Tidied up usage of GlobalScope to the profit of AndroidX's lifecycle coroutine scopes.

app/build.gradle.kts

@@ -103,6 +103,7 @@ dependencies {
 
   implementation("androidx.appcompat:appcompat:1.1.0")
   implementation("androidx.core:core-ktx:1.5.0-alpha01")
+  implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.3.0-alpha05")
   implementation("androidx.coordinatorlayout:coordinatorlayout:1.1.0")
   implementation("androidx.preference:preference:1.1.1")
   implementation("androidx.recyclerview:recyclerview:1.1.0")

app/src/main/AndroidManifest.xml

@@ -17,10 +17,6 @@
     android:theme="@style/AppTheme"
     android:usesCleartextTraffic="true">
 
-    <!-- <meta-data
-      android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
-      android:value="com.google.android.exoplayer2.ext.cast.DefaultCastOptionsProvider"/> -->
-
     <activity
       android:name="com.github.apognu.otter.activities.SplashActivity"
       android:launchMode="singleInstance"

app/src/main/java/com/github/apognu/otter/activities/DownloadsActivity.kt

@@ -1,19 +1,21 @@
 package com.github.apognu.otter.activities
 
 import android.os.Bundle
-import kotlinx.coroutines.flow.collect
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.apognu.otter.Otter
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.DownloadsAdapter
-import com.github.apognu.otter.utils.*
+import com.github.apognu.otter.utils.Event
+import com.github.apognu.otter.utils.EventBus
+import com.github.apognu.otter.utils.getMetadata
 import com.google.android.exoplayer2.offline.Download
 import kotlinx.android.synthetic.main.activity_downloads.*
-import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.Dispatchers.Default
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
@@ -34,7 +36,7 @@ class DownloadsActivity : AppCompatActivity() {
       downloads.adapter = it
     }
 
-    GlobalScope.launch(IO) {
+    lifecycleScope.launch(Default) {
       while (true) {
         delay(1000)
         refreshProgress()
@@ -45,7 +47,7 @@ class DownloadsActivity : AppCompatActivity() {
   override fun onResume() {
     super.onResume()
 
-    GlobalScope.launch(IO) {
+    lifecycleScope.launch(Default) {
       EventBus.get().collect { event ->
         if (event is Event.DownloadChanged) {
           refreshTrack(event.download)
@@ -57,7 +59,7 @@ class DownloadsActivity : AppCompatActivity() {
   }
 
   private fun refresh() {
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       val cursor = Otter.get().exoDownloadManager.downloadIndex.getDownloads()
 
       adapter.downloads.clear()

app/src/main/java/com/github/apognu/otter/activities/LoginActivity.kt

@@ -5,6 +5,7 @@ import android.net.Uri
 import android.os.Bundle
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import com.github.apognu.otter.R
 import com.github.apognu.otter.fragments.LoginDialog
 import com.github.apognu.otter.utils.AppContext
@@ -17,7 +18,6 @@ import com.google.gson.Gson
 import com.preference.PowerPreference
 import kotlinx.android.synthetic.main.activity_login.*
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 
 data class FwCredentials(val token: String, val non_field_errors: List<String>?)
@@ -89,7 +89,7 @@ class LoginActivity : AppCompatActivity() {
       show(supportFragmentManager, "LoginDialog")
     }
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       try {
         val (_, response, result) = Fuel.post("$hostname/api/v1/token/", body)
           .awaitObjectResponseResult(gsonDeserializerOf(FwCredentials::class.java))
@@ -146,7 +146,7 @@ class LoginActivity : AppCompatActivity() {
       show(supportFragmentManager, "LoginDialog")
     }
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       try {
         val (_, _, result) = Fuel.get("$hostname/api/v1/tracks/")
           .awaitObjectResponseResult(gsonDeserializerOf(FwCredentials::class.java))

