App udpate activity #880

app/src/main/AndroidManifest.xml

@@ -245,6 +245,9 @@
 		<activity
 			android:name="org.koitharu.kotatsu.alternatives.ui.AlternativesActivity"
 			android:label="@string/alternatives" />
+		<activity
+			android:name="org.koitharu.kotatsu.settings.about.AppUpdateActivity"
+			android:label="@string/app_update_available" />
 
 		<service
 			android:name="androidx.work.impl.foreground.SystemForegroundService"
@@ -357,13 +360,6 @@
 				android:name="android.appwidget.provider"
 				android:resource="@xml/widget_recent" />
 		</receiver>
-		<receiver
-			android:name="org.koitharu.kotatsu.settings.about.UpdateDownloadReceiver"
-			android:exported="true">
-			<intent-filter>
-				<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
-			</intent-filter>
-		</receiver>
 		<receiver
 			android:name="org.koitharu.kotatsu.core.ErrorReporterReceiver"
 			android:exported="false">

app/src/main/kotlin/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.main.ui
 
 import android.Manifest
+import android.content.Intent
 import android.content.pm.PackageManager.PERMISSION_GRANTED
 import android.os.Build
 import android.os.Bundle
@@ -66,7 +67,7 @@ import org.koitharu.kotatsu.search.ui.suggestion.SearchSuggestionFragment
 import org.koitharu.kotatsu.search.ui.suggestion.SearchSuggestionListener
 import org.koitharu.kotatsu.search.ui.suggestion.SearchSuggestionViewModel
 import org.koitharu.kotatsu.settings.SettingsActivity
-import org.koitharu.kotatsu.settings.about.AppUpdateDialog
+import org.koitharu.kotatsu.settings.about.AppUpdateActivity
 import javax.inject.Inject
 import com.google.android.material.R as materialR
 
@@ -84,7 +85,6 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 	private val viewModel by viewModels<MainViewModel>()
 	private val searchSuggestionViewModel by viewModels<SearchSuggestionViewModel>()
 	private val closeSearchCallback = CloseSearchCallback()
-	private val appUpdateDialog = AppUpdateDialog(this)
 	private lateinit var navigationDelegate: MainNavigationDelegate
 	private lateinit var appUpdateBadge: OptionsMenuBadgeHelper
 
@@ -190,9 +190,8 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		}
 
 		R.id.action_app_update -> {
-			viewModel.appUpdate.value?.also {
-				appUpdateDialog.show(it)
-			} != null
+			startActivity(Intent(this, AppUpdateActivity::class.java))
+			true
 		}
 
 		else -> super.onOptionsItemSelected(item)

app/src/main/kotlin/org/koitharu/kotatsu/settings/SettingsActivity.kt

@@ -29,7 +29,6 @@ import org.koitharu.kotatsu.databinding.ActivitySettingsBinding
 import org.koitharu.kotatsu.main.ui.owners.AppBarOwner
 import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.settings.about.AboutSettingsFragment
-import org.koitharu.kotatsu.settings.about.AppUpdateDialog
 import org.koitharu.kotatsu.settings.sources.SourceSettingsFragment
 import org.koitharu.kotatsu.settings.sources.SourcesSettingsFragment
 import org.koitharu.kotatsu.settings.sources.manage.SourcesManageFragment
@@ -43,8 +42,6 @@ class SettingsActivity :
 	AppBarOwner,
 	FragmentManager.OnBackStackChangedListener {
 
-	val appUpdateDialog = AppUpdateDialog(this)
-
 	override val appBar: AppBarLayout
 		get() = viewBinding.appbar
 

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AboutSettingsFragment.kt

@@ -20,7 +20,6 @@ import org.koitharu.kotatsu.core.ui.BasePreferenceFragment
 import org.koitharu.kotatsu.core.util.ShareHelper
 import org.koitharu.kotatsu.core.util.ext.observe
 import org.koitharu.kotatsu.core.util.ext.observeEvent
-import org.koitharu.kotatsu.settings.SettingsActivity
 import javax.inject.Inject
 
