MVVM Image Search

a simple app to practice on some new topics created by Coding In Flow like:-

• Retrofit
• Glide (Coil Was Bad)
• RecyclerView with ListAdapter and Page Adapter
• Paging Library 3
• Coroutines (Defered for api)
• MVVM
• Dependency Injection Using Dagger Hilt
• Two-Way DataBinding & BindingAdapters
• Navigation Component
• Single Activity Architecture

##Demo Demo

Dependencies

    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    def paging_version = "3.1.1"
    def nav_version = "2.5.3"
    def retrofit_version = "2.9.0"
    def dagger_version = "2.44"
    def lifecycle_version = "2.6.0-alpha03"
    def lottieVersion = "3.4.0"
    def moshiVersion = "1.13.0"


    implementation 'androidx.core:core-ktx:1.9.0'
    implementation 'androidx.appcompat:appcompat:1.5.1'
    implementation 'com.google.android.material:material:1.7.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

    //Paging3
    implementation "androidx.paging:paging-runtime:$paging_version"

    //Kotlin Navigation Component
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version"

    //Retrofit
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-moshi:$retrofit_version"
    implementation "com.squareup.moshi:moshi-kotlin:$moshiVersion"

    //Dagger Hilt
    implementation "com.google.dagger:hilt-android:$dagger_version"
    kapt "com.google.dagger:hilt-compiler:$dagger_version"

    //Coil
    implementation "io.coil-kt:coil:2.2.2"

    //Glide
    implementation 'com.github.bumptech.glide:glide:4.14.2'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.14.2'
    implementation 'jp.wasabeef:glide-transformations:4.3.0'

    //Circular Image View
    implementation 'de.hdodenhof:circleimageview:3.1.0'

    //Shimmer
    implementation 'com.facebook.shimmer:shimmer:0.5.0'

    //Lifecycle
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"

    //Lottie
    implementation "com.airbnb.android:lottie:$lottieVersion"

Plugins

    id 'com.android.application'
    id 'org.jetbrains.kotlin.android'
    id 'androidx.navigation.safeargs.kotlin'
    id 'kotlin-parcelize'
    id 'kotlin-kapt'
    id 'com.google.dagger.hilt.android'

Paging library 3 Overview

Benefits

The Paging library includes the following features:

a) In-memory caching for your paged data. This ensures that your app uses system resources efficiently while working with paged data.

b) Built-in request deduplication, ensuring that your app uses network bandwidth and system resources efficiently.

c) Configurable RecyclerView adapters that automatically request data as the user scrolls toward the end of the loaded data.

d) First-class support for Kotlin coroutines and Flow, as well as LiveData and RxJava.

e) Built-in support for error handling, including refresh and retry capabilities.

Paging Library Components

PagingData - a container for paginated data. Each refresh of data will have a separate corresponding PagingData.

PagingSource - a PagingSource is the base class for loading snapshots of data into a stream of PagingData.

Pager.flow - builds a Flow<PagingData>, based on a PagingConfig and a function that defines how to construct the implemented PagingSource.

PagingDataAdapter - a RecyclerView.Adapter that presents PagingData in a RecyclerView. The PagingDataAdapter can be connected to a Kotlin Flow, a LiveData, an RxJava Flowable, or an RxJava Observable. The PagingDataAdapter listens to internal PagingData loading events as pages are loaded and uses DiffUtil on a background thread to compute fine-grained updates as updated content is received in the form of new PagingData objects.

RemoteMediator - helps implement pagination from network and database.

#Navigation Component Graph