Android - 拖放ImageView的副本

Question

如何在Drad和Drop上创建ImageView的副本？我在谷歌搜索,但我什么都没发现.

请帮我.

Answer 1

这是一个完整的示例,似乎可以完成您想要做的大部分工作.似乎唯一需要做的更改是创建一个新的ImageView并将位图复制到其中.为此,您需要将类MyDragListener的onDrag()方法更改为如下所示:

case DragEvent.ACTION_DROP:
    // Dropped, reassign View to ViewGroup
    View view = (View) event.getLocalState();
    //ViewGroup owner = (ViewGroup) view.getParent(); // Removed
    //owner.removeView(view);                         // Removed
    LinearLayout container = (LinearLayout) v;

    // Added the following to copy the old view's bitmap to a new ImageView:
    ImageView oldView = (ImageView) view;
    ImageView newView = new ImageView(getApplicationContext());
    newView.setImageBitmap(((BitmapDrawable) oldView.getDrawable()).getBitmap());

    container.addView(newView);                       // Changed to add new view instead

    view.setVisibility(View.VISIBLE);
    break;