├── app ├── .gitignore ├── src │ ├── main │ │ ├── res │ │ │ ├── values │ │ │ │ ├── strings.xml │ │ │ │ ├── colors.xml │ │ │ │ └── styles.xml │ │ │ ├── drawable │ │ │ │ ├── image_five.jpg │ │ │ │ ├── image_four.jpg │ │ │ │ ├── image_one.jpg │ │ │ │ ├── image_two.jpg │ │ │ │ ├── image_three.jpg │ │ │ │ ├── text_background.xml │ │ │ │ ├── reference_background.xml │ │ │ │ └── shadow_inverse.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 │ │ │ └── layout │ │ │ │ ├── layout_dummy_item.xml │ │ │ │ ├── reference_layout.xml │ │ │ │ ├── activity_main.xml │ │ │ │ └── layout_featured_item.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ │ └── shivam │ │ │ └── developer │ │ │ └── focusrecyclerview │ │ │ ├── MainActivity.java │ │ │ └── CustomRecyclerViewAdapter.java │ ├── test │ │ └── java │ │ │ └── shivam │ │ │ └── developer │ │ │ └── focusrecyclerview │ │ │ └── ExampleUnitTest.java │ └── androidTest │ │ └── java │ │ └── shivam │ │ └── developer │ │ └── focusrecyclerview │ │ └── ExampleInstrumentedTest.java ├── proguard-rules.pro └── build.gradle ├── featuredrecyclerview ├── .gitignore ├── src │ └── main │ │ ├── res │ │ └── values │ │ │ ├── strings.xml │ │ │ ├── dimens.xml │ │ │ └── attrs.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ └── shivam │ │ └── developer │ │ └── featuredrecyclerview │ │ ├── FeatureLinearLayoutManager.java │ │ ├── FeatureRecyclerViewAdapter.java │ │ └── FeaturedRecyclerView.java ├── build.gradle └── proguard-rules.pro ├── settings.gradle ├── art ├── fb.png ├── concept.gif ├── gplus.png ├── mockup.png ├── linkedin.png ├── sample_GIF.gif └── diagram_small.jpg ├── .idea ├── copyright │ └── profiles_settings.xml ├── runConfigurations.xml ├── modules.xml ├── gradle.xml ├── compiler.xml └── misc.xml ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .gitignore ├── gradle.properties ├── gradlew.bat ├── gradlew ├── README.md └── LICENSE /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /featuredrecyclerview/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app', ':featuredrecyclerview' 2 | -------------------------------------------------------------------------------- /art/fb.png: 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-------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | FeaturedRecyclerView 3 | 4 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | FeaturedRecyclerView 3 | 4 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/image_five.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/drawable/image_five.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable/image_four.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/drawable/image_four.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable/image_one.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/drawable/image_one.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable/image_two.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/drawable/image_two.jpg -------------------------------------------------------------------------------- /app/src/main/res/drawable/image_three.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/drawable/image_three.jpg -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/developer-shivam/FeaturedRecyclerView/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/developer-shivam/FeaturedRecyclerView/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/developer-shivam/FeaturedRecyclerView/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/developer-shivam/FeaturedRecyclerView/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/workspace.xml 5 | /.idea/libraries 6 | /.idea/ 7 | .DS_Store 8 | /build 9 | /captures 10 | .externalNativeBuild 11 | -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/res/values/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 100dp 4 | 200dp 5 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #3F51B5 4 | #303F9F 5 | #FF4081 6 | 7 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/text_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 7 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Fri Jun 09 11:47:54 IST 2017 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-3.3-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/reference_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 7 | -------------------------------------------------------------------------------- /app/src/main/res/layout/layout_dummy_item.xml: -------------------------------------------------------------------------------- 1 | 2 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/shadow_inverse.