2. Оставшиеся два задания

Author: GeorgeBozon

app/build.gradle

@@ -33,11 +33,21 @@ android {
 }
 
 dependencies {
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.4.0"
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.4.0'
+    implementation 'androidx.activity:activity-ktx:1.2.3'
+
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation 'androidx.core:core-ktx:1.6.0'
     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-android:2.42"
+    implementation "com.google.dagger:dagger-android-support:2.42"
+    kapt "com.google.dagger:dagger-android-processor:2.42"
+
     implementation 'com.google.dagger:dagger:2.42'
     kapt 'com.google.dagger:dagger-compiler:2.42'
 }

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
     package="ru.otus.daggerhomework">
 
     <application
+        android:name=".App"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"

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

@@ -4,8 +4,10 @@ import android.content.Context
 import dagger.BindsInstance
 import dagger.Component
 import javax.inject.Qualifier
+import javax.inject.Singleton
 
 @Component
+@Singleton
 interface ApplicationComponent {
 
    @ApplicationContext

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 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/EventsReader.kt

@@ -0,0 +1,7 @@
+package ru.otus.daggerhomework
+
+import kotlinx.coroutines.flow.Flow
+
+interface EventsReader {
+    val eventsFlow: Flow<Int>
+}

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

@@ -0,0 +1,5 @@
+package ru.otus.daggerhomework
+
+interface EventsWriter {
+    fun writeEvent(color: Int)
+}

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

@@ -0,0 +1,17 @@
+package ru.otus.daggerhomework
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import javax.inject.Inject
+
+class EventsWriterReader @Inject constructor() : EventsReader, EventsWriter {
+    private val _eventsFlow = MutableSharedFlow<Int>(replay = 1)
+
+    override val eventsFlow: Flow<Int>
+        get() = _eventsFlow.asSharedFlow()
+
+    override fun writeEvent(color: Int) {
+        _eventsFlow.tryEmit(color)
+    }
+}

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

@@ -6,21 +6,30 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.Button
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.ViewModelProvider
+import javax.inject.Inject
 
 class FragmentProducer : Fragment() {
+    @Inject
+    lateinit var viewModelFactory: ViewModelFactory
 
+    private val viewModel: ViewModelProducer by lazy {
+        ViewModelProvider(this, viewModelFactory)[ViewModelProducer::class.java]
+    }
     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)
+       FragmentProducerComponent.getFragmentProducerComponent(
+          (requireActivity() as MainActivity).mainActivityComponent).inject(this)
         view.findViewById<Button>(R.id.button).setOnClickListener {
-            //отправить результат через livedata в другой фрагмент
+            viewModel.generateColor()
         }
     }
 }

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

@@ -1,19 +1,23 @@
 package ru.otus.daggerhomework
 
 import dagger.Component
-import javax.inject.Singleton
+import javax.inject.Scope
 
-@Singleton
+@FragmentScope
 @Component(
-    modules = [FragmentProducerModule::class],
-    dependencies = [ApplicationComponent::class]
+    dependencies = [MainActivityComponent::class]
 )
 interface FragmentProducerComponent {
+    fun inject(fragmentProducer: FragmentProducer)
 
     companion object {
-        fun getFragmentProducerComponent(applicationComponent: ApplicationComponent): FragmentProducerComponent {
+        fun getFragmentProducerComponent(mainActivityComponent: MainActivityComponent): FragmentProducerComponent {
             return DaggerFragmentProducerComponent.builder()
-                .applicationComponent(applicationComponent).build()
+                .mainActivityComponent(mainActivityComponent).build()
         }
     }
 }
+
+@Scope
+@Retention(AnnotationRetention.RUNTIME)
+annotation class FragmentScope