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Firebase Auth with Facebook a Android application
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="tech.alvarez.today.LoginActivity">
<com.facebook.login.widget.LoginButton
android:id="@+id/loginButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:paddingBottom="10dp"
android:paddingTop="10dp" />
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:indeterminate="true"
android:visibility="gone" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="tech.alvarez.today.MainActivity">
<TextView
android:id="@+id/nameTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="Nombre"
android:textSize="20sp" />
<TextView
android:id="@+id/emailTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@id/nameTextView"
android:layout_centerHorizontal="true"
android:text="Email"
android:textSize="16sp" />
<TextView
android:id="@+id/uidTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/nameTextView"
android:layout_centerHorizontal="true"
android:text="UID"
android:textSize="14sp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:onClick="logout"
android:text="@string/logout" />
</RelativeLayout>
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.0"
defaultConfig {
applicationId "tech.alvarez.today"
minSdkVersion 15
targetSdkVersion 24
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-v7:24.0.0'
compile 'com.facebook.android:facebook-android-sdk:[4,5)'
compile 'com.google.firebase:firebase-core:9.0.2'
compile 'com.google.firebase:firebase-auth:9.0.2'
}
apply plugin: 'com.google.gms.google-services'
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#4CAF50</color>
<color name="colorPrimaryDark">#388E3C</color>
<color name="colorAccent">#FFD740</color>
</resources>
package tech.alvarez.today;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
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 java.util.Arrays;
public class LoginActivity extends AppCompatActivity {
private LoginButton loginButton;
private CallbackManager callbackManager;
private FirebaseAuth firebaseAuth;
private FirebaseAuth.AuthStateListener firebaseAuthListener;
private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
callbackManager = CallbackManager.Factory.create();
loginButton = (LoginButton) findViewById(R.id.loginButton);
loginButton.setReadPermissions(Arrays.asList("email"));
loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
handleFacebookAccessToken(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Toast.makeText(getApplicationContext(), R.string.cancel_login, Toast.LENGTH_SHORT).show();
}
@Override
public void onError(FacebookException error) {
Toast.makeText(getApplicationContext(), R.string.error_login, Toast.LENGTH_SHORT).show();
}
});
firebaseAuth = FirebaseAuth.getInstance();
firebaseAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
goMainScreen();
}
}
};
}
private void handleFacebookAccessToken(AccessToken accessToken) {
progressBar.setVisibility(View.VISIBLE);
loginButton.setVisibility(View.GONE);
AuthCredential credential = FacebookAuthProvider.getCredential(accessToken.getToken());
firebaseAuth.signInWithCredential(credential).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (!task.isSuccessful()) {
Toast.makeText(getApplicationContext(), R.string.firebase_error_login, Toast.LENGTH_LONG).show();
}
progressBar.setVisibility(View.GONE);
loginButton.setVisibility(View.VISIBLE);
}
});
}
private void goMainScreen() {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onStart() {
super.onStart();
firebaseAuth.addAuthStateListener(firebaseAuthListener);
}
@Override
protected void onStop() {
super.onStop();
firebaseAuth.removeAuthStateListener(firebaseAuthListener);
}
}
package tech.alvarez.today;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import com.facebook.login.LoginManager;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
public class MainActivity extends AppCompatActivity {
private TextView nameTextView;
private TextView emailTextView;
private TextView uidTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nameTextView = (TextView) findViewById(R.id.nameTextView);
emailTextView = (TextView) findViewById(R.id.emailTextView);
uidTextView = (TextView) findViewById(R.id.uidTextView);
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null) {
String name = user.getDisplayName();
String email = user.getEmail();
Uri photoUrl = user.getPhotoUrl();
String uid = user.getUid();
nameTextView.setText(name);
emailTextView.setText(email);
uidTextView.setText(uid);
} else {
goLoginScreen();
}
}
private void goLoginScreen() {
Intent intent = new Intent(this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
public void logout(View view) {
FirebaseAuth.getInstance().signOut();
LoginManager.getInstance().logOut();
goLoginScreen();
}
}
<resources>
<string name="app_name">Today</string>
<string name="facebook_app_id">TU_ID_APP</string>
<string name="welcome">Bienvenido</string>
<string name="cancel_login">Se canceló la operación</string>
<string name="error_login">Ocurrió un error al ingresar</string>
<string name="logout">Cerrar sesión</string>
<string name="firebase_error_login">Error al iniciar sesión en Firebase</string>
</resources>
package tech.alvarez.today;
import android.app.Application;
import com.facebook.FacebookSdk;
import com.facebook.appevents.AppEventsLogger;
/**
* Created by Daniel Alvarez on 29/6/16.
* Copyright © 2016 Alvarez.tech. All rights reserved.
*/
public class TodayApp extends Application {
@Override
public void onCreate() {
super.onCreate();
FacebookSdk.sdkInitialize(getApplicationContext());
AppEventsLogger.activateApp(this);
}
}

Kindly upload the manifest file too

thanks!

Gracias por tu tutorial! 💯

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