这篇文章上次修改于 2363 天前，可能其部分内容已经发生变化，如有疑问可询问作者。

报错文件 build.gradle

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')
}

由于Gradle升级，instrumentTest已被弃用，将instrumentTest.setRoot('tests')修改为androidTest.setRoot('tests') 。stackoverflow