Facebook and Google Login integration Using Firebase

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Firebase is a platform for all Android,Ios and Web Applications.provides automatic data synchronization, authentication services, messaging, file storage, analytics, and more.Today,i write this post how to SignUp with Facebook and Google using firebase concept in detail.

Facebook Integration Part:

Before going to this approach you must have an Facebook developer account,In case you have no account click to this link: https://developers.facebook.com/apps/

1.Create project write your project Name.It's easy to fill all the specified fields but one main point here mentioned i.e SHA1 key generation.

To generate this key you must download the Openssl.

1.C:\Program Files\Java\jdk1.8.0_121\bin\keytool.exe
   
   It is path for JDK key tool.exe

2.C:\Users\Admin\Downloads\openssl-0.9.8k_X64\bin\openssl.exe
   
   It is path for openssl

Key Tool Generation Process:

Run Your command prompt by this command.

keytool -exportcert -alias androiddebugkey -keystore "C:\Users\USERNAME\.android\debug.keystore" | "C:\Users\Admin\Downloads\openssl-0.9.8k_X64\bin\openssl.exe" sha1 -binary | "C:\Users\Admin\Downloads\openssl-0.9.8k_X64\bin\openssl.exe" base64






After do this Steps go to Firebase console for setup Facebook Login roles and google roles.This is link for firebase :https://console.firebase.google.com

1.Create Project as below way.Once click one Add project it will show another screen below...




After done this step Select the option Android Apps then process the project profile as below screen


After complete above steps finally You will appear the below screen.In this you have Sign Up Methods like Facebook,email,google bla..bla...

Now we go for coding part ....

LoginActivity.Java

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.view.View;
import android.view.View.OnClickListener;

import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
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.GoogleSignInResult;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FacebookAuthProvider;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.auth.GoogleAuthProvider;
import com.google.firebase.iid.FirebaseInstanceId;
import com.toss.socialposts.Constants;
import com.toss.socialposts.HomeActivity;
import com.toss.socialposts.R;
import com.toss.socialposts.managers.DatabaseHelper;
import com.toss.socialposts.managers.ProfileManager;
import com.toss.socialposts.managers.listeners.OnObjectExistListener;
import com.toss.socialposts.model.Profile;
import com.toss.socialposts.utils.GoogleApiHelper;
import com.toss.socialposts.utils.LogUtil;
import com.toss.socialposts.utils.LogoutHelper;
import com.toss.socialposts.utils.PreferencesUtil;

import java.util.Arrays;

public class LoginActivity extends BaseActivity implements GoogleApiClient.OnConnectionFailedListener {
    private static final String TAG = LoginActivity.class.getSimpleName();
    private static final int SIGN_IN_GOOGLE = 9001;

    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;
    private GoogleApiClient mGoogleApiClient;

    private CallbackManager mCallbackManager;
    private String profilePhotoUrlLarge;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_login);
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
        mGoogleApiClient = GoogleApiHelper.createGoogleApiClient(this);
        findViewById(R.id.googleSignInButton).setOnClickListener(new OnClickListener() {
            @Override            public void onClick(View view) {
                signInWithGoogle();
            }
        });

        mAuth = FirebaseAuth.getInstance();

        if (mAuth.getCurrentUser() != null) {
          
        }

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                final FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) {
                    checkIsProfileExist(user.getUid());
                } else {
                   
                }
            }
        };
        mCallbackManager = CallbackManager.Factory.create();
        LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
            @Override            public void onSuccess(LoginResult loginResult) {
                LogUtil.logDebug(TAG, "facebook:onSuccess:" + loginResult);
                profilePhotoUrlLarge = String.format(getString(R.string.facebook_large_image_url_pattern),
                        loginResult.getAccessToken().getUserId());
                handleFacebookAccessToken(loginResult.getAccessToken());
            }

            @Override            public void onCancel() {
                LogUtil.logDebug(TAG, "facebook:onCancel");
            }

            @Override            public void onError(FacebookException error) {
                LogUtil.logError(TAG, "facebook:onError", error);
                showSnackBar(error.getMessage());
            }
        });

        findViewById(R.id.facebookSignInButton).setOnClickListener(new OnClickListener() {
            @Override            public void onClick(View v) {
                signInWithFacebook();
            }
        });
    }

    @Override    public void onStart() {
        super.onStart();
        mAuth.addAuthStateListener(mAuthListener);

        if (mGoogleApiClient != null) {
            mGoogleApiClient.connect();
        }
    }

    @Override    public void onStop() {
        super.onStop();
        if (mAuthListener != null) {
            mAuth.removeAuthStateListener(mAuthListener);
        }

        if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
            mGoogleApiClient.stopAutoManage(this);
            mGoogleApiClient.disconnect();
        }
    }

