Programming Brothers

 MianActivity.java package com.example.menuapplication ; import androidx.annotation. NonNull ; import androidx.appcompat.app.AppCompatActivity ; import android.os.Bundle ; import android.view.Menu ; import android.view.MenuItem ; import android.widget.Toast ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; } //inflate menu @Override public boolean onCreateOptionsMenu (Menu menu) { getMenuInflater().inflate(R.menu. main_menu , menu) ; return true; } //item select menu @Override public boolean onOptionsItemSelected ( @NonNull MenuItem item) { switch (item.getItemId()){ case R.id. menu1 : Toast. makeText ( this, "You have selected menu 1" , Toast. LENGTH_SHORT ).show() ; case R.id. menu2 : Toast. makeTex...

 MainActivity.java package com.example.backtomainactivity ; import androidx.appcompat.app.AppCompatActivity ; import android.content.Intent ; import android.os.Bundle ; import android.view.View ; import android.widget.Button ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; Button secondActivity=findViewById(R.id. secondActivity ) ; secondActivity.setOnClickListener( new View.OnClickListener() { @Override public void onClick (View view) { Intent secondActivityIntent= new Intent(MainActivity. this, SecondActivity. class ) ; startActivity(secondActivityIntent) ; } }) ; } } SecondActivity.java package com.example.backtomainactivity ; import androidx.appcompat.app.AppCompatActivity ; import android.os.Bundle ; import an...