In this post, we will build a Signup and Login app using Firebase Auth. Firebase helps to develop high-quality apps and their features work independently. Now let’s see how we can build a signup and login app with Firebase database.
Signup and Login auth
App Demo Screens of Signup and Login screen
Now let’s get started to create a new project
Page Contents
1. Steps for creating new project
- Start Android Studio.
- Create a New Project window that opens.
- Select Phone and Tablet.
- Select Empty Activity.
- Click Next.
- Enter the project name/App name.
- Set the company name as desired. In my case, I am using techpassappmaster.sign_upandlog_inwithfirebase
- Then select the project file location is and change it if desired.
- Select language java.
- Select Minimum SDK Android 4.3.
- Click “Finish.
After the project is successfully created then add your project with Firebase.
Note: – Your Android App and firebase project package name should be the same (mine is com.techpassappmaster.sign_upandlog_inwithfirebase).
2. Enabling Firebase Authentication
Go to your firebase project dashboard. Click the» Authentication » Sign-in method and choose Email & Password and enable it.
3. Add Internet Permission
Open AndroidManifest.xml and add INTERNET permission.
<uses-permission android:name="android.permission.INTERNET" />
4. Add Google Services classpath
Open the build.gradle and add Firebase google services dependency.
dependencies {
classpath 'com.android.tools.build:gradle:4.0.0'
classpath 'com.google.gms:google-services:4.2.0'
}5. Add Firebase auth dependency and Apply Google Services Plugin
Open app/build.gradle and add Firebase authentication dependency. At the very bottom of the file, add apply plugin: ‘com.google.gms.google-services
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.0.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'com.google.android.material:material:1.0.0'
// firebase auth
implementation 'com.google.firebase:firebase-auth:16.0.5'
}
apply plugin: 'com.google.gms.google-services'Now we have added all the required dependencies. Let’s start to make the sign-up screen.
6. Create Signup Screen
- Create an activity named SignupActivity and add the following code to the layout file activity_signup.xml.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:orientation="vertical"
tools:context=".SignUpActivity">
<ProgressBar
android:id="@+id/signUp_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<ImageView
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_marginBottom="22dp"
android:background="@drawable/firebase_logo" />
<TextView
android:id="@+id/login_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="22dp"
android:text="New User Sign Up"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="26sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="20dp">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edit_txt_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:inputType="textWebEmailAddress" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleEnabled="true">
<EditText
android:id="@+id/edit_txt_pass"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleEnabled="true">
<EditText
android:id="@+id/edit_txt_coPass"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Co-Password"
android:inputType="textPassword" />
</com.google.android.material.textfield.TextInputLayout>
<Button
android:id="@+id/button_register"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="22dp"
android:background="#FFC400"
android:text="Sign Up"
android:textAllCaps="false"
android:textColor="#fff"
android:textSize="18sp" />
<TextView
android:id="@+id/text_view_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Already have an account.\nLogin Here"
android:textAlignment="center"
android:textColor="@android:color/holo_green_dark"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>- Open SignupActivity.java and add the following code. Firebase provide the createUserWithEmailAndPassword() method for the user authentication.
package com.techpassappmaster.sign_upandlog_inwithfirebase;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
/**
* Created by Techpass Master on 26-Jun-20.