app/src/main/java/com/github/apognu/otter/activities/MainActivity.kt

@@ -5,7 +5,6 @@ import android.animation.AnimatorListenerAdapter
 import android.animation.ObjectAnimator
 import android.annotation.SuppressLint
 import android.content.Intent
-import android.content.res.Configuration
 import android.graphics.Bitmap
 import android.os.Bundle
 import android.util.DisplayMetrics
@@ -19,6 +18,7 @@ import androidx.core.graphics.drawable.toDrawable
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
+import androidx.lifecycle.lifecycleScope
 import com.github.apognu.otter.R
 import com.github.apognu.otter.fragments.*
 import com.github.apognu.otter.playback.MediaControlsManager
@@ -38,11 +38,9 @@ import com.squareup.picasso.Picasso
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.activity_main.*
 import kotlinx.android.synthetic.main.partial_now_playing.*
-import kotlinx.android.synthetic.main.row_download.*
+import kotlinx.coroutines.Dispatchers.Default
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -55,10 +53,6 @@ class MainActivity : AppCompatActivity() {
   private val favoriteRepository = FavoritesRepository(this)
   private val favoriteCheckRepository = FavoritedRepository(this)
 
-  private var eventBus: Job? = null
-  private var commandBus: Job? = null
-  private var progressBus: Job? = null
-
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
 
@@ -76,22 +70,18 @@ class MainActivity : AppCompatActivity() {
       .replace(R.id.container, BrowseFragment())
       .commit()
 
-    CommandBus.send(Command.RefreshService)
+    watchEventBus()
   }
 
   override fun onResume() {
     super.onResume()
 
-    if (eventBus == null) {
-      watchEventBus()
-    }
-
-    CommandBus.send(Command.RefreshService)
-
     startService(Intent(this, PlayerService::class.java))
     DownloadService.start(this, PinService::class.java)
 
-    GlobalScope.launch(IO) {
+    CommandBus.send(Command.RefreshService)
+
+    lifecycleScope.launch(IO) {
       Userinfo.get()
     }
 
@@ -132,19 +122,6 @@ class MainActivity : AppCompatActivity() {
     }
   }
 
-  override fun onPause() {
-    super.onPause()
-
-    eventBus?.cancel()
-    eventBus = null
-
-    commandBus?.cancel()
-    commandBus = null
-
-    progressBus?.cancel()
-    progressBus = null
-  }
-
   override fun onBackPressed() {
     if (now_playing.isOpened()) {
       now_playing.close()
@@ -157,8 +134,6 @@ class MainActivity : AppCompatActivity() {
   override fun onCreateOptionsMenu(menu: Menu?): Boolean {
     menuInflater.inflate(R.menu.toolbar, menu)
 
-    // CastButtonFactory.setUpMediaRouteButton(this, menu, R.id.cast)
-
     menu?.findItem(R.id.nav_only_my_music)?.isChecked = Settings.getScope() == "me"
 
     return true
@@ -210,10 +185,6 @@ class MainActivity : AppCompatActivity() {
     }
   }
 
-  override fun onConfigurationChanged(newConfig: Configuration) {
-    super.onConfigurationChanged(newConfig)
-  }
-
   private fun launchFragment(fragment: Fragment) {
     supportFragmentManager.fragments.lastOrNull()?.also { oldFragment ->
       oldFragment.enterTransition = null
@@ -237,7 +208,7 @@ class MainActivity : AppCompatActivity() {
 
   @SuppressLint("NewApi")
   private fun watchEventBus() {
-    eventBus = GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       EventBus.get().collect { message ->
         when (message) {
           is Event.LogOut -> {
@@ -312,7 +283,7 @@ class MainActivity : AppCompatActivity() {
       }
     }
 
-    commandBus = GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refreshCurrentTrack(command.track)
@@ -320,7 +291,7 @@ class MainActivity : AppCompatActivity() {
       }
     }
 
-    progressBus = GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       ProgressBus.get().collect { (current, duration, percent) ->
         now_playing_progress.progress = percent
         now_playing_details_progress.progress = percent
@@ -384,7 +355,7 @@ class MainActivity : AppCompatActivity() {
       }
 
       if (now_playing_details_cover == null) {
-        GlobalScope.launch(IO) {
+        lifecycleScope.launch(Default) {
           val width = DisplayMetrics().apply {
             windowManager.defaultDisplay.getMetrics(this)
           }.widthPixels
@@ -437,8 +408,8 @@ class MainActivity : AppCompatActivity() {
       }
 
       now_playing_details_favorite?.let { now_playing_details_favorite ->
-        favoriteCheckRepository.fetch().untilNetwork(IO) { favorites, _, _ ->
-          GlobalScope.launch(Main) {
+        favoriteCheckRepository.fetch().untilNetwork(lifecycleScope, IO) { favorites, _, _ ->
+          lifecycleScope.launch(Main) {
             track.favorite = favorites.contains(track.id)
 
