Recyclerview Drag and Drop ontouch

Question

I have used ItemTouchHelper to implement drag and drop in recyclerview. It works fine. But it is working only on long press. I need to do it with onTouch

ItemTouchHelper.Callback itemTouchHelperCallback = new ItemTouchHelper.Callback() {
    public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
        Collections.swap(strings, viewHolder.getAdapterPosition(), target.getAdapterPosition());
        adapter.notifyItemMoved(viewHolder.getAdapterPosition(), target.getAdapterPosition());
        return true;
    }

    @Override
    public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
        //TODO
    }

   //defines the enabled move directions in each state (idle, swiping, dragging).
     @Override
     public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
         return makeFlag(ItemTouchHelper.ACTION_STATE_DRAG,
             ItemTouchHelper.DOWN | ItemTouchHelper.UP | ItemTouchHelper.START | ItemTouchHelper.END);
         }
    };

This is the code I used. Please help me!!!

Answer 1

1. Override ItemTouchHelper's isLongPressDragEnabled and return false

   https://developer.android.com/reference/android/support/v7/widget/helper/ItemTouchHelper.Callback#isLongPressDragEnabled()

   override fun isLongPressDragEnabled(): Boolean = false

2. Add a callback to ViewHolder's implementation and use this

   buttonToDrag.setOnTouchListener { v, event ->
       listener.onTouch(this, event)
       false
   }
   

3. In the activity or fragment, use startDrag

   private lateinit var itemTouchHelper: ItemTouchHelper
   
   override fun onTouch(viewHolder: RecyclerView.ViewHolder, event: MotionEvent) {
       if (event.actionMasked == MotionEvent.ACTION_DOWN) {
           itemTouchHelper.startDrag(viewHolder)
       }
   }
   

I found the implementation in the doc of https://developer.android.com/reference/android/support/v7/widget/helper/ItemTouchHelper#startdrag

I've tried it personally and it works like a charm.