├── app ├── .gitignore ├── src │ └── main │ │ ├── res │ │ ├── values │ │ │ ├── strings.xml │ │ │ ├── colors.xml │ │ │ └── styles.xml │ │ ├── mipmap-hdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-mdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxxhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-anydpi-v26 │ │ │ ├── ic_launcher.xml │ │ │ └── ic_launcher_round.xml │ │ ├── drawable │ │ │ ├── ic_arrow_up_64.xml │ │ │ └── ic_launcher_background.xml │ │ ├── layout │ │ │ ├── activity_main.xml │ │ │ ├── item_content.xml │ │ │ └── item_header.xml │ │ └── drawable-v24 │ │ │ └── ic_launcher_foreground.xml │ │ ├── java │ │ └── dev │ │ │ └── ohoussein │ │ │ └── mergeadaptertutorial │ │ │ ├── data │ │ │ ├── ItemsGroup.kt │ │ │ └── DataProvider.kt │ │ │ ├── MainActivity.kt │ │ │ ├── ExpandableItemAnimator.kt │ │ │ └── ItemsExpandableAdapter.kt │ │ └── AndroidManifest.xml ├── proguard-rules.pro └── build.gradle ├── settings.gradle ├── art └── demo.gif ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .idea ├── codeStyles │ ├── codeStyleConfig.xml │ └── Project.xml ├── vcs.xml ├── misc.xml ├── runConfigurations.xml ├── gradle.xml └── jarRepositories.xml ├── .gitignore ├── README.md ├── gradle.properties ├── gradlew.bat └── gradlew /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | rootProject.name = "ConcatAdapterTutorial" -------------------------------------------------------------------------------- /art/demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/art/demo.gif -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | Expandable ConcatAdapter 3 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: 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/app/src/main/res/mipmap-mdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/OHoussein/Android-Expandable-ConcatAdapter/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/java/dev/ohoussein/mergeadaptertutorial/data/ItemsGroup.kt: -------------------------------------------------------------------------------- 1 | package dev.ohoussein.mergeadaptertutorial.data 2 | 3 | data class ItemsGroup(val title: String, val items: List) -------------------------------------------------------------------------------- /.idea/codeStyles/codeStyleConfig.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 5 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #6200EE 4 | #3700B3 5 | #03DAC5 6 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/caches 5 | /.idea/libraries 6 | /.idea/modules.xml 7 | /.idea/workspace.xml 8 | /.idea/navEditor.xml 9 | /.idea/assetWizardSettings.xml 10 | .DS_Store 11 | /build 12 | /captures 13 | .externalNativeBuild 14 | .cxx 15 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Thu Apr 30 22:50:13 CEST 2020 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_arrow_up_64.xml: -------------------------------------------------------------------------------- 1 | 7 | 10 | 11 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 9 | 10 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Android-Expandable-ConcatAdapter 2 | A sample project that shows how to make an expandable RecyclerView easily with the ConcatAdapter 3 | 4 |
5 | demo 6 |
7 | 8 | # 9 | 10 | Full article is here https://medium.com/codeshake/create-an-expandable-recyclerview-with-the-concatadapter-254fd671fa5b 11 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/java/dev/ohoussein/mergeadaptertutorial/data/DataProvider.kt: -------------------------------------------------------------------------------- 1 | package dev.ohoussein.mergeadaptertutorial.data 2 | 3 | object DataProvider { 4 | 5 | fun getRandomItemsGroup(countItems: Int, suffix: String): ItemsGroup = 6 | ItemsGroup( 7 | title = "Header $suffix", 8 | items = (1..countItems) 9 | .map { 10 | "Item number $it" 11 | } 12 | ) 13 | 14 | fun getRandomItemsGroupList(countGroups: Int): List = 15 | (1..countGroups) 16 | .map { i -> 17 | getRandomItemsGroup(i, i.toString()) 18 | } 19 | } -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 20 | 21 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 8 | 9 | 18 | -------------------------------------------------------------------------------- /app/src/main/res/layout/item_content.