 @AndroidEntryPoint
@@ -77,7 +76,7 @@ class AboutSettingsFragment : BasePreferenceFragment(R.string.about) {
 			Snackbar.make(listView, R.string.no_update_available, Snackbar.LENGTH_SHORT).show()
 			return
 		}
-		(activity as SettingsActivity).appUpdateDialog.show(version)
+		startActivity(Intent(requireContext(), AppUpdateActivity::class.java))
 	}
 
 	private fun openLink(url: String, title: CharSequence?) {

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AppUpdateActivity.kt

@@ -0,0 +1,180 @@
+package org.koitharu.kotatsu.settings.about
+
+import android.Manifest
+import android.app.DownloadManager
+import android.content.ActivityNotFoundException
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.os.Build
+import android.os.Bundle
+import android.view.View
+import android.widget.TextView
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.core.content.ContextCompat
+import androidx.core.graphics.Insets
+import androidx.core.net.toUri
+import androidx.core.text.buildSpannedString
+import dagger.hilt.android.AndroidEntryPoint
+import io.noties.markwon.Markwon
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.withContext
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.github.AppVersion
+import org.koitharu.kotatsu.core.ui.BaseActivity
+import org.koitharu.kotatsu.core.util.FileSize
+import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
+import org.koitharu.kotatsu.core.util.ext.observe
+import org.koitharu.kotatsu.core.util.ext.observeEvent
+import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
+import org.koitharu.kotatsu.core.util.ext.setTextAndVisible
+import org.koitharu.kotatsu.core.util.ext.showOrHide
+import org.koitharu.kotatsu.core.util.ext.textAndVisible
+import org.koitharu.kotatsu.databinding.ActivityAppUpdateBinding
+
+@AndroidEntryPoint
+class AppUpdateActivity : BaseActivity<ActivityAppUpdateBinding>(), View.OnClickListener {
+
+	private val viewModel: AppUpdateViewModel by viewModels()
+	private lateinit var downloadReceiver: UpdateDownloadReceiver
+
+	private val permissionRequest = registerForActivityResult(
+		ActivityResultContracts.RequestPermission(),
+	) {
+		if (it) {
+			viewModel.startDownload()
+		} else {
+			openInBrowser()
+		}
+	}
+
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setContentView(ActivityAppUpdateBinding.inflate(layoutInflater))
+		downloadReceiver = UpdateDownloadReceiver(viewModel)
+		viewModel.nextVersion.observe(this, ::onNextVersionChanged)
+		viewBinding.buttonCancel.setOnClickListener(this)
+		viewBinding.buttonUpdate.setOnClickListener(this)
+
+		ContextCompat.registerReceiver(
+			this,
+			downloadReceiver,
+			IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE),
+			ContextCompat.RECEIVER_EXPORTED,
+		)
+		combine(viewModel.isLoading, viewModel.downloadProgress, ::Pair)
+			.observe(this, ::onProgressChanged)
+		viewModel.downloadState.observe(this, ::onDownloadStateChanged)
+		viewModel.onError.observeEvent(this, ::onError)
+		viewModel.onDownloadDone.observeEvent(this) { intent ->
+			try {
+				startActivity(intent)
+			} catch (e: ActivityNotFoundException) {
+				e.printStackTraceDebug()
+			}
+		}
+	}
+
+	override fun onDestroy() {
+		unregisterReceiver(downloadReceiver)
+		super.onDestroy()
+	}
+
+	override fun onClick(v: View) {
+		when (v.id) {
+			R.id.button_cancel -> finishAfterTransition()
+			R.id.button_update -> doUpdate()
+		}
+	}
+
+	override fun onWindowInsetsChanged(insets: Insets) {
+		val basePadding = resources.getDimensionPixelOffset(R.dimen.screen_padding)
+		viewBinding.root.setPadding(
+			basePadding + insets.left,
+			basePadding + insets.top,
+			basePadding + insets.right,
+			basePadding + insets.bottom,
+		)
+	}
+
+	private suspend fun onNextVersionChanged(version: AppVersion?) {
+		viewBinding.buttonUpdate.isEnabled = version != null && !viewModel.isLoading.value
+		if (version == null) {
+			viewBinding.textViewContent.setText(R.string.loading_)
+			return
+		}
+		val message = withContext(Dispatchers.Default) {
+			buildSpannedString {
+				append(getString(R.string.new_version_s, version.name))
+				appendLine()
+				append(getString(R.string.size_s, FileSize.BYTES.format(this@AppUpdateActivity, version.apkSize)))
+				appendLine()
+				appendLine()
+				append(Markwon.create(this@AppUpdateActivity).toMarkdown(version.description))
+			}
+		}
+		viewBinding.textViewContent.setText(message, TextView.BufferType.SPANNABLE)
+	}
+
+	private fun doUpdate() {
+		viewModel.installIntent.value?.let { intent ->
+			try {
+				startActivity(intent)
+			} catch (e: ActivityNotFoundException) {
+				onError(e)
+			}
+			return
+		}
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
+			permissionRequest.launch(Manifest.permission.WRITE_EXTERNAL_STORAGE)
+		} else {
+			viewModel.startDownload()
+		}
+	}
+
+	private fun openInBrowser() {
+		val latestVersion = viewModel.nextVersion.value ?: return
+		val intent = Intent(Intent.ACTION_VIEW, latestVersion.url.toUri())
+		startActivity(Intent.createChooser(intent, getString(R.string.open_in_browser)))
+	}
+
+	private fun onProgressChanged(value: Pair<Boolean, Float>) {
+		val (isLoading, downloadProgress) = value
+		val indicator = viewBinding.progressBar
+		indicator.showOrHide(isLoading)
+		indicator.isIndeterminate = downloadProgress <= 0f
+		if (downloadProgress > 0f) {
+			indicator.setProgressCompat((indicator.max * downloadProgress).toInt(), true)
+		}
+		viewBinding.buttonUpdate.isEnabled = !isLoading && viewModel.nextVersion.value != null
+	}
+
+	private fun onDownloadStateChanged(state: Int) {
+		val message = when (state) {
+			DownloadManager.STATUS_FAILED -> R.string.error_occurred
+			DownloadManager.STATUS_PAUSED -> R.string.downloads_paused
+			else -> 0
+		}
+		viewBinding.textViewError.setTextAndVisible(message)
+	}
+
+	private fun onError(e: Throwable) {
+		viewBinding.textViewError.textAndVisible = e.getDisplayMessage(resources)
+	}
+
+	private class UpdateDownloadReceiver(
+		private val viewModel: AppUpdateViewModel,
+	) : BroadcastReceiver() {
+
+		override fun onReceive(context: Context, intent: Intent) {
+			when (intent.action) {
+				DownloadManager.ACTION_DOWNLOAD_COMPLETE -> {
+					viewModel.onDownloadComplete(intent)
+				}
+			}
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AppUpdateDialog.kt

