Question

我有2个布局（比如说上，下）.down布局包含一些图像网格，它们应该被拖到上面。在将单个图像从下向上拖动到其工作正常但在拖动2个或更多图像时，它们会分散。如何实现拖放从多个图像向下拖动，甚至重叠？

编辑：已添加代码

//drag code

img1.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {

           id=img1.getId();

            ClipData.Item item = new ClipData.Item((CharSequence) v.getTag());
            String[] mimeTypes = {ClipDescription.MIMETYPE_TEXT_PLAIN};
            ClipData dragData = new ClipData(v.getTag().toString(), mimeTypes, item);
            View.DragShadowBuilder myShadow = new View.DragShadowBuilder(img1);
            v.startDrag(dragData, myShadow, null, 0);
            img1.setVisibility(View.INVISIBLE);
            return true;
        }
    });

//其他图片的类似代码

//drop code
//linearLayout is the layout to which img1,img2 must be dragged and dropped

 linearLayout.setOnDragListener(new View.OnDragListener() {

        @Override
        public boolean onDrag(View view, DragEvent event) {

            int action = event.getAction();

            switch (event.getAction()) {

                case DragEvent.ACTION_DRAG_STARTED:
                    break;
                case DragEvent.ACTION_DRAG_ENTERED:
                    break;
                case DragEvent.ACTION_DRAG_EXITED:
                    break;
                case DragEvent.ACTION_DROP:

                    switch(id){

                        case (R.id.img1):

                            float X1 = event.getX();
                            float Y1 = event.getY();

                            ViewGroup owner1 = (ViewGroup) img1.getParent();
                            owner1.removeView(img1);
                            LinearLayout container1 = (LinearLayout)view;
                            container1.addView(img1);
                            img1.setX(X1 - (img1.getWidth() / 2));
                            img1.setY(Y1 - (img1.getHeight() / 2));
                            img1.setVisibility(View.VISIBLE);
                            break;

                        case R.id.img2:

                            float X2 = event.getX();
                            float Y2 = event.getY();

                            ViewGroup owner2 = (ViewGroup)img2.getParent();
                            owner2.removeView(img2);
                            LinearLayout container2 = (LinearLayout)view;
                            container2.addView(img2);
                            img2.setX(X2 - (img2.getWidth() / 2));
                            img2.setY(Y2 - (img2.getHeight() / 2));
                            img2.setVisibility(View.VISIBLE);
                            break;
                            }
                 case DragEvent.ACTION_DRAG_ENDED:

                      if (!event.getResult()) {
                         img1.setVisibility(View.VISIBLE);
                         }
                        if (!event.getResult()) {
                        img2.setVisibility(View.VISIBLE);
                        }

                     break;

                  default:
                      break;
                     }
                return true;
       }
    });

//其他图片的类似代码

Answer 1

我认为问题在于LinearLayout，它在添加多个viewGroup时变得不稳定。我尝试过使用FrameLayout，它解决了我的问题。

实现拖放多个图像分散

1 个答案: