AkshayChordiya

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

AkshayChordiya

class SimpleViewModel() : ViewModel() {

    /**
     * The data
     */
    private var data: List<Data>

    init {
        // Load the data over here
        // data = ....

AkshayChordiya

class ContextViewModel(application: Application) : AndroidViewModel(application) {

    /**
     * The data
     */
    private var data: List<Data>

    init {
        // Load the data over here
        // data = ....

AkshayChordiya

class MainActivity : LifecycleActivity() {
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Get the ViewModel instance
        val simpleViewModel = ViewModelProviders.of(this).get(SimpleViewModel::class.java)       
        val data = simpleViewModel.getDataList()
    }

AkshayChordiya

public class ViewModelStore {
    private final HashMap<String, ViewModel> mMap = new HashMap();

    public ViewModelStore() {}

    final void put(String key, ViewModel viewModel) {
        ViewModel oldViewModel = (ViewModel)this.mMap.get(key);
        if(oldViewModel != null) {
            oldViewModel.onCleared();
        }

AkshayChordiya

long startTime = System.currentTimeMillis();
// Do your task
long executionTime = System.currentTimeMillis() - startTime;
System.out.println("Execution Time = " + executionTime + " ms");

AkshayChordiya

 val executionTime = measureTimeMillis {
    // Do your task
}
println("Execution Time = $executionTime ms")

AkshayChordiya

Person person = new Person();
person.setName("Tony Stark");
person.setAge(52);
// More such stuff

AkshayChordiya

with(Person()) {
      name = "Tony Stark"
      age = 52
      // More such stuff
}

AkshayChordiya

person?.let {
      // person object is not null in here
      it.name = "Tony Stark"
}