* www.techpassmaster.com
*/
public class SignUpActivity extends AppCompatActivity {
// private static final Pattern PASSWORD_PATTERN = Pattern.compile("^" + "(?=.*[0-9])" + "(?=.*[a-z])" + "(?=.*[A-Z])" + "(?=.*[a-zA-Z])" + "(?=.*[@#$%^&+=])" + "(?=\\S+$)" + ".{4,}" + "$");
private EditText txtemail, txtpass, txtcopass;
private Button button_register;
private TextView text_view_login;
private FirebaseAuth mAuth;
ProgressBar signUp_progress;
String password, co_password, email;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup);
// get all view id from XML
txtemail = findViewById(R.id.edit_txt_email);
txtpass = findViewById(R.id.edit_txt_pass);
txtcopass = findViewById(R.id.edit_txt_coPass);
signUp_progress = findViewById(R.id.signUp_progress);
text_view_login = findViewById(R.id.text_view_login);
button_register = findViewById(R.id.button_register);
// Get Firebase auth instance
mAuth = FirebaseAuth.getInstance();
text_view_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
startActivity(intent);
}
});
// handle user SignUp button
button_register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!validateEmail() | !validatePassword())
{
return;
}
if (password.equals(co_password)) {
// progressbar VISIBLE
signUp_progress.setVisibility(View.VISIBLE);
mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// progressbar GONE
signUp_progress.setVisibility(View.GONE);
Toast.makeText(SignUpActivity.this, "Successful Registered", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(SignUpActivity.this, MainActivity.class);
startActivity(intent);
finish();
} else {
// progressbar GONE
signUp_progress.setVisibility(View.GONE);
Toast.makeText(SignUpActivity.this, "Check Email id or Password", Toast.LENGTH_SHORT).show();
}
}
});
} else {
Toast.makeText(SignUpActivity.this, "Password didn't match", Toast.LENGTH_SHORT).show();
}
}
});
}
private boolean validateEmail() {
email = txtemail.getText().toString().trim();
if (TextUtils.isEmpty(email)) {
Toast.makeText(SignUpActivity.this, "Enter Your Email", Toast.LENGTH_SHORT).show();
return false;
} else if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
Toast.makeText(SignUpActivity.this, "Please enter valid Email", Toast.LENGTH_SHORT).show();
return false;
} else {
return true;
}
}
private boolean validatePassword() {
password = txtpass.getText().toString().trim();
co_password = txtcopass.getText().toString().toLowerCase();
if (TextUtils.isEmpty(password)) {
Toast.makeText(SignUpActivity.this, "Enter Your Password", Toast.LENGTH_SHORT).show();
return false;
} else if (TextUtils.isEmpty(co_password)) {
Toast.makeText(SignUpActivity.this, "Enter Your Co-Password", Toast.LENGTH_SHORT).show();
return false;
} else if (password.length() <= 6) {
Toast.makeText(SignUpActivity.this, "Password is Very Short", Toast.LENGTH_SHORT).show();
return false;
} else {
return true;
}
}
// if the user already logged in then it will automatically send on dashboard activity.
@Override
public void onStart() {
super.onStart();
if (FirebaseAuth.getInstance().getCurrentUser() != null) {
Intent intent = new Intent(SignUpActivity.this, MainActivity.class);
startActivity(intent);
}
}
}- Now, launch Signup screen. and click to run button and test the signup with email and password.
- After the signup screen launched, enter the email id and password, if you successfully login to Firebase you can see the user-created with the email id in the below image which you gave in the app.
7. Create Login Screen with Email & Password
- Create LoginActivity and add the below code to its layout file activity_login.xml.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:orientation="vertical"
tools:context=".LoginActivity">
<ProgressBar
android:id="@+id/login_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<ImageView
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_marginBottom="22dp"
android:background="@drawable/firebase_logo" />
<TextView
android:id="@+id/login_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="22dp"
android:text="Login Account"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="26sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="20dp">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edit_txt_login_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:inputType="textWebEmailAddress" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleEnabled="true">
<EditText
android:id="@+id/edit_txt_login_pass"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword" />
</com.google.android.material.textfield.TextInputLayout>
<TextView
android:id="@+id/text_view_forget_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:paddingTop="8dp"
android:text="Forgot Password ?"
android:textColor="#651FFF"
android:textSize="16sp" />
<Button
android:id="@+id/button_login"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="22dp"
android:background="#FFC400"
android:text="Login"
android:textAllCaps="false"
android:textColor="#fff"
android:textSize="18sp" />
<TextView
android:id="@+id/text_view_signup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Don't have an account.\nSign Up Here"
android:textAlignment="center"
android:textColor="@android:color/holo_green_dark"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>- Open LoginActivity.java and add the below code. Firebase gives signInWithEmailAndPassword()method to sign in the user.
package com.techpassappmaster.sign_upandlog_inwithfirebase;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
/**
* Created by Techpass Master on 26-Jun-20.
