Google sign in error Status{statusCode=DEVELOPER_ERROR, resolution=null}

Problem was SHA1 mismatch,

1] First Keystore File : I solved the error, problem was while building apk Android studio was taking default keystore file which was located inside C:\Users\<LOGGED_IN_USER_NAME>\.android\debug.keystore

2] Second Keystore File : Also I created one other keystore file which was located at different directory i.e. app/keystore/debug.keystore

While configuring the google developer console to integrate gmail login within app I gave sha-1 key generated through second keystore file above, the studio while building the apk file taking other keystore file hence sha-1 key mismatch was happening.

In order to take my keystore file located @ app/keystore/debug.keystore I configured gradle file at app level with following code :

signingConfigs {
        debug {
            storeFile file('keystore/debug.keystore')
            keyAlias 'androiddebugkey'
            keyPassword 'android'
            storePassword 'android'
        }
        /*
        release {
            storeFile file('release.keystore')
            storePassword "mystorepassword"
            keyAlias "mykeyalias"
            keyPassword "mykeypassword"
        }
        */

Now the generated apk sha-1 signature matches with the sha-1 key configured on google developer console for your app.

One note : Always use debug.keystore for debugging the gmail integration (At the time of development).

Refs :

For gmail integration : https://developers.google.com/identity/sign-in/android/start-integrating

To see which sha-1 is getting used for your application see this stackoverflow thread : SHA-1 fingerprint of keystore certificate

For anyone who is using React Native Google Signin and Firebase, try this.

Step 1: Get the SHA-1 of your Android Developer Debug Keystore

keytool -exportcert -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore

The password is android. Copy the SHA-1 value, which will look something like this in the output:

Certificate Fingerprints
....
SHA1: aa:bb:cc:dd:ee:ff:11:22:33:44:47:D0:9E:8D:E0:0C:79:F1:0F:CB

Step 2: Add the SHA to the Android App in the Firebase Console

Now open up your Android App in the Firebase console and add the SHA-1:

For react native app google login I followed following steps and it worked

• Setup app in firebase console for iOS/Android on the following link https://console.firebase.google.com/
• Download GoogleService-Info.plist for iOS and google-services.json for Android
• Don't forget to set SHA certificate fingerprints SHA1 for android setup. It's mandatory to work with Android.
• Then copy Web client (auto created by Google Service) from OAuth 2.0 client IDs from following URL to access Google developer console https://console.developers.google.com/
• After doing all of these steps in firebase developer console and Google developer console
• move to your code Open your .js file from where you provide an option to login via Google.
• In componentDidMount place following code

GoogleSignin.configure({
      iosClientId: Constants.GOOGLE_LOGIN_CLIENT_ID_IOS,
      webClientId: Constants.GOOGLE_WEB_CLIENT_ID,
      offlineAccess: false
    });

or you can create a separate method like this and call it in componentDidMount to configure GoogleSignIn

 async setupGoogleSignin() {
    try {
      await GoogleSignin.hasPlayServices//({ autoResolve: true });
      await GoogleSignin.configure({
        iosClientId: Constants.GOOGLE_LOGIN_CLIENT_ID_IOS,
        webClientId: Constants.GOOGLE_WEB_CLIENT_ID,
        offlineAccess: true
      });

      const user = await GoogleSignin.currentUserAsync();
      console.log("user from google sin in", user);
    } catch (err) {
      console.log("Google signin error", err.code, err.message);
    }
  }

After configuring GoogleSignIn you can call the following method on the press of GoogleSignInButton

googleAuth() {
    GoogleSignin.signIn()
      .then(user => {
        console.log("user==", user);
        console.log("user name = ", user.user.email);
        console.log("accessTOken = ", user.accessToken);
        this.props.socialMediaLogin( // this is my method that I call on successful  authentication
          user.user.id,
          user.user.name,
          user.user.givenName,
          user.user.familyName,
          user.user.email,
          user.user.photo,
          "GOOGLE",
          user.accessToken
        );
      })
      .catch(err => {
        console.log("WRONG SIGNIN", err);
      })
      .done();
  }