@@ -1,89 +0,0 @@
-package org.koitharu.kotatsu.settings.about
-
-import android.Manifest
-import android.app.DownloadManager
-import android.content.Context
-import android.content.Intent
-import android.os.Build
-import android.os.Environment
-import android.widget.Toast
-import androidx.activity.result.contract.ActivityResultContracts
-import androidx.appcompat.app.AppCompatActivity
-import androidx.core.net.toUri
-import androidx.core.text.buildSpannedString
-import com.google.android.material.dialog.MaterialAlertDialogBuilder
-import io.noties.markwon.Markwon
-import org.koitharu.kotatsu.R
-import org.koitharu.kotatsu.core.github.AppVersion
-import org.koitharu.kotatsu.core.util.FileSize
-import org.koitharu.kotatsu.core.util.ext.DIALOG_THEME_CENTERED
-import org.koitharu.kotatsu.core.util.ext.getDisplayMessage
-
-class AppUpdateDialog(private val activity: AppCompatActivity) {
-
-	private lateinit var latestVersion: AppVersion
-
-	private val permissionRequest = activity.registerForActivityResult(
-		ActivityResultContracts.RequestPermission(),
-	) {
-		if (it) {
-			downloadUpdateImpl()
-		} else {
-			openInBrowser()
-		}
-	}
-
-	fun show(version: AppVersion) {
-		latestVersion = version
-		val message = buildSpannedString {
-			append(activity.getString(R.string.new_version_s, version.name))
-			appendLine()
-			append(activity.getString(R.string.size_s, FileSize.BYTES.format(activity, version.apkSize)))
-			appendLine()
-			appendLine()
-			append(Markwon.create(activity).toMarkdown(version.description))
-		}
-		MaterialAlertDialogBuilder(activity, DIALOG_THEME_CENTERED)
-			.setTitle(R.string.app_update_available)
-			.setMessage(message)
-			.setIcon(R.drawable.ic_app_update)
-			.setNeutralButton(R.string.open_in_browser) { _, _ ->
-				val intent = Intent(Intent.ACTION_VIEW, version.url.toUri())
-				activity.startActivity(Intent.createChooser(intent, activity.getString(R.string.open_in_browser)))
-			}.setPositiveButton(R.string.update) { _, _ ->
-				downloadUpdate()
-			}.setNegativeButton(android.R.string.cancel, null)
-			.setCancelable(false)
-			.create()
-			.show()
-	}
-
-	private fun downloadUpdate() {
-		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
-			permissionRequest.launch(Manifest.permission.WRITE_EXTERNAL_STORAGE)
-		} else {
-			downloadUpdateImpl()
-		}
-	}
-
-	private fun downloadUpdateImpl() = runCatching {
-		val version = latestVersion
-		val url = version.apkUrl.toUri()
-		val dm = activity.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
-		val request = DownloadManager.Request(url)
-			.setTitle("${activity.getString(R.string.app_name)} v${version.name}")
-			.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, url.lastPathSegment)
-			.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
-			.setMimeType("application/vnd.android.package-archive")
-		dm.enqueue(request)
-	}.onSuccess {
-		Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show()
-	}.onFailure { e ->
-		Toast.makeText(activity, e.getDisplayMessage(activity.resources), Toast.LENGTH_SHORT).show()
-	}
-
-	private fun openInBrowser() {
-		val intent = Intent(Intent.ACTION_VIEW, latestVersion.url.toUri())
-		activity.startActivity(Intent.createChooser(intent, activity.getString(R.string.open_in_browser)))
-	}
-}

