rachitmishra

Event Observer

inline fun <T> LiveData<Event<T>>.observeEvent(owner: LifecycleOwner, crossinline onEventUnhandledContent: (T) -> Unit) {
    observe(owner, Observer { it?.getContentIfNotHandled()?.let(onEventUnhandledContent) })
}

rachitmishra

Keybase proof

I hereby claim:

• I am rachitmishra on github.
• I am rachitmishra (https://keybase.io/rachitmishra) on keybase.
• I have a public key whose fingerprint is 1EED 1186 5734 CC4B 3615 E8BD 6DEA 2BC5 9B4B BA4F

To claim this, I am signing this object:

rachitmishra

Dependency Injection

Inversion of Control Containers and the Dependency Injection pattern

https://www.martinfowler.com/articles/injection.html

A beginners guide to Dependency Injection

http://www.theserverside.com/news/1321158/A-beginners-guide-to-Dependency-Injection

rachitmishra

/**
* Using `@Binds` to provide concrete implementations
*/

@Module
abstract class ComputerBinding(private val memorySize: Int,
                               private val vMemorySize: Int) {
    @Binds
    abstract fun providesMotherboard(gigabyte: Gigabyte): Motherboard
}

rachitmishra

/**
* Activity handling it's injection
*/

class MyActivity {		
		
   @Inject		
   lateinit var computer: Computer // Requesting the dependency				

   override fun onCreate(savedInstanceState: Bundle?) {		

rachitmishra

/**
* Declaring application with `ComputerComponent` instance
*/

class MyApplication: Application() {

    lateinit var computerComponent: ComputerComponent // Declaring our component instance

    @Override
    public void onCreate() {

rachitmishra

/**
* Building `ComputerComponent` and getting a dependency
*/

class ComputerApp {
    @Inject lateinit var computer: Computer
}

fun main(args: Array<String>) {
    val computerComponent = DaggerComputerComponent

rachitmishra

/**
* An activity implementing `HasSupportFragmentInjector` and with an instance of `DispatchingAndroidInjector<Fragment>`
* for fragment injection.
*/

class HomeActivity : HasSupportFragmentInjector {

    @Inject
    lateinit var mAndroidInjector: DispatchingAndroidInjector<Fragment>
  

rachitmishra

/**
* Fragment with dependency `ConnectionUtils` 
*/

class HomeFragment: Fragment() {
   
    @Inject
    lateinit var connectionUtils: ConnectionUtils // Requesting our dependency
  
    override fun onAttach(context: Context?) {

rachitmishra

/**
* HomeViewModel with `@Inject`able constructor
*/

class HomeViewModel @Inject constructor(private val resources: Resources,
                                        private val preferenceUtils: PreferenceUtils,
                                        private val defineRepository: DefineRepository) {}