├── .gitignore ├── .travis.yml ├── CHANGELOG.md ├── LICENSE.txt ├── README.md ├── art ├── ic_launcher.png └── img_promo.jpg ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── multibackstack-sample ├── build.gradle └── src │ └── main │ ├── AndroidManifest.xml │ ├── java │ └── com │ │ └── jetradar │ │ └── multibackstack │ │ └── sample │ │ ├── ItemFragment.java │ │ ├── ItemListFragment.java │ │ └── MainActivity.java │ └── res │ ├── drawable │ ├── ic_favorite_24dp.xml │ ├── ic_profile_24dp.xml │ └── ic_search_24dp.xml │ ├── layout │ ├── activity_main.xml │ └── fragment_item.xml │ ├── mipmap-hdpi │ └── ic_launcher.png │ ├── mipmap-mdpi │ └── ic_launcher.png │ ├── mipmap-xhdpi │ └── ic_launcher.png │ ├── mipmap-xxhdpi │ └── ic_launcher.png │ ├── mipmap-xxxhdpi │ └── ic_launcher.png │ ├── values-w820dp │ └── dimens.xml │ └── values │ ├── colors.xml │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml ├── multibackstack ├── build.gradle └── src │ └── main │ ├── AndroidManifest.xml │ └── java │ └── com │ └── jetradar │ └── multibackstack │ ├── BackStack.java │ ├── BackStackActivity.java │ ├── BackStackEntry.java │ └── BackStackManager.java └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | # IntelliJ IDEA 2 | .idea/ 3 | *.iml 4 | 5 | # Gradle files 6 | .gradle/ 7 | build/ 8 | 9 | # Local configuration file (sdk path, etc) 10 | local.properties -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: android 2 | jdk: oraclejdk8 3 | 4 | android: 5 | components: 6 | - tools 7 | - platform-tools 8 | - tools 9 | 10 | - android-25 11 | - build-tools-25.0.3 12 | - extra-google-m2repository 13 | - extra-android-m2repository 14 | 15 | cache: 16 | directories: 17 | - $HOME/.m2 18 | - $HOME/.gradle -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | Change Log 2 | ========== 3 | 4 | 5 | ## Version 1.2.1 6 | 7 | _2017-05-01_ 8 | 9 | Implemented the ability to get the number of fragments in the stack `backStackSize()`. 10 | 11 | 12 | ## Version 1.2.0 13 | 14 | _2016-07-11_ 15 | 16 | Improved implementation. 17 | 18 | 19 | ## Version 1.0.0 20 | 21 | _2016-05-26_ 22 | 23 | Initial release. 24 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Android-MultiBackStack 2 | ====================== 3 | 4 | [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-MultiBackStack-brightgreen.svg?style=flat)](http://android-arsenal.com/details/1/3636) 5 | [![JitPack](https://jitpack.io/v/jetradarmobile/multibackstack.svg)](https://jitpack.io/#jetradarmobile/multibackstack) 6 | [![API](https://img.shields.io/badge/API-9%2B-brightgreen.svg?style=flat)](https://android-arsenal.com/api?level=9) 7 | [![TravisCI](https://travis-ci.org/JetradarMobile/android-multibackstack.svg?branch=master)](https://travis-ci.org/JetradarMobile/android-multibackstack) 8 | [![AndroidDev Digest](https://img.shields.io/badge/AndroidDev%20Digest-%2396-blue.svg)](https://www.androiddevdigest.com/digest-96/) 9 | 10 | Implementation of the multiple back stacks. Using this library allows implementation of persistent [bottom navigation][1] like in [instagram][2]. 11 | 12 | ![image][3] 13 | 14 | This library we use in our app [Hotellook][5]. 15 | 16 | 17 | Compatibility 18 | ------------- 19 | 20 | This library is compatible from API 9 (Android 2.3). 21 | 22 | 23 | Download 24 | -------- 25 | 26 | Add it in your root build.gradle at the end of repositories: 27 | 28 | ```groovy 29 | allprojects { 30 | repositories { 31 | ... 32 | maven { url "https://jitpack.io" } 33 | } 34 | } 35 | ``` 36 | 37 | Add the dependency 38 | 39 | ```groovy 40 | dependencies { 41 | compile 'com.github.jetradarmobile:multibackstack:1.2.1' 42 | } 43 | ``` 44 | 45 | 46 | Usage 47 | ----- 48 | 49 | See [sample][4] project for understanding how it works. 50 | 51 | 52 | License 53 | ------- 54 | 55 | Copyright 2016 JetRadar 56 | 57 | Licensed under the Apache License, Version 2.0 (the "License"); 58 | you may not use this file except in compliance with the License. 