Intro
This post is part three of our RecyclerView exercises series and in it, we will show you how to replace the on-click action with a long-press action using an onLongClickListener and an interface. You can check parts one and two.
Exercise
For this exercise we will use the project we created in a previous post, we will just create another branch and work there. In our exercise we have the following scenario: the user is able to long-press on an item in the RecyclerView, and on long-press, we will display a toast message with the name of the item long-pressed. We will be using an onLongClickListener for this action.
First, we will edit the interface in the adapter, to be properly named for the required action:
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interface OnLongCLickListener { fun onItemLongClickListener(item: Item, position: Int) } |
After that, in our bind function in the adapter, we replace the onClickListener with an onLongClickListener:
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container.setOnLongClickListener { onLongClickListener.onItemLongClickListener(item, position) true } |
The boolean is true if the callback consumed the long click, false otherwise.
Next, we override the interface method in our activity to display the toast message:
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override fun onItemLongClickListener(item: Item, position: Int) { Toast.makeText(this, "${item.itemName} long clicked", Toast.LENGTH_SHORT).show() } |
And that’s it, we have replaced our onClickListener logic with onLongClickListener.
You can find the whole project here.