HW done

app/build.gradle

@@ -1,16 +1,16 @@
 plugins {
     id 'com.android.application'
-    id 'kotlin-android'
-    id 'kotlin-kapt'
+    id 'org.jetbrains.kotlin.android'
+    id 'org.jetbrains.kotlin.kapt'
 }
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion 34
 
     defaultConfig {
         applicationId "ru.otus.daggerhomework"
         minSdkVersion 23
-        targetSdkVersion 31
+        targetSdkVersion 34
         versionCode 1
         versionName "1.0"
 
@@ -30,6 +30,7 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    namespace 'ru.otus.daggerhomework'
 }
 
 dependencies {
@@ -38,6 +39,11 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.3.1'
     implementation 'com.google.android.material:material:1.4.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
-    implementation 'com.google.dagger:dagger:2.42'
-    kapt 'com.google.dagger:dagger-compiler:2.42'
+    implementation 'com.google.dagger:dagger:2.48'
+    kapt 'com.google.dagger:dagger-compiler:2.48'
+
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2'
+    implementation 'androidx.fragment:fragment-ktx:1.6.2'
 }

app/src/main/AndroidManifest.xml

@@ -1,16 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    package="ru.otus.daggerhomework">
+    xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.DaggerHomework">
-        <activity android:name=".MainActivity">
+        android:theme="@style/Theme.DaggerHomework"
+        android:name=".di.app.App">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/ru/otus/daggerhomework/ColorGenerator.kt

@@ -2,16 +2,16 @@ package ru.otus.daggerhomework
 
 import android.graphics.Color
 import androidx.annotation.ColorInt
-import androidx.annotation.ColorRes
-import java.util.*
+import java.util.Random
+import javax.inject.Inject
 
 interface ColorGenerator {
 
     @ColorInt
     fun generateColor(): Int
 }
 
-class ColorGeneratorImpl : ColorGenerator {
+class ColorGeneratorImpl @Inject constructor() : ColorGenerator {
 
     override fun generateColor(): Int {
         val rnd = Random()

app/src/main/java/ru/otus/daggerhomework/FragmentProducer.kt

@@ -1,26 +1,49 @@
 package ru.otus.daggerhomework
 
+import android.content.Context
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Button
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import ru.otus.daggerhomework.di.activity.ActivityComponentHolder
+import ru.otus.daggerhomework.di.app.appComponent
+import ru.otus.daggerhomework.di.fragments.FragmentProducerComponent
+import ru.otus.daggerhomework.di.fragments.ViewModelFactory
+import javax.inject.Inject
 
 class FragmentProducer : Fragment() {
 
+
+    @Inject
+    lateinit var vmFactory: ViewModelFactory
+    private val viewModel: ViewModelProducer by lazy {
+        ViewModelProvider(this, vmFactory)[ViewModelProducer::class.java]
+    }
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        FragmentProducerComponent
+            .getFragComponent(
+                ActivityComponentHolder
+                    .getActivityComponent(context.appComponent, requireActivity())
+            ).inject(this)
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        return inflater.inflate(R.layout.fragment_a, container, true)
+        return inflater.inflate(R.layout.fragment_a, container, false)
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         view.findViewById<Button>(R.id.button).setOnClickListener {
-            //отправить результат через livedata в другой фрагмент
+            viewModel.generateColor()
         }
     }
 }

app/src/main/java/ru/otus/daggerhomework/FragmentReceiver.kt

@@ -1,31 +1,73 @@
 package ru.otus.daggerhomework
 
+import android.content.Context
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.Button
 import androidx.annotation.ColorInt
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import ru.otus.daggerhomework.di.activity.ActivityComponentHolder
+import ru.otus.daggerhomework.di.app.appComponent
+import ru.otus.daggerhomework.di.fragments.FragmentReceiverComponent
+import ru.otus.daggerhomework.di.fragments.ViewModelFactory
+import javax.inject.Inject
 
 class FragmentReceiver : Fragment() {
 
     private lateinit var frame: View
 
+    @Inject
+    lateinit var vmFactory: ViewModelFactory
+    private val viewModel: ViewModelReceiver  by lazy {
+        ViewModelProvider(this, vmFactory)[ViewModelReceiver::class.java]
+    }
+
+    private var currentColor: Int = 0xFFFFFF
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        FragmentReceiverComponent
+            .getFragComponent(
+                ActivityComponentHolder
+                    .getActivityComponent(context.appComponent, requireActivity())
+            ).inject(this)
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        return inflater.inflate(R.layout.fragment_b, container, true)
+        return inflater.inflate(R.layout.fragment_b, container, false)
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         frame = view.findViewById(R.id.frame)
+
+        viewModel.observeColors(::populateColor)
     }
 