59 | You may obtain a copy of the License at 60 | 61 | http://www.apache.org/licenses/LICENSE-2.0 62 | 63 | Unless required by applicable law or agreed to in writing, software 64 | distributed under the License is distributed on an "AS IS" BASIS, 65 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 66 | See the License for the specific language governing permissions and 67 | limitations under the License. 68 | 69 | 70 | [1]: https://www.google.com/design/spec/components/bottom-navigation.html 71 | [2]: https://play.google.com/store/apps/details?id=com.instagram.android 72 | [3]: https://raw.githubusercontent.com/JetradarMobile/multibackstack/master/art/img_promo.jpg 73 | [4]: https://github.com/JetradarMobile/android-multibackstack/tree/master/multibackstack-sample 74 | [5]: https://play.google.com/store/apps/details?id=com.hotellook 75 | -------------------------------------------------------------------------------- /art/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/art/ic_launcher.png -------------------------------------------------------------------------------- /art/img_promo.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/art/img_promo.jpg -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | buildscript { 2 | repositories { 3 | jcenter() 4 | } 5 | dependencies { 6 | classpath 'com.android.tools.build:gradle:2.3.1' 7 | } 8 | } 9 | 10 | allprojects { 11 | repositories { 12 | jcenter() 13 | } 14 | } 15 | 16 | ext { 17 | compileSdkVersion = 25 18 | buildToolsVersion = '25.0.3' 19 | 20 | supportDesign = 'com.android.support:design:25.3.1' 21 | supportAppCompat = 'com.android.support:appcompat-v7:25.3.1' 22 | bottomNavigationBar = 'com.ashokvarma.android:bottom-navigation-bar:1.4.1' 23 | } 24 | 25 | task clean(type: Delete) { 26 | delete rootProject.buildDir 27 | } -------------------------------------------------------------------------------- /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 | # Default value: -Xmx10248m -XX:MaxPermSize=256m 13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 14 | 15 | # When configured, Gradle will run in incubating parallel mode. 16 | # This option should only be used with decoupled projects. More details, visit 17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 18 | # org.gradle.parallel=true -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Sun Jan 08 22:38:21 MSK 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 | -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /multibackstack-sample/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | dependencies { 4 | compile project(':multibackstack') 5 | compile rootProject.ext.supportDesign 6 | compile rootProject.ext.bottomNavigationBar 7 | } 8 | 9 | android { 10 | compileSdkVersion rootProject.ext.compileSdkVersion 11 | buildToolsVersion rootProject.ext.buildToolsVersion 12 | 13 | defaultConfig { 14 | applicationId "com.jetradar.multibackstack.sample" 15 | minSdkVersion 16 16 | targetSdkVersion rootProject.ext.compileSdkVersion 17 | versionCode 1 18 | versionName "1.0" 19 | } 20 | } -------------------------------------------------------------------------------- /multibackstack-sample/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 5 | 6 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/java/com/jetradar/multibackstack/sample/ItemFragment.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack.sample; 18 | 19 | import android.os.Bundle; 20 | import android.support.annotation.Nullable; 21 | import android.support.v4.app.Fragment; 22 | import android.support.v7.app.ActionBar; 23 | import android.view.LayoutInflater; 24 | import android.view.MenuItem; 25 | import android.view.View; 26 | import android.view.ViewGroup; 27 | import android.widget.TextView; 28 | 29 | public class ItemFragment extends Fragment { 30 | private static final String ARG_ITEM = "item"; 31 | 32 | private String item; 33 | 34 | public ItemFragment() {} 35 | 36 | public static ItemFragment