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sample implementation

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This commit is contained in:
Adrian Kuta 2020-01-21 23:27:14 +01:00
parent e019238c2c
commit b3850a542d
12 changed files with 348 additions and 7 deletions
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4
app/build.gradle
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@ -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-beta01'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

88
app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt Normal file
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@ -0,0 +1,88 @@
package com.github.adriankuta
import android.util.Log
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, nestLevel)
}
sealed class ExpandableViewHolder(val itemView: View) : RecyclerView.ViewHolder(itemView) {
class Level1(private val binding: ItemLevel1Binding) : ExpandableViewHolder(binding.root) {
override fun bind(node: ExpandableTreeNode<String>, nestLevel: Int) {
binding.node = node
}
}
class Level2(private val binding: ItemLevel2Binding) : ExpandableViewHolder(binding.root) {
override fun bind(node: ExpandableTreeNode<String>, nestLevel: Int) {
binding.node = node
binding.isLastItem = isLastItem(node)
}
}
class Level3(private val binding: ItemLevel3Binding) : ExpandableViewHolder(binding.root) {
override fun bind(node: ExpandableTreeNode<String>, nestLevel: Int) {
binding.node = node
binding.isLastItem = isLastItem(node)
}
}
abstract fun bind(node: ExpandableTreeNode<String>, nestLevel: Int)
fun isLastItem(node: ExpandableTreeNode<String>): Boolean {
val parent = node.parent ?: throw IllegalArgumentException("This node hasn't parent")
val childrenSize = parent.children.size
Log.d("DEBUG_TAG", node.value)
return parent.children[childrenSize - 1] == node
}
}
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)
}
}

28
app/src/main/java/com/github/adriankuta/MainActivity.kt
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@ -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)
}
}

9
app/src/main/res/drawable/ic_expand_less_black_24dp.xml Normal file
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@ -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>

9
app/src/main/res/drawable/ic_expand_more_black_24dp.xml Normal file
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@ -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>

18
app/src/main/res/drawable/ic_last_element.xml Normal file
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@ -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>

18
app/src/main/res/drawable/ic_middle_element.xml Normal file
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@ -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>

13
app/src/main/res/drawable/ic_vertical_line.xml Normal file
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@ -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>

12
app/src/main/res/layout/activity_main.xml
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@ -6,13 +6,13 @@
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

38
app/src/main/res/layout/item_level_1.xml Normal file
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@ -0,0 +1,38 @@
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools">
<ImageView
android:id="@+id/expand_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:scaleType="centerInside"
android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:text="@{node.value}"
tools:text="@tools:sample/full_names"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@id/expand_icon"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>

53
app/src/main/res/layout/item_level_2.xml Normal file
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@ -0,0 +1,53 @@
<?xml version="1.0" encoding="utf-8"?>
<layout>
<data>
<variable
name="isLastItem"
type="Boolean" />
<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/tree_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:src="@{isLastItem ? @drawable/ic_last_element : @drawable/ic_middle_element}"
tools:src="@drawable/ic_last_element"
android:tint="@color/colorAccent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/expand_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:scaleType="centerInside"
android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
tools:src="@drawable/ic_expand_less_black_24dp"
app:layout_constraintStart_toEndOf="@id/tree_icon"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:text="@{node.value}"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
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>

65
app/src/main/res/layout/item_level_3.xml Normal file
View File

@ -0,0 +1,65 @@
<?xml version="1.0" encoding="utf-8"?>
<layout>
<data>
<variable
name="isLastItem"
type="Boolean" />
<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/line"
android:layout_width="48dp"
android:layout_height="48dp"
android:src="@drawable/ic_vertical_line"
android:tint="@color/colorAccent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="@+id/tree_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:src="@{isLastItem ? @drawable/ic_last_element : @drawable/ic_middle_element}"
android:tint="@color/colorAccent"
app:layout_constraintStart_toEndOf="@id/line"
app:layout_constraintTop_toTopOf="parent"
tools:src="@drawable/ic_last_element" />
<ImageView
android:id="@+id/expand_icon"
android:layout_width="48dp"
android:layout_height="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_constraintStart_toEndOf="@id/tree_icon"
app:layout_constraintTop_toTopOf="parent"
tools:src="@drawable/ic_expand_less_black_24dp" />
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="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>