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 9 | -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 4 | 5 | 7 | 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/res/layout/reference_layout.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 10 | 11 | -------------------------------------------------------------------------------- /app/src/test/java/shivam/developer/focusrecyclerview/ExampleUnitTest.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.focusrecyclerview; 2 | 3 | import org.junit.Test; 4 | 5 | import static org.junit.Assert.*; 6 | 7 | /** 8 | * Example local unit test, which will execute on the development machine (host). 9 | * 10 | * @see Testing documentation 11 | */ 12 | public class ExampleUnitTest { 13 | @Test 14 | public void addition_isCorrect() throws Exception { 15 | assertEquals(4, 2 + 2); 16 | } 17 | } -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/res/values/attrs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 13 | 14 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/java/shivam/developer/featuredrecyclerview/FeatureLinearLayoutManager.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.featuredrecyclerview; 2 | 3 | import android.content.Context; 4 | import android.support.v7.widget.RecyclerView; 5 | 6 | public class FeatureLinearLayoutManager extends android.support.v7.widget.LinearLayoutManager{ 7 | 8 | public FeatureLinearLayoutManager(Context context) { 9 | super(context); 10 | } 11 | 12 | public FeatureLinearLayoutManager(Context context, int orientation, boolean reverseLayout) { 13 | super(context, orientation, reverseLayout); 14 | } 15 | 16 | @Override 17 | protected int getExtraLayoutSpace(RecyclerView.State state) { 18 | return 1000; 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 18 | 19 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | 3 | # IDE (e.g. Android Studio) users: 4 | # Gradle settings configured through the IDE *will override* 5 | # any settings specified in this file. 6 | 7 | # For more details on how to configure your build environment visit 8 | # http://www.gradle.org/docs/current/userguide/build_environment.html 9 | 10 | # Specifies the JVM arguments used for the daemon process. 11 | # The setting is particularly useful for tweaking memory settings. 12 | org.gradle.jvmargs=-Xmx1536m 13 | 14 | # When configured, Gradle will run in incubating parallel mode. 15 | # This option should only be used with decoupled projects. More details, visit 16 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 17 | # org.gradle.parallel=true 18 | -------------------------------------------------------------------------------- /featuredrecyclerview/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.library' 2 | 3 | apply plugin: 'com.github.dcendents.android-maven' 4 | 5 | group='com.github.developer-shivam' 6 | 7 | android { 8 | compileSdkVersion 25 9 | buildToolsVersion "25.0.2" 10 | 11 | defaultConfig { 12 | minSdkVersion 11 13 | targetSdkVersion 25 14 | versionCode 1 15 | versionName "1.0" 16 | 17 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 18 | 19 | } 20 | buildTypes { 21 | release { 22 | minifyEnabled false 23 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 24 | } 25 | } 26 | } 27 | 28 | dependencies { 29 | compile fileTree(dir: 'libs', include: ['*.jar']) 30 | compile 'com.android.support:recyclerview-v7:25.3.1' 31 | } 32 | -------------------------------------------------------------------------------- /app/src/androidTest/java/shivam/developer/focusrecyclerview/ExampleInstrumentedTest.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.focusrecyclerview; 2 | 3 | import android.content.Context; 4 | import android.support.test.InstrumentationRegistry; 5 | import android.support.test.runner.AndroidJUnit4; 6 | 7 | import org.junit.Test; 8 | import org.junit.runner.RunWith; 9 | 10 | import static org.junit.Assert.*; 11 | 12 | /** 13 | * Instrumentation test, which will execute on an Android device. 