Cannot resolve symbol 'AppCompatActivity'

1、Cannot resolve symbol 'AppCompatActivity'

依赖时依赖库不对

 

implementation 'com.android.support:appcompat-v7:28.0.0'

 

implementation 'androidx.appcompat:appcompat:1.6.1.0'
implementation 'androidx.core:core:1.9.0'

 

implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core:1.2.0'
implementation 'com.android.support:support-compat:28.0.0'

 

2、gradle的阿里地址：

maven { url 'https://maven.aliyun.com/repository/public' }
maven { url 'https://maven.aliyun.com/repository/central' }
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/public' }
maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }