Project Url: issever22/iCore
Introduction: iCore is a comprehensive Android library designed to streamline the development process by providing a robust set of modular components. With built-in support for the Model-View-ViewModel (MVVM) architecture, iCore offers a collection of base classes, extension functions, and utility classes to help developers create efficient and maintainable code
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iCore is a library designed to simplify Android application development. It provides a comprehensive and standardized structure for applications using the MVVM (Model-View-ViewModel) architecture.

  • Reducing Code Duplication: By abstracting commonly used operations, it prevents the writing of repetitive code.

  • Quick Start: With ready-to-use core components, it allows for a quick start to projects.

  • Easy Integration: Easily integrates common operations like Retrofit, LiveData observation, and theme/language selection.

  • Reactive Data Management with Kotlin Flow and LiveData: iCore manages asynchronous data streams using Kotlin Flow and handles UI updates with LiveData, offering a more reactive and modern data processing model.

  • Extensive Extensions: Its extensible structure allows for customization according to application needs.

  • Centralized Management: Provides centralized management by allowing easy access to application resources with ResourceProvider.

Sample Application

To better understand how to use the iCore library and to see its architecture in action, check out the sample application included in the app module of this repository.

You can find the sample application here.



Add the following line to your project's build.gradle file:

allprojects {
    repositories {
        maven { url = uri("https://jitpack.io") }

Add the dependency to your module's build.gradle file:

dependencies {

Getting Started

Initialize the iCore library in your application's Application class:

class YourAppClass : Application() {

    override fun onCreate() {
        val coreOptions = CoreOptions().apply {
            localDataClass = YourLocalData::class.java // Default is CoreLocalData
            errorMessageField = "errorMessage" // Default is "message"

        IsseverCore.init(this, coreOptions)


Using CoreOptions is optional. If you do not provide any options, default options will be used. If you provide a localDataClass, it must extend BaseLocalData.

Example LocalData class:

object YourLocalData : BaseLocalData() {

    suspend fun someFunctions() : Resource<SomeModel> {
        // This method utilizes a core function from iCore to perform a database operation
        return databaseOperation({

Basic Usage


Create your activities by extending BaseActivity:

class YourActivity : BaseActivity<ActivityYourBinding, YourViewModel>() {

    override fun initViewBinding() = ActivityYourBinding.inflate(layoutInflater)
    override val viewModel: YourViewModel by lazy {

    override fun init() {
        // Additional initialization here

Note: If your activity or fragment does not require a ViewModel, you can use Nothing in place of YourViewModel. For example:

class YourActivity : BaseActivity<ActivityYourBinding, Nothing>() {

    override fun initViewBinding() = ActivityYourBinding.inflate(layoutInflater)

    override fun init() {
        // Additional initialization here


Create your fragments by extending BaseFragment:

class YourFragment : BaseFragment<FragmentYourBinding, YourViewModel>() {
    override fun initViewBinding() = FragmentYourBinding.inflate(layoutInflater)
    override val viewModel: YourViewModel by lazy {
        // currentActivity is a property provided by BaseFragment from iCore

    override fun init() {
        // Set the LifecycleOwner for LiveData observation
        binding.lifecycleOwner = this

        // If needed, set the loading view to be shown during loading states
        loadingView = binding.progressBar

        // If needed, set the back button to navigate up when pressed if needed
        backButton = binding.yourBackButtonImageView

    override fun initObservers() {
        // This is an extension function provided by iCore to observe LiveData
        observe(viewModel.navigateToSomewhere) {
            if (it) {
                // This is an extension function provided by iCore to navigation
                    SomeOtherActivity::class.java, // Required
                    finishActivity = true, // Default is false
                    bundle = null // Default is null


Create your ViewModels by extending BaseViewModel:

class YourViewModel(
    private val repository: YourRepository
) : BaseViewModel() {

    private val _navigateToMain = MutableLiveData<Boolean>()
    val navigateToMain: MutableLiveData<Boolean>
        get() = _navigateToMain

    fun login() {
            }, successAction = {
                _navigateToMain.value = true

    fun sampleFunction() {
            // The function to be executed to fetch data from the repository
        }, successAction = {
            // Code to be executed when the data fetching is successful
            // This is typically where you would handle the successful response
        }, errorAction = { message, errorBody ->
            // Code to be executed when there is an error in fetching data
            // Here you can handle the error
        }, loadingAction = {
            // Code to be executed while the data is being loaded
        }, snackbarType = SnackbarType.DEFAULT,
            actionText = "Action",
            snackBarAction = {
                // Action to be performed when the snackbar action is triggered
                // This is typically used for actions that the user can perform directly from the snackbar, such as retrying a failed operation