14 | * 15 | * @see Testing documentation 16 | */ 17 | @RunWith(AndroidJUnit4.class) 18 | public class ExampleInstrumentedTest { 19 | @Test 20 | public void useAppContext() throws Exception { 21 | // Context of the app under test. 22 | Context appContext = InstrumentationRegistry.getTargetContext(); 23 | 24 | assertEquals("shivam.developer.focusrecyclerview", appContext.getPackageName()); 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 7 | 8 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /home/shivam/Android/Sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | 19 | # Uncomment this to preserve the line number information for 20 | # debugging stack traces. 21 | #-keepattributes SourceFile,LineNumberTable 22 | 23 | # If you keep the line number information, uncomment this to 24 | # hide the original source file name. 25 | #-renamesourcefileattribute SourceFile 26 | -------------------------------------------------------------------------------- /featuredrecyclerview/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /home/shivam/Android/Sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | 19 | # Uncomment this to preserve the line number information for 20 | # debugging stack traces. 21 | #-keepattributes SourceFile,LineNumberTable 22 | 23 | # If you keep the line number information, uncomment this to 24 | # hide the original source file name. 25 | #-renamesourcefileattribute SourceFile 26 | -------------------------------------------------------------------------------- /app/src/main/res/layout/layout_featured_item.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 12 | 13 | 17 | 18 | 30 | -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/java/shivam/developer/featuredrecyclerview/FeatureRecyclerViewAdapter.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.featuredrecyclerview; 2 | 3 | import android.support.v7.widget.RecyclerView; 4 | import android.view.ViewGroup; 5 | 6 | public abstract class FeatureRecyclerViewAdapter extends RecyclerView.Adapter { 7 | 8 | public abstract T onCreateFeaturedViewHolder(ViewGroup parent, int viewType); 9 | 10 | public abstract void onBindFeaturedViewHolder(T holder, int position); 11 | 12 | public abstract int getFeaturedItemsCount(); 13 | 14 | public abstract void onSmallItemResize(T holder, int position, float offset); 15 | 16 | public abstract void onBigItemResize(T holder, int position, float offset); 17 | 18 | @Override 19 | public T onCreateViewHolder(ViewGroup parent, int viewType) { 20 | return onCreateFeaturedViewHolder(parent, viewType); 21 | } 22 | 23 | @Override 24 | public void onBindViewHolder(T holder, int position) { 25 | onBindFeaturedViewHolder(holder, position); 26 | } 27 | 28 | @Override 29 | public int getItemCount() { 30 | return getFeaturedItemsCount(); 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 25 5 | buildToolsVersion "25.0.2" 6 | defaultConfig { 7 | applicationId "shivam.developer.focusrecyclerview" 8 | minSdkVersion 16 9 | targetSdkVersion 25 10 | versionCode 1 11 | versionName "1.0" 12 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 13 | } 14 | buildTypes { 15 | release { 16 | minifyEnabled false 17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 18 | } 19 | } 20 | } 21 | 22 | dependencies { 23 | compile fileTree(include: ['*.jar'], dir: 'libs') 24 | androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 25 | exclude group: 'com.android.support', module: 'support-annotations' 26 | }) 27 | compile 'com.android.support:appcompat-v7:25.3.1' 28 | compile 'com.android.support:recyclerview-v7:25.3.1' 29 | compile 'com.android.support:cardview-v7:25.3.1' 30 | 31 | compile 'com.squareup.picasso:picasso:2.5.2' 32 | 33 | compile 'com.android.support.constraint:constraint-layout:1.0.2' 34 | testCompile 'junit:junit:4.12' 35 | compile project(':featuredrecyclerview') 36 | } 37 | -------------------------------------------------------------------------------- /app/src/main/java/shivam/developer/focusrecyclerview/MainActivity.