018 Could not download espresso-core-3.2.0.aar (androidx.test.espresso:espresso-core:3.2.0) > Could not get resource 'https://dl.google.com/dl/android/maven2/androidx/test/espresso/espresso-core/3.2.0/espresso-core-3.2.0.aar'.
注释掉module下的build.gradle里的 即可：
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'