Android studio E/AndroidRuntime:致命异常：主应用程序继续停止？安卓工作室

尝试测试我的横幅添加时出现此错误： E/AndroidRuntime:致命异常：主 进程：com.example.myapplication，PID:6613 java.lang.RuntimeException:无法获取提供程序com.google.android.gms.ads.mobileadsini提供程序：java.lang.IllegalStateException:

******************************************************************************
* Invalid application ID. Follow instructions here:                          *
* https://googlemobileadssdk.page.link/admob-android-update-manifest         *
* to find your app ID.                                                       *
******************************************************************************


    at android.app.ActivityThread.installProvider(ActivityThread.java:7244)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:6780)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6697)
    at android.app.ActivityThread.access$1300(ActivityThread.java:237)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:223)
    at android.app.ActivityThread.main(ActivityThread.java:7656)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
 Caused by: java.lang.IllegalStateException: 

******************************************************************************
* Invalid application ID. Follow instructions here:                          *
* https://googlemobileadssdk.page.link/admob-android-update-manifest         *
* to find your app ID.                                                       *
******************************************************************************


    at com.google.android.gms.internal.ads.zzzj.attachInfo(com.google.android.gms:play-services-ads-lite@@19.5.0:24)
    at com.google.android.gms.ads.MobileAdsInitProvider.attachInfo(com.google.android.gms:play-services-ads-lite@@19.5.0:3)
    at android.app.ActivityThread.installProvider(ActivityThread.java:7239)
        ... 10 more

这是我的密码： Dashboard.java：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dashboard);
        /*MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {

            }
        } */
        AdView adView = new AdView(this);

        adView.setAdSize(AdSize.BANNER);

        adView.setAdUnitId("ca-app-pub-3940256099942544/6300978111");

我在舱单上加了这个

<meta-data
                android:name="com.google.android.gms.ads.APPLICATION_ID"
                android:value="ca-app-pub-3940256099942544~3347511713"/>

在布局中，我有：

<com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="16dp"
        app:adSize="Banner"
        ads:adUnitId="ca-app-pub-3940256099942544/6300978111"
        app:layout_constraintBottom_toTopOf="@+id/img"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />