Add lifecycle events to activity/presenters

Karumi · Jan 30, 2019 · 90fe888 · 90fe888
1 parent 017629a
commit 90fe888
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Showing 8 changed files with 33 additions and 36 deletions.
diff --git a/app/build.gradle b/app/build.gradle
@@ -39,6 +39,7 @@ dependencies {
     implementation "androidx.appcompat:appcompat:1.0.2"
     implementation "androidx.constraintlayout:constraintlayout:2.0.0-alpha3"
     implementation "androidx.recyclerview:recyclerview:1.0.0"
+    implementation "androidx.lifecycle:lifecycle-runtime:2.0.0"
 
     /* Coroutines */
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.1.0"

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/EditSuperHeroPresenter.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/EditSuperHeroPresenter.kt
@@ -1,5 +1,9 @@
 package com.karumi.jetpack.superheroes.ui.presenter
 
+import androidx.lifecycle.Lifecycle.Event.ON_DESTROY
+import androidx.lifecycle.Lifecycle.Event.ON_RESUME
+import androidx.lifecycle.LifecycleObserver
+import androidx.lifecycle.OnLifecycleEvent
 import com.karumi.jetpack.superheroes.common.async
 import com.karumi.jetpack.superheroes.common.weak
 import com.karumi.jetpack.superheroes.domain.model.SuperHero
@@ -14,7 +18,7 @@ class EditSuperHeroPresenter(
     view: View,
     private val getSuperHeroById: GetSuperHeroById,
     private val saveSuperHero: SaveSuperHero
-) : CoroutineScope by MainScope() {
+) : LifecycleObserver, CoroutineScope by MainScope() {
 
     private val view: View? by weak(view)
     private lateinit var id: String
@@ -28,11 +32,13 @@ class EditSuperHeroPresenter(
         }
     }
 
+    @OnLifecycleEvent(ON_RESUME)
     fun onResume() {
         view?.showLoading()
         refreshSuperHero()
     }
 
+    @OnLifecycleEvent(ON_DESTROY)
     fun onDestroy() {
         cancel()
     }

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/SuperHeroDetailPresenter.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/SuperHeroDetailPresenter.kt
@@ -1,5 +1,9 @@
 package com.karumi.jetpack.superheroes.ui.presenter
 
+import androidx.lifecycle.Lifecycle.Event.ON_DESTROY
+import androidx.lifecycle.Lifecycle.Event.ON_RESUME
+import androidx.lifecycle.LifecycleObserver
+import androidx.lifecycle.OnLifecycleEvent
 import com.karumi.jetpack.superheroes.common.async
 import com.karumi.jetpack.superheroes.common.weak
 import com.karumi.jetpack.superheroes.domain.model.SuperHero
@@ -12,7 +16,7 @@ import kotlinx.coroutines.launch
 class SuperHeroDetailPresenter(
     view: View,
     private val getSuperHeroById: GetSuperHeroById
-) : CoroutineScope by MainScope() {
+) : LifecycleObserver, CoroutineScope by MainScope() {
 
     private val view: View? by weak(view)
 
@@ -26,11 +30,13 @@ class SuperHeroDetailPresenter(
         }
     }
 
+    @OnLifecycleEvent(ON_RESUME)
     fun onResume() {
         view?.showLoading()
         refreshSuperHero()
     }
 
+    @OnLifecycleEvent(ON_DESTROY)
     fun onDestroy() {
         cancel()
     }

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/SuperHeroesPresenter.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/presenter/SuperHeroesPresenter.kt
@@ -1,5 +1,9 @@
 package com.karumi.jetpack.superheroes.ui.presenter
 
+import androidx.lifecycle.Lifecycle.Event.ON_DESTROY
+import androidx.lifecycle.Lifecycle.Event.ON_RESUME
+import androidx.lifecycle.LifecycleObserver
+import androidx.lifecycle.OnLifecycleEvent
 import com.karumi.jetpack.superheroes.common.async
 import com.karumi.jetpack.superheroes.common.weak
 import com.karumi.jetpack.superheroes.domain.model.SuperHero
@@ -12,17 +16,19 @@ import kotlinx.coroutines.launch
 class SuperHeroesPresenter(
     view: View,
     private val getSuperHeroes: GetSuperHeroes
-) : CoroutineScope by MainScope() {
+) : LifecycleObserver, CoroutineScope by MainScope() {
 
     private val view: View? by weak(
         view
     )
 
