SimpleItemTouchHelperCallback

[shiqikai]

@OverRide
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
// Set movement flags based on the layout manager
if (recyclerView.getLayoutManager() instanceof GridLayoutManager) {
final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
final int swipeFlags = 0;
return makeMovementFlags(dragFlags, swipeFlags);
} else if (viewHolder instanceof ItemTouchHelperViewHolder) {
//Only ViewHolder implents ItemTouchHelperViewHolder can be draged.
final int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
final int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
return makeMovementFlags(dragFlags, swipeFlags);
} else {
//others can not be draged.
final int swipeFlags = 0;
final int dragFlags = 0;
return makeMovementFlags(dragFlags, swipeFlags);
}
}