Error:Execution failed for task

Error:Execution failed for task ':binderprocesscommunication:preDebugAndroidTestBuild'.

Conflict with dependency 'com.android.support:support-annotations' in project ':binderprocesscommunication'. 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.

解决办法：在build.gradle 中加入
configurations.all {
resolutionStrategy.force 'com.android.support:support-annotations:27.1.1'
}