问错误: MainActivity必须扩展android.app.Activity [不可更改]

EN

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.1' // changed from 4.2.2 to 7.0.1
        // ...
    }
}

/builds/locuslabs/android-team/locuslabs-android-sdk/app/src/main/AndroidManifest.xml:21: Error: MainActivity must extend android.app.Activity [Instantiatable]
            android:name="com.locuslabs.appsdk.MainActivity"
                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Explanation for issues of type "Instantiatable":
   Activities, services, broadcast receivers etc. registered in the manifest
   file (or for custom views, in a layout file) must be "instantiatable" by
   the system, which means that the class must be public, it must have an
   empty public constructor, and if it's an inner class, it must be a static
   inner class.
1 errors, 0 warnings
Lint found fatal errors while assembling a release target.
To proceed, either fix the issues identified by lint, or modify your build script as follows:
...
android {
    lintOptions {
        checkReleaseBuilds false
        // Or, if you prefer, you can continue to check for errors in release builds,
        // but continue the build even when errors are found:
        abortOnError false
    }
}

        <activity
            android:name="com.locuslabs.appsdk.MainActivity"
            android:label="@string/app_name"
            android:windowSoftInputMode="adjustNothing">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    // ...
}

android {
    lintOptions {
        disable "Instantiatable"
    }
}

@SdkSuppress("Instantiatable")
class MainActivity : AppCompatActivity() {
   // ...
}