageView) gridView.getChildAt(i);
                            gridChild.setImageResource(R.drawable.blue_square);
                        }
                        Log.d("SMEMS", "UP " + String.valueOf(action));
                        break;
                    //when finger touches the gridView
                    case MotionEvent.ACTION_DOWN:
                        //loop through all childs
                        for(int i = 0; i < gridView.getChildCount(); i++)
                        {
                            //check if finger position is above any child
                            ImageView gridChild = (ImageView) gridView.getChildAt(i);
                            if(checkIntersection((int) event.getX(), (int) event.getY(), gridChild.getLeft(), gridChild.getRight(), gridChild.getTop(), gridChild.getBottom())) {
                                gridChild.setImageResource(R.drawable.red_square);
                                break;
                            }
                        }
                        Log.d("SMEMS", "DOWN. Y value: " + String.valueOf(event.getY()) + ", X value: " + String.valueOf(event.getX()));
                        break;
                    case MotionEvent.ACTION_MOVE:
                        //TODO check if there is a more efficient way of doing this without a loop
                        //loop through all childs
                        for(int i = 0; i < gridView.getChildCount(); i++)
                        {
                            //check if finger position is above any child
                            ImageView gridChild = (ImageView) gridView.getChildAt(i);
                            if(checkIntersection((int) event.getX(), (int) event.getY(), gridChild.getLeft(), gridChild.getRight(), gridChild.getTop(), gridChild.getBottom())) {
                                gridChild.setImageResource(R.drawable.red_square);
                                break;
                            }
                        }
                        break;
                }
                return true;
            }
        });