Merge pull request #1 from AdrianKuta/sample

Sample

README.md

@@ -4,8 +4,11 @@
 [![License](https://img.shields.io/github/license/AdrianKuta/Expandable-RecyclerView?style=plastic)](https://github.com/AdrianKuta/Expandable-RecyclerView/blob/master/LICENSE)
 [![CircleCI](https://img.shields.io/circleci/build/github/AdrianKuta/Expandable-RecyclerView/master?label=CircleCI&style=plastic&logo=circleci)](https://circleci.com/gh/AdrianKuta/Expandable-RecyclerView)
 
-Library is currently during implementation! It is **not** ready to use yet :/
+<img src="https://github.com/AdrianKuta/Expandable-RecyclerView/blob/master/Demo.gif" width="720" />
+
+This RecyclerViewAdapter use Tree(Data Structure) to keep all objects.
+## Download
+
+    implementation "com.github.adriankuta:expandable-recyclerView:$latest_versions"
     
-Final version will be released soon.
    
-![Release date](https://img.shields.io/date/1580493319?label=Expected%20release&style=for-the-badge)

app/build.gradle

@@ -21,6 +21,9 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+    dataBinding {
+        enabled = true
+    }
 }
 
 dependencies {
@@ -29,6 +32,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.core:core-ktx:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.github.adriankuta:expandable-recyclerView:0.0.1-beta02'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt

@@ -0,0 +1,97 @@
+package com.github.adriankuta
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.github.adriankuta.databinding.ItemLevel1Binding
+import com.github.adriankuta.databinding.ItemLevel2Binding
+import com.github.adriankuta.databinding.ItemLevel3Binding
+import com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode
+import com.github.adriankuta.expandable_recyclerview.MultilevelRecyclerViewAdapter
+import com.github.adriankuta.expandable_recyclerview.expandableTree
+
+class ExpandableAdapter :
+    MultilevelRecyclerViewAdapter<String, ExpandableAdapter.ExpandableViewHolder>() {
+
+    private var tree: ExpandableTreeNode<String>? = null
+
+    fun setTree(tree: ExpandableTreeNode<String>) {
+        this.tree = tree
+        notifyDataSetChanged()
+    }
+
+    override fun getTreeNodes(): ExpandableTreeNode<String> = tree ?: expandableTree("") {}
+
+    override fun onCreateViewHolder(parent: ViewGroup, nestLevel: Int): ExpandableViewHolder {
+        return when (nestLevel) {
+            1 -> ExpandableViewHolder.Level1(parent.inflateLevel1())
+            2 -> ExpandableViewHolder.Level2(parent.inflateLevel2())
+            3 -> ExpandableViewHolder.Level3(parent.inflateLevel3())
+            else -> throw IllegalArgumentException("Not implemented ViewHolder for nest level: $nestLevel")
+        }
+    }
+
+    override fun onBindViewHolder(
+        holder: ExpandableViewHolder,
+        treeNode: ExpandableTreeNode<String>,
+        nestLevel: Int
+    ) {
+        holder.bind(treeNode) {
+            toggleGroup(it)
+        }
+    }
+
+    sealed class ExpandableViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+
+        class Level1(private val binding: ItemLevel1Binding) : ExpandableViewHolder(binding.root) {
+            override fun bind(
+                node: ExpandableTreeNode<String>,
+                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+            ) {
+                binding.node = node
+                binding.root.setOnClickListener { onClickListener?.invoke(node) }
+            }
+        }
+
+        class Level2(private val binding: ItemLevel2Binding) : ExpandableViewHolder(binding.root) {
+            override fun bind(
+                node: ExpandableTreeNode<String>,
+                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+            ) {
+                binding.node = node
+                binding.root.setOnClickListener { onClickListener?.invoke(node) }
+            }
+        }
+
+        class Level3(private val binding: ItemLevel3Binding) : ExpandableViewHolder(binding.root) {
+            override fun bind(
+                node: ExpandableTreeNode<String>,
+                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+            ) {
+                binding.node = node
+                binding.root.setOnClickListener { onClickListener?.invoke(node) }
+            }
+        }
+
+
+        abstract fun bind(
+            node: ExpandableTreeNode<String>,
+            onClickListener: ((ExpandableTreeNode<String>) -> Unit)? = null
+        )
+
+    }
+
+    private fun ViewGroup.inflateLevel1(): ItemLevel1Binding {
+        return ItemLevel1Binding.inflate(LayoutInflater.from(context), this, false)
+    }
+
+    private fun ViewGroup.inflateLevel2(): ItemLevel2Binding {
+        return ItemLevel2Binding.inflate(LayoutInflater.from(context), this, false)
+    }
+
+    private fun ViewGroup.inflateLevel3(): ItemLevel3Binding {
+        return ItemLevel3Binding.inflate(LayoutInflater.from(context), this, false)
+    }
+
+}

app/src/main/java/com/github/adriankuta/MainActivity.kt

@@ -1,12 +1,38 @@
 package com.github.adriankuta
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.github.adriankuta.expandable_recyclerview.expandableTree
+import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+
+        val tree = expandableTree("World") {
+            child("North America") {
+                child("USA")
+            }
+            child("Europe") {
+                child("Poland") {
+                    child("Warsaw")
+                }
+                child("Germany")
+            }
+            child("Asia") {
+                child("China")
+            }
+        }
+
+        val adapter = ExpandableAdapter()
+        recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.VERTICAL, false)
+        recyclerView.adapter = adapter
+
+        adapter.setTree(tree)
     }
 }

