This is a sample project for displaying items grouped by list ID in an expandable list. Each item can be expanded to view its contents.

• Android Studio
• Kotlin plugin for Android Studio

1. Clone the Repository:

git clone https://github.com/catchashu10/FetchAndroidProject.git

2. Open the Project in Android Studio: Start Android Studio Select “Open an existing Android Studio project” Navigate to the cloned project directory and select it.

3. Run the Application: Run Gradle Sync. After the project is opened and indexed, press the green triangular "Run" button at the top of Android Studio, or use the Shift + F10 shortcut to run the project on an emulator or connected Android device.

4. Build the APK: Go to Build menu Select Build Bundle(s) / APK(s) Select Build APK(s)

1. Displays items grouped by list ID in an expandable list.
2. Fetches data from a remote server asynchronously.
3. Filters out items with null or empty names.
4. Sorts the items in ascending order based on their names within each list ID group.

1. Data Retrieval: Using OkHttp library to perform network requests to fetch JSON data.
2. Data Processing: Utilizing Gson for JSON parsing and Kotlin’s built-in functions for data filtering, sorting, and transformation.
3. ExpandableView & Adapter Design: Implementing a Expandable with an Adapter that uses different view types for headers and items, allowing for the creation of expandable lists.
4. ViewHolder Pattern: Utilizing the ViewHolder pattern within the Adapter for efficient recycling of views and reducing memory usage.
5. User Interface Design: Employing Material Design principles for aesthetic UI representation, including appropriate layouts, colors, and fonts.