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/AppUpdateViewModel.kt

@@ -0,0 +1,102 @@
+package org.koitharu.kotatsu.settings.about
+
+import android.app.DownloadManager
+import android.content.Context
+import android.content.Intent
+import android.os.Environment
+import androidx.core.net.toUri
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.isActive
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.github.AppUpdateRepository
+import org.koitharu.kotatsu.core.ui.BaseViewModel
+import org.koitharu.kotatsu.core.util.ext.MutableEventFlow
+import org.koitharu.kotatsu.core.util.ext.call
+import org.koitharu.kotatsu.core.util.ext.requireValue
+import javax.inject.Inject
+import kotlin.coroutines.coroutineContext
+
+@HiltViewModel
+class AppUpdateViewModel @Inject constructor(
+	private val repository: AppUpdateRepository,
+	@ApplicationContext context: Context,
+) : BaseViewModel() {
+
+	val nextVersion = repository.observeAvailableUpdate()
+	val downloadProgress = MutableStateFlow(-1f)
+	val downloadState = MutableStateFlow(DownloadManager.STATUS_PENDING)
+	val installIntent = MutableStateFlow<Intent?>(null)
+	val onDownloadDone = MutableEventFlow<Intent>()
+
+	private val downloadManager = context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+	private val appName = context.getString(R.string.app_name)
+
+	init {
+		if (nextVersion.value == null) {
+			launchLoadingJob(Dispatchers.Default) {
+				repository.fetchUpdate()
+			}
+		}
+	}
+
+	fun startDownload() {
+		launchLoadingJob(Dispatchers.Default) {
+			val version = nextVersion.requireValue()
+			val url = version.apkUrl.toUri()
+			val request = DownloadManager.Request(url)
+				.setTitle("$appName v${version.name}")
+				.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, url.lastPathSegment)
+				.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
+				.setMimeType("application/vnd.android.package-archive")
+			val downloadId = downloadManager.enqueue(request)
+			observeDownload(downloadId)
+		}
+	}
+
+	fun onDownloadComplete(intent: Intent) {
+		launchLoadingJob(Dispatchers.Default) {
+			val downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0L)
+			if (downloadId == 0L) {
+				return@launchLoadingJob
+			}
+			@Suppress("DEPRECATION")
+			val installerIntent = Intent(Intent.ACTION_INSTALL_PACKAGE)
+			installerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION)
+			installerIntent.setDataAndType(
+				downloadManager.getUriForDownloadedFile(downloadId),
+				downloadManager.getMimeTypeForDownloadedFile(downloadId),
+			)
+			installerIntent.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true)
+			installIntent.value = installerIntent
+			onDownloadDone.call(installerIntent)
+		}
+	}
+
+	private suspend fun observeDownload(id: Long) {
+		val query = DownloadManager.Query()
+		query.setFilterById(id)
+		while (coroutineContext.isActive) {
+			downloadManager.query(query).use { cursor ->
+				if (cursor.moveToFirst()) {
+					val bytesDownloaded = cursor.getLong(
+						cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR),
+					)
+					val bytesTotal = cursor.getLong(
+						cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_TOTAL_SIZE_BYTES),
+					)
+					downloadProgress.value = bytesDownloaded.toFloat() / bytesTotal
+					val state = cursor.getInt(cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_STATUS))
+					downloadState.value = state
+					if (state == DownloadManager.STATUS_SUCCESSFUL || state == DownloadManager.STATUS_FAILED) {
+						return
+					}
+				}
+			}
+			delay(100)
+		}
+	}
+}