app/src/main/res/drawable/ic_expand_less_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,8l-6,6 1.41,1.41L12,10.83l4.59,4.58L18,14z"/>
+</vector>

app/src/main/res/drawable/ic_expand_more_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M16.59,8.59L12,13.17 7.41,8.59 6,10l6,6 6,-6z"/>
+</vector>

app/src/main/res/drawable/ic_last_element.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+
+    <path
+        android:pathData="M12,0 l0,13z"
+        android:strokeWidth="2"
+        android:strokeColor="@android:color/black" />
+
+    <path
+        android:pathData="M12.5,12 l12,0"
+        android:strokeWidth="2"
+        android:strokeColor="@android:color/black" />
+
+</vector>

app/src/main/res/drawable/ic_middle_element.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+
+    <path
+        android:pathData="M12,0 l0,24z"
+        android:strokeWidth="2"
+        android:strokeColor="@android:color/black" />
+
+    <path
+        android:pathData="M13,12 l11,0"
+        android:strokeWidth="2"
+        android:strokeColor="@android:color/black" />
+
+</vector>

app/src/main/res/drawable/ic_vertical_line.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+
+    <path
+        android:pathData="M12,0 l0,24"
+        android:strokeWidth="2"
+        android:strokeColor="@android:color/black" />
+
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -6,13 +6,13 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <androidx.recyclerview.widget.RecyclerView
-        android:layout_width="wrap_content"
+        android:id="@+id/recyclerView"
-        android:layout_height="wrap_content"
+        android:layout_width="0dp"
-        android:text="Hello World!"
+        android:layout_height="0dp"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/item_level_1.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout>
+
+    <data>
+
+        <variable
+            name="node"
+            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
+
+        <import type="android.view.View" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/expand_icon"
+            android:layout_width="24dp"
+            android:layout_height="0dp"
+            android:scaleType="centerInside"
+            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
+            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
+            app:layout_constraintBottom_toBottomOf="@id/textView"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="@id/textView"
+            tools:src="@drawable/ic_expand_less_black_24dp" />
+
+        <TextView
+            android:id="@+id/textView"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:padding="8dp"
+            android:text="@{node.value}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/expand_icon"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="@tools:sample/full_names" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/layout/item_level_2.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout>
+
+    <data>
+        <variable
+            name="node"
+            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
+
+        <import type="android.view.View" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/expand_icon"
+            android:layout_width="24dp"
+            android:layout_height="0dp"
+            android:layout_marginStart="24dp"
+            android:scaleType="centerInside"
+            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
+            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
+            app:layout_constraintBottom_toBottomOf="@id/textView"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="@id/textView"
+            tools:src="@drawable/ic_expand_less_black_24dp" />
+
+        <TextView
+            android:id="@+id/textView"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:padding="8dp"
+            android:text="@{node.value}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/expand_icon"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_goneMarginStart="48dp"
+            tools:text="@tools:sample/full_names" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/layout/item_level_3.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout>
+
+    <data>
+        <variable
+            name="node"
+            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
+
+        <import type="android.view.View" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:id="@+id/expand_icon"
+            android:layout_width="24dp"
+            android:layout_height="0dp"
+            android:layout_marginStart="48dp"
+            android:scaleType="centerInside"
+            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
+            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
+            app:layout_constraintBottom_toBottomOf="@id/textView"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="@id/textView"
+            tools:src="@drawable/ic_expand_less_black_24dp" />
+
+        <TextView
+            android:id="@+id/textView"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:padding="8dp"
+            app:layout_goneMarginStart="96dp"
+            android:text="@{node.value}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@id/expand_icon"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="@tools:sample/full_names" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

expandable-recyclerview/build.gradle

@@ -15,7 +15,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 29
         versionCode 1
-        versionName "0.0.1-beta02"
+        versionName "1.0.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles 'consumer-rules.pro'

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/ExpandableRecyclerViewAdapter.kt

@@ -3,7 +3,7 @@ package com.github.adriankuta.expandable_recyclerview
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 
-abstract class MultilevelRecyclerViewAdapter<T, VH : RecyclerView.ViewHolder> :
+abstract class ExpandableRecyclerViewAdapter<T, VH : RecyclerView.ViewHolder> :
     RecyclerView.Adapter<VH>() {
 
     private lateinit var treeNodes: ExpandableTreeNode<T>

expandable-recyclerview/src/main/java/com/github/adriankuta/expandable_recyclerview/ExpandableTreeNodeExt.kt

@@ -6,7 +6,7 @@ import com.github.adriankuta.datastructure.tree.ChildDeclaration
 @JvmSynthetic
 inline fun <reified T> expandableTree(
     value: T,
-    childDeclaration: ChildDeclaration<T>
+    childDeclaration: ChildDeclaration<T> = {}
 ): ExpandableTreeNode<T> {
     val treeNode = ExpandableTreeNode(value)
     treeNode.childDeclaration()