Hw4/dagger Хубулов Георгий

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

@@ -4,13 +4,15 @@
     package="ru.otus.daggerhomework">
 
     <application
+        android:name=".App"
         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">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

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

@@ -3,4 +3,14 @@ package ru.otus.daggerhomework
 import android.app.Application
 
 class App :Application() {
+    lateinit var appCompoment: ApplicationComponent
+    override fun onCreate() {
+        super.onCreate()
+        appCompoment = DaggerApplicationComponent.factory().newAppComponent(applicationContext)
+    }
+
+}
+
+fun Application.asApp(): App {
+    return this as App
 }

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

@@ -1,4 +1,24 @@
 package ru.otus.daggerhomework
 
+import android.content.Context
+import dagger.BindsInstance
+import dagger.Component
+import javax.inject.Qualifier
+import javax.inject.Singleton
+
+@Component
+@Singleton
 interface ApplicationComponent {
-}
+
+   @ApplicationContext
+   fun provideContext(): Context
+
+   @Component.Factory
+   interface Factory{
+
+      fun newAppComponent(@ApplicationContext @BindsInstance context: Context): ApplicationComponent
+   }
+}
+
+@Qualifier
+annotation class 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

@@ -0,0 +1,23 @@
+package ru.otus.daggerhomework
+
+import dagger.Component
+import javax.inject.Scope
+
+@FragmentScope
+@Component(
+    dependencies = [MainActivityComponent::class]
+)
+interface FragmentProducerComponent {
+    fun inject(fragmentProducer: FragmentProducer)
+
+    companion object {
+        fun getFragmentProducerComponent(mainActivityComponent: MainActivityComponent): FragmentProducerComponent {
+            return DaggerFragmentProducerComponent.builder()
+                .mainActivityComponent(mainActivityComponent).build()
+        }
+    }
+}
+
+@Scope
+@Retention(AnnotationRetention.RUNTIME)
+annotation class FragmentScope

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

@@ -4,28 +4,47 @@ 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.Lifecycle
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.launch
+import javax.inject.Inject
 
 class FragmentReceiver : Fragment() {
-
+    @Inject
+    lateinit var viewModelFactory: ViewModelFactory
+    private val viewModel: ViewModelReceiver by lazy {
+        ViewModelProvider(this, viewModelFactory)[ViewModelReceiver::class.java]
+    }
     private lateinit var frame: View
 
     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)
+        FragmentReceiverComponent.getFragmentReceiverComponent(
+            (requireActivity() as MainActivity).mainActivityComponent).inject(this)
         frame = view.findViewById(R.id.frame)
+        lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.CREATED){
+                viewModel.eventsReader.eventsFlow.collect {
+                    populateColor(it)
+                }
+            }
+        }
     }
 
-    fun populateColor(@ColorInt color: Int) {
+    private fun populateColor(@ColorInt color: Int) {
         frame.setBackgroundColor(color)
     }
 }

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

@@ -0,0 +1,19 @@
+package ru.otus.daggerhomework
+
+import dagger.Component
+
+@FragmentScope
+@Component(
+    dependencies = [MainActivityComponent::class]
+)
+interface FragmentReceiverComponent {
+
+    fun inject(fragmentReceiver: FragmentReceiver)
+
+    companion object {
+        fun getFragmentReceiverComponent(mainActivityComponent: MainActivityComponent): FragmentReceiverComponent {
+            return DaggerFragmentReceiverComponent.builder()
+                .mainActivityComponent(mainActivityComponent).build()
+        }
+    }
+}

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

@@ -4,9 +4,13 @@ import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 
 class MainActivity : AppCompatActivity() {
+    lateinit var mainActivityComponent: MainActivityComponent
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+        mainActivityComponent = DaggerMainActivityComponent.factory().create(this, application.asApp().appCompoment)
+        supportFragmentManager.beginTransaction().add(R.id.container, FragmentReceiver()).commit()
+        supportFragmentManager.beginTransaction().add(R.id.container, FragmentProducer()).commit()
     }
 }

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

@@ -0,0 +1,32 @@
+package ru.otus.daggerhomework
+
+import android.content.Context
+import androidx.lifecycle.ViewModel
+import dagger.BindsInstance
+import dagger.Component
+import javax.inject.Qualifier
+import javax.inject.Scope
+
+@Component(dependencies = [ApplicationComponent::class],
+    modules = [MainActivityModule::class]
+)
+@ActivityScope
+interface MainActivityComponent {
+
+    fun getMap(): Map<Class<*>, ViewModel>
+
+    @Component.Factory
+    interface Factory{
+        fun create(
+          @ActivityContext @BindsInstance context: Context,
+            applicationComponent: ApplicationComponent
+        ): MainActivityComponent
+    }
+}
+
+@Qualifier
+annotation class ActivityContext
+
+@Scope
+@Retention(AnnotationRetention.RUNTIME)
+annotation class ActivityScope

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

@@ -0,0 +1,45 @@
+package ru.otus.daggerhomework
+
+import androidx.lifecycle.ViewModel
+import dagger.Binds
+import dagger.Module
+import dagger.Provides
+import dagger.multibindings.ClassKey
+import dagger.multibindings.IntoMap
+
+@Module
+interface MainActivityModule {
+
+    @Binds
+    @ClassKey(ViewModelProducer::class)
+    @IntoMap
+    @ActivityScope
+    fun provideViewModelProducer(viewModel: ViewModelProducer): ViewModel
+
+    @Binds
+    @ClassKey(ViewModelReceiver::class)
+    @IntoMap
+    @ActivityScope
+    fun provideViewModelReceiver(viewModel: ViewModelReceiver): ViewModel
+
+    @Binds
+    @ActivityScope
+    fun bindColorGenerator(colorGeneratorImpl: ColorGeneratorImpl): ColorGenerator
+
+    @Binds
+    @ActivityScope
+    fun bindEventWriter(eventsWriter: EventsWriterReader): EventsWriter
+
+    @Binds
+    @ActivityScope
+    fun bindEventReader(eventsReader: EventsWriterReader): EventsReader
+
+    companion object{
+
+
+        @Provides
+        @ActivityScope
+        fun provideEventsReaderWriter() = EventsWriterReader()
+
+    }
+}

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

@@ -0,0 +1,15 @@
+package ru.otus.daggerhomework
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import javax.inject.Inject
+
+class ViewModelFactory  @Inject constructor(
+    private val viewModels: Map<Class<*>, @JvmSuppressWildcards ViewModel>
+) : ViewModelProvider.Factory {
+
+     override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        return viewModels[modelClass] as T
+    }
+
+}