Android studio v2.2.2 error(27,17) failed to resolve junit:junit4.12

1. (27,17) Failed to resolve: junit:junit:4.12
2. Failed to resolve: javax.inject:javax.inject:1
3. Failed to resolve: javax.annotation:javax.annotation-api:1.2
4. Failed to resolve: com.google.code.findbugs:jsr305:2.0.1
5. Failed to resolve: org.hamcrest:hamcrest-library:1.3
6. Failed to resolve: org.hamcrest:hamcrest-integration:1.3
7. Failed to resolve: com.squareup:javawriter:2.1.1 

遇到此问题需要是因为依赖的问题，需要删除代码中的依赖关系：

需要在MyApplication/app/build.gradle文件中删除未知依赖库：

compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
  exclude group: 'com.android.support', module: 'support-annotations'
})
testCompile 'junit:junit:4.12'testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

down vote

11 down vote accepted

Remove the unwanted libraries from the build.gradle,

compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
  exclude group: 'com.android.support', module: 'support-annotations'
})
testCompile 'junit:junit:4.12'

and also

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"