* www.techpassmaster.com
*/
public class LoginActivity extends AppCompatActivity {
private EditText txtemail, txtpassoword;
private Button login_btn;
private TextView text_view_signup, forgot_password;
ProgressBar login_progress;
FirebaseAuth mAuth;
String loginemail, loginpassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// get all view id from XML
txtemail = findViewById(R.id.edit_txt_login_email);
txtpassoword = findViewById(R.id.edit_txt_login_pass);
forgot_password = findViewById(R.id.text_view_forget_password);
login_progress = findViewById(R.id.login_progress);
text_view_signup = findViewById(R.id.text_view_signup);
login_btn = findViewById(R.id.button_login);
// Get Firebase auth instance
mAuth = FirebaseAuth.getInstance();
// handle login button
login_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!validateEmail() | !validatePassword()) {
return;
}
// progressbar VISIBLE
login_progress.setVisibility(View.VISIBLE);
mAuth.signInWithEmailAndPassword(loginemail, loginpassword).
addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
// progressbar GONE
login_progress.setVisibility(View.GONE);
if (task.isSuccessful()) {
Toast.makeText(LoginActivity.this, "Login Successful", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
finish();
} else {
// progressbar GONE
login_progress.setVisibility(View.GONE);
Toast.makeText(LoginActivity.this, "Login Failed", Toast.LENGTH_SHORT).show();
}
}
});
}
});
// handle forgot button
forgot_password.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), ForgotPasswordActivity.class);
startActivity(intent);
}
});
// handle signUp textview
text_view_signup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), SignUpActivity.class);
startActivity(intent);
}
});
}
private boolean validateEmail() {
loginemail = txtemail.getText().toString().trim();
if (TextUtils.isEmpty(loginemail)) {
Toast.makeText(LoginActivity.this, "Enter Your Email", Toast.LENGTH_SHORT).show();
return false;
} else if (!Patterns.EMAIL_ADDRESS.matcher(loginemail).matches()) {
Toast.makeText(LoginActivity.this, "Please enter valid Email", Toast.LENGTH_SHORT).show();
return false;
} else {
return true;
}
}
private boolean validatePassword() {
loginpassword = txtpassoword.getText().toString().trim();
if (TextUtils.isEmpty(loginpassword)) {
Toast.makeText(LoginActivity.this, "Enter Your Password", Toast.LENGTH_SHORT).show();
return false;
} else {
return true;
}
}
}- New, launch LoginActivity.java. Run the project and login with the credentials that you want to use while signing up.
8. Create Forgot Password Screen
Send Reset Password Link on the Email:
Firebase provides the feature to reset the password. When you forget your auth password then you have a need to your auth email because Firebase sends a reset password URL link on your email account. So let’s see the code of it.
- Create another activity named ForgotPasswordActivity.java and add the below code its layout file activity_forgot_password.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:orientation="vertical"
tools:context=".ForgotPasswordActivity">
<ProgressBar
android:id="@+id/resetPassword_progress"
android:layout_width="wrap_content"
android:visibility="gone"
android:layout_height="wrap_content"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="140dp"
android:layout_marginBottom="22dp"
android:background="@drawable/firebase_logo" />
<TextView
android:id="@+id/login_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Reset Password ?"
android:textAlignment="center"
android:layout_marginBottom="22dp"
android:textColor="@android:color/black"
android:textSize="26sp"
android:textStyle="bold" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Enter your email to received reset link"
android:textAlignment="center"
android:layout_marginBottom="22dp"
android:textColor="@android:color/black"
android:textSize="20sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:orientation="vertical">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edit_txt_resetEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:inputType="textWebEmailAddress" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleEnabled="true"/>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:passwordToggleEnabled="true"/>
<Button
android:id="@+id/button_resetPassword"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="22dp"
android:background="#FFC400"
android:text="Send Me Link"
android:textAllCaps="false"
android:textColor="#fff"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>- Open ForgotPasswordActivity.java. You can use the sendPasswordResetEmail() method to send the password reset URL link on your email, follow the below code.
package com.techpassappmaster.sign_upandlog_inwithfirebase;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
/**
* Created by Techpass Master on 26-Jun-20.
