Login With Google in Android Studio

Main Activity.java

package com.tikarye.testlogingoogleplus;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.auth.api.signin.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;


public class MainActivity extends AppCompatActivity implements View.OnClickListener, OnConnectionFailedListener {
    //Signin button
    private SignInButton signInButton;

    //Signing Options
    private GoogleSignInOptions gso;

    //google api client
    private GoogleApiClient mGoogleApiClient;

    //Signin constant to check the activity result
    private int RC_SIGN_IN = 100;

    //TextViews
    private TextView textViewName;
    private TextView textViewEmail;
    private NetworkImageView profilePhoto;

    //Image Loader
    private ImageLoader imageLoader;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Initializing Views
        textViewName = (TextView) findViewById(R.id.textViewName);
        textViewEmail = (TextView) findViewById(R.id.textViewEmail);
        profilePhoto = (NetworkImageView) findViewById(R.id.profileImage);

        //Initializing google signin option
        gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestEmail()
                .build();

        //Initializing signinbutton
        signInButton = (SignInButton) findViewById(R.id.sign_in_button);
        signInButton.setSize(SignInButton.SIZE_WIDE);
        signInButton.setScopes(gso.getScopeArray());

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


        //Setting onclick listener to signing button
        signInButton.setOnClickListener(this);
    }

    //This function will option signing intent
    private void signIn() {
        //Creating an intent
        Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);

        //Starting intent for result
        startActivityForResult(signInIntent, RC_SIGN_IN);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //If signin
        if (requestCode == RC_SIGN_IN) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            //Calling a new function to handle signin
            handleSignInResult(result);
        }
    }

    //After the signing we are calling this function
    private void handleSignInResult(GoogleSignInResult result) {
        //If the login succeed
        if (result.isSuccess()) {
            //Getting google account
            GoogleSignInAccount acct = result.getSignInAccount();

            //Displaying name and email
            textViewName.setText(acct.getDisplayName());
            textViewEmail.setText(acct.getEmail());

            //Initializing image loader
            imageLoader = CustomVolleyRequest.getInstance(this.getApplicationContext())
                    .getImageLoader();

            imageLoader.get(acct.getPhotoUrl().toString(),
                    ImageLoader.getImageListener(profilePhoto,
                            R.mipmap.ic_launcher,
                            R.mipmap.ic_launcher));

            //Loading image
            profilePhoto.setImageUrl(acct.getPhotoUrl().toString(), imageLoader);

        } else {
            //If login fails
            Toast.makeText(this, "Login Failed", Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onClick(View view) {
        if (view == signInButton) {
            //Calling signin
            signIn();
        }
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {

    }
}

set permission in AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />

build.gradle(Module:app)

apply plugin: 'com.android.application'

apply plugin: 'com.google.gms.google-services'



android {

    compileSdkVersion 23

    buildToolsVersion "23.0.2"



    defaultConfig {

        applicationId "com.tikarye.testlogingoogleplus"

        minSdkVersion 11

        targetSdkVersion 23

        versionCode 1

        versionName "1.0"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    testCompile 'junit:junit:4.12'

    compile 'com.android.support:appcompat-v7:23.1.1'

    compile 'com.google.android.gms:play-services-auth:8.3.0'

    compile 'com.mcxiaoke.volley:library-aar:1.0.0'

   }

 Final Output








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