Otus-Android#1 added PresenterScope

Author: AkashevPavel

app/src/main/java/otus/homework/coroutines/CatsPresenter.kt

@@ -1,14 +1,20 @@
 package otus.homework.coroutines
 
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+
 class CatsPresenter(
-    private val catsService: CatsService
+    private val catsService: CatsService,
+    private val presenterScope: CoroutineScope
 ) {
 
     private var _catsView: ICatsView? = null
 
-    suspend fun onInitComplete() {
-        catsService.getCatFact().also { fact ->
-            _catsView?.populate(fact)
+    fun onInitComplete() {
+        presenterScope.launch {
+            catsService.getCatFact().also { fact ->
+                _catsView?.populate(fact)
+            }
         }
     }
 

app/src/main/java/otus/homework/coroutines/CatsView.kt

@@ -5,9 +5,6 @@ import android.util.AttributeSet
 import android.widget.Button
 import android.widget.TextView
 import androidx.constraintlayout.widget.ConstraintLayout
-import androidx.lifecycle.findViewTreeLifecycleOwner
-import androidx.lifecycle.lifecycleScope
-import kotlinx.coroutines.launch
 
 class CatsView @JvmOverloads constructor(
     context: Context,
@@ -20,9 +17,7 @@ class CatsView @JvmOverloads constructor(
     override fun onFinishInflate() {
         super.onFinishInflate()
         findViewById<Button>(R.id.button).setOnClickListener {
-            findViewTreeLifecycleOwner()?.lifecycleScope?.launch {
-                presenter?.onInitComplete()
-            }
+            presenter?.onInitComplete()
         }
     }
 

app/src/main/java/otus/homework/coroutines/DiContainer.kt

@@ -1,5 +1,8 @@
 package otus.homework.coroutines
 
+import kotlinx.coroutines.CoroutineName
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
 
@@ -13,4 +16,6 @@ class DiContainer {
     }
 
     val service by lazy { retrofit.create(CatsService::class.java) }
+
+    val presenterScope get() = CoroutineScope(CoroutineName("CatsCoroutine") + Dispatchers.Main)
 }

app/src/main/java/otus/homework/coroutines/MainActivity.kt

@@ -1,9 +1,7 @@
 package otus.homework.coroutines
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
-import androidx.lifecycle.lifecycleScope
-import kotlinx.coroutines.launch
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
 
@@ -17,12 +15,10 @@ class MainActivity : AppCompatActivity() {
         val view = layoutInflater.inflate(R.layout.activity_main, null) as CatsView
         setContentView(view)
 
-        catsPresenter = CatsPresenter(diContainer.service)
+        catsPresenter = CatsPresenter(diContainer.service, diContainer.presenterScope)
         view.presenter = catsPresenter
         catsPresenter.attachView(view)
-        lifecycleScope.launch {
-            catsPresenter.onInitComplete()
-        }
+        catsPresenter.onInitComplete()
     }
 
     override fun onStop() {