java - android中2个 View 之间的碰撞

Question

我在 android 中有 2 个 View ，它们是可拖动的。我想检测它们之间的碰撞。目前我正在使用此代码来检测碰撞，但我认为它不起作用。请建议需要检查碰撞的内容。

public boolean onTouch(View view, MotionEvent event) {
    final int X = (int) event.getRawX();
    final int Y = (int) event.getRawY();
    switch (event.getAction() & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN:
        RelativeLayout.LayoutParams lParams = (RelativeLayout.LayoutParams) view
                .getLayoutParams();

        _xDelta = X - lParams.leftMargin;
        _yDelta = Y - lParams.topMargin;
        break;
    case MotionEvent.ACTION_UP:
        break;
    case MotionEvent.ACTION_POINTER_DOWN:
        break;
    case MotionEvent.ACTION_POINTER_UP:
        break;
    case MotionEvent.ACTION_MOVE:
        RelativeLayout.LayoutParams ParamsA = (RelativeLayout.LayoutParams) view
                .getLayoutParams();
        ParamsA.leftMargin = X - _xDelta;
        ParamsA.topMargin = Y - _yDelta;
        ParamsA.rightMargin = -250;
        ParamsA.bottomMargin = -250;

        for (int i = 0; i < balls.size(); i++) {
            if (balls.get(i).getTag() != view.getTag()) {
                RelativeLayout.LayoutParams ParamsB = (RelativeLayout.LayoutParams) balls
                        .get(i).getLayoutParams();

                Rect b = new Rect(ParamsB.leftMargin,ParamsB.topMargin,ParamsB.rightMargin,ParamsB.bottomMargin);
                Rect a = new Rect(ParamsA.leftMargin,ParamsA.topMargin,ParamsA.rightMargin,ParamsA.bottomMargin);


                if(a.intersect(b))
                {
                    Toast.makeText(getApplicationContext(), "Collision Detected", Toast.LENGTH_SHORT).show();
                }
            }

        }

        view.setLayoutParams(ParamsA);
        break;
    }
    // _root.invalidate();
    return true;
}

“balls”是放置在屏幕上的“View”类型的数组。

Answer 1

我自己找到了解决方案，它在所有情况下都很完美。

public boolean CheckCollision(View v1,View v2) {
    Rect R1=new Rect(v1.getLeft(), v1.getTop(), v1.getRight(), v1.getBottom());
    Rect R2=new Rect(v2.getLeft(), v2.getTop(), v2.getRight(), v2.getBottom());
    return R1.intersect(R2);
}