PROGRAM 04:- AIM: - Create “Hello World” application. That will display “Hello World” in the middle of the screen in the red color with white background.

 

Code:-

 

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

<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".MainActivity">



<TextView

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:layout_gravity="center"

    android:text="Hello World!"

    android:textColor="#800000"

    android:textSize="60sp"

    android:textStyle="bold"

    app:layout_constraintBottom_toBottomOf="parent"

    app:layout_constraintLeft_toLeftOf="parent"

    app:layout_constraintRight_toRightOf="parent"

    app:layout_constraintTop_toTopOf="parent" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

 

 

Java Code :

 

package com.example.helloworld;



import android.os.Bundle;



import com.google.android.material.snackbar.Snackbar;



import androidx.appcompat.app.AppCompatActivity;



import android.view.View;



import androidx.navigation.NavController;

import androidx.navigation.Navigation;

import androidx.navigation.ui.AppBarConfiguration;

import androidx.navigation.ui.NavigationUI;



import com.example.helloworld.databinding.ActivityMainBinding;



import android.view.Menu;

import android.view.MenuItem;



public class MainActivity extends AppCompatActivity {



    private AppBarConfiguration appBarConfiguration;

    private ActivityMainBinding binding;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);



        binding = ActivityMainBinding.inflate(getLayoutInflater());

        setContentView(binding.getRoot());







    }



    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.menu_main,menu);

        return true;

    }



    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();



        //noinspection SimplifiableIfStatement

        if (id == R.id.action_settings) {

            return true;

        }



        return super.onOptionsItemSelected(item);

    }



    @Override

    public boolean onSupportNavigateUp() {

        NavController navController = Navigation.findNavController(this,R.id.nav_host_fragment_content_main);

        return NavigationUI.navigateUp(navController,appBarConfiguration)

                || super.onSupportNavigateUp();

    }

}

 

Output:-