Android Studio 无法导入android.support.v7.app.AppCompatActivity

新建完项目后就报这种错误了，试了好多方法都没用，希望有大神带下

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.test"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

先这一行：implementation 'com.android.support:appcompat-v7:28.0.0'复制com.android.support:appcompat-v7再删除
然后按照我下面图片步骤：
1.
2.
3.
粘贴com.android.support:appcompat-v7搜索
4.
然后再点击ok

Restart 重启一下呢？