             when (track.favorite) {
@@ -507,7 +478,7 @@ class MainActivity : AppCompatActivity() {
 
   private fun incrementListenCount(track: Track?) {
     track?.let {
-      GlobalScope.launch(IO) {
+      lifecycleScope.launch(IO) {
         try {
           Fuel
             .post(mustNormalizeUrl("/api/v1/history/listenings/"))

app/src/main/java/com/github/apognu/otter/activities/SearchActivity.kt

@@ -3,6 +3,7 @@ package com.github.apognu.otter.activities
 import android.os.Bundle
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.SearchAdapter
@@ -66,21 +67,21 @@ class SearchActivity : AppCompatActivity() {
           adapter.tracks.clear()
           adapter.notifyDataSetChanged()
 
-          artistsRepository.fetch(Repository.Origin.Network.origin).untilNetwork { artists, _, _ ->
+          artistsRepository.fetch(Repository.Origin.Network.origin).untilNetwork(lifecycleScope) { artists, _, _ ->
             done++
 
             adapter.artists.addAll(artists)
             refresh()
           }
 
-          albumsRepository.fetch(Repository.Origin.Network.origin).untilNetwork { albums, _, _ ->
+          albumsRepository.fetch(Repository.Origin.Network.origin).untilNetwork(lifecycleScope) { albums, _, _ ->
             done++
 
             adapter.albums.addAll(albums)
             refresh()
           }
 
-          tracksRepository.fetch(Repository.Origin.Network.origin).untilNetwork { tracks, _, _ ->
+          tracksRepository.fetch(Repository.Origin.Network.origin).untilNetwork(lifecycleScope) { tracks, _, _ ->
             done++
 
             adapter.tracks.addAll(tracks)

app/src/main/java/com/github/apognu/otter/adapters/RadiosAdapter.kt

@@ -7,17 +7,20 @@ import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.fragments.FunkwhaleAdapter
-import com.github.apognu.otter.utils.*
+import com.github.apognu.otter.utils.AppContext
+import com.github.apognu.otter.utils.Event
+import com.github.apognu.otter.utils.EventBus
+import com.github.apognu.otter.utils.Radio
 import com.github.apognu.otter.views.LoadingImageView
 import com.preference.PowerPreference
 import kotlinx.android.synthetic.main.row_radio.view.*
 import kotlinx.android.synthetic.main.row_radio_header.view.*
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
-class RadiosAdapter(val context: Context?, private val listener: OnRadioClickListener) : FunkwhaleAdapter<Radio, RadiosAdapter.ViewHolder>() {
+class RadiosAdapter(val context: Context?, val scope: CoroutineScope, private val listener: OnRadioClickListener) : FunkwhaleAdapter<Radio, RadiosAdapter.ViewHolder>() {
   interface OnRadioClickListener {
     fun onClick(holder: ViewHolder, radio: Radio)
   }
@@ -139,7 +142,7 @@ class RadiosAdapter(val context: Context?, private val listener: OnRadioClickLis
 
         art.setColorFilter(context.getColor(R.color.controlForeground))
 
-        GlobalScope.launch(Main) {
+        scope.launch(Main) {
           EventBus.get().collect { message ->
             when (message) {
               is Event.RadioStarted -> {

app/src/main/java/com/github/apognu/otter/fragments/AlbumsFragment.kt

@@ -8,6 +8,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.os.bundleOf
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import androidx.swiperefreshlayout.widget.CircularProgressDrawable
 import androidx.transition.Fade
@@ -24,7 +25,6 @@ import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.fragment_albums.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.toList
 import kotlinx.coroutines.launch
@@ -126,7 +126,7 @@ class AlbumsFragment : FunkwhaleFragment<Album, AlbumsAdapter>() {
       play.icon = loader
       play.isClickable = false
 
-      GlobalScope.launch(IO) {
+      lifecycleScope.launch(IO) {
         artistTracksRepository.fetch(Repository.Origin.Network.origin)
           .map { it.data }
           .toList()

app/src/main/java/com/github/apognu/otter/fragments/FavoritesFragment.kt

@@ -1,6 +1,7 @@
 package com.github.apognu.otter.fragments
 
 import android.os.Bundle
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.FavoritesAdapter
@@ -11,7 +12,6 @@ import com.google.android.exoplayer2.offline.Download
 import kotlinx.android.synthetic.main.fragment_favorites.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -32,7 +32,7 @@ class FavoritesFragment : FunkwhaleFragment<Track, FavoritesAdapter>() {
   override fun onResume() {
     super.onResume()
 
