Android Development Course

Introduction to Android Development

Module 1: Getting Started with Android Development

Learn the basics of Android Development.

Lesson 1: What is Android Development?

Android development is the process of creating mobile applications for devices running the Android operating system.

• Key Points: Open-source platform, Java and Kotlin for coding, wide device support.
• Tools: Android Studio, Android SDK.
• Why Android? Android powers billions of devices worldwide.

Lesson 2: Android Architecture

Android apps are built with several components that work together to form an app. These components include activities, services, content providers, and broadcast receivers.

• Activity: Represents a single screen with a user interface.
• Service: Runs in the background to perform long-running tasks.
• Content Providers: Handle data sharing between apps.
• Broadcast Receivers: Listen for system-wide broadcast announcements.

Lesson 3: Setting Up the Development Environment

Setting up Android Studio is the first step in Android development. You will need the following:

• Android Studio: The official IDE for Android development.
• Java or Kotlin: Programming languages for Android apps.
• Emulator: To test your app on a virtual device.

Module 2: Setting Up the Environment

Learn how to set up your tools for Android development.

Lesson 1: Installing Android Studio

Follow these steps to install Android Studio:

1. Download Android Studio from the official website.
2. Run the installer and follow the instructions.
3. Once installed, launch Android Studio and set up the Android SDK.

Lesson 2: Setting Up Android Emulator

Test your app on a virtual device using the Android Emulator:

• Go to AVD Manager in Android Studio.
• Create a new virtual device (e.g., Pixel 3).
• Choose the system image (e.g., Android 12).
• Launch the emulator to start testing your app.

Lesson 3: Testing on a Real Device

If you prefer to test on a physical device:

• Enable Developer Options on your Android device.
• Enable USB Debugging.
• Connect the device via USB and select it in Android Studio for testing.

Module 3: Creating Your First App

Build your first Android app step-by-step.

Lesson 1: Creating a New Project

To create your first Android app:

1. Open Android Studio and select New Project.
2. Choose a project template (e.g., Basic Activity).
3. Set your app's name, package name, and save location.
4. Select the language (Java or Kotlin) and minimum API level.
5. Click Finish to create the project.

Lesson 2: Understanding the Layout

Your first app includes a layout file that defines the user interface (UI). You'll edit this layout to display a button and text:

• In the res/layout/activity_main.xml file, add a TextView and a Button element.
• Use the LinearLayout or RelativeLayout to arrange elements.

Lesson 3: Writing Code to Handle UI Actions

Set up an OnClickListener to handle the button click action:

• Open the MainActivity.java or MainActivity.kt file.
• Write code to show a Toast message when the button is clicked:
```java Button myButton = findViewById(R.id.my_button); myButton.setOnClickListener(v -> { Toast.makeText(MainActivity.this, "Button Clicked!", Toast.LENGTH_SHORT).show(); }); ```