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.focusrecyclerview; 2 | 3 | import android.support.v7.app.AppCompatActivity; 4 | import android.os.Bundle; 5 | import android.support.v7.widget.LinearLayoutManager; 6 | import android.support.v7.widget.RecyclerView; 7 | 8 | import java.util.ArrayList; 9 | import java.util.List; 10 | 11 | import shivam.developer.featuredrecyclerview.FeatureLinearLayoutManager; 12 | import shivam.developer.featuredrecyclerview.FeaturedRecyclerView; 13 | 14 | public class MainActivity extends AppCompatActivity { 15 | 16 | List dummyData = new ArrayList<>(); 17 | FeaturedRecyclerView featuredRecyclerView; 18 | 19 | @Override 20 | protected void onCreate(Bundle savedInstanceState) { 21 | super.onCreate(savedInstanceState); 22 | setContentView(R.layout.activity_main); 23 | 24 | createDummyDataList(); 25 | 26 | featuredRecyclerView = (FeaturedRecyclerView) findViewById(R.id.featured_recycler_view); 27 | 28 | FeatureLinearLayoutManager layoutManager = new FeatureLinearLayoutManager(this); 29 | featuredRecyclerView.setLayoutManager(layoutManager); 30 | 31 | CustomRecyclerViewAdapter adapter = new CustomRecyclerViewAdapter(); 32 | adapter.swapData(dummyData); 33 | 34 | featuredRecyclerView.setAdapter(adapter); 35 | } 36 | 37 | private void createDummyDataList() { 38 | for (int i = 1; i <= 20; i++) { 39 | dummyData.add("Item " + i); 40 | } 41 | } 42 | } 43 | -------------------------------------------------------------------------------- /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 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 12 | set DEFAULT_JVM_OPTS= 13 | 14 | set DIRNAME=%~dp0 15 | if "%DIRNAME%" == "" set DIRNAME=. 16 | set APP_BASE_NAME=%~n0 17 | set APP_HOME=%DIRNAME% 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 Windowz variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | if "%@eval[2+2]" == "4" goto 4NT_args 53 | 54 | :win9xME_args 55 | @rem Slurp the command line arguments. 56 | set CMD_LINE_ARGS= 57 | set _SKIP=2 58 | 59 | :win9xME_args_slurp 60 | if "x%~1" == "x" goto execute 61 | 62 | set CMD_LINE_ARGS=%* 63 | goto execute 64 | 65 | :4NT_args 66 | @rem Get arguments from the 4NT Shell from JP Software 67 | set CMD_LINE_ARGS=%$ 68 | 69 | :execute 70 | @rem Setup the command line 71 | 72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 73 | 74 | @rem Execute Gradle 75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 76 | 77 | :end 78 | @rem End local scope for the variables with windows NT shell 79 | if "%ERRORLEVEL%"=="0" goto mainEnd 80 | 81 | :fail 82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 83 | rem the _cmd.exe /c_ return code! 84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 85 | exit /b 1 86 | 87 | :mainEnd 88 | if "%OS%"=="Windows_NT" endlocal 89 | 90 | :omega 91 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 19 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 46 | 47 | 48 | 49 | 50 | 1.8 51 | 52 | 57 | 58 | 59 | 60 | 61 | 62 | -------------------------------------------------------------------------------- /app/src/main/java/shivam/developer/focusrecyclerview/CustomRecyclerViewAdapter.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.focusrecyclerview; 2 | 3 | import android.support.v7.widget.RecyclerView; 4 | import android.view.LayoutInflater; 5 | import android.view.View; 6 | import android.view.ViewGroup; 7 | import android.widget.ImageView; 8 | import android.widget.TextView; 9 | 10 | import com.squareup.picasso.Picasso; 11 | 12 | import java.util.List; 13 | 14 | import shivam.developer.featuredrecyclerview.FeatureRecyclerViewAdapter; 15 | 16 | public class CustomRecyclerViewAdapter extends FeatureRecyclerViewAdapter { 17 | 18 | private static final int ITEM_TYPE_FEATURED = 0; 19 | private static final int ITEM_TYPE_DUMMY = 1; 20 | 21 | private List data; 22 | private int[] images = new int[5]; 23 | 24 | CustomRecyclerViewAdapter() { 25 | images[0] = R.drawable.image_one; 26 | images[1] = R.drawable.image_three; 27 | images[2] = R.drawable.image_two; 28 | images[3] = R.drawable.image_four; 29 | images[4] = R.drawable.image_five; 30 | } 31 | 32 | public void swapData(List data) { 33 | this.data = data; 34 | notifyDataSetChanged(); 35 | } 36 | 37 | @Override 38 | public RecyclerView.ViewHolder onCreateFeaturedViewHolder(ViewGroup parent, int viewType) { 39 | switch (viewType) { 40 | case ITEM_TYPE_FEATURED: 41 | return new FeaturedViewHolder( 42 | LayoutInflater.from(parent.getContext()) 43 | .inflate(R.layout.layout_featured_item, parent, false)); 44 | case ITEM_TYPE_DUMMY: 45 | default: 46 | return new DummyViewHolder( 47 | LayoutInflater.from(parent.getContext()) 48 | .inflate(R.layout.layout_dummy_item, parent, false)); 49 | } 50 | } 51 | 52 | @Override 53 | public void onBindFeaturedViewHolder(RecyclerView.ViewHolder holder, int position) { 54 | if (holder instanceof