-    GlobalScope.launch(IO) {
+    lifecycleScope.launch(IO) {
       RequestBus.send(Request.GetCurrentTrack).wait<Response.CurrentTrack>()?.let { response ->
         withContext(Main) {
           adapter.currentTrack = response.track
@@ -49,7 +49,7 @@ class FavoritesFragment : FunkwhaleFragment<Track, FavoritesAdapter>() {
   }
 
   private fun watchEventBus() {
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       EventBus.get().collect { message ->
         when (message) {
           is Event.DownloadChanged -> refreshDownloadedTrack(message.download)
@@ -57,7 +57,7 @@ class FavoritesFragment : FunkwhaleFragment<Track, FavoritesAdapter>() {
       }
     }
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refreshCurrentTrack(command.track)

app/src/main/java/com/github/apognu/otter/fragments/FunkwhaleFragment.kt

@@ -5,16 +5,19 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.repositories.HttpUpstream
 import com.github.apognu.otter.repositories.Repository
-import com.github.apognu.otter.utils.*
+import com.github.apognu.otter.utils.Cache
+import com.github.apognu.otter.utils.Event
+import com.github.apognu.otter.utils.EventBus
+import com.github.apognu.otter.utils.untilNetwork
 import com.google.gson.Gson
 import kotlinx.android.synthetic.main.fragment_artists.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
@@ -70,7 +73,7 @@ abstract class FunkwhaleFragment<D : Any, A : FunkwhaleAdapter<D, *>> : Fragment
     }
 
     if (listener == null) {
-      listener = GlobalScope.launch(IO) {
+      listener = lifecycleScope.launch(IO) {
         EventBus.get().collect { event ->
           if (event is Event.ListingsChanged) {
             withContext(Main) {
@@ -92,8 +95,8 @@ abstract class FunkwhaleFragment<D : Any, A : FunkwhaleAdapter<D, *>> : Fragment
       swiper?.isRefreshing = true
     }
 
-    repository.fetch(upstreams, size).untilNetwork(IO) { data, isCache, hasMore ->
-      GlobalScope.launch(Main) {
+    repository.fetch(upstreams, size).untilNetwork(lifecycleScope, IO) { data, isCache, hasMore ->
+      lifecycleScope.launch(Main) {
         if (isCache) {
           adapter.data = data.toMutableList()
           adapter.notifyDataSetChanged()
@@ -112,7 +115,7 @@ abstract class FunkwhaleFragment<D : Any, A : FunkwhaleAdapter<D, *>> : Fragment
         if (!hasMore) {
           swiper?.isRefreshing = false
 
-          GlobalScope.launch(IO) {
+          withContext(IO) {
             if (adapter.data.isNotEmpty()) {
               try {
                 repository.cacheId?.let { cacheId ->

app/src/main/java/com/github/apognu/otter/fragments/LandscapeQueueFragment.kt

@@ -5,6 +5,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.TracksAdapter
@@ -12,7 +13,6 @@ import com.github.apognu.otter.utils.*
 import kotlinx.android.synthetic.main.partial_queue.*
 import kotlinx.android.synthetic.main.partial_queue.view.*
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
@@ -44,7 +44,7 @@ class LandscapeQueueFragment : Fragment() {
   }
 
   private fun refresh() {
-    GlobalScope.launch(Main) {
+    activity?.lifecycleScope?.launch(Main) {
       RequestBus.send(Request.GetQueue).wait<Response.Queue>()?.let { response ->
         adapter?.let {
           it.data = response.queue.toMutableList()
@@ -63,7 +63,7 @@ class LandscapeQueueFragment : Fragment() {
   }
 
   private fun watchEventBus() {
-    GlobalScope.launch(Main) {
+    activity?.lifecycleScope?.launch(Main) {
       EventBus.get().collect { message ->
         when (message) {
           is Event.QueueChanged -> refresh()
@@ -71,7 +71,7 @@ class LandscapeQueueFragment : Fragment() {
       }
     }
 
