Improve downloads binding

app/src/main/java/org/koitharu/kotatsu/download/domain/DownloadState.kt

@@ -9,6 +9,13 @@ sealed interface DownloadState {
 	val manga: Manga
 	val cover: Drawable?
 
+	override fun equals(other: Any?): Boolean
+
+	override fun hashCode(): Int
+
+	val isTerminal: Boolean
+		get() = this is Done || this is Cancelled || (this is Error && !canRetry)
+
 	class Queued(
 		override val startId: Int,
 		override val manga: Manga,

app/src/main/java/org/koitharu/kotatsu/download/ui/DownloadsActivity.kt

@@ -1,27 +1,19 @@
 package org.koitharu.kotatsu.download.ui
 
-import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
-import android.content.ServiceConnection
 import android.os.Bundle
-import android.os.IBinder
 import androidx.core.graphics.Insets
 import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
-import androidx.lifecycle.DefaultLifecycleObserver
-import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.lifecycleScope
 import coil.ImageLoader
 import dagger.hilt.android.AndroidEntryPoint
-import javax.inject.Inject
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.launch
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseActivity
 import org.koitharu.kotatsu.base.ui.list.decor.SpacingItemDecoration
 import org.koitharu.kotatsu.databinding.ActivityDownloadsBinding
-import org.koitharu.kotatsu.download.ui.service.DownloadService
+import javax.inject.Inject
 
 @AndroidEntryPoint
 class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
@@ -29,6 +21,8 @@ class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
 	@Inject
 	lateinit var coil: ImageLoader
 
+	private lateinit var serviceConnection: DownloadsConnection
+
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
 		setContentView(ActivityDownloadsBinding.inflate(layoutInflater))
@@ -38,9 +32,12 @@ class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
 		binding.recyclerView.addItemDecoration(SpacingItemDecoration(spacing))
 		binding.recyclerView.setHasFixedSize(true)
 		binding.recyclerView.adapter = adapter
-		val connection = DownloadServiceConnection(adapter)
-		bindService(Intent(this, DownloadService::class.java), connection, 0)
-		lifecycle.addObserver(connection)
+		serviceConnection = DownloadsConnection(this, this)
+		serviceConnection.items.observe(this) { items ->
+			adapter.items = items
+			binding.textViewHolder.isVisible = items.isNullOrEmpty()
+		}
+		serviceConnection.bind()
 	}
 
 	override fun onWindowInsetsChanged(insets: Insets) {
@@ -55,46 +52,6 @@ class DownloadsActivity : BaseActivity<ActivityDownloadsBinding>() {
 		)
 	}
 
-	private inner class DownloadServiceConnection(
-		private val adapter: DownloadsAdapter,
-	) : ServiceConnection, DefaultLifecycleObserver {
-
-		private var collectJob: Job? = null
-
-		override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
-			collectJob?.cancel()
-			val binder = (service as? DownloadService.DownloadBinder)
-			collectJob = if (binder == null) {
-				null
-			} else {
-				lifecycleScope.launch {
-					binder.downloads.collect {
-						setItems(it)
-					}
-				}
-			}
-		}
-
-		override fun onServiceDisconnected(name: ComponentName?) {
-			collectJob?.cancel()
-			collectJob = null
-			setItems(null)
-		}
-
-		override fun onDestroy(owner: LifecycleOwner) {
-			super.onDestroy(owner)
-			collectJob?.cancel()
-			collectJob = null
-			owner.lifecycle.removeObserver(this)
-			unbindService(this)
-		}
-
-		private fun setItems(items: Collection<DownloadItem>?) {
-			adapter.items = items?.toList().orEmpty()
-			binding.textViewHolder.isVisible = items.isNullOrEmpty()
-		}
-	}
-
 	companion object {
 
 		fun newIntent(context: Context) = Intent(context, DownloadsActivity::class.java)

app/src/main/java/org/koitharu/kotatsu/download/ui/DownloadsConnection.kt

@@ -0,0 +1,76 @@
+package org.koitharu.kotatsu.download.ui
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.os.IBinder
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.download.domain.DownloadState
+import org.koitharu.kotatsu.download.ui.service.DownloadService
+import org.koitharu.kotatsu.utils.asFlowLiveData
+import org.koitharu.kotatsu.utils.progress.PausingProgressJob
+
+class DownloadsConnection(
+	private val context: Context,
+	private val lifecycleOwner: LifecycleOwner,
+) : ServiceConnection {
+
+	private var bindingObserver: BindingLifecycleObserver? = null
+	private var collectJob: Job? = null
+	private val itemsFlow = MutableStateFlow<List<PausingProgressJob<DownloadState>>>(emptyList())
+
+	val items
+		get() = itemsFlow.asFlowLiveData()
+
+	override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+		collectJob?.cancel()
+		val binder = (service as? DownloadService.DownloadBinder)
+		collectJob = if (binder == null) {
+			null
+		} else {
+			lifecycleOwner.lifecycleScope.launch {
+				binder.downloads.collect {
+					itemsFlow.value = it
+				}
+			}
+		}
+	}
+
+	override fun onServiceDisconnected(name: ComponentName?) {
+		collectJob?.cancel()
+		collectJob = null
+		itemsFlow.value = itemsFlow.value.filter { it.progressValue.isTerminal }
+	}
+
+	fun bind() {
+		if (bindingObserver != null) {
+			return
+		}
+		bindingObserver = BindingLifecycleObserver().also {
+			lifecycleOwner.lifecycle.addObserver(it)
+		}
+		context.bindService(Intent(context, DownloadService::class.java), this, 0)
+	}
+
+	fun unbind() {
+		bindingObserver?.let {
+			lifecycleOwner.lifecycle.removeObserver(it)
+		}
+		bindingObserver = null
+		context.unbindService(this)
+	}
+
+	private inner class BindingLifecycleObserver : DefaultLifecycleObserver {
+
+		override fun onDestroy(owner: LifecycleOwner) {
+			super.onDestroy(owner)
+			unbind()
+		}
+	}
+}