FeaturedViewHolder) { 55 | FeaturedViewHolder featuredViewHolder = (FeaturedViewHolder) holder; 56 | Picasso.with(holder.itemView.getContext()).load(images[position % 4]).into(featuredViewHolder.ivBackground); 57 | featuredViewHolder.tvHeading.setText(data.get(position)); 58 | } else if (holder instanceof DummyViewHolder) { 59 | //Do nothing 60 | } 61 | } 62 | 63 | @Override 64 | public int getFeaturedItemsCount() { 65 | return data.size() + 2; /* Return 2 extra dummy items */ 66 | } 67 | 68 | @Override 69 | public int getItemViewType(int position) { 70 | return position >= 0 && position < data.size() ? ITEM_TYPE_FEATURED : ITEM_TYPE_DUMMY; 71 | } 72 | 73 | @Override 74 | public void onSmallItemResize(RecyclerView.ViewHolder holder, int position, float offset) { 75 | if (holder instanceof FeaturedViewHolder) { 76 | FeaturedViewHolder featuredViewHolder = (FeaturedViewHolder) holder; 77 | featuredViewHolder.tvHeading.setAlpha(offset / 100f); 78 | } 79 | } 80 | 81 | @Override 82 | public void onBigItemResize(RecyclerView.ViewHolder holder, int position, float offset) { 83 | if (holder instanceof FeaturedViewHolder) { 84 | FeaturedViewHolder featuredViewHolder = (FeaturedViewHolder) holder; 85 | featuredViewHolder.tvHeading.setAlpha(offset / 100f); 86 | } 87 | } 88 | 89 | 90 | static class FeaturedViewHolder extends RecyclerView.ViewHolder { 91 | 92 | ImageView ivBackground; 93 | TextView tvHeading; 94 | 95 | FeaturedViewHolder(View itemView) { 96 | super(itemView); 97 | 98 | ivBackground = (ImageView) itemView.findViewById(R.id.iv_background); 99 | tvHeading = (TextView) itemView.findViewById(R.id.tv_heading); 100 | } 101 | } 102 | 103 | static class DummyViewHolder extends RecyclerView.ViewHolder { 104 | 105 | DummyViewHolder(View itemView) { 106 | super(itemView); 107 | } 108 | } 109 | } 110 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 10 | DEFAULT_JVM_OPTS="" 11 | 12 | APP_NAME="Gradle" 13 | APP_BASE_NAME=`basename "$0"` 14 | 15 | # Use the maximum available, or set MAX_FD != -1 to use that value. 16 | MAX_FD="maximum" 17 | 18 | warn ( ) { 19 | echo "$*" 20 | } 21 | 22 | die ( ) { 23 | echo 24 | echo "$*" 25 | echo 26 | exit 1 27 | } 28 | 29 | # OS specific support (must be 'true' or 'false'). 30 | cygwin=false 31 | msys=false 32 | darwin=false 33 | case "`uname`" in 34 | CYGWIN* ) 35 | cygwin=true 36 | ;; 37 | Darwin* ) 38 | darwin=true 39 | ;; 40 | MINGW* ) 41 | msys=true 42 | ;; 43 | esac 44 | 45 | # Attempt to set APP_HOME 46 | # Resolve links: $0 may be a link 47 | PRG="$0" 48 | # Need this for relative symlinks. 49 | while [ -h "$PRG" ] ; do 50 | ls=`ls -ld "$PRG"` 51 | link=`expr "$ls" : '.*-> \(.*\)$'` 52 | if expr "$link" : '/.*' > /dev/null; then 53 | PRG="$link" 54 | else 55 | PRG=`dirname "$PRG"`"/$link" 56 | fi 57 | done 58 | SAVED="`pwd`" 59 | cd "`dirname \"$PRG\"`/" >/dev/null 60 | APP_HOME="`pwd -P`" 61 | cd "$SAVED" >/dev/null 62 | 63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 64 | 65 | # Determine the Java command to use to start the JVM. 66 | if [ -n "$JAVA_HOME" ] ; then 67 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 68 | # IBM's JDK on AIX uses strange locations for the executables 69 | JAVACMD="$JAVA_HOME/jre/sh/java" 70 | else 71 | JAVACMD="$JAVA_HOME/bin/java" 72 | fi 73 | if [ ! -x "$JAVACMD" ] ; then 74 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 75 | 76 | Please set the JAVA_HOME variable in your environment to match the 77 | location of your Java installation." 78 | fi 79 | else 80 | JAVACMD="java" 81 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 82 | 83 | Please set the JAVA_HOME variable in your environment to match the 84 | location of your Java installation." 85 | fi 86 | 87 | # Increase the maximum file descriptors if we can. 88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then 89 | MAX_FD_LIMIT=`ulimit -H -n` 90 | if [ $? -eq 0 ] ; then 91 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 92 | MAX_FD="$MAX_FD_LIMIT" 93 | fi 94 | ulimit -n $MAX_FD 95 | if [ $? -ne 0 ] ; then 96 | warn "Could not set maximum file descriptor limit: $MAX_FD" 97 | fi 98 | else 99 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 100 | fi 101 | fi 102 | 103 | # For Darwin, add options to specify how the application appears in the dock 104 | if $darwin; then 105 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 