Adapter Class

Create your adapter by extending BaseAdapter:

class YourAdapter : BaseAdapter<YourModel, ItemYourBinding>(ItemYourBinding::inflate) {

    override fun bind(holder: BaseViewHolder, item: YourModel, context: Context) {
        holder.apply {
            binding.tvYourTextView.text = item.someProperty

Activity or Fragment

Use your adapter in an Activity or Fragment:

val adapter = YourAdapter()
binding.recyclerView.adapter = adapter

// `view` is the specific View within the item layout that was clicked.
// This allows you to perform actions or access properties of the clicked View directly.
adapter.setOnItemClickListener { item, view ->
    // Do something with item or view
adapter.setOnItemLongClickListener { item, view ->
    // Do something with item or view

Retrofit Setup

To create a Retrofit instance using iCore, follow these steps:

Network Module

Initialize Retrofit in a singleton object or a class. You can add headers if needed.

object RetrofitInstance {

    private val headers = mapOf("SomeKey" to "SomeValue")

    val retrofit: Retrofit by lazy {
        CoreNetwork.provideRetrofit("https://yourapi.baseurl.com/", headers)

Remote Data

Create a remote data source class by extending BaseRemoteData:

class SomeRemoteData(private val service: SomeService) : BaseRemoteData {

    suspend fun login(user: SomeRequestModel): Resource<SomeResponseModel> {
        return responseHandler({ service.login(user) })

    // If needed, you can add additional actions or convert the response body to the desired entity.
    suspend fun login(user: SomeRequestModel): Resource<SomeResponseConvertedEntity> {
        return responseHandler({ service.login(user) }, entityConverter = { response ->
            // Here you can convert the response to the desired entity.
        }, doThenOnIO = { response ->
            // Here you can perform additional operations in the IO thread.


Create a repository class by extending BaseRepository:

class SomeRepository(private val remoteData: SomeRemoteData) : BaseRepository {

    suspend fun login(user: SomeRequestModel): Flow<Resource<SomeResponseModel>> {
        return emitResult({ remoteData.login(user) })

    // If needed, you can add additional actions.
    suspend fun login(user: SomeRequestModel): Flow<Resource<SomeResponseModel>> {
        return emitResult({ remoteData.login(user) }, doThenOnMain = { resource ->
            // Here you can perform additional operations on the Main Thread.

Extension Functions

Example Usages

iCore provides various useful extension functions. Here are a few examples:

Observing LiveData

observe(viewModel.someLiveData) {
    // Handle the observed data

Theme Selection


Language Selection

private val languages = mapOf(
    "English" to "en",
    "Türkçe" to "tr"


Loading Images

myImageView.loadImage("ImageUrl, ImageUri or ImageSource")

Custom Dialog

            title = "Title", // Required
            message = "Message", // Required
            positiveButtonText = "Positive Button", //Default is "Okay"
            negativeButtonText = "Negative Button", // Default is "Cancel"
            useRedPositiveButton = true, //Default is false
            onPositiveClick = {
                // Do something
            onNegativeClick = {
                // Do something
            customizeView = { dilogViewBindig ->
                // Do something

For a complete list of extension functions and their usage, please refer to the source code.

Accessing Application Context

You can use ResourceProvider to access the application context and resources from anywhere in your application:

// Get application context
val appContext = ResourceProvider.getAppContext()

// Get a string resource
val myString = ResourceProvider.getString(R.string.my_string)

// Get a drawable resource
val myDrawable = ResourceProvider.getDrawable(R.drawable.my_drawable)

// Get a color resource
val myColor = ResourceProvider.getColor(R.color.my_color)

// Get a dimension resource
val myDimension = ResourceProvider.getDimension(R.dimen.my_dimension)

// Get a boolean resource
val myBoolean = ResourceProvider.getBoolean(R.bool.my_boolean)

// Get an integer resource
val myInteger = ResourceProvider.getInteger(R.integer.my_integer)


If you would like to contribute to this project, please follow these steps:

  1. Fork this repository
  2. Create a new branch (git checkout -b feature/amazing-feature)
  3. Commit your changes (git commit -am 'Add an amazing feature')
  4. Push your branch (git push origin feature/amazing-feature)
  5. Create a new Pull Request

For a detailed list of changes, please refer to the CHANGELOG.md file.


This project is licensed under the Apache 2.0 License.

Your feedback and contributions are valuable. Happy coding!

Made with ❤️ by Muhammed Issever
muhammed@issever.co | isseverdev@gmail.com

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