Google Map Not Showing Map For Release Apk

I have the problem that has been discussed here but without any solution helps me. The Google map is 'gray' but just in release (when I build generate signed APK). I have tried to

Solution 1:

Are you using ProGuard? If so then you'll need to add following to your ProGuard rules file:

-keep class com.google.android.gms.maps.** { *; }-keep interface com.google.android.gms.maps.** { *; }

Solution 2:

When you generated your Google maps key, did you put SHA-1 of your debug, or of your release certificate? If you put debug SHA-1, add release also.

Also, proper way to do map implementation would be to have debug/res/values/google_maps_api.xml with key for debug and another release/res/values/google_maps_api.xml with key for production. There shouldn't be key in strings.xml. More about this you can read here.