Added Fastscroll Library with section popup support

Fixed collation for the sorting of tha Artist list

dependencies.gradle

@@ -38,6 +38,7 @@ ext.versions = [
         robolectric          : "4.4",
         dexter               : "6.1.2",
         timber               : "4.7.1",
+        fastScroll           : "2.0.1",
 ]
 
 ext.gradlePlugins = [
@@ -77,6 +78,7 @@ ext.other = [
         picasso            : "com.squareup.picasso:picasso:$versions.picasso",
         dexter             : "com.karumi:dexter:$versions.dexter",
         timber             : "com.jakewharton.timber:timber:$versions.timber",
+        fastScroll         : "com.simplecityapps:recyclerview-fastscroll:$versions.fastScroll",
 ]
 
 ext.testing = [

ultrasonic/build.gradle

@@ -77,6 +77,7 @@ dependencies {
     implementation other.koinAndroid
     implementation other.koinViewModel
     implementation other.okhttpLogging
+    implementation other.fastScroll
 
     kapt androidSupport.room
 

ultrasonic/src/main/kotlin/org/moire/ultrasonic/activity/ArtistRowAdapter.kt

@@ -29,11 +29,13 @@ import android.widget.PopupMenu
 import android.widget.RelativeLayout
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView
+import com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView.SectionedAdapter
 import org.moire.ultrasonic.R
 import org.moire.ultrasonic.data.ActiveServerProvider.Companion.isOffline
 import org.moire.ultrasonic.domain.Artist
 import org.moire.ultrasonic.domain.MusicDirectory
 import org.moire.ultrasonic.util.ImageLoader
+import java.text.Collator
 
 /**
  * Creates a Row in a RecyclerView which contains the details of an Artist
@@ -45,14 +47,14 @@ class ArtistRowAdapter(
     val onArtistClick: (Artist) -> Unit,
     val onContextMenuClick: (MenuItem, Artist) -> Boolean,
     val onFolderClick: (view: View) -> Unit,
-    val imageLoader: ImageLoader
-) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+    private val imageLoader: ImageLoader
+) : RecyclerView.Adapter<RecyclerView.ViewHolder>(), SectionedAdapter {
 
     /**
      * Sets the data to be displayed in the RecyclerView
      */
     fun setData(data: List<Artist>) {
-        artistList = data.sortedBy { t -> t.name }
+        artistList = data.sortedWith(compareBy(Collator.getInstance()){ t -> t.name })
         notifyDataSetChanged()
     }
 
@@ -133,6 +135,11 @@ class ArtistRowAdapter(
         return if (position == 0 && shouldShowHeader) TYPE_HEADER else TYPE_ITEM
     }
 
+    override fun getSectionName(position: Int): String {
+        val listPosition = if (shouldShowHeader) position - 1 else position
+        return getSectionFromName(artistList[listPosition].name ?: " ")
+    }
+
     private fun getSectionForArtist(artistPosition: Int): String {
         if (artistPosition == 0)
             return getSectionFromName(artistList[artistPosition].name ?: " ")

ultrasonic/src/main/res/layout/select_artist.xml

@@ -13,18 +13,22 @@
         a:layout_height="0dip"
         a:layout_weight="1.0">
 
-        <androidx.recyclerview.widget.RecyclerView
+        <com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView
             a:id="@+id/select_artist_list"
             a:layout_width="match_parent"
             a:layout_height="match_parent"
             a:paddingTop="8dp"
             a:paddingBottom="8dp"
             a:clipToPadding="false"
-            app:fastScrollEnabled="true"
-            app:fastScrollHorizontalThumbDrawable="@drawable/thumb_drawable"
-            app:fastScrollHorizontalTrackDrawable="@drawable/line_drawable"
-            app:fastScrollVerticalThumbDrawable="@drawable/thumb_drawable"
-            app:fastScrollVerticalTrackDrawable="@drawable/line_drawable" />
+            app:fastScrollAutoHide="true"
+            app:fastScrollAutoHideDelay="2000"
+            app:fastScrollPopupTextSize="28sp"
+            app:fastScrollPopupBackgroundSize="42dp"
+            app:fastScrollPopupBgColor="@color/cyan"
+            app:fastScrollPopupTextColor="@android:color/primary_text_dark"
+            app:fastScrollPopupPosition="adjacent"
+            app:fastScrollTrackColor="@color/dividerColor"
+            app:fastScrollThumbColor="@color/cyan" />
 
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>