Remove all unused resources from an android project

Question

I want to remove all unused layouts  strings  drawables  colors  etc from my Android res directory  Are there any tools that will give me a list of files and I can remove from my repository and elements within specifics files  e g  unused string entries  that are no longer used

User · Answer

Since Support for the ADT in Eclipse has ended  we have to use Android Studio   In Android Studio 2 0  use Refactor  gt  Remove Unused Resources

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Since ADT 16 you can use Android Lint  It is really amazing tool      Android Lint is a new tool for ADT 16  and Tools 16  which scans Android project sources for potential bugs        Here are some examples of the types of errors that it looks for          Missing translations  and unused translations    Layout performance problems  all the issues the old layoutopt tool used to find  and more    Unused resources   Inconsistent array sizes  when arrays are defined in multiple configurations    Accessibility and internationalization problems  hardcoded strings  missing contentDescription  etc    Icon problems  like missing densities  duplicate icons  wrong sizes  etc    Usability problems  like not specifying an input type on a text field    Manifest errors and many more       However  it has some issues  don t know if they re already fixed  and if you want to delete hundreds of supposedly unused resources I d recommend to manually compile project several times during resource removing to be sure that Lint didn t remove something needed

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On Windows   Press Ctlr Alt Shift i one dialog box will appear  then type unused  you will find number of options select and remove unused resources

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We open source a tool that removes all the unused resources in your android project based on the lint output  It can be found here  https   github com KeepSafe android-resource-remover

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When we define shrink resources true that time we can also define which resources we wanna keep and which don t  I have added xml file in res raw folder named keep xml  before going further generate a single signed build and check in apk analyser tool which will show drawable-xhdpi-v4 has messenger button send round shadow png which i want to remove for this test   lt  xml version  1 0  encoding  utf-8   gt   lt resources xmlns tools  http   schemas android com tools         tools shrinkMode  strict         tools discard   drawable com facebook button icon blue png          drawable com facebook button icon white png          drawable com facebook button like icon selected png          drawable messenger button send round shadow png          drawable messenger       gt    by doing messenger   all files starting from name messenger in drawable folder will be removed or other way around is i have defines specific file to be removed  so that way you can remove files from library it self you can also remove layouts by  layout layout name if that drawable has been used by layout and so

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You can easily search for unused resources from Android Studio  Just press CtrlAltShifti and type  unused resources   without quotes   That will execute lint  Super easy way to run lint commands  and other stuff from IDE    OR  In Android Studio Menu   Refactor   Remove Unused Resources     Select the resources you want to remove  You can exclude resources you want to keep by right-clicking on the resource item   Use Do Refactor to remove all Resources at once   Update  use  OptionShifti for mac

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To check string xml   It s easy  at least in my version of Eclipse   In Eclipse for Android  I have version v22 6 2-1085508    Left click on the project name in  Package explorer  Select  Android Tools   Select  Run Lint  Check for common Errors     Now when you open strings xml  you will see that unused string are highlighted   You can fix other potential issues

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The Gradle build system for Android supports  resource shrinking   the automatic removal of resources that are unused  at build time  in the packaged app  In addition to removing resources in your project that are not actually needed at runtime  this also removes resources from libraries you are depending on if they are not actually needed by your application   To enable this add the line shrinkResources true in your gradle file      android                        buildTypes               release                   minifyEnabled true   Important step                 shrinkResources true                        Check the official documentation here   http   tools android com tech-docs new-build-system resource-shrinking

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Attention Android Wear developers   Remove Unused Resources  will delete the xml file where you declare the capability name  res values wear xml  and the phone won t be able to connect to the watch  I spent hours trying to figure out this bug in my app

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After you run Lint in Android Studio and find all the unused resources  you can click on one of them from the Inspection tab  It provides some detail about the issue and a few options to fix it  One of them is Remove All Unused Resources  Selecting that option deletes all the unused resources

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Maybe useful Andround Unused Resources is a Java application that will scan your project for unused resources  Unused resources needlessly take up space  increase the build time  and clutter the IDE s autocomplete list   To use it  ensure your working directory is the root of your Android project  and run   java -jar AndroidUnusedResources jar  https   code google com p android-unused-resources

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In Android Studio 2 0 and above in menu select Refactor-- click on Remove Unused Resources      or   shortcut also available  Press  Ctlr Alt Shift i one dialog box will apper  then type unused   you will find number of options  select and remove unused resources

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There really excellent answers in here suggesting good tools  But if you are intending to remove png-drawables  or other image files   you should also consider moving all the drawable-xxxx folders out of your project into a temporary folder  then do a rebuild all  and take a look at the build message list which will tell you which ones are missing   This can be specially useful if you want to get an overview of which resources you are effectively using and maybe replace them with an icon font or svg resources  possibly with the help of the Android Iconics library

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Android Assets Viewer is designed to help visually inspect the graphics packed  as drawables  within your  apk  you can also just upload a zip file of your res folder if you prefer    http   www cellebellum net AndroidAssetsViewer   So for removing unused resources  this might work well in tandem with the Lint checks to help make sure everything that should be there is  It also helps you identify a few other potential problems with your drawables  wrong bucket  wrong graphic  etc

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Beware if you are using multiple flavours when running lint  Lint may give false unused resources depending on the flavour you have selected

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In Android Studio   Analyze -  Run Inspection by Name    Shortcut For Mac shift command option i     Ctrl   Shift   A on Windows Linux    And type  unused resources     This way you can remove unused resources  variables  symbols  localization  libraries   etc   Select the desired inspection from the list  then select inspection scope - OK

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shift double click on Windows then type  quot unused quot   you will find an option Remove unused Resources  also  android           buildTypes               release                   minifyEnabled true                 shrinkResources true                       when you set these settings on  AS will automatically remove unused resources

[android] Remove all unused resources from an android project

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