newInstance(String item) { 37 | ItemFragment fragment = new ItemFragment(); 38 | Bundle args = new Bundle(); 39 | args.putString(ARG_ITEM, item); 40 | fragment.setArguments(args); 41 | return fragment; 42 | } 43 | 44 | @Override 45 | public void onCreate(Bundle savedInstanceState) { 46 | super.onCreate(savedInstanceState); 47 | item = getArguments().getString(ARG_ITEM); 48 | } 49 | 50 | @Override 51 | public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 52 | return inflater.inflate(R.layout.fragment_item, container, false); 53 | } 54 | 55 | @Override 56 | public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 57 | setUpActionBar(); 58 | 59 | TextView textView = (TextView) view.findViewById(R.id.text); 60 | textView.setText(item); 61 | } 62 | 63 | @Override 64 | public boolean onOptionsItemSelected(MenuItem item) { 65 | switch (item.getItemId()) { 66 | case android.R.id.home: 67 | getActivity().onBackPressed(); 68 | return true; 69 | } 70 | return super.onOptionsItemSelected(item); 71 | } 72 | 73 | @SuppressWarnings("ConstantConditions") 74 | private void setUpActionBar() { 75 | ActionBar actionBar = ((MainActivity) getActivity()).getSupportActionBar(); 76 | actionBar.setDisplayHomeAsUpEnabled(true); 77 | actionBar.setTitle(item); 78 | setHasOptionsMenu(true); 79 | } 80 | } -------------------------------------------------------------------------------- /multibackstack-sample/src/main/java/com/jetradar/multibackstack/sample/ItemListFragment.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack.sample; 18 | 19 | import android.os.Bundle; 20 | import android.support.annotation.Nullable; 21 | import android.support.v4.app.ListFragment; 22 | import android.support.v7.app.ActionBar; 23 | import android.view.View; 24 | import android.widget.ArrayAdapter; 25 | import android.widget.ListView; 26 | 27 | import java.util.ArrayList; 28 | import java.util.List; 29 | 30 | public class ItemListFragment extends ListFragment { 31 | private static final String ARG_SECTION = "section"; 32 | 33 | private List items; 34 | 35 | public ItemListFragment() {} 36 | 37 | public static ItemListFragment newInstance(String section) { 38 | ItemListFragment fragment = new ItemListFragment(); 39 | Bundle args = new Bundle(); 40 | args.putString(ARG_SECTION, section); 41 | fragment.setArguments(args); 42 | return fragment; 43 | } 44 | 45 | @Override 46 | public void onCreate(Bundle savedInstanceState) { 47 | super.onCreate(savedInstanceState); 48 | String section = getArguments().getString(ARG_SECTION); 49 | items = createItemsForSection(section); 50 | } 51 | 52 | @Override 53 | public void onActivityCreated(@Nullable Bundle savedInstanceState) { 54 | super.onActivityCreated(savedInstanceState); 55 | setUpActionBar(); 56 | 57 | ArrayAdapter adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, items); 58 | setListAdapter(adapter); 59 | } 60 | 61 | @Override 62 | public void onListItemClick(ListView l, View v, int position, long id) { 63 | ((MainActivity) getActivity()).showFragment(ItemFragment.newInstance(items.get(position))); 64 | } 65 | 66 | private List createItemsForSection(String section) { 67 | int itemsNumber = 10; 68 | List items = new ArrayList<>(itemsNumber); 69 | for (int i = 0; i < itemsNumber; i++) { 70 | items.add(section + " " + (i + 1)); 71 | } 72 | return items; 73 | } 74 | 75 | @SuppressWarnings("ConstantConditions") 76 | private void setUpActionBar() { 77 | ActionBar actionBar = ((MainActivity) getActivity()).getSupportActionBar(); 78 | actionBar.setDisplayHomeAsUpEnabled(false); 79 | actionBar.setTitle(R.string.app_name); 80 | } 81 | } -------------------------------------------------------------------------------- /multibackstack-sample/src/main/java/com/jetradar/multibackstack/sample/MainActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack.sample; 18 | 19 | import android.os.Bundle; 20 | import android.support.annotation.NonNull; 21 | import android.support.v4.app.Fragment; 