+    @OnLifecycleEvent(ON_RESUME)
     fun onResume() {
         view?.showLoading()
         refreshSuperHeroes()
     }
 
+    @OnLifecycleEvent(ON_DESTROY)
     fun onDestroy() {
         cancel()
     }

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/BaseActivity.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/BaseActivity.kt
@@ -4,6 +4,7 @@ import android.content.Intent
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
+import androidx.lifecycle.LifecycleObserver
 import org.kodein.di.Kodein
 import org.kodein.di.KodeinAware
 import org.kodein.di.android.closestKodein
@@ -15,16 +16,23 @@ abstract class BaseActivity : AppCompatActivity(), KodeinAware {
         extend(appKodein)
         import(activityModules)
     }
+    abstract val presenter: LifecycleObserver
     abstract val layoutId: Int
     abstract val toolbarView: Toolbar
     abstract val activityModules: Kodein.Module
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        lifecycle.addObserver(presenter)
         setContentView(layoutId)
         setSupportActionBar(toolbarView)
         preparePresenter(intent)
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        lifecycle.removeObserver(presenter)
+    }
+
     open fun preparePresenter(intent: Intent?) {}
 }
diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/EditSuperHeroActivity.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/EditSuperHeroActivity.kt
@@ -28,7 +28,7 @@ class EditSuperHeroActivity : BaseActivity(), EditSuperHeroPresenter.View {
         }
     }
 
-    private val presenter: EditSuperHeroPresenter by instance()
+    override val presenter: EditSuperHeroPresenter by instance()
     override val layoutId = R.layout.edit_super_hero_activity
     override val toolbarView: Toolbar
         get() = toolbar
@@ -46,16 +46,6 @@ class EditSuperHeroActivity : BaseActivity(), EditSuperHeroPresenter.View {
         }
     }
 
-    override fun onResume() {
-        super.onResume()
-        presenter.onResume()
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDestroy()
-    }
-
     override fun preparePresenter(intent: Intent?) {
         title = superHeroId
         presenter.preparePresenter(superHeroId)

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/MainActivity.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/MainActivity.kt
@@ -17,7 +17,7 @@ import org.kodein.di.erased.provider
 
 class MainActivity : BaseActivity(), SuperHeroesPresenter.View {
 
-    private val presenter: SuperHeroesPresenter by instance()
+    override val presenter: SuperHeroesPresenter by instance()
     private lateinit var adapter: SuperHeroesAdapter
     override val layoutId: Int = R.layout.main_activity
     override val toolbarView: Toolbar
@@ -29,16 +29,6 @@ class MainActivity : BaseActivity(), SuperHeroesPresenter.View {
         initializeRecyclerView()
     }
 
-    override fun onResume() {
-        super.onResume()
-        presenter.onResume()
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDestroy()
-    }
-
     private fun initializeAdapter() {
         adapter = SuperHeroesAdapter(presenter)
     }

diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/SuperHeroDetailActivity.kt b/app/src/main/java/com/karumi/jetpack/superheroes/ui/view/SuperHeroDetailActivity.kt
@@ -28,7 +28,7 @@ class SuperHeroDetailActivity : BaseActivity(), SuperHeroDetailPresenter.View {
         }
     }
 
-    private val presenter: SuperHeroDetailPresenter by instance()
+    override val presenter: SuperHeroDetailPresenter by instance()
     override val layoutId: Int = R.layout.super_hero_detail_activity
     override val toolbarView: Toolbar
         get() = toolbar
@@ -40,16 +40,6 @@ class SuperHeroDetailActivity : BaseActivity(), SuperHeroDetailPresenter.View {
         edit_super_hero.setOnClickListener { presenter.onEditSelected() }
     }
 
-    override fun onResume() {
-        super.onResume()
-        presenter.onResume()
-    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDestroy()
-    }
-
     override fun preparePresenter(intent: Intent?) {
         title = superHeroId
         presenter.preparePresenter(superHeroId)