Google-map work on emulator but doesn't on real device

Question

I applied the exact steps as mentioned in the google developer doc to create an example google map project and everything went fine on the emulator, but when I generated the pro

Answer 1

You will get .keystore or .jks file while generating signed APK.In fact using that you have to create the finger print for your application which is later used to generate Android Key in Google developer console.

Now what you have to do is use the command to generate the SHA-1 certificate fingerprint

 keytool -list -v -keystore "path_to_jks_file.jks" -alias androiddebugkey -storepass android -keypass android

In that path_to_jks_file.jks you should give the path of your .jks file that you got when generating signed APK.

And get your android key from google developer console then add it in manifest

And remember to add the signing configuration to your build.gradle

signingConfigs {
        release {
            storeFile file("myreleasekey.jks")
            storePassword "password"
            keyAlias "MyReleaseKey"
            keyPassword "password"
        }
    }

Signing your application

Visit for clarification.

An elaborated explanations Signup and API Keys

AFAIK these information's good enough for resolving your issue.tell me if any further.