22 | import android.support.v4.app.FragmentManager; 23 | import android.support.v4.app.FragmentTransaction; 24 | import android.support.v4.util.Pair; 25 | 26 | import com.ashokvarma.bottomnavigation.BottomNavigationBar; 27 | import com.ashokvarma.bottomnavigation.BottomNavigationItem; 28 | import com.jetradar.multibackstack.BackStackActivity; 29 | 30 | import static com.ashokvarma.bottomnavigation.BottomNavigationBar.OnTabSelectedListener; 31 | 32 | public class MainActivity extends BackStackActivity implements OnTabSelectedListener { 33 | private static final String STATE_CURRENT_TAB_ID = "current_tab_id"; 34 | private static final int MAIN_TAB_ID = 0; 35 | 36 | private BottomNavigationBar bottomNavBar; 37 | private Fragment curFragment; 38 | private int curTabId; 39 | 40 | @Override 41 | protected void onCreate(Bundle state) { 42 | super.onCreate(state); 43 | setContentView(R.layout.activity_main); 44 | setUpBottomNavBar(); 45 | 46 | if (state == null) { 47 | bottomNavBar.selectTab(MAIN_TAB_ID, false); 48 | showFragment(rootTabFragment(MAIN_TAB_ID)); 49 | } 50 | } 51 | 52 | private void setUpBottomNavBar() { 53 | bottomNavBar = (BottomNavigationBar) findViewById(R.id.bottom_navigation); 54 | bottomNavBar 55 | .addItem(new BottomNavigationItem(R.drawable.ic_search_24dp, R.string.search)) 56 | .addItem(new BottomNavigationItem(R.drawable.ic_favorite_24dp, R.string.favorites)) 57 | .addItem(new BottomNavigationItem(R.drawable.ic_profile_24dp, R.string.profile)) 58 | .initialise(); 59 | bottomNavBar.setTabSelectedListener(this); 60 | } 61 | 62 | @NonNull 63 | private Fragment rootTabFragment(int tabId) { 64 | switch (tabId) { 65 | case 0: 66 | return ItemListFragment.newInstance(getString(R.string.search)); 67 | case 1: 68 | return ItemListFragment.newInstance(getString(R.string.favorites)); 69 | case 2: 70 | return ItemListFragment.newInstance(getString(R.string.profile)); 71 | default: 72 | throw new IllegalArgumentException(); 73 | } 74 | } 75 | 76 | @Override 77 | protected void onRestoreInstanceState(Bundle savedInstanceState) { 78 | super.onRestoreInstanceState(savedInstanceState); 79 | curFragment = getSupportFragmentManager().findFragmentById(R.id.content); 80 | curTabId = savedInstanceState.getInt(STATE_CURRENT_TAB_ID); 81 | bottomNavBar.selectTab(curTabId, false); 82 | } 83 | 84 | @Override 85 | protected void onSaveInstanceState(Bundle outState) { 86 | outState.putInt(STATE_CURRENT_TAB_ID, curTabId); 87 | super.onSaveInstanceState(outState); 88 | } 89 | 90 | @Override 91 | public void onBackPressed() { 92 | Pair pair = popFragmentFromBackStack(); 93 | if (pair != null) { 94 | backTo(pair.first, pair.second); 95 | } else { 96 | super.onBackPressed(); 97 | } 98 | } 99 | 100 | @Override 101 | public void onTabSelected(int position) { 102 | if (curFragment != null) { 103 | pushFragmentToBackStack(curTabId, curFragment); 104 | } 105 | curTabId = position; 106 | Fragment fragment = popFragmentFromBackStack(curTabId); 107 | if (fragment == null) { 108 | fragment = rootTabFragment(curTabId); 109 | } 110 | replaceFragment(fragment); 111 | } 112 | 113 | @Override 114 | public void onTabReselected(int position) { 115 | backToRoot(); 116 | } 117 | 118 | @Override 119 | public void onTabUnselected(int position) {} 120 | 121 | public void showFragment(@NonNull Fragment fragment) { 122 | showFragment(fragment, true); 123 | } 124 | 125 | public void showFragment(@NonNull Fragment fragment, boolean addToBackStack) { 126 | if (curFragment != null && addToBackStack) { 127 | pushFragmentToBackStack(curTabId, curFragment); 128 | } 129 | replaceFragment(fragment); 130 | } 131 | 132 | private void backTo(int tabId, @NonNull Fragment fragment) { 133 | if (tabId != curTabId) { 134 | curTabId = tabId; 135 | bottomNavBar.selectTab(curTabId, false); 136 | } 137 | replaceFragment(fragment); 138 | getSupportFragmentManager().executePendingTransactions(); 139 | } 140 | 141 | private void backToRoot() { 142 | if (isRootTabFragment(curFragment, curTabId)) { 143 | return; 144 | } 145 | resetBackStackToRoot(curTabId); 146 | Fragment rootFragment = popFragmentFromBackStack(curTabId); 147 | assert rootFragment != null; 148 | backTo(curTabId, rootFragment); 149 | } 150 | 151 | private boolean isRootTabFragment(@NonNull Fragment fragment, int tabId) { 152 | return fragment.getClass() == rootTabFragment(tabId).getClass(); 153 | } 154 | 155 | private void replaceFragment(@NonNull Fragment fragment) { 156 | FragmentManager fm = getSupportFragmentManager(); 157 | FragmentTransaction tr = fm.beginTransaction(); 158 | tr.replace(R.id.content, fragment); 159 | tr.commitAllowingStateLoss(); 160 | curFragment = fragment; 161 | } 162 | } -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/drawable/ic_favorite_24dp.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/drawable/ic_profile_24dp.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/drawable/ic_search_24dp.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 8 | 9 | 14 | 15 | 20 | 21 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/layout/fragment_item.xml: -------------------------------------------------------------------------------- 1 | 10 | 11 | 16 | 17 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/multibackstack-sample/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/multibackstack-sample/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/multibackstack-sample/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/multibackstack-sample/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/JetradarMobile/android-multibackstack/dae80951f33432b2e4c7e0cc87f072f967d0afc6/multibackstack-sample/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/values-w820dp/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 64dp 6 | 7 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | #6EC541 3 | #5AA035 4 | #6EC541 5 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/values/dimens.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 16dp 4 | 16dp 5 | 6 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | MultiBackStack 3 | 4 | Search 5 | Favorites 6 | Profile 7 | -------------------------------------------------------------------------------- /multibackstack-sample/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 9 | 10 | 13 | 14 | -------------------------------------------------------------------------------- /multibackstack/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.library' 2 | 3 | dependencies { 4 | compile rootProject.ext.supportAppCompat 5 | } 6 | 7 | android { 8 | compileSdkVersion rootProject.ext.compileSdkVersion 9 | buildToolsVersion rootProject.ext.buildToolsVersion 10 | 11 | defaultConfig { 12 | minSdkVersion 9 13 | } 14 | } -------------------------------------------------------------------------------- /multibackstack/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /multibackstack/src/main/java/com/jetradar/multibackstack/BackStack.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack; 18 | 19 | import android.os.Parcel; 20 | import android.os.Parcelable; 21 | import android.support.annotation.NonNull; 22 | import android.support.annotation.Nullable; 23 | import java.util.Stack; 24 | 25 | public class BackStack implements Parcelable { 26 | public final int hostId; 27 | private final Stack entriesStack = new Stack<>(); 28 | 29 | public BackStack(int hostId) { 30 | this.hostId = hostId; 31 | } 32 | 33 | public void push(@NonNull BackStackEntry entry) { 34 | entriesStack.push(entry); 35 | } 36 | 37 | @Nullable 38 | public BackStackEntry pop() { 39 | return empty() ? null : entriesStack.pop(); 40 | } 41 | 42 | public boolean empty() { 43 | return entriesStack.empty(); 44 | } 45 | 46 | public int size() { 47 | return entriesStack.size(); 48 | } 49 | 50 | @Override 51 | public int describeContents() { 52 | return 0; 53 | } 54 | 55 | @Override 56 | public void writeToParcel(Parcel out, int