diousk

@Singleton
class SessionManager @Inject constructor(
    private val sessionComponentFactory: SessionComponent.Factory
) {
    var sessionComponent: SessionComponent? = null
        private set

    fun isUserLoggedIn() = sessionComponent != null

    fun logout() {

diousk

class SettingActivity : DaggerSessionActivity() {
    @Inject
    lateinit var sessionManager: SessionManager

    @Inject
    lateinit var sessionPrefs: SessionPrefs

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_setting)

diousk

class MainActivity : DaggerSessionActivity() {

    @Inject
    lateinit var sessionPrefs: SessionPrefs

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

        Timber.d("main sessionPrefs = $sessionPrefs")

diousk

class LoginActivity : DaggerAppCompatActivity() {

    @Inject lateinit var sessionManager: SessionManager

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_login)
        Timber.d("sessionManager = $sessionManager")

        goMain.setOnClickListener {

diousk

abstract class DaggerSessionActivity : AppCompatActivity(), HasAndroidInjector {
    @Inject
    lateinit var androidInjector: DispatchingAndroidInjector<Any>

    override fun onCreate(savedInstanceState: Bundle?) {
        val sessionManager = (application as App).appComponent.sessionManager()
        sessionManager.sessionComponent?.injector()?.inject(this)
        super.onCreate(savedInstanceState)
    }

diousk

@SessionScope
@Subcomponent(modules = [SessionActivityBuilder::class, SessionModule::class])
interface SessionComponent {
    @Subcomponent.Factory
    interface Factory {
        fun create(): SessionComponent
    }
    
    fun injector(): DispatchingAndroidInjector<Any>
}

diousk

@Module
abstract class ActivityBuilder {
 @ContributesAndroidInjector
 abstract fun bindLoginActivity(): LoginActivity
}

@Module(subcomponents = [SessionComponent::class])
abstract class AppSubcomponents

diousk

@Singleton
@Component(
 modules = [
 AndroidSupportInjectionModule::class,
 ActivityBuilder::class,
 AppSubcomponents::class,
 AppModule::class
 ]
)
interface AppComponent : AndroidInjector<App> {

diousk

@Module
abstract class ActivityBuilder {
 @PerActivity
 @ContributesAndroidInjector(modules = [SomeModule::class])
 abstract fun bindSomeActivity(): SomeActivity
}

@Module
abstract class SomeModule {
 @Provides

diousk

suspend fun Fragment.awaitKeyboardHidden() = suspendCancellableCoroutine<Unit> { cont ->
    if (!KeyboardVisibilityEvent.isKeyboardVisible(activity)) {
        cont.resume(Unit)
        return@suspendCancellableCoroutine
    }

    var unRegistrar: Unregistrar? = null
    unRegistrar = KeyboardVisibilityEvent.registerEventListener(activity) { open ->
        if (!open) { 
            // keyboard dismissed, time to resume coroutine