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 8 | 19 | -------------------------------------------------------------------------------- /.idea/jarRepositories.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 9 | 10 | 14 | 15 | 19 | 20 | 24 | 25 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | apply plugin: 'kotlin-android' 3 | apply plugin: 'kotlin-android-extensions' 4 | 5 | android { 6 | compileSdkVersion 29 7 | buildToolsVersion "29.0.3" 8 | 9 | defaultConfig { 10 | applicationId "dev.ohoussein.mergeadaptertutorial" 11 | minSdkVersion 21 12 | targetSdkVersion 29 13 | versionCode 1 14 | versionName "1.0" 15 | 16 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 17 | } 18 | 19 | buildTypes { 20 | release { 21 | minifyEnabled false 22 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 23 | } 24 | } 25 | } 26 | 27 | dependencies { 28 | def android_x_version = "1.2.0-alpha02" 29 | 30 | implementation fileTree(dir: "libs", include: ["*.jar"]) 31 | implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" 32 | implementation "androidx.appcompat:appcompat:1.3.0-alpha02" 33 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 34 | implementation "androidx.recyclerview:recyclerview:1.2.0-alpha06" 35 | 36 | 37 | 38 | } -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | org.gradle.jvmargs=-Xmx2048m 10 | # When configured, Gradle will run in incubating parallel mode. 11 | # This option should only be used with decoupled projects. More details, visit 12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 13 | # org.gradle.parallel=true 14 | # AndroidX package structure to make it clearer which packages are bundled with the 15 | # Android operating system, and which are packaged with your app"s APK 16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn 17 | android.useAndroidX=true 18 | # Automatically convert third-party libraries to use AndroidX 19 | android.enableJetifier=true 20 | # Kotlin code style for this project: "official" or "obsolete": 21 | kotlin.code.style=official -------------------------------------------------------------------------------- /app/src/main/java/dev/ohoussein/mergeadaptertutorial/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package dev.ohoussein.mergeadaptertutorial 2 | 3 | import android.os.Bundle 4 | import androidx.appcompat.app.AppCompatActivity 5 | import androidx.recyclerview.widget.ConcatAdapter 6 | import androidx.recyclerview.widget.LinearLayoutManager 7 | import dev.ohoussein.mergeadaptertutorial.data.DataProvider 8 | import kotlinx.android.synthetic.main.activity_main.* 9 | 10 | class MainActivity : AppCompatActivity() { 11 | override fun onCreate(savedInstanceState: Bundle?) { 12 | super.onCreate(savedInstanceState) 13 | setContentView(R.layout.activity_main) 14 | 15 | val itemsGroupList = DataProvider.getRandomItemsGroupList(5) 16 | val adapters: List = itemsGroupList.map { itemsGroup -> 17 | ItemsExpandableAdapter(itemsGroup) 18 | } 19 | val concatAdapterConfig = ConcatAdapter.Config.Builder() 20 | .setIsolateViewTypes(false) 21 | .build() 22 | val concatAdapter = ConcatAdapter(concatAdapterConfig, adapters) 23 | 24 | with(rvItems) { 25 | layoutManager = LinearLayoutManager(context) 26 | itemAnimator = 27 | ExpandableItemAnimator() 28 | adapter = concatAdapter 29 | } 30 | 31 | } 32 | } -------------------------------------------------------------------------------- /app/src/main/res/layout/item_header.xml: -------------------------------------------------------------------------------- 1 | 2 | 10 | 11 | 24 | 25 | 34 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 8 | 9 | 15 | 18 | 21 | 22 | 23 | 24 | 30 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /app/src/main/java/dev/ohoussein/mergeadaptertutorial/ExpandableItemAnimator.kt: -------------------------------------------------------------------------------- 1 | package dev.ohoussein.mergeadaptertutorial 2 | 3 | import android.animation.Animator 4 | import android.animation.AnimatorListenerAdapter 5 | import android.animation.ObjectAnimator 6 | import android.view.View 7 | import androidx.recyclerview.widget.DefaultItemAnimator 8 | import androidx.recyclerview.widget.RecyclerView 9 | 10 | class ExpandableItemAnimator : DefaultItemAnimator() { 11 | 12 | override fun recordPreLayoutInformation( 13 | state: RecyclerView.State, 14 | viewHolder: RecyclerView.ViewHolder, 15 | changeFlags: Int, 16 | payloads: MutableList 17 | ): ItemHolderInfo { 18 | return if (viewHolder is ItemsExpandableAdapter.ViewHolder.HeaderVH) { 19 | HeaderItemInfo().also { 20 | it.setFrom(viewHolder) 21 | } 22 | } else { 23 | super.recordPreLayoutInformation(state, viewHolder, changeFlags, payloads) 24 | } 25 | } 26 | 27 | override fun recordPostLayoutInformation( 28 | state: RecyclerView.State, 29 | viewHolder: RecyclerView.ViewHolder 30 | ): ItemHolderInfo { 31 | return if (viewHolder is ItemsExpandableAdapter.ViewHolder.HeaderVH) { 32 | HeaderItemInfo().also { 33 | it.setFrom(viewHolder) 34 | } 35 | } else { 36 | super.recordPostLayoutInformation(state, viewHolder) 37 | } 38 | } 39 | 40 | override fun animateChange( 41 | oldHolder: RecyclerView.ViewHolder, 42 | holder: RecyclerView.ViewHolder, 43 | preInfo: ItemHolderInfo, 44 | postInfo: ItemHolderInfo 45 | ): Boolean { 46 | if (preInfo is HeaderItemInfo && postInfo is HeaderItemInfo && holder is ItemsExpandableAdapter.ViewHolder.HeaderVH) { 47 | ObjectAnimator 48 | .ofFloat( 49 | holder.icExpand, 50 | View.ROTATION, 51 | preInfo.arrowRotation, 52 | postInfo.arrowRotation 53 | ) 54 | .also { 55 | it.addListener(object : AnimatorListenerAdapter() { 56 | override fun onAnimationEnd(animation: Animator?) { 57 | holder.icExpand.rotation = postInfo.arrowRotation 58 | dispatchAnimationFinished(holder) 59 | } 60 | }) 61 | it.start() 62 | } 63 | } 64 | return super.animateChange(oldHolder, holder, preInfo, postInfo) 65 | } 66 | 67 | //It means that for animation we don’t need to have separated objects of ViewHolder (old and new holder) 68 | override fun canReuseUpdatedViewHolder(viewHolder: RecyclerView.ViewHolder): Boolean { 69 | return true 70 | } 71 | } 72 | 73 | class HeaderItemInfo : RecyclerView.ItemAnimator.ItemHolderInfo() { 74 | 75 | internal var arrowRotation: Float = 0F 76 | 77 | override fun setFrom(holder: RecyclerView.ViewHolder): RecyclerView.ItemAnimator.ItemHolderInfo { 78 | if (holder is ItemsExpandableAdapter.ViewHolder.HeaderVH) { 79 | arrowRotation = holder.icExpand.rotation 80 | } 81 | return super.setFrom(holder) 82 | } 83 | } -------------------------------------------------------------------------------- /app/src/main/java/dev/ohoussein/mergeadaptertutorial/ItemsExpandableAdapter.kt: -------------------------------------------------------------------------------- 1 | package dev.ohoussein.mergeadaptertutorial 2 | 3 | import android.view.LayoutInflater 4 | import android.view.View 5 | import android.view.ViewGroup 6 | import androidx.recyclerview.widget.RecyclerView 7 | import dev.ohoussein.mergeadaptertutorial.data.ItemsGroup 8 | import kotlinx.android.synthetic.main.item_content.view.* 9 | import kotlinx.android.synthetic.main.item_header.view.