How to realize multiple ImageView dragging and exchanging pictures in live broadcasting room

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The first is the XML file code:

It is important to note that the two ImageView should be installed separately with Layout, and the reason will be explained later.

Next is initialization: mImg0 = findViewById (R.id.release_img0); mImg1 = findViewById (R.id.release_img1); mImg0_layout = findViewById (R.id.release_img0_layout); mImg1_layout = findViewById (R.id.release_img1_layout); / / add touch snooping for ImageView and drag snooping for their respective parent layouts mImg0.setOnTouchListener (ImgUtils.MyTouchEvent); mImg0_layout.setOnDragListener (ImgUtils.MyDragListener); mImg1.setOnTouchListener (ImgUtils.MyTouchEvent); mImg1_layout.setOnDragListener (ImgUtils.MyDragListener) Monitoring details: public class ImgUtils {private static long lastTime; public static View.OnTouchListener MyTouchEvent = new View.OnTouchListener () {@ Override public boolean onTouch (View v, MotionEvent event) {if (event.getAction () = = MotionEvent.ACTION_DOWN) {LogUtils.loge ("ACTION_DOWN"); long lastTime1 = System.currentTimeMillis (); lastTime=lastTime1 ClipData data = ClipData.newPlainText ("", "); View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder (v); v.startDrag (data, shadowBuilder, v, 0); if ((lastTime1-lastTime)