-    fun populateColor(@ColorInt color: Int) {
+    private fun populateColor(@ColorInt color: Int) {
+        currentColor = color
         frame.setBackgroundColor(color)
     }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        outState.putInt(COLOR_KEY, currentColor)
+        super.onSaveInstanceState(outState)
+    }
+
+    override fun onViewStateRestored(savedInstanceState: Bundle?) {
+        super.onViewStateRestored(savedInstanceState)
+        if (savedInstanceState != null) {
+            populateColor(savedInstanceState.getInt(COLOR_KEY, currentColor))
+        }
+    }
+
+    companion object {
+        private const val COLOR_KEY = "color"
+    }
 }

app/src/main/java/ru/otus/daggerhomework/LocalEvent.kt

@@ -0,0 +1,12 @@
+package ru.otus.daggerhomework
+
+import androidx.annotation.ColorInt
+
+sealed interface LocalEvent {
+    data class ColorData(
+        @ColorInt val color: Int
+    ): LocalEvent
+    data class Error(
+        val e: Exception
+    ): LocalEvent
+}

app/src/main/java/ru/otus/daggerhomework/MainActivity.kt

@@ -1,12 +1,23 @@
 package ru.otus.daggerhomework
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import ru.otus.daggerhomework.di.activity.ActivityComponentHolder
+import ru.otus.daggerhomework.di.app.appComponent
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+//        supportFragmentManager.beginTransaction()
+//            .add(R.id.fragment_producer_container, FragmentProducer())
+//            .add(R.id.fragment_receiver_container, FragmentReceiver())
+//            .commit()
+
+        ActivityComponentHolder
+            .getActivityComponent(application.appComponent, this)
+            .inject(this)
     }
 }

app/src/main/java/ru/otus/daggerhomework/ViewModelProducer.kt

@@ -3,14 +3,38 @@ package ru.otus.daggerhomework
 import android.content.Context
 import android.widget.Toast
 import androidx.fragment.app.FragmentActivity
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.launch
+import ru.otus.daggerhomework.di.activity.ActivityContextQualifier
+import java.lang.ref.WeakReference
+import javax.inject.Inject
 
-class ViewModelProducer(
+class ViewModelProducer @Inject constructor(
+    private val observer: Channel<LocalEvent>,
     private val colorGenerator: ColorGenerator,
+    @ActivityContextQualifier
+    activityContext: Context
+) : ViewModel() {
+
+    private val weakContextRef = WeakReference(activityContext)
     private val context: Context
-) {
+        get() = weakContextRef.get()!!
 
     fun generateColor() {
         if (context !is FragmentActivity) throw RuntimeException("Здесь нужен контекст активити")
         Toast.makeText(context, "Color sent", Toast.LENGTH_LONG).show()
+
+        viewModelScope.launch {
+            try {
+                observer.send(LocalEvent.ColorData(colorGenerator.generateColor()))
+            } catch (e: CancellationException) {
+                throw e
+            } catch (e: Exception) {
+                observer.send(LocalEvent.Error(e))
+            }
+        }
     }
 }

app/src/main/java/ru/otus/daggerhomework/ViewModelReceiver.kt

@@ -3,13 +3,36 @@ package ru.otus.daggerhomework
 import android.app.Application
 import android.content.Context
 import android.widget.Toast
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.flow.receiveAsFlow
+import kotlinx.coroutines.launch
+import ru.otus.daggerhomework.di.app.ApplicationContextQualifier
+import javax.inject.Inject
 
-class ViewModelReceiver(
+class ViewModelReceiver @Inject constructor(
+    private val observer: Channel<LocalEvent>,
+    @ApplicationContextQualifier
     private val context: Context
-) {
+) : ViewModel() {
 
-    fun observeColors() {
+    fun observeColors(populate: (color: Int) -> Unit) {
         if (context !is Application) throw RuntimeException("Здесь нужен контекст апликейшена")
         Toast.makeText(context, "Color received", Toast.LENGTH_LONG).show()
+
+        viewModelScope.launch {
+            observer.receiveAsFlow().collect { event ->
+                when (event) {
+                    is LocalEvent.ColorData -> {
+                        populate(event.color)
+                    }
+
+                    is LocalEvent.Error -> {
+                        Toast.makeText(context, "Error", Toast.LENGTH_LONG).show()
+                    }
+                }
+            }
+        }
     }
 }