Zhuinden

/*
 * Copyright 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

Zhuinden

    public class MyFragment
            extends Fragment {
    
        public MyFragment() {
            super(R.layout.my_fragment);
        }
    
        private int selectedIndex = 0;
    
        private FirstFragment firstFragment;

Zhuinden

import java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import javax.annotation.Nullable;

import okhttp3.MediaType;
import okhttp3.RequestBody;
import okhttp3.ResponseBody;
import retrofit2.Converter;

Zhuinden

class MainActivity : AppCompatActivity() {
    private lateinit var swipeFragment: SwipeFragment
    private lateinit var favoritesFragment: FavoritesFragment
    private lateinit var newsFragment: NewsFragment

    private val fragments: Array<out Fragment> get() = arrayOf(swipeFragment, favoritesFragment, newsFragment)

    private fun selectFragment(selectedFragment: Fragment) {
        var transaction = supportFragmentManager.beginTransaction()
        fragments.forEachIndexed { index, fragment ->

Zhuinden

inline fun <reified T> Query.asLiveData(noinline onError: ((Throwable) -> Unit) = {}): FirestoreQueryLiveData<T> {
    return FirestoreQueryLiveData(this, T::class.java, onError)
}

inline fun <reified T> DocumentReference.asLiveData(noinline onError: ((Throwable) -> Unit) = {}): FirestoreDocumentLiveData<T> {
    return FirestoreDocumentLiveData(this, T::class.java, onError)
}

class FirestoreQueryLiveData<T>(
    private val query: Query,

Zhuinden

import android.animation.LayoutTransition;
import android.content.Context;
import android.graphics.Canvas;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowInsets;
import android.widget.FrameLayout;

Zhuinden

@ActivityRetainedScoped
class NavigationDispatcher @Inject constructor() {
    private val navigationEmitter: EventEmitter<NavigationCommand> = EventEmitter()
    val navigationCommands: EventSource<NavigationCommand> = navigationEmitter

    fun emit(navigationCommand: NavigationCommand) {
        navigationEmitter.emit(navigationCommand)
    }
}

Zhuinden

fun onLoginClicked() {
    val username = // ...
  
    navigationDispatcher.emit { navController ->
        navController.navigate(
            LoggedOutGraphDirections.loggedOutToLoggedIn(username))
        }  
    }
}

Zhuinden

class LoginViewModel @ViewModelInject constructor(
    private val navigationDispatcher: NavigationDispatcher,
    @Assisted private val savedStateHandle: SavedStateHandle
) : ViewModel() {
    fun onRegisterClicked() {
        navigationDispatcher.emit { navController ->
            navController.navigate(R.id.logged_out_to_registration)
        }
    }
}

Zhuinden

@AndroidEntryPoint
class MainActivity : AppCompatActivity() {
    @Inject
    lateinit var navigationDispatcher: NavigationDispatcher

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

        navigationDispatcher.navigationCommands.observe(this) { command ->