Android Studio build fails with Task not found in root project MyProject

Question

I get this error when trying to build my project after changing laptop and updating to Android Studio version 0 8 2      FAILURE  Build failed with an exception          What went wrong    Task    not found in root project  MyProject     Try    Run gradle tasks to get a list of available tasks  Run with --stacktrace option to get the stack trace  Run with --info or --debug option to get more log output          BUILD FAILED   Here are my Gradle files   Top Level settings gradle  include   MyProject    build gradle in MyProject   apply plugin   com android application   buildscript       repositories           mavenCentral             dependencies           classpath  com android tools build gradle 0 12            repositories       mavenCentral      android       compileSdkVersion 20     buildToolsVersion  20       defaultConfig           minSdkVersion 14         targetSdkVersion 20          dependencies       compile  de timroes android EnhancedListView 0 3 0 aar      compile  com nineoldandroids library 2 4 0      Top level build gradle is empty

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I got this problem because it could not find the Android SDK path  I was missing a local properties file with it or an ANDROID HOME environment variable with it

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In my case  I meet this problem that compile options in Android Studio is  stacktrace   Modify stacktrace to --stacktrace  the problem solved

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Remove    lt facet type  android  name  Android  gt       lt configuration   gt   lt  facet gt    in your iml file  That works for me   https   plus google com  AlexRuiz posts 49hP3V9GSGe

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Apparently this issue caused by Android Studio on the various situation but the reason is build error When importing an existing project into android studio  In my case  I ve imported my exist project where I was supposed to install few build tools then finally build configuration was done with error  In this case  just do the following things   Close the current project File New Import Project  Don t use the open recent project   Note  I m sure this kind of error is not on source code when this happened on Import project

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Problem  I specifically got the   module name  prepareDebugUnitTestDependencies  task not found error  every time I ran gradle build  This happened to me after updating my Android Studio to 3 0 0   Investigation  I had previously added command-line options to the gradle-based compiler  which you can find under  File -  Settings -  Build  Execution  Deployment -  Compiler -  Command-line Options  Specifically  I had excluded a number of tasks  including the aforementioned task  While that worked fine on the previous stable version  2 3 at that time   it seems like this was the reason behind the build failure   Solution  This is one of many possible solutions  Make sure you have the correct command-line options specified in the settings under  File -  Settings -  Build  Execution  Deployment -  Compiler -  Command-line Options  and that none of them is causing this problem   In my case  I removed the exclusion of this task  and other tasks that seemed related   left the unrelated tasks excluded  and it worked

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Download system image of targeted android level of your project  from sdk manager for the project you have imported   This error comes when you do not have target sdk of your android project installed in sdk folder  for eg  Your imported project s target sdk level may be android-19 and on sdk folder- system-images you may have android-21 installed  so you have to download android-19 system image and other files from sdk manager or you can copy paste it if you have the system image

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I remove Rename  gradle folder in c  users Myuser  gradle and restart Android Studio and worked for me

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This is what I did   Remove  idea folder       mv  idea  idea bak  Import the project again

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Apparently this error has multiple causes  Here s what fixed it for me   I was running the build command like this     gradlew  testapp  build   Running it without the space fixed the issue     gradlew  testapp build

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Sometimes  if you have opened two windows of Android Studio  and when you try to compile  this issue might happen  For me  when I was compiling a backed Google Cloud Endpoint module which was not embedded in a project  rather shared among different Android Studio projects  and when there is more than once instance open  this error use to spring up for me  But as soon as you close other windows  everything will be fine  Sometimes  you might have to restart Android Studio altogether

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I have solved this problem You just need to Create file in Android Folder  Go android folder  Create file local properties  then just add this code in local properties file -  If you are using MacBook then sdk dir  Users USERNAME Library android sdk  if you are using Windows then sdk dir C  Users USERNAME AppData Local Android sdk  if you are using Linux then sdk dir    home USERNAME Android sdk  if you want to know what is your system USERNAME then just use command for Mac whoami  and then just rerun command react-native run-android  Thanks