* 10 | import kotlin.properties.Delegates 11 | import kotlin.reflect.KProperty 12 | 13 | class ItemsExpandableAdapter(private val itemsGroup: ItemsGroup) : 14 | RecyclerView.Adapter() { 15 | 16 | companion object { 17 | private const val VIEW_TYPE_ITEM = 1 18 | private const val VIEW_TYPE_HEADER = 2 19 | 20 | private const val IC_EXPANDED_ROTATION_DEG = 0F 21 | private const val IC_COLLAPSED_ROTATION_DEG = 180F 22 | } 23 | 24 | var isExpanded: Boolean by Delegates.observable(true) { _: KProperty<*>, _: Boolean, newExpandedValue: Boolean -> 25 | if (newExpandedValue) { 26 | notifyItemRangeInserted(1, itemsGroup.items.size) 27 | //To update the header expand icon 28 | notifyItemChanged(0) 29 | } else { 30 | notifyItemRangeRemoved(1, itemsGroup.items.size) 31 | //To update the header expand icon 32 | notifyItemChanged(0) 33 | } 34 | } 35 | 36 | private val onHeaderClickListener = View.OnClickListener { 37 | isExpanded = !isExpanded 38 | } 39 | 40 | override fun getItemViewType(position: Int): Int { 41 | return if (position == 0) VIEW_TYPE_HEADER else VIEW_TYPE_ITEM 42 | } 43 | 44 | override fun getItemCount(): Int = if (isExpanded) itemsGroup.items.size + 1 else 1 45 | 46 | 47 | override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder { 48 | val inflater = LayoutInflater.from(parent.context) 49 | return when (viewType) { 50 | VIEW_TYPE_HEADER -> ViewHolder.HeaderVH( 51 | inflater.inflate( 52 | R.layout.item_header, 53 | parent, 54 | false 55 | ) 56 | ) 57 | else -> ViewHolder.ItemVH( 58 | inflater.inflate( 59 | R.layout.item_content, 60 | parent, 61 | false 62 | ) 63 | ) 64 | } 65 | } 66 | 67 | override fun onBindViewHolder(holder: ViewHolder, position: Int) { 68 | when (holder) { 69 | is ViewHolder.ItemVH -> holder.bind(itemsGroup.items[position - 1]) 70 | is ViewHolder.HeaderVH -> { 71 | holder.bind(itemsGroup.title, isExpanded, onHeaderClickListener) 72 | } 73 | } 74 | } 75 | 76 | sealed class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { 77 | 78 | class ItemVH(itemView: View) : ViewHolder(itemView) { 79 | 80 | fun bind(content: String) { 81 | itemView.apply { 82 | itemView.tvItemContent.text = content 83 | } 84 | } 85 | } 86 | 87 | class HeaderVH(itemView: View) : ViewHolder(itemView) { 88 | internal val tvTitle = itemView.tvTitle 89 | internal val icExpand = itemView.icExpand 90 | 91 | fun bind(content: String, expanded: Boolean, onClickListener: View.OnClickListener) { 92 | tvTitle.text = content 93 | icExpand.rotation = 94 | if (expanded) IC_EXPANDED_ROTATION_DEG else IC_COLLAPSED_ROTATION_DEG 95 | itemView.setOnClickListener(onClickListener) 96 | } 97 | } 98 | } 99 | } 100 | 101 | 102 | -------------------------------------------------------------------------------- /.idea/codeStyles/Project.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 20 | 22 | 23 | 24 | 26 | 27 | 28 |
29 | 30 | 31 | 32 | xmlns:android 33 | 34 | ^$ 35 | 36 | 37 | 38 |
39 |
40 | 41 | 42 | 43 | xmlns:.* 44 | 45 | ^$ 46 | 47 | 48 | BY_NAME 49 | 50 |
51 |
52 | 53 | 54 | 55 | .*:id 56 | 57 | http://schemas.android.com/apk/res/android 58 | 59 | 60 | 61 |
62 |
63 | 64 | 65 | 66 | .*:name 67 | 68 | http://schemas.android.com/apk/res/android 69 | 70 | 71 | 72 |
73 |
74 | 75 | 76 | 77 | name 78 | 79 | ^$ 80 | 81 | 82 | 83 |
84 |
85 | 86 | 87 | 88 | style 89 | 90 | ^$ 91 | 92 | 93 | 94 |
95 |
96 | 97 | 98 | 99 | .* 100 | 101 | ^$ 102 | 103 | 104 | BY_NAME 105 | 106 |
107 |
108 | 109 | 110 | 111 | .* 112 | 113 | http://schemas.android.com/apk/res/android 114 | 115 | 116 | ANDROID_ATTRIBUTE_ORDER 117 | 118 |
119 |
120 | 121 | 122 | 123 | .* 124 | 125 | .* 126 | 127 | 128 | BY_NAME 129 | 130 |
131 | 132 | 133 | 134 | 135 | 137 | 138 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 | 140 | 145 | 150 | 155 | 160 | 165 | 170 | 171 | --------------------------------------------------------------------------------