Conflict with dependency com android support support-annotations in project app Resolved versions for app 26 1 0 and test app 27 1 1 differ

Question

I am new to Android App Development  When I tried to create a new project Android Project   the following message popped up    Error Execution failed for task   app preDebugAndroidTestBuild       Conflict with dependency  com android support support-annotations  in project   app   Resolved versions for app  26 1 0  and test app  27 1 1  differ  See https   d android com r tools test-apk-dependency-conflicts html for details    Information Gradle tasks   app generateDebugSources   app generateDebugAndroidTestSources   app mockableAndroidJar    This is the screenshot of my project click here to see screenshot of the error i got  i also tried adding this code to my dependency   androidTestCompile  com android support support-annotations 23 3 0  this didn t work out  I also tried 27 1 1 and 26 1 0   that didn t work out either

User · Answer

Important Update

Go to project level build.gradle, define global variables

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlinVersion = '1.2.61'

    ext.global_minSdkVersion = 16
    ext.global_targetSdkVersion = 28
    ext.global_buildToolsVersion = '28.0.1'
    ext.global_supportLibVersion = '27.1.1'
}

Go to app level build.gradle, and use global variables

app build.gradle

android {
    compileSdkVersion global_targetSdkVersion
    buildToolsVersion global_buildToolsVersion
    defaultConfig {
        minSdkVersion global_minSdkVersion
        targetSdkVersion global_targetSdkVersion
}
...

dependencies {
    implementation "com.android.support:appcompat-v7:$global_supportLibVersion"
    implementation "com.android.support:recyclerview-v7:$global_supportLibVersion"
    // and so on...
}

some library build.gradle

android {
    compileSdkVersion global_targetSdkVersion
    buildToolsVersion global_buildToolsVersion
    defaultConfig {
        minSdkVersion global_minSdkVersion
        targetSdkVersion global_targetSdkVersion
}
...

dependencies {
    implementation "com.android.support:appcompat-v7:$global_supportLibVersion"
    implementation "com.android.support:recyclerview-v7:$global_supportLibVersion"
    // and so on...
}

The solution is to make your versions same as in all modules. So that you don't have conflicts.

Important Tips

I felt when I have updated versions of everything- gradle, sdks, libraries etc. then I face less errors. Because developers are working hard to make it easy development on Android Studio.

Always have latest but stable versions Unstable versions are alpha, beta and rc, ignore them in developing.

I have updated all below in my projects, and I don't face these errors anymore.

Update Android Studio (Track release)
Project level build.gradle - classpath 'com.android.tools.build:gradle:3.2.0' (Track android.build.gradle release & this)
Have updated buildToolVersion (Track buildToolVersion release)
Have latest compileSdkVersion and targetSdkVersion Track platform release
Have updated library versions, because after above updates, its necessary. (@See How to update)

Happy coding! :)

User · Answer

If you use version 26 then inside dependencies version should be 1 0 1 and 3 0 1 i e   as follows    androidTestImplementation  com android support test runner 1 0 1    androidTestImplementation  com android support test espresso espresso-core 3 0 1    If you use version 27 then inside dependencies version should be 1 0 2 and 3 0 2 i e   as follows    androidTestImplementation  com android support test runner 1 0 2    androidTestImplementation  com android support test espresso espresso-core 3 0 2

User · Answer

Go to the build gradle Module App  in your project     Follow the pic and change those version   compileSdkVersion  27 targetSdkVersion  27   and if android studio version 2  Change the line with this line    compile  com android support appcompat-v7 27 1 1    else Change the line with this line   implementation  com android support appcompat-v7 27 1 1    and hopefully  you will solve your bug

User · Answer

This is due a conflict of versions  to solve it  just force an update of your support-annotations version  adding this line on your module  app gradle  implementation   com android support support-annotations 27 1 1    Hope this solves your issue     Edit  Almost forgot  you can declare a single extra property  https   docs gradle org current userguide writing build scripts html sec extra properties  for the version  go to your project  or your top  gradle file  and declare your support  or just for this example  annotation version var  ext annotation version    27 1 1   Then in your module gradle replace it with   implementation   com android support support-annotations  annotation version    This is very similar to the  emadabel solution  which is a good alternative for doing it  but without the block  or the rootproject prefix

