Login Example

-

 Mainactivity -


package com.example.loginvalidation;


import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Window;

import android.view.WindowManager;


public class MainActivity extends AppCompatActivity {


    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        getSupportActionBar().hide();

        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_main);


        Thread thread=new Thread(){

            @Override

            public void run() {


                try {

                    sleep(1000);


                }catch(Exception e){

                    e.printStackTrace();


                }finally{

                    Intent intent=new Intent(MainActivity.this,LoginActivity.class);

                    startActivity(intent);


                }


            }

        };thread.start();

    }

}


---------------------------------------------------------------------------------------------------------------------------


HomeActivity -


package com.example.loginvalidation;


import androidx.appcompat.app.AppCompatActivity;


import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;


public class HomeActivity extends AppCompatActivity {

    TextView txtuser,txtpass;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home);

        txtuser=findViewById(R.id.text1);

        txtpass=findViewById(R.id.text2);


        Intent intent=getIntent();

        String username=intent.getStringExtra("username");

        String password=intent.getStringExtra("password");


        txtuser.setText(username);

        txtpass.setText(password);

    }

}


--------------------------------------------------------------------------------------------------------------------------------


LoginActivity -


package com.example.loginvalidation;


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 LoginActivity extends AppCompatActivity {

    EditText username1,password1;

    Button login;

    TextView attempt;

    int count=5;


    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_login);

        username1=findViewById(R.id.username);

        password1=findViewById(R.id.password);

        login=findViewById(R.id.btnlogin);

        attempt =findViewById(R.id.attempt);


        login.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                String USERNAME=username1.getText().toString();

                String PASSWORD=password1.getText().toString();


                if(USERNAME.equals("admin")&& PASSWORD.equals("1234"))

                {


                    String USER=username1.getText().toString();

                    String PASS=password1.getText().toString();


                    Intent intent1=new Intent(LoginActivity.this,HomeActivity.class);

                    intent1.putExtra("username",USER);

                    intent1.putExtra("password",PASS);

                    startActivity(intent1);

                }

                else {

                    count--;

                    attempt.setText(String.valueOf(count));

                    Toast.makeText(LoginActivity.this, "Incorrect user or pass , " + String.valueOf(count), Toast.LENGTH_LONG).show();

                    if (count == 0) {

                        View b = findViewById(R.id.btnlogin);

                        b.setVisibility(View.GONE);

                    }

                }



            }

        });



    }

}


----------------------------------------------------------------------------------------------------------------------------


activity_main -


  

<?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:background="#ffffff"

    android:gravity="center"

    android:orientation="vertical"

    tools:context=".MainActivity">



    <ImageView

        android:layout_width="250dp"

        android:layout_height="250dp"

        android:layout_gravity="center"

        android:scaleType="fitXY"

        android:src="@drawable/loginlogo" />



</LinearLayout>


------------------------------------------------------------------------------------------------------------------------------


activity_home -


<?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"

    tools:context=".HomeActivity">


    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:id="@+id/text1"

        android:text="Username"

        android:textSize="35sp"

        android:textStyle="bold"

        />


    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:id="@+id/text2"

        android:text="Password"

        android:textSize="35sp"

        android:layout_marginTop="35dp"

        android:textStyle="bold"

        />


</LinearLayout>


-----------------------------------------------------------------------------------------------------------------------------


activity_main -


<?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:background="#FAEBD7"

    android:gravity="center"

    tools:context=".LoginActivity">


    <EditText

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="Username"

        android:gravity="center"

        android:inputType="text"

        android:textSize="25sp"

        android:drawableTop="@drawable/username"

        android:id="@+id/username"

        app:fontFamily="@font/adamina"

        />

    <EditText

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="Password"

        android:gravity="center"

        android:textSize="25sp"

        android:inputType="numberPassword"

        android:drawableTop="@drawable/password"

        android:id="@+id/password"

        app:fontFamily="@font/adamina"

        />


    <Button

        android:id="@+id/btnlogin"

        android:layout_width="124dp"

        android:layout_height="72dp"

        android:layout_marginTop="35dp"

        android:background="#FAEBD7"

        android:text="Login"

        android:textSize="25sp"

        app:fontFamily="@font/adamina"



        />


    <TextView

        android:id="@+id/attempt"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="45dp"

        android:text="Attempt"

        android:textSize="18sp"

        app:fontFamily="@font/adamina" />


</LinearLayout>


-----------------------------------------------------------------------------------------------------------------------------


AndroidManifest -


<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.loginvalidation">


    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".HomeActivity"></activity>

        <activity android:name=".LoginActivity" />

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />


                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>


        <meta-data

            android:name="preloaded_fonts"

            android:resource="@array/preloaded_fonts" />

    </application>


</manifest>

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