Architecture of Mobile Applications

1.10. Example Code

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

}

 Navigation: Users navigate between Activities using Intents. An Intent is a message that you send to the system, specifying which Activity you want to start.

 Example: In a social media app, the "Home" screen, the "Profile" screen, and the "Post" screen would each be separate Activities

Use Cases

• Displaying the main UI of an app.
• Handling user interactions, such as button clicks.
• Navigating between different screens.