How to create a simple user Registration/Sign up app in Android Studio

For the old article, I have a user login app in Android Studio, but for this article, I have a new example I create a simple user registration app with a beautiful screen. it has the screen background, icon, and text editor style.

Android Contents:

So you can follow with me step by step:

1. Create a new android project

For example project, you can find the article How to create a simple user login app in Android Studio

Project name: Simple User Login

Package name: com.eangkor.simpleuserlogin

Langauge: Java

2. In activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:background="@drawable/background"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editTextUsername"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginTop="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_user"

        android:drawablePadding="10dp"
        android:hint="Username"
        android:inputType="textPersonName"
        android:padding="20dp"
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView" />

    <EditText
        android:id="@+id/editTextPassword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_info"
        android:drawablePadding="10dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword"
        android:padding="20dp"

        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextUsername" />

    <Button
        android:id="@+id/btnLogin"
        android:layout_width="118dp"
        android:layout_height="59dp"
        android:layout_marginTop="20dp"
        android:text="LOGIN"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextPassword" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/user_icon" />

    <TextView
        android:id="@+id/tvForget"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="Forgot password?"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.335"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnLogin" />

    <TextView
        android:id="@+id/tvSignup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="Sign Up"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.106"
        app:layout_constraintStart_toEndOf="@+id/tvForget"
        app:layout_constraintTop_toBottomOf="@+id/btnLogin" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:text="Or sign in with"
        android:textColor="#3F51B5"
        app:layout_constraintBottom_toTopOf="@+id/imageView3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginEnd="20dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/imageView3"
        app:srcCompat="@drawable/fb" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/google" />

    <ImageView
        android:id="@+id/imageView4"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginStart="20dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageView3"
        app:srcCompat="@drawable/twitter" />

</androidx.constraintlayout.widget.ConstraintLayout>

3. In activity_register.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:background="@drawable/background"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editTextname"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginTop="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_user"

        android:drawablePadding="10dp"
        android:hint="Name"
        android:inputType="textPersonName"
        android:padding="15dp"
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView" />

    <EditText
        android:id="@+id/editTextemail"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginTop="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_email"

        android:drawablePadding="10dp"
        android:hint="Email"
        android:inputType="textPersonName"
        android:padding="15dp"
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextname" />

    <EditText
        android:id="@+id/editTextUsername"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginTop="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_user"

        android:drawablePadding="10dp"
        android:hint="Username"
        android:inputType="textPersonName"
        android:padding="15dp"
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextemail" />

    <EditText
        android:id="@+id/editTextPassword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_info"
        android:drawablePadding="10dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword"
        android:padding="15dp"

        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextUsername" />

    <EditText
        android:id="@+id/editTextConfirmPassword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="#30ffffff"
        android:drawableRight="@drawable/ic_action_info"
        android:drawablePadding="10dp"
        android:ems="10"
        android:hint="Confirm Password"
        android:inputType="textPassword"
        android:padding="15dp"

        android:textColor="@color/white"
        android:textColorHint="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextPassword" />

    <Button
        android:id="@+id/btnSignup"
        android:layout_width="118dp"
        android:layout_height="59dp"
        android:layout_marginTop="20dp"
        android:text="SIGN UP"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextConfirmPassword" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="75dp"
        android:layout_height="75dp"
        android:layout_marginTop="10dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/user_icon" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:text="Or sign up with"
        android:textColor="#3F51B5"
        app:layout_constraintBottom_toTopOf="@+id/imageView3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginEnd="20dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/imageView3"
        app:srcCompat="@drawable/fb" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:srcCompat="@drawable/google" />

    <ImageView
        android:id="@+id/imageView4"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginStart="20dp"
        android:layout_marginBottom="32dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageView3"
        app:srcCompat="@drawable/twitter" />

</androidx.constraintlayout.widget.ConstraintLayout>

4. In activity_welcome.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".WelcomeActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:text="Welcome to my APP"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="www.ifixproblem.com"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.504"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintVertical_bias="0.027" />

    <TextView
        android:id="@+id/textViewName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="32dp"
        android:text="Name"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView3" />

    <TextView
        android:id="@+id/textViewEmail"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="5dp"
        android:text="Email"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textViewName" />

    <TextView
        android:id="@+id/textViewUsername"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="5dp"
        android:text="Username"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textViewEmail" />

    <TextView
        android:id="@+id/textViewPassword"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="5dp"
        android:text="Password"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textViewUsername" />

