MainActivity.java.txt

package com.example.securesharedpreference;

import androidx.appcompat.app.AppCompatActivity;
import androidx.security.crypto.EncryptedSharedPreferences;
import androidx.security.crypto.MasterKeys;

/////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;

import java.io.IOException;
import java.security.GeneralSecurityException;

public class MainActivity extends AppCompatActivity {
    EditText et_username,et_password;
    Button submitbtn;
    TextView textView;
    SharedPreferences sharedPreferences;
    SharedPreferences.Editor editor;
    Boolean savelogin;
    CheckBox savecheck;
    ImageView logo,unmlogo,passlogo;

    /////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        et_username = findViewById(R.id.et_username);
        et_password = findViewById(R.id.et_password);
        submitbtn = findViewById(R.id.btnsave);
        savecheck = findViewById(R.id.rememberme);
        logo = findViewById(R.id.logo);
        unmlogo = findViewById(R.id.unmlogo);
        passlogo = findViewById(R.id.passlogo);

        //IMAGES get through Glide//
        Glide.with(getApplicationContext()).load("https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Ei-sc-github.svg/768px-Ei-sc-github.svg.png").into(logo);
        Glide.with(getApplicationContext()).load("https://i.pinimg.com/originals/e4/fb/d4/e4fbd41a84015e49d95baddee5275043.png").into(unmlogo);
        Glide.with(getApplicationContext()).load("https://www.lockitsolutions.com/blog/wp-content/uploads/2015/05/lockitLogo.png").into(passlogo);
        //IMAGES get through Glide//


        try {
            String masterKeys = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC);
            sharedPreferences = EncryptedSharedPreferences.create("FILE",
                    masterKeys,
                    getApplicationContext(),
                    EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                    EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM);

        } catch (GeneralSecurityException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
/////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
        editor =sharedPreferences.edit();

        submitbtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                login();
            }
        });
        savelogin = sharedPreferences.getBoolean("savelogin",true);
        if (savelogin==true)
        {
            et_username.setText(sharedPreferences.getString("username",null));
            et_password.setText(sharedPreferences.getString("password",null));
        }

        if(et_username.getText().toString().equals("divyamoza") && et_password.getText().toString().equals("divyam123"))
        {
            Intent intent = new Intent(getApplicationContext(),MainActivity2.class);
            startActivity(intent);
        }


/////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
    }

    private void login()
    {
        String username = et_username.getText().toString();
        String password = et_password.getText().toString();

        if(username.equals("divyamoza") && password.equals("divyam123"))
        {
            Toast.makeText(this, "Welcome", Toast.LENGTH_SHORT).show();
            Intent intent = new Intent(getApplicationContext(),MainActivity2.class);
            startActivity(intent);
        }
        /////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
        if(savecheck.isChecked())
        {
            editor.putBoolean("savelogin",true);
            editor.putString("username",username);
            editor.putString("password",password);
            editor.commit();
        }
        /////////////////////////////////Made By Divyam Oza(OD)////////////////////////////
    }
}