app/src/main/kotlin/org/koitharu/kotatsu/settings/about/UpdateDownloadReceiver.kt

@@ -1,38 +0,0 @@
-package org.koitharu.kotatsu.settings.about
-
-import android.app.DownloadManager
-import android.content.ActivityNotFoundException
-import android.content.BroadcastReceiver
-import android.content.Context
-import android.content.Intent
-import org.koitharu.kotatsu.core.util.ext.printStackTraceDebug
-
-
-class UpdateDownloadReceiver : BroadcastReceiver() {
-
-	override fun onReceive(context: Context, intent: Intent) {
-		when (intent.action) {
-			DownloadManager.ACTION_DOWNLOAD_COMPLETE -> {
-				val downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0L)
-				if (downloadId == 0L) {
-					return
-				}
-				val dm = context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
-
-				@Suppress("DEPRECATION")
-				val installIntent = Intent(Intent.ACTION_INSTALL_PACKAGE)
-				installIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION)
-				installIntent.setDataAndType(
-					dm.getUriForDownloadedFile(downloadId),
-					dm.getMimeTypeForDownloadedFile(downloadId),
-				)
-				installIntent.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true)
-				try {
-					context.startActivity(installIntent)
-				} catch (e: ActivityNotFoundException) {
-					e.printStackTraceDebug()
-				}
-			}
-		}
-	}
-}

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

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:padding="@dimen/screen_padding">
+
+	<TextView
+		android:id="@+id/textView_title"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="8dp"
+		android:drawablePadding="16dp"
+		android:gravity="center_horizontal"
+		android:text="@string/app_update_available"
+		android:textAppearance="?textAppearanceHeadline5"
+		app:drawableTint="?colorPrimary"
+		app:drawableTopCompat="@drawable/ic_app_update"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent" />
+
+	<com.google.android.material.progressindicator.LinearProgressIndicator
+		android:id="@+id/progressBar"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="@dimen/screen_padding"
+		android:max="100"
+		android:visibility="gone"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/textView_title"
+		tools:visibility="visible" />
+
+	<TextView
+		android:id="@+id/textView_error"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="8dp"
+		android:textColor="?colorError"
+		android:visibility="gone"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/progressBar"
+		tools:text="@string/error_corrupted_file"
+		tools:visibility="visible" />
+
+	<ScrollView
+		android:id="@+id/scrollView"
+		android:layout_width="0dp"
+		android:layout_height="0dp"
+		android:layout_marginVertical="@dimen/screen_padding"
+		app:layout_constraintBottom_toTopOf="@id/barrier"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/textView_error">
+
+		<TextView
+			android:id="@+id/textView_content"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:textAppearance="?textAppearanceBodyMedium"
+			tools:text="@tools:sample/lorem/random" />
+
+	</ScrollView>
+
+	<com.google.android.material.button.MaterialButton
+		android:id="@+id/button_cancel"
+		style="@style/Widget.Material3.Button.OutlinedButton"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:text="@android:string/cancel"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintStart_toStartOf="parent" />
+
+	<com.google.android.material.button.MaterialButton
+		android:id="@+id/button_update"
+		style="@style/Widget.Material3.Button.TonalButton"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:enabled="false"
+		android:text="@string/update"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent" />
+
+	<androidx.constraintlayout.widget.Barrier
+		android:id="@+id/barrier"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		app:barrierDirection="top"
+		app:constraint_referenced_ids="button_cancel,button_update" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>