progress bar + material you title bar

app/build.gradle.kts

@@ -77,7 +77,6 @@ dependencies {
 	testImplementation("androidx.test.ext:junit:1.1.5")
 	testImplementation("androidx.test.espresso:espresso-core:3.5.1")
 	implementation("com.google.code.gson:gson:2.10.1")
-
 }
 
 ktlint {

app/src/main/java/com/fredhappyface/ewesticker/MainActivity.kt

@@ -16,6 +16,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.lifecycleScope
 import androidx.preference.PreferenceManager
 import com.fredhappyface.ewesticker.utilities.Toaster
+import com.google.android.material.progressindicator.LinearProgressIndicator
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -120,11 +121,13 @@ class MainActivity : AppCompatActivity() {
 		toaster.toast(getString(R.string.imported_010))
 		val button = findViewById<Button>(R.id.updateStickerPackInfoBtn)
 		val button2 = findViewById<Button>(R.id.reloadStickerPackInfoBtn)
+		val progressBar = findViewById<LinearProgressIndicator>(R.id.linearProgressIndicator)
 		button.isEnabled = false
 		button2.isEnabled = false
 
 		lifecycleScope.launch(Dispatchers.IO) {
-			val totalStickers = StickerImporter(baseContext, toaster).importStickers(stickerDirPath)
+			val totalStickers =
+				StickerImporter(baseContext, toaster, progressBar).importStickers(stickerDirPath)
 
 			withContext(Dispatchers.Main) {
 				toaster.toastOnState(

app/src/main/java/com/fredhappyface/ewesticker/StickerImporter.kt

@@ -2,9 +2,13 @@ package com.fredhappyface.ewesticker
 
 import android.content.Context
 import android.net.Uri
+import android.os.Handler
+import android.os.Looper
+import android.view.View
 import androidx.documentfile.provider.DocumentFile
 import com.fredhappyface.ewesticker.utilities.Toaster
 import com.fredhappyface.ewesticker.utilities.Utils
+import com.google.android.material.progressindicator.LinearProgressIndicator
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
@@ -28,11 +32,19 @@ private const val BUFFER_SIZE = 64 * 1024  // 64 KB
 class StickerImporter(
 	private val context: Context,
 	private val toaster: Toaster,
+	private val progressBar: LinearProgressIndicator,
 ) {
 	private val supportedMimes = Utils.getSupportedMimes()
 	private val packSizes: MutableMap<String, Int> = mutableMapOf()
 	private var totalStickers = 0
 
+	private val mainHandler = Handler(Looper.getMainLooper())
+
+	private fun updateProgressBar(currentProgress: Int, totalStickers: Int) {
+		val progressPercentage = (currentProgress.toFloat() / totalStickers.toFloat()) * 100
+		progressBar.progress = progressPercentage.toInt()
+	}
+
 
 	/**
 	 * Used by the ACTION_OPEN_DOCUMENT_TREE handler function to copy stickers from a
@@ -43,18 +55,37 @@ class StickerImporter(
 	 */
 	suspend fun importStickers(stickerDirPath: String): Int {
 		File(context.filesDir, "stickers").deleteRecursively()
+		withContext(Dispatchers.Main) {
+			progressBar.visibility = View.VISIBLE
+			progressBar.isIndeterminate = true
+		}
+
 		val leafNodes = fileWalk(DocumentFile.fromTreeUri(context, Uri.parse(stickerDirPath)))
 		if (leafNodes.size > MAX_FILES) {
 			toaster.setState(1)
 		}
 
+		withContext(Dispatchers.Main) {
+			progressBar.isIndeterminate = false
+		}
+
+
 		// Perform concurrent file copy operations
 		withContext(Dispatchers.IO) {
-			leafNodes.take(MAX_FILES).map { file ->
+			leafNodes.take(MAX_FILES).mapIndexed { index, file ->
-				async { importSticker(file) }
+				async {
+					importSticker(file)
+					mainHandler.post {
+						updateProgressBar(index + 1, leafNodes.size)
+					}
+				}
 			}.awaitAll()
 		}
 
+		withContext(Dispatchers.Main) {
+			progressBar.visibility = View.GONE
+		}
+
 		return leafNodes.size
 	}
 
@@ -107,18 +138,24 @@ class StickerImporter(
 	 */
 	private fun fileWalk(rootNode: DocumentFile?): Set<DocumentFile> {
 		val leafNodes = mutableSetOf<DocumentFile>()
-		if (rootNode == null || totalStickers >= MAX_FILES) {
+		val stack = ArrayDeque<DocumentFile?>()
-			return leafNodes
+
-		}
+		rootNode?.let { stack.addLast(it) }
-		rootNode.listFiles().forEach { file ->
+
-			if (file.isFile) {
+		while (stack.isNotEmpty() && leafNodes.size < MAX_FILES) {
-				leafNodes.add(file)
+			val currentFile = stack.removeLast()
-				totalStickers++
+
-			} else if (file.isDirectory) {
+			currentFile?.listFiles()?.forEach { file ->
-				leafNodes.addAll(fileWalk(file))
+				if (file.isFile) {
-			}
+					leafNodes.add(file)
-			if (totalStickers >= MAX_FILES) {
+					totalStickers++
-				return@forEach
+
+					if (leafNodes.size >= MAX_FILES) {
+						return leafNodes
+					}
+				} else if (file.isDirectory) {
+					stack.addLast(file)
+				}
 			}
 		}
 		return leafNodes