-    GlobalScope.launch(Main) {
+    activity?.lifecycleScope?.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refresh()

app/src/main/java/com/github/apognu/otter/fragments/PlaylistTracksFragment.kt

@@ -5,6 +5,7 @@ import android.view.Gravity
 import android.view.View
 import androidx.appcompat.widget.PopupMenu
 import androidx.core.os.bundleOf
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.PlaylistTracksAdapter
@@ -15,7 +16,6 @@ import com.squareup.picasso.Picasso
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.fragment_tracks.*
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
@@ -73,7 +73,7 @@ class PlaylistTracksFragment : FunkwhaleFragment<PlaylistTrack, PlaylistTracksAd
   override fun onResume() {
     super.onResume()
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       RequestBus.send(Request.GetCurrentTrack).wait<Response.CurrentTrack>()?.let { response ->
         adapter.currentTrack = response.track
         adapter.notifyDataSetChanged()
@@ -144,7 +144,7 @@ class PlaylistTracksFragment : FunkwhaleFragment<PlaylistTrack, PlaylistTracksAd
       }
 
       imageView?.let { view ->
-        GlobalScope.launch(Main) {
+        lifecycleScope.launch(Main) {
           Picasso.get()
             .maybeLoad(maybeNormalizeUrl(url))
             .fit()
@@ -157,7 +157,7 @@ class PlaylistTracksFragment : FunkwhaleFragment<PlaylistTrack, PlaylistTracksAd
   }
 
   private fun watchEventBus() {
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refreshCurrentTrack(command.track)

app/src/main/java/com/github/apognu/otter/fragments/QueueFragment.kt

@@ -6,6 +6,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.TracksAdapter
@@ -18,7 +19,6 @@ import kotlinx.android.synthetic.main.fragment_queue.view.*
 import kotlinx.android.synthetic.main.partial_queue.*
 import kotlinx.android.synthetic.main.partial_queue.view.*
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
@@ -66,7 +66,7 @@ class QueueFragment : BottomSheetDialogFragment() {
   }
 
   private fun refresh() {
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       RequestBus.send(Request.GetQueue).wait<Response.Queue>()?.let { response ->
         included?.let { included ->
           adapter?.let {
@@ -87,7 +87,7 @@ class QueueFragment : BottomSheetDialogFragment() {
   }
 
   private fun watchEventBus() {
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       EventBus.get().collect { message ->
         when (message) {
           is Event.QueueChanged -> refresh()
@@ -95,7 +95,7 @@ class QueueFragment : BottomSheetDialogFragment() {
       }
     }
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refresh()

app/src/main/java/com/github/apognu/otter/fragments/RadiosFragment.kt

@@ -2,6 +2,7 @@ package com.github.apognu.otter.fragments
 
 import android.os.Bundle
 import androidx.core.view.forEach
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.RadiosAdapter
@@ -9,7 +10,6 @@ import com.github.apognu.otter.repositories.RadiosRepository
 import com.github.apognu.otter.utils.*
 import kotlinx.android.synthetic.main.fragment_radios.*
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
@@ -20,7 +20,7 @@ class RadiosFragment : FunkwhaleFragment<Radio, RadiosAdapter>() {
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
 
-    adapter = RadiosAdapter(context, RadioClickListener())
+    adapter = RadiosAdapter(context, lifecycleScope, RadioClickListener())
     repository = RadiosRepository(context)
   }
 
@@ -34,15 +34,16 @@ class RadiosFragment : FunkwhaleFragment<Radio, RadiosAdapter>() {
 
       CommandBus.send(Command.PlayRadio(radio))
 
-      GlobalScope.launch(Main) {
+      lifecycleScope.launch(Main) {
         EventBus.get().collect { message ->
           when (message) {
             is Event.RadioStarted ->
-              if (radios != null) { recycler.forEach {
-                it.isEnabled = true
-                it.isClickable = true
+              if (radios != null) {
+                recycler.forEach {
+                  it.isEnabled = true
+                  it.isClickable = true
+                }
               }
-            }
           }
         }
       }

app/src/main/java/com/github/apognu/otter/fragments/TracksFragment.kt

@@ -5,6 +5,7 @@ import android.view.Gravity
 import android.view.View
 import androidx.appcompat.widget.PopupMenu
 import androidx.core.os.bundleOf
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.github.apognu.otter.R
 import com.github.apognu.otter.adapters.TracksAdapter
@@ -17,7 +18,6 @@ import jp.wasabeef.picasso.transformations.RoundedCornersTransformation
 import kotlinx.android.synthetic.main.fragment_tracks.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -81,12 +81,10 @@ class TracksFragment : FunkwhaleFragment<Track, TracksAdapter>() {
   override fun onResume() {
     super.onResume()
 
