MVVM LiveData ViewModel Gradle Data Binding

Data binding example.java

private lateinit var binding: ActivityMainBinding
binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
// Set view model
binding.viewModel = viewModel
// Execute pending binding data
binding.executePendingBindings()
  
// View model
val viewModel = ViewModelProviders.of(this, viewModelFactory).get(MainViewModel::class.java)  

Data binding gradle.java

// Setup gradle
// at the top of file 
apply plugin: 'kotlin-kapt'


android {
    //other things that we already used
    dataBinding.enabled = true
}
dependencies {
    //other dependencies that we used
    kapt "com.android.databinding:compiler:3.0.0-beta1"
}

MVVM Note.java

// Setup gradle dependencies 

// A ViewModel clas is reponsible for preparing and managing data for Activity or a Fragment
// https://developer.android.com/reference/android/arch/lifecycle/ViewModel.html
OurViewModel extends ViewModel(android.arch.lifecycle.ViewModel)

  

MVVM Setup Gradle.java

// Add the Google maven repository
allprojects {
    repositories {
        jcenter()
        google()
    }
}

// https://developer.android.com/topic/libraries/architecture/adding-components.html  
// ViewModel and LiveData
implementation "android.arch.lifecycle:extensions:1.1.0"
// alternatively, just ViewModel
implementation "android.arch.lifecycle:viewmodel:1.1.0"
// alternatively, just LiveData
implementation "android.arch.lifecycle:livedata:1.1.0"

annotationProcessor "android.arch.lifecycle:compiler:1.1.0"

// Room (use 1.1.0-alpha3 for latest alpha)
implementation "android.arch.persistence.room:runtime:1.0.0"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

// Paging
implementation "android.arch.paging:runtime:1.0.0-alpha6"

// Test helpers for LiveData
testImplementation "android.arch.core:core-testing:1.1.0"

// Test helpers for Room
testImplementation "android.arch.persistence.room:testing:1.0.0"
    
// Adds optional support for Room RxJava and LiveData ReactiveStreams.
dependencies {
    // RxJava support for Room (use 1.1.0-alpha3 for latest alpha)
    implementation "android.arch.persistence.room:rxjava2:1.0.0"

    // ReactiveStreams support for LiveData
    implementation "android.arch.lifecycle:reactivestreams:1.1.0"
}
// Adds support for Guava's Optional and ListenableFuture types in Room @Dao queries.
dependencies {
    // Guava support for Room
    implementation "android.arch.persistence.room:guava:1.1.0-alpha3"
}
// Alternative import for lightweight Lifecycles only
dependencies {
    // Lifecycles only (no ViewModel or LiveData)
    implementation "android.arch.lifecycle:runtime:1.1.0"
    annotationProcessor "android.arch.lifecycle:compiler:1.1.0"
}