kirich1409

abstract class Animal {
  public void voice(){
    System.out.println("unknown"); 
  }
}

final class Cat {
  public abstract void voice(){
    System.out.println("meow"); 
  }

kirich1409

abstract class Animal {
  public void voice(){
    System.out.println("unknown"); 
  }
}

final class Cat {
  public abstract void voice(){
    System.out.println("meow"); 
  }

kirich1409

class MainFragment : Fragment() {

    // The dependency isn't final and private
    @Inject
    lateinit var sampleDep: SampleDependency

    override fun onAttach(context: Context) {
        super.onAttach(context)
        // Inject dependencies with Dagger 2
    }

kirich1409

// Описываем зависимости в констркуторе, они сразу final и private
class MainFragment(private val dependency: SampleDependency) : Fragment()

kirich1409

StrictMode.ThreadPolicy.Builder threadPolicyBuilder =
        new StrictMode.ThreadPolicy.Builder()
                .detectDiskReads()
                .detectDiskWrites()
                .detectDiskReads()
                .penaltyLog();

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    threadPolicyBuilder.detectResourceMismatches();
}

kirich1409

kirich1409

fun asyncOperation(): ListenableFuture<Foo> {
    return CallbackToFutureAdapter.getFuture { completer: CallbackToFutureAdapter.Resolver<Foo> ->
        asyncApi.load(object : OnResult {

          override fun onSuccess(foo: Foo) {
              completer.set(foo);
          }

          override fun onError(failure: Failure) {
              completer.setException(failure.exception);

kirich1409

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"

    defaultConfig {
        applicationId "by.kirich1409.sample.jetpackcompose"

kirich1409

@Composable
fun Hello(name: String) = MaterialTheme {
    FlexColumn {
        inflexible { // Item height will be equal content height
            TopAppBar<MenuItem>( // App Bar with title
                title = { Text("Jetpack Compose Sample") }
            )
        }
        expanded(1F) { // occupy whole empty space in the Column
            Center { // Center content

kirich1409

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent { Hello("Jetpack Compose") }
    }
}