Android drag and drop

DragAndDropExample.java

dropView.setOnDragListener((view, event) -> {
  int action = event.getAction();
  switch (event.getAction()) {
    case DragEvent.ACTION_DRAG_STARTED:
      // nothing
      break;
    case DragEvent.ACTION_DRAG_ENTERED:
      // on entered view
      break;
    case DragEvent.ACTION_DRAG_EXITED:
      // on exited view
      break;
    case DragEvent.ACTION_DROP:
      // on dropped in view
      break;
    case DragEvent.ACTION_DRAG_ENDED:
      // on drag ended
    default:
      break;
  }
  return true;
});

dragView.setOnTouchListener((view, motionEvent) ->
    {
      if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
        // drag started
        ClipData data = ClipData.newPlainText("", "");
        View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(
            view);
        view.startDrag(data, shadowBuilder, view, 0);
        
        return true;
      } else {
        return false;
      }
    }
);