Rapbong

class MainViewModel : ViewModel() {
...
    fun onClick() {
        val handler = Handler()
        handler.postDelayed(runnable, 1500)

        val asyncTask = BackGroundTask(eventData)
        asyncTask.execute()
    }
}

Rapbong

   val transformationData: LiveData<String> = Transformations.map(eventData)
        {text -> "Transformation Map $text"}

    val transformationData2: LiveData<String> = Transformations.switchMap(eventData){
        input -> getText(input)
    }

    private fun getText(text: String): LiveData<String> {
        val data = MutableLiveData<String>()
        data.value = "Transformation Switch Map $text"

Rapbong

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)
    val binding: ActivityMainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main)
    binding.viewModel = viewModel
    viewModel.eventData.observe(this, Observer<String> { text -> text_view_1.text = text })
}

Rapbong

class MainViewModel : ViewModel() {
    val eventData by lazy {MutableLiveData<String>()}

    private val runnable = Runnable { eventData.value = "Main Thread" }

    fun onClick() {
        val handler = Handler()
        handler.postDelayed(runnable, 1500)
    }
...

Rapbong

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto">
    <data>
        <variable name="viewModel"
                  type="com.example.livedatasample.viewmodel.MainViewModel"/>
    </data>
    <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"

Rapbong

android {
...
    dataBinding {
        enabled true
    }
}
...
dependencies {
...
    implementation "androidx.lifecycle:lifecycle-viewmodel:2.0.0"

Rapbong

public class FrombulationActivity extends Activity {
  @Inject Frombulator frombulator;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    AndroidInjection.inject(this);
  }
}

Rapbong

public class FrombulationActivity extends Activity {
  @Inject Frombulator frombulator;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // DO THIS FIRST. Otherwise frombulator might be null!
    ((SomeApplicationBaseType) getContext().getApplicationContext())
        .getApplicationComponent()
        .newActivityComponentBuilder()

Rapbong

buildscript {
  ext.dagger2_version = '2.18'
}

Rapbong

...
apply plugin: 'kotlin-kapt'
...
dependencies {
  /* Other Gradle settings */
  implementation "com.google.dagger:dagger:$dagger2_version"
  implementation "com.google.dagger:dagger-android:$dagger2_version"
  implementation "com.google.dagger:dagger-android-support:$dagger2_version"
  kapt "com.google.dagger:dagger-compiler:$dagger2_version"
  kapt "com.google.dagger:dagger-android-processor:$dagger2_version"