-    GlobalScope.launch(IO) {
+    lifecycleScope.launch(Main) {
       RequestBus.send(Request.GetCurrentTrack).wait<Response.CurrentTrack>()?.let { response ->
-        withContext(Main) {
-          adapter.currentTrack = response.track
-          adapter.notifyDataSetChanged()
-        }
+        adapter.currentTrack = response.track
+        adapter.notifyDataSetChanged()
       }
 
       refreshDownloadedTracks()
@@ -138,7 +136,7 @@ class TracksFragment : FunkwhaleFragment<Track, TracksAdapter>() {
   }
 
   private fun watchEventBus() {
-    GlobalScope.launch(IO) {
+    lifecycleScope.launch(IO) {
       EventBus.get().collect { message ->
         when (message) {
           is Event.DownloadChanged -> refreshDownloadedTrack(message.download)
@@ -146,7 +144,7 @@ class TracksFragment : FunkwhaleFragment<Track, TracksAdapter>() {
       }
     }
 
-    GlobalScope.launch(Main) {
+    lifecycleScope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshTrack -> refreshCurrentTrack(command.track)

app/src/main/java/com/github/apognu/otter/playback/MediaControlsManager.kt

@@ -16,11 +16,11 @@ import com.github.apognu.otter.R
 import com.github.apognu.otter.activities.MainActivity
 import com.github.apognu.otter.utils.*
 import com.squareup.picasso.Picasso
-import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers.Default
 import kotlinx.coroutines.launch
 
-class MediaControlsManager(val context: Service, private val mediaSession: MediaSessionCompat) {
+class MediaControlsManager(val context: Service, private val scope: CoroutineScope, private val mediaSession: MediaSessionCompat) {
   companion object {
     const val NOTIFICATION_ACTION_OPEN_QUEUE = 0
     const val NOTIFICATION_ACTION_PREVIOUS = 1
@@ -39,7 +39,7 @@ class MediaControlsManager(val context: Service, private val mediaSession: Media
         false -> R.drawable.play
       }
 
-      GlobalScope.launch(IO) {
+      scope.launch(Default) {
         val openIntent = Intent(context, MainActivity::class.java).apply { action = NOTIFICATION_ACTION_OPEN_QUEUE.toString() }
         val openPendingIntent = PendingIntent.getActivity(context, 0, openIntent, 0)
 

app/src/main/java/com/github/apognu/otter/playback/PinService.kt

@@ -14,13 +14,16 @@ import com.google.android.exoplayer2.offline.DownloadService
 import com.google.android.exoplayer2.scheduler.Scheduler
 import com.google.android.exoplayer2.ui.DownloadNotificationHelper
 import com.google.gson.Gson
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import java.util.*
 
 class PinService : DownloadService(AppContext.NOTIFICATION_DOWNLOADS) {
+  private val scope: CoroutineScope = CoroutineScope(Job() + Main)
+
   companion object {
     fun download(context: Context, track: Track) {
       track.bestUpload()?.let { upload ->
@@ -45,7 +48,7 @@ class PinService : DownloadService(AppContext.NOTIFICATION_DOWNLOADS) {
   override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
     buildResumeDownloadsIntent(this, PinService::class.java, true)
 
-    GlobalScope.launch(Main) {
+    scope.launch(Main) {
       RequestBus.get().collect { request ->
         when (request) {
           is Request.GetDownloads -> request.channel?.offer(Response.Downloads(getDownloads()))

app/src/main/java/com/github/apognu/otter/playback/PlayerService.kt

@@ -21,23 +21,24 @@ import com.google.android.exoplayer2.SimpleExoPlayer
 import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector
 import com.google.android.exoplayer2.source.TrackGroupArray
 import com.google.android.exoplayer2.trackselection.TrackSelectionArray
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 
 class PlayerService : Service() {
-  private lateinit var queue: QueueManager
-  private val jobs = mutableListOf<Job>()
+  private var started = false
+  private val scope: CoroutineScope = CoroutineScope(Job() + Main)
 
   private lateinit var audioManager: AudioManager
   private var audioFocusRequest: AudioFocusRequest? = null
   private val audioFocusChangeListener = AudioFocusChange()
   private var stateWhenLostFocus = false
 
