disable dragging for some cells

[pixelbendr]

Hello Paul,

so in my app I want users to be able to delete cells that they created. so for example in a group chat you can only delete a message you create. so swipe to dismiss should be disabled for messages which the user didn't create.

Whats the best way to approach this?

[Shusshu]

In "SimpleItemTouchHelperCallback" you can return false in the "isLongPressDragEnabled" method

[iPaulPro]

Sorry @pixelbendr, I seem to have missed the notification for this issue.

You'll notice that getMovementFlags provides a RecyclerView.ViewHolder parameter. This means that it's called for every item in the Adapter, individually. If you want to disable movement for a specific item, you would return 0 for that ViewHolder. Eg.

@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
    final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
    final int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
    return viewHolder.getItemViewType() == YourAdapter.Type.HEADER ? 0 : makeMovementFlags(dragFlags, swipeFlags);
}

[iPaulPro]

Note: You'll also have to add a type check in onMove. Eg

@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder source, RecyclerView.ViewHolder target) {
    // Restrict movement to source view type
    if (source.getItemViewType() != target.getItemViewType()) {
        return false;
    }

    // ...
}