Simple User Registration and Login Form in Android studio with source code

How to create login and user registration form in android studio using SQLite database?

Simple User Registration and Login Form in Android studio.

In this blog post, create a simple user registration and login form using an SQLite database in Android Studio.

We will also use authentication for invalid passwords or display an error message if the user already has an account.

We will use the SQLite database to store usernames and passwords in the database.

Also, we will use material design in the edit text box and button.

First, we will create a database OpenHelper Class named 

DBmain.java

package com.pd.userlogin;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import androidx.annotation.Nullable;

public class DBmain extends SQLiteOpenHelper {
    public DBmain(@Nullable Context context) {
        super(context, "LoginDb", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table users(username text primary key, password text)");

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
     db.execSQL("drop table if exists users");
    }
}

Now go to MainActivty class 

MainActivity.java

package com.pd.userlogin;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.material.textfield.TextInputEditText;

public class MainActivity extends AppCompatActivity {
    TextInputEditText username,password,repassword;
    Button registration;
    TextView loginform;
    DBmain dBmain;
    SQLiteDatabase sqLiteDatabase;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        username=(TextInputEditText)findViewById(R.id.username);
        password=(TextInputEditText)findViewById(R.id.password);
        repassword=(TextInputEditText)findViewById(R.id.repassword);
        loginform=(TextView)findViewById(R.id.login_form);
        registration=(Button)findViewById(R.id.btnregi);

        dBmain=new DBmain(this);

        registration.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            String user=username.getText().toString();
            String pass=password.getText().toString();
            String repass=repassword.getText().toString();

            if (username.getText().toString().length()<=0){
                username.setError("Please set username");
            }else if (password.getText().toString().length()<=0){
                password.setError("Please set Password");
            }else if (repassword.getText().toString().length()<=0){
                repassword.setError("Please set Repassword");
            }else if (username.equals("")||password.equals("")||repassword.equals("")){
                Toast.makeText(MainActivity.this, "Empty field not allow", Toast.LENGTH_SHORT).show();
            }else{
                if (pass.equals(repass)){
                    Boolean checkuser=checkusername(user);
                    if (checkuser==false){
                        Boolean insert=inserData(user,pass);
                        if (insert==true){
                            Toast.makeText(MainActivity.this, "Registration successfully", Toast.LENGTH_SHORT).show();
                        startActivity(new Intent(getApplicationContext(),LoginForm.class));
                        }else {
                            Toast.makeText(MainActivity.this, "Registration failure", Toast.LENGTH_SHORT).show();
                        }
                    }else {
                        Toast.makeText(MainActivity.this, "user name already exists", Toast.LENGTH_SHORT).show();
                    }
                }else{
                    AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
                    builder.setTitle("Try Again");
                    builder.setIcon(R.drawable.ic_baseline_error_24);
                    builder.setMessage("Password not Match");
                    builder.show();
                }
            }
            }
        });
        loginform.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            startActivity(new Intent(getApplicationContext(),LoginForm.class));
            }
        });
    }

    private Boolean inserData(String user, String pass) {
    sqLiteDatabase=dBmain.getWritableDatabase();
        ContentValues contentValues=new ContentValues();
        contentValues.put("username",user);
        contentValues.put("password",pass);

        long rec=sqLiteDatabase.insert("users",null,contentValues);
        if (rec==-1){
            return false;

        }else {
            return true;
        }
    }

    private Boolean checkusername(String user) {
    sqLiteDatabase=dBmain.getWritableDatabase();
        Cursor cursor=sqLiteDatabase.rawQuery("select *from users where username=?",new String[]{user});
        if (cursor.getCount()>0){
            return true;
        }else {
            return false;
        }
    }
}

we well create xml file to store data through edit text box. 

activity_main.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_vertical"
    android:orientation="vertical"
    android:background="@drawable/bgcolor"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:gravity="center"
        android:text="User Login form"
        android:textSize="25dp" />

    <com.google.android.material.textfield.TextInputLayout
        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:hint="Enter username"
        app:endIconMode="clear_text">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/username"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:ems="25" />
    </com.google.android.material.textfield.TextInputLayout>


    <com.google.android.material.textfield.TextInputLayout
        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:hint="Enter Password">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/password"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:ems="25"
            android:inputType="textPassword" />
    </com.google.android.material.textfield.TextInputLayout>


    <com.google.android.material.textfield.TextInputLayout
        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:hint=" ReEnter Password">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/repassword"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:ems="25"
            android:inputType="textPassword" />
    </com.google.android.material.textfield.TextInputLayout>

    <Button
        android:id="@+id/btnregi"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:text="Registration" />

    <TextView
        android:id="@+id/login_form"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:text="Already have a account" />
</LinearLayout>

