答案 0 :(得分:3)
将gradle设置更改为以下->
compileSdkVersion 28
targetSdkVersion 28
将依赖项更改如下->
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
implementation 'com.android.support:support-v4:28.0.0-alpha1'
implementation 'com.android.support:design:28.0.0-alpha1'
implementation 'com.android.support:recyclerview-v7:28.0.0-alpha1'