User · Answer

Based on your screenshot i found two working solutions   First solution  add to dependencies of your gradle module this line  compile  com android support support-annotations 27 1 1    and sync your project  Note  if you are using Android studio 3  change compile to implementation  Second solution  Configure project-wide properties found in the documentation https   developer android com studio build gradle-tips html configure-project-wide-properties  in project gradle add this line      This block encapsulates custom properties and makes them available to all    modules in the project  ext          The following are only a few examples of the types of properties you can define      compileSdkVersion   26        You can also use this to specify versions for dependencies  Having consistent        versions between modules can avoid behavior conflicts      supportLibVersion    27 1 1      Then to access this section change compileSdkVersionline to be  compileSdkVersion rootProject ext compileSdkVersion  and at dependencies section change the imported library to be like this   compile  com android support appcompat-v7   rootProject ext supportLibVersion     and sync your project  Note  if you are using Android studio 3  change compile to implementation  For the difference between compile and implementation look at this What  39 s the difference between implementation and compile in gradle

User · Answer

I have the same problem  in build gradle  Module app  add the following line of code inside dependencies   dependencies              compile  com android support support-annotations 27 1 1      It worked for me perfectly

User · Answer

Add the below line in your app gradle file before depencencies block   configurations all       resolutionStrategy           force  com android support support-annotations 26 1 0            There s also screenshot below for a better understanding      the configurations all block will only be helpful if you want your target sdk to be 26  If you can change it to 27 the error will be gone without adding the configuration block in app gradle file  There is one more way if you would remove all the test implementation from app gradle file it would resolve the error and in this also you dont need to add the configuration block nor you need to change the targetsdk version    Hope that helps

User · Answer

If changing target sdk version doesn t help then if you have any dependency with version 3 0 2 then change it to 3 0 1   e g change  androidTestImplementation  com android support test espresso espresso-contrib 3 0 2    to  androidTestImplementation  com android support test espresso espresso-contrib 3 0 1

User · Answer

Add this to your gradle file   implementation  com android support support-annotations 27 1 1

User · Answer

Don t worry It is simple  Go to the  quot Project quot  Directory structure and in that go to  quot Gradle Scripts quot  and inside it go to  quot build gradle  Module app  quot  and double click it  Now - Scroll down the program and in that go to the dependencies section   Like below  dependencies   implementation fileTree dir   libs   include      jar    implementation  com android support appcompat-v7 26 1 0  implementation  com android support constraint constraint-layout 1 1 2  testImplementation  junit junit 4 12  androidTestImplementation  com android support test runner 1 0 2  androidTestImplementation  com android support test espresso espresso-core 3 0 2      Now in this Delete the last two lines of code and rebuild the app and now it will work The dependencies should be   dependencies   implementation fileTree dir   libs   include      jar    implementation  com android support appcompat-v7 26 1 0  implementation  com android support constraint constraint-layout 1 1 2  testImplementation  junit junit 4 12      REBUILD THE APP AND IT WORKS

User · Answer

Another simple way to solve this problem is to edit your build gradle  app     Go to android tag and change compileSdkVersion 26 to compileSdkVersion 27 Go to defaultConfig tag and change targetSdkVersion 26 to targetSdkVersion 27 Got to dependencies tag and change implementation  com android support appcompat-v7 26 1 0  to implementation  com android support appcompat-v7 27 1 1

User · Answer

Adding this to build gradle  Module app  worked for me  compile  com android support support-annotations 27 1 1

User · Answer

If you using Android Studio 3 1   or above  just put this in your gradle depedencies   implementation  com android support support-annotations 27 1 1    Overall like this   dependencies       implementation fileTree dir   libs   include      jar        implementation  com android support appcompat-v7 26 1 0      implementation  com android support constraint constraint-layout 1 1 2      testImplementation  junit junit 4 12      androidTestImplementation  com android support test runner 1 0 2      androidTestImplementation  com android support test espresso espresso-core 3 0 2       implementation  com android support support-annotations 27 1 1

User · Answer

Add this line under the dependencies in your gradle file  compile  com android support support-annotations 27 1 1

User · Answer

A better solution is explained in the official explanation  I left the answer I have given before under the horizontal line   According to the solution there   Use an external tag and write down the following code below in the top-level build gradle file  You re going to change the version to a variable rather than a static version number   ext       compileSdkVersion   26     supportLibVersion    27 1 1      Change the static version numbers in your app-level build gradle file  the one has  Module  app  near   android       compileSdkVersion rootProject ext compileSdkVersion    It was 26 for example        the below lines will stay       here there are some other stuff maybe  dependencies       implementation  com android support appcompat-v7   rootProject ext supportLibVersion          the below lines will stay     Sync your project and you ll get no errors     You don t need to add anything to Gradle scripts  Install the necessary SDKs and the problem will be solved   In your case  install the libraries below from Preferences   Android SDK or Tools   Android   SDK Manager

[android] Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ.

Important Update

Go to project level build.gradle, define global variables

Go to app level build.gradle, and use global variables

Important Tips

Examples related to android