</androidx.constraintlayout.widget.ConstraintLayout>

5. In MainActivity.java

package com.eangkor.simpleuserlogin;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Button loginbtn;
    EditText username, password;
    TextView signup;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        username =(EditText)findViewById(R.id.editTextUsername);
        password =(EditText)findViewById(R.id.editTextPassword);
        signup = (TextView)findViewById(R.id.tvSignup);
        loginbtn = (Button)findViewById(R.id.btnLogin);

        loginbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(username.getText().toString().toLowerCase().equals("admin") && password.getText().toString().equals("1234")){
                    //correct login
                    Toast.makeText(MainActivity.this,"LOGIN SUCCESSFUL", Toast.LENGTH_SHORT).show();
                    // redirect to Welcome Activity
                    Intent startIntent = new Intent(getApplicationContext(), WelcomeActivity.class);
                    startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(startIntent);
                }else
                    // Fail login
                    Toast.makeText(MainActivity.this,"LOGIN FAILED !!!",Toast.LENGTH_SHORT).show();
            }
        });

        signup.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // redirect to Register Activity
                Intent startIntent = new Intent(getApplicationContext(), RegisterActivity.class);
                startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(startIntent);
            }
        });
    }
}

6. In RegisterActivity.java

package com.eangkor.simpleuserlogin;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class RegisterActivity extends AppCompatActivity {

    Button signinbtn;
    EditText name, email, username, password, confirm_password;
    boolean isAllFieldsChecked = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        name = (EditText) findViewById(R.id.editTextname);
        email = (EditText) findViewById(R.id.editTextemail);
        username = (EditText) findViewById(R.id.editTextUsername);
        password = (EditText) findViewById(R.id.editTextPassword);
        confirm_password = (EditText) findViewById(R.id.editTextConfirmPassword);
        signinbtn = (Button) findViewById(R.id.btnSignup);

        signinbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                isAllFieldsChecked = CheckAllFields();

                // the boolean variable turns to be true then
                // only the user must be proceed to the activity2
                if (isAllFieldsChecked) {
                    // redirect to Welcome Activity
                    Intent i = new Intent(getApplicationContext(), WelcomeActivity.class);
                    String strName = String.valueOf(name.getText());
                    String strEmail = String.valueOf(email.getText());;
                    String strUsername = String.valueOf(username.getText());
                    String strPassword = String.valueOf(password.getText());

                    i.putExtra("STR_NAME", strName);
                    i.putExtra("STR_EMAIL", strEmail);
                    i.putExtra("STR_USERNAME", strUsername);
                    i.putExtra("STR_PASSWORD", strPassword);

                    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(i);
                }
            }
        });
    }

    private boolean CheckAllFields() {
        if (name.length() == 0) {
            name.setError("This field is required");
            return false;
        }

        if (email.length() == 0) {
            email.setError("Email is required");
            return false;
        }

        if (username.length() == 0) {
            username.setError("This field is required");
            return false;
        }

        if (password.length() == 0) {
            password.setError("Password is required");
            return false;
        } else if (password.length() < 8) {
            password.setError("Password must be minimum 8 characters");
            return false;
        }

        if (confirm_password.length() == 0) {
            confirm_password.setError("Confirm Password is required");
            return false;
        }
        // after all validation return true.
        return true;
    }
}

7. In WelcomeActivity.java

package com.eangkor.simpleuserlogin;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class WelcomeActivity extends AppCompatActivity {
    TextView tvName,tvEmail,tvUsername,tvPassword;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        tvName=(TextView)findViewById(R.id.textViewName);
        tvEmail=(TextView)findViewById(R.id.textViewEmail);
        tvUsername=(TextView)findViewById(R.id.textViewUsername);
        tvPassword=(TextView)findViewById(R.id.textViewPassword);

        String rName,rEmail,rUsername,rPassword,rConfirmPassword;
        if (savedInstanceState == null) {
            Bundle extras = getIntent().getExtras();
            if(extras == null) {
                rName= null;
                rEmail= null;
                rUsername= null;
                rPassword= null;
            } else {
                rName= extras.getString("STR_NAME");
                rEmail= extras.getString("STR_EMAIL");
                rUsername= extras.getString("STR_USERNAME");
                rPassword= extras.getString("STR_PASSWORD");
                tvName.setText(rName);
                tvEmail.setText(rEmail);
                tvUsername.setText(rUsername);
                tvPassword.setText(rPassword);
            }
        } else {
            rName= (String) savedInstanceState.getSerializable("STR_NAME");
        }
    }
}

Result Screen:

Registration Screen

Welcome Screen

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