Glimpse: Simplify favorite button drawable handling

Change-Id: I1cabdd7c0596f3046ebbb0d28547a232c6192c4f

app/src/main/java/org/lineageos/glimpse/fragments/MediaViewerFragment.kt

@@ -140,14 +140,7 @@ class MediaViewerFragment : Fragment(
 
             dateTextView.text = dateFormatter.format(media.dateAdded)
             timeTextView.text = timeFormatter.format(media.dateAdded)
-
-            favoriteButton.setImageResource(
-                if (media.isFavorite) {
-                    R.drawable.ic_star
-                } else {
-                    R.drawable.ic_star_border
-                }
-            )
+            favoriteButton.isSelected = media.isFavorite
         }
     }
 
@@ -180,13 +173,7 @@ class MediaViewerFragment : Fragment(
 
         favoriteButton.setOnClickListener {
             mediaViewerAdapter.getMediaFromMediaStore(viewPager.currentItem)?.let {
-                favoriteButton.setImageResource(
-                    if (!it.isFavorite) {
-                        R.drawable.ic_star
-                    } else {
-                        R.drawable.ic_star_border
-                    }
-                )
+                favoriteButton.isSelected = !it.isFavorite
 
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                     noopContract.launch(

app/src/main/res/drawable/ic_star_toggle.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     SPDX-FileCopyrightText: 2023 The LineageOS Project
+     SPDX-License-Identifier: Apache-2.0
+-->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/ic_star_border" android:state_selected="false" />
+    <item android:drawable="@drawable/ic_star" android:state_selected="true" />
+</selector>

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

@@ -78,7 +78,7 @@
         <ImageButton
             android:id="@+id/favoriteButton"
             style="@style/Theme.Glimpse.MediaViewer.BottomSheet.Button"
-            android:src="@drawable/ic_star_border" />
+            android:src="@drawable/ic_star_toggle" />
 
         <ImageButton
             android:id="@+id/shareButton"