+  private lateinit var queue: QueueManager
   private lateinit var mediaControlsManager: MediaControlsManager
   private lateinit var mediaSession: MediaSessionCompat
   private lateinit var player: SimpleExoPlayer
@@ -50,7 +51,9 @@ class PlayerService : Service() {
   private lateinit var radioPlayer: RadioPlayer
 
   override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-    if (jobs.isEmpty()) watchEventBus()
+    if (!started) watchEventBus()
+
+    started = true
 
     return START_STICKY
   }
@@ -59,7 +62,7 @@ class PlayerService : Service() {
     super.onCreate()
 
     queue = QueueManager(this)
-    radioPlayer = RadioPlayer(this)
+    radioPlayer = RadioPlayer(this, scope)
 
     audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
 
@@ -83,7 +86,7 @@ class PlayerService : Service() {
       isActive = true
     }
 
-    mediaControlsManager = MediaControlsManager(this, mediaSession)
+    mediaControlsManager = MediaControlsManager(this, scope, mediaSession)
 
     player = SimpleExoPlayer.Builder(this).build().apply {
       playWhenReady = false
@@ -127,7 +130,7 @@ class PlayerService : Service() {
   }
 
   private fun watchEventBus() {
-    jobs.add(GlobalScope.launch(Main) {
+    scope.launch(Main) {
       CommandBus.get().collect { command ->
         when (command) {
           is Command.RefreshService -> {
@@ -193,9 +196,9 @@ class PlayerService : Service() {
           mediaControlsManager.tick()
         }
       }
-    })
+    }
 
-    jobs.add(GlobalScope.launch(Main) {
+    scope.launch(Main) {
       RequestBus.get().collect { request ->
         when (request) {
           is Request.GetCurrentTrack -> request.channel?.offer(Response.CurrentTrack(queue.current()))
@@ -203,9 +206,9 @@ class PlayerService : Service() {
           is Request.GetQueue -> request.channel?.offer(Response.Queue(queue.get()))
         }
       }
-    })
+    }
 
-    jobs.add(GlobalScope.launch(Main) {
+    scope.launch(Main) {
       while (true) {
         delay(1000)
 
@@ -215,18 +218,13 @@ class PlayerService : Service() {
           ProgressBus.send(current, duration, percent)
         }
       }
-    })
+    }
   }
 
   override fun onBind(intent: Intent?): IBinder? = null
 
   @SuppressLint("NewApi")
   override fun onDestroy() {
-    jobs.forEach {
-      it.cancel()
-      jobs.remove(it)
-    }
-
     try {
       unregisterReceiver(headphonesUnpluggedReceiver)
     } catch (_: Exception) {
@@ -372,7 +370,7 @@ class PlayerService : Service() {
       mediaControlsManager.updateNotification(queue.current(), player.playWhenReady)
 
       if (queue.get().isNotEmpty() && queue.current() == queue.get().last() && radioPlayer.isActive()) {
-        GlobalScope.launch(IO) {
+        scope.launch(IO) {
           if (radioPlayer.lock.tryAcquire()) {
             radioPlayer.prepareNextTrack()
             radioPlayer.lock.release()

app/src/main/java/com/github/apognu/otter/playback/RadioPlayer.kt

@@ -10,9 +10,9 @@ import com.github.kittinunf.fuel.coroutines.awaitObjectResponseResult
 import com.github.kittinunf.fuel.coroutines.awaitObjectResult
 import com.github.kittinunf.fuel.gson.gsonDeserializerOf
 import com.google.gson.Gson
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.toList
 import kotlinx.coroutines.launch
@@ -25,7 +25,7 @@ data class RadioTrackBody(val session: Int)
 data class RadioTrack(val position: Int, val track: RadioTrackID)
 data class RadioTrackID(val id: Int)
 
-class RadioPlayer(val context: Context) {
+class RadioPlayer(val context: Context, val scope: CoroutineScope) {
   val lock = Semaphore(1)
 
   private var currentRadio: Radio? = null
@@ -52,7 +52,7 @@ class RadioPlayer(val context: Context) {
     currentRadio = radio
     session = null
 
