Paging V3 Library Demo App in Kotlin (with Compose and AndroidViews)

A simple demo app to test out the new Paging V3 Library released by Google as part of the Architectural Components. The app consist of a simple List of infinite images displayed in 3 columns, which are loaded base on a search query, using the public Flickr API.

Screenshot

Running Instrutions

Before running the app, please remember to add your Flick API KEY to the file FlickrApi inside the method getFlickApiKey (Link to File). To get a Flickr API Key follow the instructions of this link.

/**
 * Returns the API KEY used for authentication with the Flickr API.
 */
fun getFlickApiKey() : String {
    return "PASTE_YOUR_FLICKR_API_KEY_HERE"
}

Implementation Details

• Written 100% in Kotlin.
• Uses Jetpack Compose for the Compose version
• Uses ViewBinding for the Android Views version
• Uses Dagger for dependency injection.
• Uses Leak Canary to detect Memory Leaks.
• Uses Picasso for image loading and caching.
• Uses Coil-kt for image loading and caching in the Compose Activity.
• Uses Retrofit for networking with Gson Converter.
• Uses Pagination V3 from the Google's Jetpack Components in coordination with Retrofit's Coroutine support.
• Uses LiveData of a PagingData.
• Uses PagingSource and PagingDataAdapter.
• Handles screen rotations by caching the PagingData in the ViewModel Coroutine Scope and the search query during onSaveInstanceState.

Architecture

References

• CodeLab: https://developer.android.com/codelabs/android-paging#0
• Paging V3: https://developer.android.com/topic/libraries/architecture/paging/v3-overview
• Migration to Paging V3 Steps: https://developer.android.com/topic/libraries/architecture/paging/v3-migration

License

 Copyright 2023 Benny Jon

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.