app/src/main/java/org/koitharu/kotatsu/download/ui/service/DownloadService.kt

@@ -66,7 +66,7 @@ class DownloadService : BaseService() {
 		val intentFilter = IntentFilter()
 		intentFilter.addAction(ACTION_DOWNLOAD_CANCEL)
 		intentFilter.addAction(ACTION_DOWNLOAD_RESUME)
-		registerReceiver(controlReceiver, intentFilter)
+		ContextCompat.registerReceiver(this, controlReceiver, intentFilter, ContextCompat.RECEIVER_NOT_EXPORTED)
 	}
 
 	override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -155,9 +155,6 @@ class DownloadService : BaseService() {
 		!state.isTerminal
 	}
 
-	private val DownloadState.isTerminal: Boolean
-		get() = this is DownloadState.Done || this is DownloadState.Cancelled || (this is DownloadState.Error && !canRetry)
-
 	@MainThread
 	private fun stopSelfIfIdle() {
 		if (jobs.any { (_, job) -> job.isActive }) {

app/src/main/res/layout/activity_downloads.xml

@@ -14,9 +14,8 @@
 
 		<com.google.android.material.appbar.CollapsingToolbarLayout
 			android:id="@+id/collapsingToolbarLayout"
-			style="?attr/collapsingToolbarLayoutLargeStyle"
 			android:layout_width="match_parent"
-			android:layout_height="?attr/collapsingToolbarLayoutLargeSize"
+			android:layout_height="?attr/collapsingToolbarLayoutMediumSize"
 			app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
 			app:toolbarId="@id/toolbar">
 
@@ -39,7 +38,8 @@
 		android:paddingHorizontal="@dimen/list_spacing"
 		android:scrollbars="vertical"
 		app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
-		app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
+		app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
+		tools:listitem="@layout/item_download" />
 
 	<TextView
 		android:id="@+id/textView_holder"

app/src/main/res/layout/item_download.xml

@@ -11,8 +11,7 @@
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"
 		android:minHeight="@dimen/manga_list_details_item_height"
-		android:orientation="horizontal"
-		android:padding="4dp">
+		android:orientation="horizontal">
 
 		<com.google.android.material.imageview.ShapeableImageView
 			android:id="@+id/imageView_cover"
@@ -31,8 +30,8 @@
 			android:layout_width="0dp"
 			android:layout_height="wrap_content"
 			android:layout_marginStart="16dp"
-			android:layout_marginTop="4dp"
-			android:layout_marginEnd="8dp"
+			android:layout_marginTop="8dp"
+			android:layout_marginEnd="12dp"
 			android:ellipsize="end"
 			android:singleLine="true"
 			android:textAppearance="?attr/textAppearanceTitleSmall"
@@ -47,11 +46,11 @@
 			android:layout_height="wrap_content"
 			android:layout_marginStart="16dp"
 			android:layout_marginTop="4dp"
-			android:layout_marginEnd="8dp"
+			android:layout_marginEnd="12dp"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toEndOf="@id/imageView_cover"
 			app:layout_constraintTop_toBottomOf="@id/textView_title"
-			tools:progress="25"/>
+			tools:progress="25" />
 
 		<TextView
 			android:id="@+id/textView_status"
@@ -59,7 +58,7 @@
 			android:layout_height="wrap_content"
 			android:layout_marginStart="16dp"
 			android:layout_marginTop="4dp"
-			android:layout_marginEnd="8dp"
+			android:layout_marginEnd="12dp"
 			android:ellipsize="end"
 			android:singleLine="true"
 			android:textAppearance="?attr/textAppearanceBodySmall"
@@ -72,7 +71,7 @@
 			android:id="@+id/textView_percent"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
-			android:layout_marginEnd="8dp"
+			android:layout_marginEnd="12dp"
 			android:textAppearance="?attr/textAppearanceBodyMedium"
 			app:layout_constraintBaseline_toBaselineOf="@id/textView_status"
 			app:layout_constraintEnd_toEndOf="parent"
@@ -84,7 +83,7 @@
 			android:layout_height="wrap_content"
 			android:layout_marginStart="16dp"
 			android:layout_marginTop="4dp"
-			android:layout_marginEnd="8dp"
+			android:layout_marginEnd="12dp"
 			android:ellipsize="end"
 			android:maxLines="4"
 			android:textAppearance="?attr/textAppearanceBodySmall"
@@ -98,6 +97,8 @@
 			style="@style/Widget.Material3.Button.TextButton"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
+			android:layout_marginEnd="4dp"
+			android:layout_marginBottom="4dp"
 			android:text="@string/try_again"
 			android:visibility="gone"
 			app:layout_constraintBottom_toBottomOf="parent"
@@ -111,6 +112,8 @@
 			style="@style/Widget.Material3.Button.TextButton"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
+			android:layout_marginEnd="4dp"
+			android:layout_marginBottom="4dp"
 			android:text="@android:string/cancel"
 			android:visibility="gone"
 			app:layout_constraintBottom_toBottomOf="parent"