AdMob 横幅在启用 ProGuard 时为空白

AdMob banner is blank with ProGuard enabled(AdMob 横幅在启用 ProGuard 时为空白)

问题描述

I've added the AdMob (320x50 banners) to my project and tested it successfully in debug mode. For production builds I have ProGuard obfuscation enabled and banners disappeared. I've tried using these ProGuard rules but it doesn't affect:

-keep public class com.google.android.gms.ads.** {
   public *;
}

-keep public class com.google.ads.** {
   public *;
}

I initialize AdMob in my Application class like:

MobileAds.initialize(getApplicationContext(), getString(R.string.banner_ad_id));

in xml layout I place banner:

<com.google.android.gms.ads.AdView
        xmlns:ads="http://schemas.android.com/apk/res-auto"
        android:id="@+id/adView"
        android:layout_width="match_parent"
        android:visibility="gone"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        ads:adSize="BANNER"
        ads:adUnitId="@string/banner_ad_unit_id">
</com.google.android.gms.ads.AdView>

after, I load a banner this way:

AdView adMobView = (AdView) bannerLayout.findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
adMobView.loadAd(adRequest);

Also, I'm using second ad provider (adtech) and play with their visibility depending on conditions. Any idea how to make them visible?

Finally, I've found where was my problem - I shouldn't had set AdView's initial visibility parameter to GONE. Even through I've changed it programmatically to VISIBLE - it did not work in signed apk (still a mystery).

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