Article is on dev.to click below 👇

App's Overview

• In this article I am gonna take you through the development of Swipe Delete Feature, specifically we are going to delete the data present in Cloud Firestore Database in just a swipe.

• Sounds amazing, yes it is amazing, let's start :

Note:

The article only contains the explanation of "swipe to delete" feature, firebase implementation and UI details are not discussed, but I will provide the GitHub from which you can easily go through the complete code of the app.

Table Of Content

• Dependencies Setup
• Code Explanation
• Full code - GitHub Repo
• Writer's Support ❤️

##Dependencies Setup

• I have used an external library to create and decorate the swipe to delete feature, it is called RecyclerViewSwipeDecorator.

dependencies{

   implementation 'it.xabaras.android:recyclerview-swipedecorator:1.2.3'

}

Code Explanation

• Create an ItemTouchHelper.SimpleCallback, instantiate an
  ItemTouchHelper with this callback.
• Copy the code snippet below 👇

Reference - ListActivity.kt

/*

   -> `SimpleCallback` gives us option to tell about the swipe 
       direction.

   -> `ItemTouchHelper.RIGHT or ItemTouchHelper.LEFT`

*/

   val callback: ItemTouchHelper.SimpleCallback = object :

            ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.RIGHT or ItemTouchHelper.LEFT) {

            override fun onMove(

                recyclerView: RecyclerView,

                viewHolder: RecyclerView.ViewHolder,

                target: RecyclerView.ViewHolder

            ): Boolean {

                return false

            }

            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {

              
               //Take action for swiped direction 

               //Delete on swipe left

               //Archive on swipe right

              //Customise according to your mood

         }

• Now let us attach our ItemTouchHelper with the RecyclerView.

• Copy the below 👇 code snippet just outside callback

val itemTouchHelper = ItemTouchHelper(callback)

        itemTouchHelper.attachToRecyclerView(rv)

/* rv - replace with your  recycler view variable name */

• The above code is sufficient for the swipe to delete feature. It will look something like below 👇

• To decorate our swipe feature we will override onChildDraw method. This method has various functions, some of them will be discussed in this article others you can explore here.

• Override onChildDraw method below onSwiped method.

• Copy the below code snippet👇

  override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {



                RecyclerViewSwipeDecorator.Builder(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)

                    .addBackgroundColor(

                        ContextCompat.getColor(

                            this@ListActivity,

                            android.R.color.holo_red_light

                        )

                    )

                    .addActionIcon(R.drawable.ic_baseline_delete_sweep_24)  // add any icon of your choice

                    .addSwipeRightLabel("Deleting the Item") //Label according to your choice

                    .addSwipeLeftLabel("Deleting the Item")

                    .setSwipeRightLabelColor(R.color.white) // behind color on  swiping

                    .setSwipeLeftLabelColor(R.color.white)
                    .create()
                    .decorate()

                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)

            }

• That's all now you can see the magic 😇

GitHub Repository

• Fork the repository for better and easy understanding and for quick learning.

Writer's Support

• If you find the article useful show some ❤️ by staring at some of my repositories and following me on dev.to and github.