added functions for managing list: add item, remove item ...

Author: horaciocome1

README.md

@@ -74,6 +74,29 @@ SimpleRecyclerViewAdapter<DataType> adapter = new SimpleRecyclerViewAdapter<>();
 No casting need.
 _I suggest you to use Android Studio code completion, to implement **onBindViewHolder()**._
 
+### Adding items to the list
+```kotlin
+adapter.addItem(item)
+```
+
+
+### Update items in the list
+```kotlin
+adapter.setItem(item, position)
+```
+
+### Removing items from the list
+```kotlin
+adapter.removeItem(position)
+```
+
+### Restoring previously removed item to the list
+```kotlin
+adapter.restoreItem(item, position)
+```
+
+Notice that these calls might require public _adapter_ object/variable
+
 ### Troubleshooting
 Naturally, the adapter needs an **item_layout**, an **list** and an **onBindViewHolder()** implementation to display the list on screen.
 NONE OF THIS ARE OPTIONAL, so not setting them may lead to runtime app crash.

simplerecyclerviewadapter/build.gradle

@@ -9,8 +9,8 @@ android {
     defaultConfig {
         minSdkVersion 14
         targetSdkVersion 28
-        versionCode 3
-        versionName "0.1.2"
+        versionCode 4
+        versionName "0.1.3"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 

simplerecyclerviewadapter/src/main/java/io/github/horaciocome1/simplerecyclerviewadapter/RecyclerViewUtils.kt

@@ -17,9 +17,14 @@
 package io.github.horaciocome1.simplerecyclerviewadapter
 
 import android.view.View
-import android.widget.TextView
-import androidx.recyclerview.widget.RecyclerView
 
 fun <T : View?> SimpleRecyclerViewAdapter.ViewHolder.findViewById(viewId: Int): T {
     return this.itemView.findViewById<T>(viewId)
-}
+}
+
+fun <T> sdvjoiidfnvs(adapter: SimpleRecyclerViewAdapter<T>, item: T) {
+    adapter.addItem(item)
+    adapter.setItem(item, 13)
+    adapter.removeItem(13)
+    adapter.restoreItem(item, 13)
+}

simplerecyclerviewadapter/src/main/java/io/github/horaciocome1/simplerecyclerviewadapter/SimpleRecyclerViewAdapter.kt

@@ -22,27 +22,43 @@ import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.RecyclerView.Adapter
 
+const val NO_ITEM_LAYOUT = -1
+
 class SimpleRecyclerViewAdapter<DataType> : Adapter<SimpleRecyclerViewAdapter.ViewHolder>() {
 
-    var itemLayout: Int = -1
-    var list: List<DataType> = ArrayList()
+    var itemLayout: Int = NO_ITEM_LAYOUT
+    var list = ArrayList<DataType>()
     private var onBind = { _: ViewHolder, _: DataType -> Unit}
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         val view = LayoutInflater.from(parent.context).inflate(itemLayout, parent, false)
         return ViewHolder(view)
     }
 
-    override fun getItemCount(): Int {
-        return list.size
+    override fun getItemCount(): Int { return list.size }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) { onBind(holder, list[position]) }
+
+    fun setOnBindViewHolder(onBind: (SimpleRecyclerViewAdapter.ViewHolder, DataType) -> Unit) { this.onBind = onBind }
+
+    fun addItem(item: DataType) {
+        list.add(item)
+        notifyItemInserted(list.size)
+    }
+
+    fun setItem(item: DataType, position: Int) {
+        list[position] = item
+        notifyItemChanged(position)
     }
 
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        onBind(holder, list[position])
+    fun removeItem(position: Int) {
+        list.removeAt(position)
+        notifyItemRemoved(position)
     }
 
-    fun setOnBindViewHolder(onBind: (SimpleRecyclerViewAdapter.ViewHolder, DataType) -> Unit) {
-        this.onBind = onBind
+    fun restoreItem(item: DataType, position: Int) {
+        list.add(position, item)
+        notifyItemInserted(position)
     }
 
     class ViewHolder(view: View) : RecyclerView.ViewHolder(view)