Google signin integration on android

Introduction#

This topic is based on How to integrate google sign-in, On android apps

Integration of google Auth in your project. (Get a configuration file)

First get the Configuration File for Sign-in from

Open link below

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

click on get A configuration file

• Enter App name And package name and click on choose and configure services
• provide SHA1 Enable google SIGNIN and generate configuration files

Download the configuration file and place the file in app/ folder of your project

1. Add the dependency to your project-level build.gradle:

classpath ‘com.google.gms:google-services:3.0.0’

2. Add the plugin to your app-level build.gradle:(bottom)

apply plugin: ‘com.google.gms.google-services’

3. add this dependency to your app gradle file

dependencies { compile ‘com.google.android.gms:play-services-auth:9.8.0’ }

Code Implementation Google SignIn

• In your sign-in activity’s onCreate method, configure Google Sign-In to request the user data required by your app.

  GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestEmail() .build();

• create a GoogleApiClient object with access to the Google Sign-In API and the options you specified.

  mGoogleApiClient = new GoogleApiClient.Builder(this) .enableAutoManage(this /* FragmentActivity /, this / OnConnectionFailedListener */) .addApi(Auth.GOOGLE_SIGN_IN_API, gso) .build();

• Now When User click on Google signin button call this Function.

   private void signIn() {
   Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
   startActivityForResult(signInIntent, RC_SIGN_IN);
  }

• implement OnActivityResult to get the response.

  @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data);

   // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
   if (requestCode == RC_SIGN_IN) {
       GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
       handleSignInResult(result);
   }

  }

• Last step Handle The Result and get User Data

   private void handleSignInResult(GoogleSignInResult result) {
   Log.d(TAG, "handleSignInResult:" + result.isSuccess());
   if (result.isSuccess()) {
       // Signed in successfully, show authenticated UI.
       GoogleSignInAccount acct = result.getSignInAccount();
       mStatusTextView.setText(getString(R.string.signed_in_fmt, acct.getDisplayName()));
       updateUI(true);
   } else {
       // Signed out, show unauthenticated UI.
       updateUI(false);
   }
  }