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

        mCallbackManager.onActivityResult(requestCode, resultCode, data);
        if (requestCode == SIGN_IN_GOOGLE) {
            GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            if (result.isSuccess()) {
                showProgress();
                GoogleSignInAccount account = result.getSignInAccount();
                profilePhotoUrlLarge = String.format(getString(R.string.google_large_image_url_pattern),
                        account.getPhotoUrl(), Constants.Profile.MAX_AVATAR_SIZE);
                firebaseAuthWithGoogle(account);
            } else {
                hideProgress();
            }
        }
    }

    private void checkIsProfileExist(final String userId) {
        ProfileManager.getInstance(this).isProfileExist(userId, new OnObjectExistListener<Profile>() {
            @Override            public void onDataChanged(boolean exist) {
                if (!exist) {
                    startCreateProfileActivity();
                } else {
                    PreferencesUtil.setProfileCreated(LoginActivity.this, true);
                    DatabaseHelper.getInstance(LoginActivity.this.getApplicationContext())
                            .addRegistrationToken(FirebaseInstanceId.getInstance().getToken(), userId);
                }
                hideProgress();
                finish();
            }
        });
    }

    private void startCreateProfileActivity() {
        Intent intent = new Intent(LoginActivity.this, NextActivty.class);
        intent.putExtra(CreateProfileActivity.LARGE_IMAGE_URL_EXTRA_KEY, profilePhotoUrlLarge);
        startActivity(intent);
    }

    private void handleFacebookAccessToken(AccessToken token) {
        showProgress();

        AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override                    public void onComplete(@NonNull Task<AuthResult> task) {
                        Intent tas=new Intent(getApplicationContext(),NextActivity.class);
                        startActivity(tas);
                        finish();

                        if (!task.isSuccessful()) {
                            handleAuthError(task);
                        }
                    }
                });
    }

    private void handleAuthError(Task<AuthResult> task) {
        Exception exception = task.getException();
        if (exception != null) {
            showWarningDialog(exception.getMessage());
        } else {
            showSnackBar(R.string.error_authentication);
        }

        hideProgress();
    }

    private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
        LogUtil.logDebug(TAG, "firebaseAuthWithGoogle:" + acct.getId());
        showProgress();

        AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override                    public void onComplete(@NonNull Task<AuthResult> task) {
                        Intent tas=new Intent(getApplicationContext(),HomeActivity.class);
                        startActivity(tas);
                        finish();
                        if (!task.isSuccessful()) {
                            handleAuthError(task);
                        }
                    }
                });
    }

    @Override    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
        showSnackBar(R.string.error_google_play_services);
        hideProgress();
    }

    private void signInWithGoogle() {
        if (hasInternetConnection()) {
            Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
            startActivityForResult(signInIntent, SIGN_IN_GOOGLE);
        } else {
            showSnackBar(R.string.internet_connection_failed);
        }
    }

    private void signInWithFacebook() {
        if (hasInternetConnection()) {
            LoginManager.getInstance().logInWithReadPermissions(LoginActivity.this, Arrays.asList("email", "public_profile"));
        } else {
            showSnackBar(R.string.internet_connection_failed);
        }
    }
}


activity_login.xml:




<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:id="@+id/buttonsContainer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginBottom="@dimen/login_screen_content_offset_center_top"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/login_screen_title_margin"
            android:text="@string/app_name"
            style="@style/TextAppearance.MainTitle" />

        <RelativeLayout
            android:id="@+id/facebookSignInButton"
            android:layout_width="@dimen/base_login_button_width"
            android:layout_height="@dimen/base_login_button_height"
            android:layout_gravity="center_horizontal"
            android:layout_margin="5dp"
            android:background="@drawable/facebook_button_bg"
            android:elevation="4dp">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:paddingLeft="@dimen/large_intrinsic_padding"
                android:paddingRight="@dimen/large_intrinsic_padding"
                app:srcCompat="@drawable/ic_bt_login_facebook" />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:text="@string/button_login_with_facebook"
                android:textColor="@drawable/login_button_text_selector" />
        </RelativeLayout>
        <RelativeLayout
            android:id="@+id/googleSignInButton"
            android:layout_width="@dimen/base_login_button_width"
            android:layout_height="@dimen/base_login_button_height"
            android:layout_gravity="center_horizontal"
            android:layout_marginBottom="@dimen/login_screen_button_margin"
            android:background="@drawable/google_button_bg"
            android:elevation="4dp">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_centerVertical="true"
                android:paddingLeft="@dimen/large_intrinsic_padding"
                android:paddingRight="@dimen/large_intrinsic_padding"
                app:srcCompat="@drawable/ic_bt_login_google" />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:text="@string/button_login_with_google"
                android:textColor="@drawable/login_button_text_selector" />
        </RelativeLayout>
    </LinearLayout>
</FrameLayout>






























































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