ClassNotFoundException: Didn't find class “com.google.android.gms.ads.AdView”

Question

I did a lot of research and this seems to be a common error for many users but for very different reasons. None of which I found worked for me.

I\'m getting

Answer 1

I did what @user1684030 said (upgraded Android SDK Build Tools; changed compiler to 1.7), but not worked for me. I've written the solution that I found in case it could help anyone with the same problem:

In the step 3 of Setting Up Google Play Services says:

In your app project, reference Google Play services library project. See Referencing a Library Project for Eclipse for more information on how to do this.

Note: You should be referencing a copy of the library that you copied to your development workspace—you should not reference the library directly from the Android SDK directory.

Solution: Don't do the copy manually. Instead just check the box in Eclipse that says "Copy projects into workspace"

I did it so and everything worked again.

Thanks to this StackOverFlow question: How to fix Google Play Services 2 Library install to Eclipse (Admob is part of Google Play Services)

Answer 2

I finally solved my problems by

• installing the newest version of Android SDK Build Tools (didn't realize that I did not have them yet)
• switching from Compiler compliance level 1.6 to 1.7 (Window - Preferences - Java - Compiler - Compiler compliance level)

Thanks at everybody.

Answer 3

This because ProGuard. To safely use ProGuard with Google Mobile Ads, add the following to your ProGuard config:

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

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