自动从admob测试广告id更改为正确的横幅广告id生成签名的apk

<resources>
    <!-- AdMob Test Ad Unit ID -->
    <string name="admob_test_banner_id">ca-app-pub-3940256099942544/6300978111</string>
    <!-- AdMob Real Ad Unit ID -->
    <string name="admob_real_banner_id">ca-app-pub-xxxxxxxxxxxxxxxx/yyyyyyyyyy</string>
</resources>

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;

public class MainActivity extends AppCompatActivity {
    private AdView mAdView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        MobileAds.initialize(this, initializationStatus -> {});

        mAdView = findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        ads:adSize="BANNER"
        ads:adUnitId="@string/admob_test_banner_id"/>
</RelativeLayout>

android {
    ...
    buildTypes {
        debug {
            resValue "string", "admob_banner_id", "@string/admob_test_banner_id"
        }
        release {
            resValue "string", "admob_banner_id", "@string/admob_real_banner_id"
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        ads:adSize="BANNER"
        ads:adUnitId="@string/admob_banner_id"/>
</RelativeLayout>

android {
    ...
    signingConfigs {
        release {
            keyAlias 'your-key-alias'
            keyPassword 'your-key-password'
            storeFile file('path/to/your/keystore.jks')
            storePassword 'your-store-password'
        }
    }
    buildTypes {
        release {
            ...
            signingConfig signingConfigs.release
        }
    }
}

./gradlew assembleRelease