106 | fi 107 | 108 | # For Cygwin, switch paths to Windows format before running java 109 | if $cygwin ; then 110 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 111 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 112 | JAVACMD=`cygpath --unix "$JAVACMD"` 113 | 114 | # We build the pattern for arguments to be converted via cygpath 115 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 116 | SEP="" 117 | for dir in $ROOTDIRSRAW ; do 118 | ROOTDIRS="$ROOTDIRS$SEP$dir" 119 | SEP="|" 120 | done 121 | OURCYGPATTERN="(^($ROOTDIRS))" 122 | # Add a user-defined pattern to the cygpath arguments 123 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 124 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 125 | fi 126 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 127 | i=0 128 | for arg in "$@" ; do 129 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 130 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 131 | 132 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 133 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 134 | else 135 | eval `echo args$i`="\"$arg\"" 136 | fi 137 | i=$((i+1)) 138 | done 139 | case $i in 140 | (0) set -- ;; 141 | (1) set -- "$args0" ;; 142 | (2) set -- "$args0" "$args1" ;; 143 | (3) set -- "$args0" "$args1" "$args2" ;; 144 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 145 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 146 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 147 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 148 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 149 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 150 | esac 151 | fi 152 | 153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules 154 | function splitJvmOpts() { 155 | JVM_OPTS=("$@") 156 | } 157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS 158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" 159 | 160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" 161 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | FeaturedRecyclerView 2 | ------------------------------ 3 | **FeaturedRecyclerView** is a custom **ViewGroup** which is made by extending **ReyclerView**. As name suggest **FeaturedRecyclerView**, it features the first item which is at top (by setting its height to **featuredItemHeight**). 4 | 5 | [![API](https://img.shields.io/badge/API-11%2B-red.svg)](https://android-arsenal.com/api?level=11) [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-FeaturedRecyclerView-yellowgreen.svg?style=flat)](https://android-arsenal.com/details/1/5892) 6 | 7 | I have written article on this library (How's it working) 8 | https://blog.mindorks.com/hack-that-recyclerview-f6b8238e68ec 9 | 10 | ![SampleGIF](/art/mockup.png) 11 | 12 | Attributes 13 | ---------- 14 | 15 | * **featuredItemHeight**: Height of first item. 16 | * **defaultItemHeight** : Height of other items. 17 | * **offset** : It is not a xml attribute but a parameter which is received in **FeaturedRecyclerViewAdapter**'s method to animate the property of childs widget. 18 | 19 | ![SampleGIF](/art/sample_GIF.gif) 20 | 21 | Diagramatic View 22 | ----------------------- 23 | ![SampleDiagram](/art/diagram_small.jpg) 24 | 25 | Concept 26 | ---------- 27 | ![Concept](/art/concept.gif) 28 | 29 | FutureWork 30 | --------------- 31 | * **Horizontal Orientation** support would be added. 32 | * **Reference Points** would be changed. 33 | 34 | Basic Usage 35 | ----------- 36 | 37 | Add below lines in build.gradle at app level. 38 | ```java 39 | compile 'com.github.developer-shivam:FeaturedRecyclerView:1.0.0' 40 | ``` 41 | 42 | *For a working implementation, see `/app` folder* 43 | 44 | ```java 45 | FeaturedRecyclerView featuredRecyclerView = (FeaturedRecyclerView) findViewById(R.id.featured_recycler_view); 46 | FeatureLinearLayoutManager layoutManager = new FeatureLinearLayoutManager(this); 47 | featuredRecyclerView.setLayoutManager(layoutManager); 48 | CustomRecyclerViewAdapter adapter = new CustomRecyclerViewAdapter(this, dummyData);featuredRecyclerView.setAdapter(adapter); 49 | ``` 50 | 51 | You must use **FeaturedLinearLayoutManager** to avoid flickering. 52 | 53 | ```xml 54 | 59 | ``` 60 | 61 | Adavantages of using **FeaturedRecyclerViewAdapter** is that it contains two more methods which can be used to animate the properties of childs attribute (like textView fading). 