flags) { 57 | out.writeInt(hostId); 58 | int size = entriesStack.size(); 59 | out.writeInt(size); 60 | for (int i = 0; i < size; i++) { 61 | entriesStack.get(i).writeToParcel(out, flags); 62 | } 63 | } 64 | 65 | private BackStack(Parcel in) { 66 | hostId = in.readInt(); 67 | int size = in.readInt(); 68 | for (int i = 0; i < size; i++) { 69 | entriesStack.push(BackStackEntry.CREATOR.createFromParcel(in)); 70 | } 71 | } 72 | 73 | public static final Creator CREATOR = new Creator() { 74 | 75 | @Override 76 | public BackStack createFromParcel(Parcel in) { 77 | return new BackStack(in); 78 | } 79 | 80 | @Override 81 | public BackStack[] newArray(int size) { 82 | return new BackStack[size]; 83 | } 84 | }; 85 | } -------------------------------------------------------------------------------- /multibackstack/src/main/java/com/jetradar/multibackstack/BackStackActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack; 18 | 19 | import android.os.Bundle; 20 | import android.support.annotation.NonNull; 21 | import android.support.annotation.Nullable; 22 | import android.support.v4.app.Fragment; 23 | import android.support.v4.util.Pair; 24 | import android.support.v7.app.AppCompatActivity; 25 | import android.util.Log; 26 | 27 | public abstract class BackStackActivity extends AppCompatActivity { 28 | private static final String STATE_BACK_STACK_MANAGER = "back_stack_manager"; 29 | 30 | protected BackStackManager backStackManager; 31 | 32 | @Override 33 | protected void onCreate(Bundle state) { 34 | super.onCreate(state); 35 | backStackManager = new BackStackManager(); 36 | } 37 | 38 | @Override 39 | protected void onDestroy() { 40 | backStackManager = null; 41 | super.onDestroy(); 42 | } 43 | 44 | @Override 45 | protected void onSaveInstanceState(Bundle outState) { 46 | super.onSaveInstanceState(outState); 47 | outState.putParcelable(STATE_BACK_STACK_MANAGER, backStackManager.saveState()); 48 | } 49 | 50 | @Override 51 | protected void onRestoreInstanceState(Bundle savedInstanceState) { 52 | super.onRestoreInstanceState(savedInstanceState); 53 | backStackManager.restoreState(savedInstanceState.getParcelable(STATE_BACK_STACK_MANAGER)); 54 | } 55 | 56 | /** 57 | * @return false if failed to put fragment in back stack. Relates to issue: 58 | * java.lang.IllegalStateException: Fragment is not currently in the FragmentManager at 59 | * android.support.v4.app.FragmentManagerImpl.saveFragmentInstanceState(FragmentManager.java:702) 60 | */ 61 | protected boolean pushFragmentToBackStack(int hostId, @NonNull Fragment fragment) { 62 | try { 63 | BackStackEntry entry = BackStackEntry.create(getSupportFragmentManager(), fragment); 64 | backStackManager.push(hostId, entry); 65 | return true; 66 | } catch (Exception e) { 67 | Log.e("MultiBackStack", "Failed to add fragment to back stack", e); 68 | return false; 69 | } 70 | } 71 | 72 | @Nullable 73 | protected Fragment popFragmentFromBackStack(int hostId) { 74 | BackStackEntry entry = backStackManager.pop(hostId); 75 | return entry != null ? entry.toFragment(this) : null; 76 | } 77 | 78 | @Nullable 79 | protected Pair popFragmentFromBackStack() { 80 | Pair pair = backStackManager.pop(); 81 | return pair != null ? Pair.create(pair.first, pair.second.toFragment(this)) : null; 82 | } 83 | 84 | /** 85 | * @return false if back stack is missing. 86 | */ 87 | protected boolean resetBackStackToRoot(int hostId) { 88 | return backStackManager.resetToRoot(hostId); 89 | } 90 | 91 | /** 92 | * @return false if back stack is missing. 93 | */ 94 | protected boolean clearBackStack(int hostId) { 95 | return backStackManager.clear(hostId); 96 | } 97 | 98 | /** 99 | * @return the number of fragments in back stack. 100 | */ 101 | protected int backStackSize(int hostId) { 102 | return backStackManager.backStackSize(hostId); 103 | } 104 | } -------------------------------------------------------------------------------- /multibackstack/src/main/java/com/jetradar/multibackstack/BackStackEntry.