SharedPreferences

 1.

package com.example.practice;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;

import java.util.Map;
import java.util.Set;


public class MainActivity extends AppCompatActivity {
    Handler handler;

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

        handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                //SharedPreferences value get with Check
                SharedPreferences sharedPreferences = getSharedPreferences("Login", MODE_PRIVATE);
                Boolean log = sharedPreferences.getBoolean("flag", false);
                if (log == true){

                    Intent intent = new Intent(MainActivity.this, MainActivity3.class);
                startActivity(intent);
                finish();

            }else {

                    Intent intent = new Intent(MainActivity.this, MainActivity2.class);
                    startActivity(intent);
                    finish();

                }
            }
        }, 3000);

    }
}

2.

package com.example.practice;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity2 extends AppCompatActivity {
    Button  button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);


             button = findViewById(R.id.b1);

     button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        // value put
        SharedPreferences sharedPreferences = getSharedPreferences("Login",MODE_PRIVATE);

        SharedPreferences.Editor edi = sharedPreferences.edit();

        edi.putBoolean("flag",true);

        edi.commit();

        Intent intent = new Intent(MainActivity2.this,MainActivity3.class);

        startActivity(intent);
        finish();



    }
});


    }
}

3.

package com.example.practice;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity3 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);



    }
}

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