Add basic transitions/animations

Add animations to all LoadingFragment & a transition from LoadingFragment to MainFragment.

app/build.gradle

@@ -66,6 +66,7 @@ dependencies {
     implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
 
     // --- THIRD PARTY ---
+
     // Image loading
     implementation 'io.coil-kt:coil:0.12.0'
 

app/src/main/java/org/oxycblt/auxio/loading/LoadingFragment.kt

@@ -3,6 +3,7 @@ package org.oxycblt.auxio.loading
 import android.Manifest
 import android.content.pm.PackageManager
 import android.os.Bundle
+import android.transition.TransitionInflater
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
@@ -67,8 +68,9 @@ class LoadingFragment : Fragment(R.layout.fragment_loading) {
 
         // Set up the permission launcher, as its disallowed outside of onCreate.
         permLauncher =
-            registerForActivityResult(ActivityResultContracts.RequestPermission()) { granted: Boolean ->
+            registerForActivityResult(
-
+                ActivityResultContracts.RequestPermission()
+            ) { granted: Boolean ->
                 // If its actually granted, restart the loading process again.
                 if (granted) {
                     wipeViews()
@@ -92,8 +94,8 @@ class LoadingFragment : Fragment(R.layout.fragment_loading) {
     }
 
     // Check for two things:
-    // - If Auxio needs to show the rationale for getting the READ_EXTERNAL_STORAGE perm
+    // - If Auxio needs to show the rationale for getting the READ_EXTERNAL_STORAGE permission.
-    // - If Auxio straight up doesnt have the permission
+    // - If Auxio straight up doesn't have the READ_EXTERNAL_STORAGE permission.
     private fun checkPerms(): Boolean {
         return shouldShowRequestPermissionRationale(
             Manifest.permission.READ_EXTERNAL_STORAGE
@@ -108,6 +110,9 @@ class LoadingFragment : Fragment(R.layout.fragment_loading) {
         repoResponse?.let { response ->
 
             if (response == MusicLoaderResponse.DONE) {
+                val inflater = TransitionInflater.from(requireContext())
+                exitTransition = inflater.inflateTransition(R.transition.transition_to_main)
+
                 this.findNavController().navigate(
                     LoadingFragmentDirections.actionToMain()
                 )

app/src/main/java/org/oxycblt/auxio/music/MusicRepository.kt

@@ -34,9 +34,9 @@ class MusicRepository {
                 loader.albums,
                 loader.songs,
 
-                app.applicationContext.getString(R.string.placeholder_unknown_genre),
+                app.getString(R.string.placeholder_unknown_genre),
-                app.applicationContext.getString(R.string.placeholder_unknown_artist),
+                app.getString(R.string.placeholder_unknown_artist),
-                app.applicationContext.getString(R.string.placeholder_unknown_album)
+                app.getString(R.string.placeholder_unknown_album)
             )
 
             songs = sorter.songs.toList()

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

@@ -13,6 +13,7 @@
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:animateLayoutChanges="true"
         android:background="@drawable/ripple"
         android:clickable="true"
         android:focusable="true"

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

@@ -14,7 +14,8 @@
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:animateLayoutChanges="true">
 
         <ProgressBar
             android:id="@+id/loading_bar"

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

@@ -13,6 +13,7 @@
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:animateLayoutChanges="true"
         android:background="@drawable/ripple"
         android:clickable="true"
         android:focusable="true"

app/src/main/res/transition/transition_to_main.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<fade xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="@android:integer/config_longAnimTime">
+</fade>

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

@@ -7,7 +7,7 @@
 
     <string name="error_no_music">No music found.</string>
     <string name="error_music_load_failed">Music loading failed.</string>
-    <string name="error_no_perms">Auxio needs access to your music library.</string>
+    <string name="error_no_perms">Auxio needs permission to access to your music library.</string>
 
     <string name="label_retry">Retry</string>
     <string name="label_grant">Grant</string>