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack; 18 | 19 | import android.content.Context; 20 | import android.os.Bundle; 21 | import android.os.Parcel; 22 | import android.os.Parcelable; 23 | import android.support.annotation.NonNull; 24 | import android.support.annotation.Nullable; 25 | import android.support.v4.app.Fragment; 26 | import android.support.v4.app.Fragment.SavedState; 27 | import android.support.v4.app.FragmentManager; 28 | 29 | public class BackStackEntry implements Parcelable { 30 | public final String fname; 31 | public final SavedState state; 32 | public final Bundle args; 33 | 34 | public BackStackEntry(@NonNull String fname, @Nullable SavedState state, @Nullable Bundle args) { 35 | this.fname = fname; 36 | this.state = state; 37 | this.args = args; 38 | } 39 | 40 | @NonNull 41 | public static BackStackEntry create(@NonNull FragmentManager fm, @NonNull Fragment f) { 42 | String fname = f.getClass().getName(); 43 | SavedState state = fm.saveFragmentInstanceState(f); 44 | Bundle args = f.getArguments(); 45 | return new BackStackEntry(fname, state, args); 46 | } 47 | 48 | @NonNull 49 | public Fragment toFragment(@NonNull Context context) { 50 | Fragment f = Fragment.instantiate(context, fname); 51 | f.setInitialSavedState(state); 52 | f.setArguments(args); 53 | return f; 54 | } 55 | 56 | @Override 57 | public int describeContents() { 58 | return 0; 59 | } 60 | 61 | @Override 62 | public void writeToParcel(Parcel out, int flags) { 63 | out.writeString(fname); 64 | out.writeBundle(args); 65 | 66 | if (state == null) { 67 | out.writeInt(NO_STATE); 68 | } else if (state.getClass() == SavedState.class) { 69 | out.writeInt(SAVED_STATE); 70 | state.writeToParcel(out, flags); 71 | } else { 72 | out.writeInt(PARCELABLE_STATE); 73 | out.writeParcelable(state, flags); 74 | } 75 | } 76 | 77 | private BackStackEntry(Parcel in) { 78 | final ClassLoader loader = getClass().getClassLoader(); 79 | fname = in.readString(); 80 | args = in.readBundle(loader); 81 | 82 | switch (in.readInt()) { 83 | case NO_STATE: 84 | state = null; 85 | break; 86 | case SAVED_STATE: 87 | state = SavedState.CREATOR.createFromParcel(in); 88 | break; 89 | case PARCELABLE_STATE: 90 | state = in.readParcelable(loader); 91 | break; 92 | default: 93 | throw new IllegalStateException(); 94 | } 95 | } 96 | 97 | private static final int NO_STATE = -1; 98 | private static final int SAVED_STATE = 0; 99 | private static final int PARCELABLE_STATE = 1; 100 | 101 | public static final Creator CREATOR = new Creator() { 102 | 103 | @Override 104 | public BackStackEntry createFromParcel(Parcel in) { 105 | return new BackStackEntry(in); 106 | } 107 | 108 | @Override 109 | public BackStackEntry[] newArray(int size) { 110 | return new BackStackEntry[size]; 111 | } 112 | }; 113 | } -------------------------------------------------------------------------------- /multibackstack/src/main/java/com/jetradar/multibackstack/BackStackManager.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 JetRadar 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.jetradar.multibackstack; 18 | 19 | import android.os.Parcel; 20 | import android.os.Parcelable; 21 | import android.support.annotation.NonNull; 22 | import android.support.annotation.Nullable; 23 | import android.support.v4.util.Pair; 24 | 25 | import java.util.ArrayList; 26 | import java.util.LinkedList; 27 | import java.util.List; 28 | 29 | public class BackStackManager { 30 | private static final int FIRST_INDEX = 0; 31 | private static final int UNDEFINED_INDEX = -1; 32 | 33 | protected final LinkedList backStacks = new LinkedList<>(); 34 | 35 | public void push(int hostId, @NonNull BackStackEntry entry) { 36 | BackStack backStack = peekBackStack(hostId); 37 | if (backStack == null) { 38 | backStack = new BackStack(hostId); 39 | backStacks.push(backStack); 40 | } 41 | backStack.push(entry); 42 | } 43 | 44 | @Nullable 45 | public BackStackEntry pop(int hostId) { 46 | BackStack