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

@@ -1,15 +1,48 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.google.android.material.circularreveal.coordinatorlayout.CircularRevealCoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
 	xmlns:app="http://schemas.android.com/apk/res-auto"
 	android:id="@+id/activityMainRoot"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent"
 	android:background="@color/bg">
 
-	<ScrollView
+	<com.google.android.material.appbar.AppBarLayout
+		android:id="@+id/appBarLayout"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:background="@color/accent">
+
+		<com.google.android.material.appbar.CollapsingToolbarLayout
+			android:id="@+id/collapsingToolbarLayout"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			app:layout_scrollFlags="scroll|exitUntilCollapsed"
+			android:background="@color/accent"
+			app:collapsedTitleTextAppearance="@style/ToolbarTitleTextAppearance"
+			app:expandedTitleTextAppearance="@style/ToolbarTitleTextAppearance"
+			app:title="  EweSticker">
+
+			<View
+				android:layout_width="match_parent"
+				android:layout_height="@dimen/appbar_padding"
+				android:background="@color/accent" />
+
+			<androidx.appcompat.widget.Toolbar
+				android:id="@+id/toolbar"
+				android:layout_width="match_parent"
+				android:layout_height="?attr/actionBarSize"
+				app:layout_collapseMode="none"
+				app:layout_collapseParallaxMultiplier="0.7"
+				android:background="@color/accent" />
+
+
+		</com.google.android.material.appbar.CollapsingToolbarLayout>
+	</com.google.android.material.appbar.AppBarLayout>
+
+	<androidx.core.widget.NestedScrollView
 		android:layout_width="match_parent"
 		android:layout_height="match_parent"
-		android:orientation="vertical">
+		app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
 		<LinearLayout
 			style="@style/widthMatchHeightWrap"
@@ -111,6 +144,13 @@
 						android:onClick="reloadStickers"
 						android:text="@string/reload_sticker_pack_button"
 						app:shapeAppearance="?attr/shapeAppearanceSmallComponent" />
+
+					<com.google.android.material.progressindicator.LinearProgressIndicator
+						android:id="@+id/linearProgressIndicator"
+						android:layout_width="match_parent"
+						android:layout_height="wrap_content"
+						android:visibility="gone" />
+
 				</LinearLayout>
 			</com.google.android.material.card.MaterialCardView>
 			<!-- Options -->
@@ -292,5 +332,5 @@
 				</LinearLayout>
 			</com.google.android.material.card.MaterialCardView>
 		</LinearLayout>
-	</ScrollView>
+	</androidx.core.widget.NestedScrollView>
-</com.google.android.material.circularreveal.coordinatorlayout.CircularRevealCoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/values-v27/styles.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-	<style name="AppTheme" parent="Theme.Material3.DayNight">
+	<style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
 		<!-- Primary brand color. -->
 		<item name="colorPrimaryVariant">@color/accent</item>
 		<item name="colorOnPrimary">@color/onAccent</item>

app/src/main/res/values/dimen.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 	<dimen name="r_btn">32sp</dimen>
+	<dimen name="appbar_padding">160dp</dimen>
+	<dimen name="text_size_title">36sp</dimen>
 	<dimen name="text_size_heading">24sp</dimen>
 	<dimen name="text_size_body">16sp</dimen>
 	<dimen name="content_margin">10dp</dimen>

app/src/main/res/values/styles.xml

@@ -1,6 +1,6 @@
 <resources>
 	<!-- Base application theme. -->
-	<style name="AppTheme" parent="Theme.Material3.DayNight">
+	<style name="AppTheme" parent="Theme.Material3.DayNight.NoActionBar">
 		<!-- Primary brand color. -->
 		<item name="colorPrimaryVariant">@color/accent</item>
 		<item name="colorOnPrimary">@color/onAccent</item>
@@ -23,6 +23,11 @@
 		<item name="shapeAppearanceSmallComponent">@style/ShapeAppearance.App.SmallComponent</item>
 	</style>
 
+	<style name="ToolbarTitleTextAppearance" parent="@style/TextAppearance.Widget.AppCompat.Toolbar.Title">
+		<item name="android:textSize">@dimen/text_size_title</item>
+	</style>
+
+
 	<style name="ShapeAppearance.App.MediumComponent" parent="ShapeAppearance.MaterialComponents.MediumComponent">
 		<item name="cornerSize">@dimen/corner</item>
 	</style>