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Though late in answering  this is a hard one to Google  the single quotes  and it   s not clear what   s happening   I don t have the reputation yet to comment or ask for scope  or post 3 links   so this answer may be a little tedious    To answer fast  you may have multiple Gradle plugins in your project   Synchronize Gradle Wrapper and Plugins  My issue seemed to start with a corrupted IML file  Android Studio  between closing and reopening a project  began complaining an IML was gone  it wasn   t  and a module should be deleted  which I declined  It persisted  I upgraded to AS 0 8 7  canary channel  and got stuck on the OP issue  Task    not found in root project   This completely blocked builds so I had to dig in to Gradle   My repair steps on OSX  please adjust for Windows     Upgrade Android Studio to 0 8 7  Preferences   Updates   Switch  Beta Channel  to  Canary Channel   then do a Check Now  You might be able to skip this   Checked the Gradle wrapper  currently 1 12 2  don   t try to use 2 0 at this time     Assuming you don   t need a particular version  use the latest supported distribution    vi   project gradle-wrapper properties     distributionUrl http    services gradle org distributions gradle-1 12-all zip This can be set in Android Studio at Preferences   Gradle   but 0 8 7 was giving me    invalid location    errors   The  wrapper  is just a copy of Gradle for each Android Studio project  It allows you to have Gradle 2 in your OS  and different versions in your projects  The Android Developer docs explain that here  Then adjust your build gradle files for the plugin  The Gradle plugin version must be compatible with the distribution wrapper version  for the whole project  As the Tools documentation  tools android com tech-docs new-build-system user-guide TOC-Requirements  is slightly out of date  you can set the plugin version too low  like 0 8 0  and Android Studio will throw an error with the acceptable range for the wrapper     Example  in build gradle  you have this plugin   dependencies       classpath  com android tools build gradle 0 12        You can try switching it to the exact version  like this   dependencies       classpath  com android tools build gradle 0 12 2      and  after recording what version you   re changing from in each case  verifying that every build gradle file in your project pulls in the same plugin version  Keeping the         should work  for 0 12 0  0 12 1  0 12 2  etc   but my build succeeded when I updated Google   s Volley library  originally gradle 0 8    and my main project  originally 0 12    to the fixed version  gradle 0 12 2    Other checks   Ensure you don   t have two Android Application modules in the same Project   This may interact with the final solution  different Gradle versions  above   and cause  UNEXPECTED TOP-LEVEL EXCEPTION  com android dex DexException  Multiple dex files define  various classes  To check  Build   Make Project should not pop up a window asking what application you want to make   Invalidate your caches  File   Invalidate Caches   Restart    stackoverflow com a 19223269 513413   If step 2 doesn t work  delete    gradle     www wuttech com index php tag groovy-lang-closure    Quit Android Studio   rm -rf    gradle  Start Android Studio  then sync   Tools   Android   Sync Project with Gradle Files  Repeat this entire sequence  quit   sync  a few times before giving up   Clean the project  Build   Clean Project    If You See This     In my recent builds  I kept seeing horrible fails  pages of exceptions  but within seconds the messages would clear  build succeeded and the app deployed  Since I could never explain it and the app worked  I never noticed that I had two Gradle plugins in my project  So I think the Gradle plugins fought each other  one crashed  the other lost its state and reported the error   If you have time  the 1-hour video  A Gentle Introduction to Gradle   www youtube com watch v OFUEb7pLLXw  really helped me approach the Gradle build files  tasks  build decisions  etc   Disclaimer  I m learning this entire stack  on a foreign OS  after working a different career   all at the same time and under pressure  In the last few months I have hit every wall I think Android has  I ve been here quite often and this is my first post  I thought this was a hard fix  so I sincerely apologize if the quality of my answer reflects the difficulty I had in getting to it

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Yet another solution to the same problem   This happened to me every time I imported an eclipse project into studio using the wizard  studio version 1 3 2    What I found  quite by chance  was that quitting out of Android studio and then restarting studio again made the problem go away   Frustrating  but hope this helps someone

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Simple fix for me was    Build   Clean project Restart Android Studio

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This happened to me recently when I close one Android Studio project and imported another Eclipse project  It seemed to be some bug in Android Studio where it preserves some gradle settings from previously open project and then get confused in the new project   The solution was extremely simple  Close the project and shut down Android Studio completely  before re-opening it and then import open the new project  Everything goes smoothly from then on

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In my case  setting the  Gradle version  same as the  Android Plugin version  under File- Project Structure- Project fixed the issue for me

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I got this error when switching from one Git branch to another  and then trying to run  Clean Project    I used ack to search for the Task name  and found it in a  iml file   My solution was to regenerate the project s  iml file by clicking  in the main menu  Tools   Android   Sync Project with Gradle Files    Thanks to this answer

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Open Command Prompt then go your project folder thru Command prompt Type gradlew build and run

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Set the path of the root folder and after run the below command  ex   cd C  Users maha Documents gradle gs-gradle-master initial

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Make sure you have the latest values in your gradle files   As of this writing    buildToolsVersion  21 1 2  dependencies      classpath  com android tools build gradle 1 1 0

[android] Android Studio build fails with "Task '' not found in root project 'MyProject'."

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