backStack = peekBackStack(hostId); 47 | if (backStack == null) { 48 | return null; 49 | } 50 | return pop(backStack); 51 | } 52 | 53 | @Nullable 54 | public Pair pop() { 55 | BackStack backStack = peekBackStack(); 56 | if (backStack == null) { 57 | return null; 58 | } 59 | return Pair.create(backStack.hostId, pop(backStack)); 60 | } 61 | 62 | @NonNull 63 | protected BackStackEntry pop(@NonNull BackStack backStack) { 64 | BackStackEntry entry = backStack.pop(); 65 | assert entry != null; 66 | if (backStack.empty()) { 67 | backStacks.remove(backStack); 68 | } 69 | return entry; 70 | } 71 | 72 | public boolean clear(int hostId) { 73 | BackStack backStack = getBackStack(hostId); 74 | if (backStack == null) { 75 | return false; 76 | } 77 | backStacks.remove(backStack); 78 | return true; 79 | } 80 | 81 | public int backStackSize(int hostId) { 82 | BackStack backStack = getBackStack(hostId); 83 | return backStack!= null ? backStack.size() : 0; 84 | } 85 | 86 | public boolean resetToRoot(int hostId) { 87 | BackStack backStack = getBackStack(hostId); 88 | if (backStack == null) { 89 | return false; 90 | } 91 | resetToRoot(backStack); 92 | return true; 93 | } 94 | 95 | protected void resetToRoot(@NonNull BackStack backStack) { 96 | while (true) { 97 | BackStackEntry entry = backStack.pop(); 98 | assert entry != null; 99 | if (backStack.empty()) { 100 | backStack.push(entry); 101 | return; 102 | } 103 | } 104 | } 105 | 106 | @Nullable 107 | protected BackStack peekBackStack(int hostId) { 108 | int index = indexOfBackStack(hostId); 109 | if (index == UNDEFINED_INDEX) { 110 | return null; 111 | } 112 | BackStack backStack = backStacks.get(index); 113 | if (index != FIRST_INDEX) { 114 | backStacks.remove(index); 115 | backStacks.push(backStack); 116 | } 117 | return backStack; 118 | } 119 | 120 | @Nullable 121 | protected BackStack peekBackStack() { 122 | return backStacks.peek(); 123 | } 124 | 125 | @Nullable 126 | protected BackStack getBackStack(int hostId) { 127 | int index = indexOfBackStack(hostId); 128 | if (index == UNDEFINED_INDEX) { 129 | return null; 130 | } 131 | return backStacks.get(index); 132 | } 133 | 134 | protected int indexOfBackStack(int hostId) { 135 | int size = backStacks.size(); 136 | for (int i = 0; i < size; i++) { 137 | if (backStacks.get(i).hostId == hostId) { 138 | return i; 139 | } 140 | } 141 | return UNDEFINED_INDEX; 142 | } 143 | 144 | @NonNull 145 | public Parcelable saveState() { 146 | return new SavedState(backStacks); 147 | } 148 | 149 | public void restoreState(@Nullable Parcelable state) { 150 | if (state != null) { 151 | SavedState savedState = (SavedState) state; 152 | backStacks.addAll(savedState.backStacks); 153 | } 154 | } 155 | 156 | static class SavedState implements Parcelable { 157 | final List backStacks; 158 | 159 | public SavedState(List backStacks) { 160 | this.backStacks = backStacks; 161 | } 162 | 163 | private SavedState(Parcel in) { 164 | int size = in.readInt(); 165 | backStacks = new ArrayList<>(size); 166 | for (int i = 0; i < size; i++) { 167 | backStacks.add(BackStack.CREATOR.createFromParcel(in)); 168 | } 169 | } 170 | 171 | @Override 172 | public void writeToParcel(Parcel out, int flags) { 173 | int size = backStacks.size(); 174 | out.writeInt(size); 175 | for (int i = 0; i < size; i++) { 176 | backStacks.get(i).writeToParcel(out, flags); 177 | } 178 | } 179 | 180 | @Override 181 | public int describeContents() { 182 | return 0; 183 | } 184 | 185 | public static final Creator CREATOR = new Creator() { 186 | 187 | @Override 188 | public SavedState createFromParcel(Parcel in) { 189 | return new SavedState(in); 190 | } 191 | 192 | @Override 193 | public SavedState[] newArray(int size) { 194 | return new SavedState[size]; 195 | } 196 | }; 197 | } 198 | } -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':multibackstack' 2 | include ':multibackstack-sample' --------------------------------------------------------------------------------