java - How to obfuscate Admob Unit IDs in String?

Question

I want to hide my Admob unit ids. I use proguard but the strings file is not hidden. I can solve this with a simple program and see its content. What can I do about it?

<string name="banner_top">ca-app-pub-3940256099942544/6300978111</string>
<string name="banner_bottom">ca-app-pub-3940256099942544/6300978111</string>

My code:

<com.google.android.gms.ads.AdView xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:id="@+id/top_banner"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_gravity="bottom|center"
    android:layout_marginTop="4dp"
    android:background="@color/white"
    ads:adSize="BANNER"
    ads:adUnitId="@string/banner_top" />

question from:https://stackoverflow.com/questions/65898296/how-to-obfuscate-admob-unit-ids-in-string

Answer 1

There is an Obfuscapk tool. It has different obfuscation options. For your specific case ResStringEncryption should be fine. You have to use strings in your source code to use this option. (even if you don't need to, just make a dummy use of those strings)