Android onDrag移动时如何更改移动视图的背景

Question

我正在使用相对布局。我需要在移动图像时更改背景图像，移动到特定位置。但是当布局移动（拖动）时，我无法访问移动视图和更改背景。

感谢。

class MyDragListener implements OnDragListener {

    @Override
    public boolean onDrag(View v, DragEvent event) {
        int action = event.getAction();
        switch (event.getAction()) {
            case DragEvent.ACTION_DRAG_STARTED:
                // do nothing
                break;
            case DragEvent.ACTION_DRAG_ENTERED:

                break;
            case DragEvent.ACTION_DRAG_EXITED:

                break;
            case DragEvent.ACTION_DRAG_LOCATION:
                //come here when moving view
                break;
            case DragEvent.ACTION_DROP:

                View view = (View) event.getLocalState();
                ViewGroup owner = (ViewGroup) view.getParent();
                owner.removeView(view);
                RelativeLayout container = (RelativeLayout) v;
                container.addView(view);
                view.setVisibility(View.VISIBLE);
                break;
            case DragEvent.ACTION_DRAG_ENDED:

            default:
                break;
        }
        return true;
    }
}

Answer 1

您可以使用以下代码

    case DragEvent.ACTION_DRAG_STARTED:
            ((RelativeLayout) v).setBackgroundColor(Color.RED);
            break;

和ACTION_DROP如果需要，您可以再次更改。