AS升级3.1 编译报错：The SourceSet 'instrumentTest' is not recognized by the Android Gradle Plugin.

AndroidStudio升级到3.1后编译报错：The SourceSet ‘instrumentTest’ is not recognized by the Android Gradle Plugin.

项目中 gradle 配置

sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
resources.srcDirs = ['src']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
assets.srcDirs = ['assets']
jniLibs.srcDirs = ['libs']
}
// Move the tests to tests/java, tests/res, etc...
instrumentTest.setRoot('tests')
// Move the build types to build-types/<type>
// For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
// This moves them out of them default location under src/<type>/... which would
// conflict with src/ being used by the main source set.
// Adding new build types or product flavors should be accompanied
// by a similar customization.
debug.setRoot('build-types/debug')
release.setRoot('build-types/release')
}

原因

是这里出问题了 instrumentTest.setRoot(‘tests’) ，你可能在升级 Android Studio 时更新了项目的 gradle 配置，这里的配置中 instrumentTest 已被弃用，不适用于现在的 gradle 版本。

解决办法

用 androidTest 替换 instrumentTest，编译运行即可。