Android – 拖放ImageView的副本

Here’s一个完整的例子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;