-    GlobalScope.launch(IO) {
+    scope.launch(IO) {
       createSession()
     }
   }

app/src/main/java/com/github/apognu/otter/repositories/FavoritesRepository.kt

@@ -9,7 +9,6 @@ import com.github.kittinunf.fuel.gson.gsonDeserializerOf
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
 import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import java.io.BufferedReader
@@ -47,7 +46,7 @@ class FavoritesRepository(override val context: Context?) : Repository<Track, Tr
       }
     }
 
-    GlobalScope.launch(IO) {
+    scope.launch(IO) {
       request
         .header("Content-Type", "application/json")
         .body(Gson().toJson(body))
@@ -64,7 +63,7 @@ class FavoritesRepository(override val context: Context?) : Repository<Track, Tr
       }
     }
 
-    GlobalScope.launch(IO) {
+    scope.launch(IO) {
       request
         .header("Content-Type", "application/json")
         .body(Gson().toJson(body))

app/src/main/java/com/github/apognu/otter/repositories/Repository.kt

@@ -3,7 +3,9 @@ package com.github.apognu.otter.repositories
 import android.content.Context
 import com.github.apognu.otter.utils.Cache
 import com.github.apognu.otter.utils.CacheItem
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.Job
 import kotlinx.coroutines.flow.*
 import java.io.BufferedReader
 
@@ -12,6 +14,8 @@ interface Upstream<D> {
 }
 
 abstract class Repository<D : Any, C : CacheItem<D>> {
+  protected val scope: CoroutineScope = CoroutineScope(Job() + IO)
+
   enum class Origin(val origin: Int) {
     Cache(0b01),
     Network(0b10)

app/src/main/java/com/github/apognu/otter/utils/Bus.kt

@@ -77,7 +77,7 @@ object EventBus {
 
 object CommandBus {
   fun send(command: Command) {
-    GlobalScope.launch {
+    GlobalScope.launch(IO) {
       Otter.get().commandBus.offer(command)
     }
   }
@@ -101,7 +101,7 @@ object RequestBus {
 
 object ProgressBus {
   fun send(current: Int, duration: Int, percent: Int) {
-    GlobalScope.launch {
+    GlobalScope.launch(IO) {
       Otter.get().progressBus.send(Triple(current, duration, percent))
     }
   }

app/src/main/java/com/github/apognu/otter/utils/Extensions.kt

@@ -10,15 +10,15 @@ import com.google.android.exoplayer2.offline.Download
 import com.google.gson.Gson
 import com.squareup.picasso.Picasso
 import com.squareup.picasso.RequestCreator
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import kotlin.coroutines.CoroutineContext
 
-inline fun <D> Flow<Repository.Response<D>>.untilNetwork(context: CoroutineContext = Main, crossinline callback: (data: List<D>, isCache: Boolean, hasMore: Boolean) -> Unit) {
-  GlobalScope.launch(context) {
+inline fun <D> Flow<Repository.Response<D>>.untilNetwork(scope: CoroutineScope, context: CoroutineContext = Main, crossinline callback: (data: List<D>, isCache: Boolean, hasMore: Boolean) -> Unit) {
+  scope.launch(context) {
     collect { data ->
       callback(data.data, data.origin == Repository.Origin.Cache, data.hasMore)
     }

app/src/main/res/menu-land/toolbar.xml

@@ -2,13 +2,6 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto">
 
-  <!-- <item
-    android:id="@+id/cast"
-    android:iconTint="@android:color/white"
-    android:title="@string/toolbar_cast"
-    app:actionProviderClass="androidx.mediarouter.app.MediaRouteActionProvider"
-    app:showAsAction="ifRoom" /> -->
-
   <item
     android:id="@+id/nav_search"
     android:icon="@drawable/search"

app/src/main/res/menu/toolbar.xml

@@ -8,13 +8,6 @@
     android:title="@string/playback_queue"
     app:showAsAction="ifRoom" />
 
-  <!-- <item
-    android:id="@+id/cast"
-    android:iconTint="@android:color/white"
-    android:title="@string/toolbar_cast"
-    app:actionProviderClass="androidx.mediarouter.app.MediaRouteActionProvider"
-    app:showAsAction="ifRoom" /> -->
-
   <item
     android:id="@+id/nav_search"
     android:icon="@drawable/search"