gradle - Conflict with dependency 'com.android.support:support-annotations'. Resolved versions for app (23.1.0) and test app (23.0.1) differ

Question

When building I get the following error:

Conflict with dependency 'com.android.support:support-annotations'. Resolved versions for app (23.1.0) and test app (23.0.1) differ.

These are my gradle dependencies

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:support-v4:23.1.0'
    compile 'com.android.support:appcompat-v7:23.1.0'
    compile 'com.android.support:design:23.1.0'
    compile 'com.android.support:cardview-v7:23.1.0'
    compile 'com.android.support:recyclerview-v7:23.1.0'
    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.squareup.okhttp:okhttp:2.4.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.squareup:otto:1.3.8'
    compile 'com.snappydb:snappydb-lib:0.5.2'
    compile 'com.esotericsoftware.kryo:kryo:2.24.0'
    compile 'com.google.dagger:dagger:2.0.1'
    apt 'com.google.dagger:dagger-compiler:2.0.1'
    compile 'javax.annotation:javax.annotation-api:1.2'
    compile 'io.reactivex:rxandroid:1.0.1'
    compile 'io.reactivex:rxjava:1.0.14'
    compile 'com.google.android.gms:play-services-location:8.1.0'
    compile 'com.google.android.gms:play-services-gcm:8.1.0'
    compile 'org.apache.commons:commons-lang3:3.4'
    testCompile 'junit:junit:4.12'
    testCompile 'org.hamcrest:hamcrest-library:1.3'
    testCompile 'org.mockito:mockito-core:1.10.19'
    androidTestCompile 'com.android.support.test:runner:0.4'
    androidTestCompile 'com.android.support.test:rules:0.4'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
    androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2.1'
    androidTestCompile 'com.android.support.test.espresso:espresso-web:2.2.1'
    debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3.1'
    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3.1'
}

How can I fix this?

Answer 1

You can force the annotation library in your test using:

androidTestCompile 'com.android.support:support-annotations:23.1.0'

Something like this:

  // Force usage of support annotations in the test app, since it is internally used by the runner module.
  androidTestCompile 'com.android.support:support-annotations:23.1.0'
  androidTestCompile 'com.android.support.test:runner:0.4.1'
  androidTestCompile 'com.android.support.test:rules:0.4.1'
  androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
  androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2.1'
  androidTestCompile 'com.android.support.test.espresso:espresso-web:2.2.1'

Another solution is to use this in the top level file:

configurations.all {
    resolutionStrategy.force 'com.android.support:support-annotations:23.1.0'
}