Now create a new activity named 

LoginForm.java

package com.pd.userlogin;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.google.android.material.textfield.TextInputEditText;

public class LoginForm extends AppCompatActivity {
    TextInputEditText loginuser,loginpassword;
    Button btnlogin;
    DBmain dBmain;
    SQLiteDatabase sqLiteDatabase;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_form);

        loginuser=findViewById(R.id.login_user);
        loginpassword=findViewById(R.id.login_password);
        btnlogin=findViewById(R.id.btn_login);
        dBmain=new DBmain(this);

        btnlogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            String user=loginuser.getText().toString();
            String pass=loginpassword.getText().toString();
            if (user.equals("")||pass.equals("")){
                Toast.makeText(LoginForm.this, "Empty field Not allow", Toast.LENGTH_SHORT).show();
            }else {
                Boolean checkuserpass=checkuserpassword(user,pass);
                if (checkuserpass==true){
                    Toast.makeText(LoginForm.this, "Login successfully", Toast.LENGTH_SHORT).show();
                startActivity(new Intent(getApplicationContext(),Welcome.class));
                }else {
                    AlertDialog.Builder builder=new AlertDialog.Builder(LoginForm.this);
                    builder.setTitle("Error Messsage");
                    builder.setMessage("Password and Username are Wrong");
                    builder.setIcon(R.drawable.ic_baseline_error_24);
                    builder.setPositiveButton("OK",null);
                    builder.setCancelable(true);

                    final AlertDialog alertDialog= builder.create();
                    alertDialog.show();

                    alertDialog.getWindow().setGravity(Gravity.TOP);
                }
            }
            }
        });
    }

    private Boolean checkuserpassword(String user, String pass) {
    sqLiteDatabase=dBmain.getWritableDatabase();
        Cursor cursor=sqLiteDatabase.rawQuery("select *from users where username=? and password=?",new String[]{user,pass});

        if (cursor.getCount()>0){
            return true;
        }else{
            return false;
        }
    }

    public void Regi(View view) {
        startActivity(new Intent(getApplicationContext(),MainActivity.class));
    }
}

Now, go to activity_login_form.xml file and create some edit text box and login button.

 activity_login_form.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:orientation="vertical"
    android:gravity="center_vertical"
    android:background="@drawable/bgcolor"
    tools:context=".LoginForm">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="User Login"
        android:layout_marginRight="@dimen/mr"
        android:layout_marginLeft="@dimen/ml"
        android:gravity="center"
        android:layout_gravity="center"
        android:textSize="25dp"
        android:textStyle="bold"/>

        <com.google.android.material.textfield.TextInputLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/ml"
            android:layout_marginRight="@dimen/mr"
            android:hint="username"
            style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
            app:endIconMode="clear_text">

            <com.google.android.material.textfield.TextInputEditText
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/login_user"
                android:ems="25"/>
        </com.google.android.material.textfield.TextInputLayout>


    <com.google.android.material.textfield.TextInputLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="@dimen/ml"
        android:layout_marginRight="@dimen/mr"
        android:hint="Enter Password"
        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
        app:endIconMode="password_toggle">

        <com.google.android.material.textfield.TextInputEditText
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/login_password"
            android:ems="25"/>
    </com.google.android.material.textfield.TextInputLayout>

<!--    <com.google.android.material.textfield.TextInputLayout-->
<!--        android:layout_width="wrap_content"-->
<!--        android:layout_height="wrap_content"-->
<!--        android:layout_marginLeft="@dimen/ml"-->
<!--        android:layout_marginRight="@dimen/mr"-->
<!--        android:hint="ReEnter Password"-->
<!--        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"-->
<!--        app:endIconMode="password_toggle">-->

<!--        <com.google.android.material.textfield.TextInputEditText-->
<!--            android:layout_width="match_parent"-->
<!--            android:layout_height="match_parent"-->
<!--            android:id="@+id/login_repassword"-->
<!--            android:ems="25"/>-->
<!--    </com.google.android.material.textfield.TextInputLayout>-->

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginRight="@dimen/mr"
            android:layout_marginLeft="@dimen/ml"
            android:id="@+id/btn_login"
            android:text="Login"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New User"
        android:layout_marginRight="@dimen/mr"
        android:onClick="Regi"
        android:layout_gravity="end"/>
</LinearLayout>

Finally, we will create a welcome activity. If the user logs in successfully, then redirects to the welcome activity.

Welcome.java

package com.pd.userlogin;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class Welcome extends AppCompatActivity {

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

We will write some messages to display the welcome activity page. 

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=".Welcome">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Welcome to Course Code"
        android:textSize="30dp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

watch video 

https://youtu.be/PXUj0rIleQg 

SUBSCRIBE to download

Download Source code

Tags: User login app android

• Facebook
• Twitter