62 | 63 | ```java 64 | @Override 65 | public void onSmallItemResize(CustomRecyclerViewHolder holder, int position, float offset) { 66 | holder.tvHeading.setAlpha(offset / 100f); 67 | } 68 | 69 | @Override 70 | public void onBigItemResize(CustomRecyclerViewHolder holder, int position, float offset) { 71 | holder.tvHeading.setAlpha(offset / 100f); 72 | } 73 | ``` 74 | Donations 75 | ------------- 76 | 77 | This project needs you! If you would like to support this project's further development, the creator of this project or the continuous maintenance of this project, feel free to donate. Your donation is highly appreciated (and I love food, coffee and beer). Thank you! 78 | 79 | **PayPal** 80 | 81 | * **[Donate $5]**: Thank's for creating this project, here's a coffee (or some beer) for you! 82 | * **[Donate $10]**: Wow, I am stunned. Let me take you to the movies! 83 | * **[Donate $15]**: I really appreciate your work, let's grab some lunch! 84 | * **[Donate $25]**: That's some awesome stuff you did right there, dinner is on me! 85 | * **[Donate $50]**: I really really want to support this project, great job! 86 | * **[Donate $100]**: You are the man! This project saved me hours (if not days) of struggle and hard work, simply awesome! 87 | * **[Donate $2799]**: Go buddy, buy Macbook Pro for yourself! 88 | Of course, you can also choose what you want to donate, all donations are awesome! 89 | 90 | Connect With Me 91 | ----------- 92 | 93 | Shivam Satija (droidsergeant) 94 | I love making new friends, please feel free to connect with me. 95 | 96 | 97 | Connect me on Google+ 98 | 99 | 100 | Connect me on Facebook 101 | 102 | 103 | Connect me on LinkedIn 104 | 105 | 106 | Question / Contact Me / Hire Me 107 | --------------------- 108 | Please feel free to ping me at **dr.droid27@gmail.com**. Expected package would be **6 lpa**. 109 | 110 | License 111 | ------- 112 | 113 | ``` 114 | Copyright 2017 Shivam Satija 115 | 116 | Licensed under the Apache License, Version 2.0 (the "License"); 117 | you may not use this file except in compliance with the License. 118 | You may obtain a copy of the License at 119 | 120 | http://www.apache.org/licenses/LICENSE-2.0 121 | 122 | Unless required by applicable law or agreed to in writing, software 123 | distributed under the License is distributed on an "AS IS" BASIS, 124 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 125 | See the License for the specific language governing permissions and 126 | limitations under the License. 127 | ``` 128 | 129 | [Facebook]: /art/fb.png 130 | [Google+]: /art/gplus.png 131 | [LinkedIn]: /art/linkedin.png 132 | 133 | [Donate $5]: https://www.paypal.me/developerShivam/5 134 | [Donate $10]: https://www.paypal.me/developerShivam/10 135 | [Donate $15]: https://www.paypal.me/developerShivam/15 136 | [Donate $25]: https://www.paypal.me/developerShivam/25 137 | [Donate $50]: https://www.paypal.me/developerShivam/50 138 | [Donate $100]: https://www.paypal.me/developerShivam/100 139 | [Donate $2799]: https://www.paypal.me/developerShivam/2799 -------------------------------------------------------------------------------- /featuredrecyclerview/src/main/java/shivam/developer/featuredrecyclerview/FeaturedRecyclerView.java: -------------------------------------------------------------------------------- 1 | package shivam.developer.featuredrecyclerview; 2 | 3 | import android.content.Context; 4 | import android.content.res.TypedArray; 5 | import android.support.annotation.Nullable; 6 | import android.support.v7.widget.LinearLayoutManager; 7 | import android.support.v7.widget.RecyclerView; 8 | import android.util.AttributeSet; 9 | import android.view.View; 10 | import android.widget.Adapter; 11 | 12 | public class FeaturedRecyclerView extends RecyclerView { 13 | 14 | private int defaultItemHeight; 15 | private int featuredItemHeight; 16 | private int maxDistance; 17 | private int diffHeight; 18 | 19 | private int totalItemsInView = 0; 20 | private int itemToResize; 21 | 22 | private FeatureRecyclerViewAdapter adapter; 23 | 24 | public FeaturedRecyclerView(Context context) { 25 | super(context); 26 | init(context, null); 27 | } 28 | 29 | public FeaturedRecyclerView(Context context, @Nullable AttributeSet attrs) { 30 | super(context, attrs); 31 | init(context, attrs); 32 | } 33 | 34 | private