Error:Conflict with dependency 'com.google.code.findbugs:jsr305'

Question

In your app's build.gradle add the following:

android {
    configurations.all {
        resolutionStrategy.force 'com.google.code.findbugs:jsr305:1.3.9'
    }
}

Enforces Gradle to only compile the version number you state for all dependencies, no matter which version number the dependencies have stated.

This is due to espresso. You can add the following to your apps build.grade to mitigate this.

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2') {
  exclude group: 'com.google.code.findbugs'
}

METHOD 1: I deleted the androidTestCompile on espresso-core line which was automatically included in a new project. Then my Android Studio compiles clean.

The androidTestCompile is in "build.gradle (Module:app)":

dependencies {
    ...
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    ...
}

I don't know whether this deletion will have any problem down the road, but it surely works for my current project now.

METHOD 2: Adding an exclude on findbugs works too:

dependencies {
    ...
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
        exclude group: 'com.google.code.findbugs'
    })
    ...
}

METHOD 3: Forcing compiling with a specific version:

(In the following I force it to compile with the higher version.)

dependencies {
    ...
    androidTestCompile 'com.google.code.findbugs:jsr305:3.0.0'
    ...
}

From Gradle Plugin User Guide:

When instrumentation tests are run, both the main APK and test APK share the same classpath. Gradle build will fail if the main APK and the test APK use the same library (e.g. Guava) but in different versions. If gradle didn't catch that, your app could behave differently during tests and during normal run (including crashing in one of the cases).

To make the build succeed, just make sure both APKs use the same version. If the error is about an indirect dependency (a library you didn't mention in your build.gradle), just add a dependency for the newer version to the configuration

Add this line to your build.gradle dependencies to use newer version for both APKs:

compile('com.google.code.findbugs:jsr305:2.0.1')

For future reference, you can check your Gradle Console and it will provide a helpful link next to the error to help with any gradle build errors.