* www.techpassmaster.com
*/
public class ForgotPasswordActivity extends AppCompatActivity {
private EditText edit_txt_resetEmail;
private Button button_resetPassword;
private ProgressBar resetPassword_progress;
FirebaseAuth firebaseAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_forgot_password);
// get all view id from XML
edit_txt_resetEmail = findViewById(R.id.edit_txt_resetEmail);
button_resetPassword = findViewById(R.id.button_resetPassword);
resetPassword_progress = findViewById(R.id.resetPassword_progress);
// Get Firebase auth instance
firebaseAuth = FirebaseAuth.getInstance();
button_resetPassword.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
resetPassword_progress.setVisibility(View.VISIBLE);
firebaseAuth.sendPasswordResetEmail(edit_txt_resetEmail.getText().toString())
.addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
resetPassword_progress.setVisibility(View.GONE);
if (task.isSuccessful()) {
Toast.makeText(ForgotPasswordActivity.this, "Password reset link sent to your Email", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(ForgotPasswordActivity.this, LoginActivity.class);
startActivity(intent);
finish();
} else {
Toast.makeText(ForgotPasswordActivity.this, "Something error", Toast.LENGTH_SHORT).show();
}
}
});
}
});
}
}- Now, launch ForgotPasswordActivity. Run and test the reset password.
This is your reset password URL. Click to change the new password.
9. Create Logout Screen
- After the successful login, the user will be switch to the dashboard or main activity, for that create a new activity named MainActivity.
- Add the below code its layout file activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
android:orientation="vertical"
android:padding="16sp"
tools:context=".MainActivity">
<TextView
android:id="@+id/txt_userEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="User Email"
android:textAlignment="center"
android:textColor="#02C164"
android:textSize="26sp"
android:textStyle="bold" />
<Button
android:id="@+id/btn_userlogout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="100dp"
android:background="#651FFF"
android:text="Logout"
android:textColor="#ffff"
android:textSize="18sp"
android:textStyle="bold" />
</LinearLayout>- Open MainActivity.java. You can use the signOut() method for the logout credentials user account and add the following code to MainActivity.java.
package com.techpassappmaster.sign_upandlog_inwithfirebase;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
/**
* Created by Techpass Master on 26-Jun-20.
* www.techpassmaster.com
*/
public class MainActivity extends AppCompatActivity {
private TextView txt_userEmail;
private Button btn_userlogout;
FirebaseUser firebaseUser;
FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get all view id from XML
txt_userEmail = findViewById(R.id.txt_userEmail);
btn_userlogout = findViewById(R.id.btn_userlogout);
// Get Firebase auth instance
mAuth = FirebaseAuth.getInstance();
firebaseUser = mAuth.getCurrentUser();
txt_userEmail.setText(firebaseUser.getEmail());
// handle Logout button
btn_userlogout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mAuth.signOut();
Toast.makeText(MainActivity.this, "Logout Successful ", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
}
});
}
@Override
public void onBackPressed() {
super.onBackPressed();
finishAffinity();
}
}10. Click Run button and test the Logout.
Read More:
- Android Working With Firebase – Signup And Login Auth.
- Getting Started With Firebase On Android.
- Android Interview Questions For Fresher 2021.
- Top 5 Things To Avoid While Developing Android Apps.
Congrats! You’ve now completed your signup and login app with Firebase. Check the demo app link given below.
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