void init(Context context, AttributeSet attrs) { 35 | TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.FeaturedRecyclerView); 36 | initAttributes(array); 37 | array.recycle(); 38 | 39 | addOnScrollListener(new OnScrollListener() { 40 | 41 | @Override 42 | public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 43 | super.onScrolled(recyclerView, dx, dy); 44 | 45 | if (getLayoutManager() instanceof LinearLayoutManager) { 46 | LinearLayoutManager layoutManager = (LinearLayoutManager) getLayoutManager(); 47 | if (layoutManager.getOrientation() == LinearLayoutManager.VERTICAL) { 48 | totalItemsInView = layoutManager.getItemCount(); 49 | itemToResize = dy > 0 ? 1 : 0; 50 | changeHeightAccordingToScroll(recyclerView); 51 | } 52 | } 53 | } 54 | 55 | @Override 56 | public void onScrollStateChanged(RecyclerView recyclerView, int newState) { 57 | super.onScrollStateChanged(recyclerView, newState); 58 | } 59 | }); 60 | } 61 | 62 | private void initAttributes(TypedArray array) { 63 | 64 | defaultItemHeight = (int) array.getDimension(R.styleable.FeaturedRecyclerView_defaultItemHeight, 65 | getResources().getDimension(R.dimen.defaultItemHeight)); 66 | featuredItemHeight = (int) array.getDimension(R.styleable.FeaturedRecyclerView_featuredItemHeight, 67 | getResources().getDimension(R.dimen.featuredItemHeight)); 68 | 69 | diffHeight = featuredItemHeight - defaultItemHeight; 70 | 71 | maxDistance = featuredItemHeight; 72 | } 73 | 74 | /** 75 | * If the distance of view is 0 then its height would be equal to featuredItemHeight 76 | * else height according to distance. 77 | * In every case maxDistance = (featuredItemHeight + defaultItemHeight) / 2 78 | * 79 | * @param distance is distance between 0 Y-Coordinate and view.getTop() 80 | * @return height = = featuredItemHeight - ((distance * (featuredItemHeight - defaultItemHeight) / maxDistance) 81 | */ 82 | private float height(float distance) { 83 | return featuredItemHeight - ((distance * (diffHeight)) / maxDistance); 84 | } 85 | 86 | /** 87 | * This method will invoked every time onScroll is invoked. 88 | * 89 | * @param recyclerView is the recyclerview on whom scrolling is performed. 90 | */ 91 | private void changeHeightAccordingToScroll(RecyclerView recyclerView) { 92 | for (int i = 0; i < totalItemsInView; i++) { 93 | View viewToBeResized = recyclerView.getChildAt(i); 94 | if (viewToBeResized != null) { 95 | float distance = getTopOfView(viewToBeResized); 96 | if (distance > maxDistance) { 97 | viewToBeResized.getLayoutParams().height = defaultItemHeight; 98 | viewToBeResized.requestLayout(); 99 | } else if (distance <= maxDistance) { 100 | viewToBeResized.getLayoutParams().height = (int) height(distance); 101 | viewToBeResized.requestLayout(); 102 | } 103 | if (i == itemToResize) { 104 | onItemBigResize(viewToBeResized, recyclerView); 105 | } else { 106 | onItemSmallResize(viewToBeResized, recyclerView); 107 | } 108 | } 109 | 110 | } 111 | } 112 | 113 | /** 114 | * Ranges from 0 to 100. If height is featuredItemHeight then offset would be 115 | * 100 and if height is defaultItemHeight then it will be equal to 0. 116 | * 117 | * @param height will be the height of view 118 | * @return the offset according to which view's child's property can be 119 | * changed. 120 | */ 121 | private float getOffsetAccordingToHeight(int height) { 122 | return ((height - defaultItemHeight) * 100) / diffHeight; 123 | } 124 | 125 | private void onItemSmallResize(View view, RecyclerView recyclerView) { 126 | if (adapter != null) { 127 | adapter.onSmallItemResize(recyclerView.getChildViewHolder(view), itemToResize, getOffsetAccordingToHeight(view.getHeight())); 128 | } 129 | } 130 | 131 | private void onItemBigResize(View view, RecyclerView recyclerView) { 132 | if (adapter != null) { 133 | adapter.onBigItemResize(recyclerView.getChildViewHolder(view), itemToResize, getOffsetAccordingToHeight(view.getHeight())); 134 | } 135 | } 136 | 137 | private float getTopOfView(View view) { 138 | return Math.abs(view.getTop()); 139 | } 140 | 141 | public void setAdapter(Adapter adapter) { 142 | if (adapter instanceof FeatureRecyclerViewAdapter) { 143 | this.adapter = (FeatureRecyclerViewAdapter) adapter; 144 | } 145 | super.setAdapter(adapter); 146 | } 147 | } 148 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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