Ex.No:1 Name: Date : Reg.No: SIMPLE MOBILE APP DEVELOPMENT Aim: To create a basic Android application that displays "Hello World" on the screen. Procedure: 1. Open Android Studio → New Project → Empty Activity. 2. Name the project HelloWorld. 3. In activity_main.xml, place a TextView with text “Hello World”. 4. In MainActivity.java, set content view to activity_main. 5. Run the application on an emulator/phone. XML File Java File package com.example.helloworld; import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } } Expected Output Result: The program has executed successfully. Ex.No:2 Name: Da te : Reg.No: Applying Styles and Themes to Activity Aim: To apply custom themes using styles.xml. Procedure: 1. Open Android Studio project. 2. In res/values/styles.xml, define a new style with colors, text, etc. 3. Apply this style in AndroidManifest.xml or widgets (e.g., TextView). 4. Run the application. XML File Java Fil e // styles.xml Expected Output Result: The program has executed successfully. Ex.No:3 Name: Date : Reg.No: Designing UI Using Views Aim: To design UI using Button, TextView, and EditText. Procedure: 1. Create a project in Android Studio. 2. In activity_main.xml, add TextView, EditText, and a Button. 3. In MainActivity.java, get values from EditText and show greeting using Toast. 4. Run the app and test by entering a name. XML File

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