feat: add per app language for devices running Android 13+ (#353)

app/phone/src/main/AndroidManifest.xml

@@ -17,6 +17,7 @@
         android:fullBackupOnly="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:localeConfig="@xml/locales_config"
         android:networkSecurityConfig="@xml/network_security_config"
         android:supportsRtl="true"
         android:theme="@style/Theme.Findroid">
@@ -48,8 +49,7 @@
         <provider
             android:name="androidx.startup.InitializationProvider"
             android:authorities="${applicationId}.androidx-startup"
-            tools:node="remove">
-        </provider>
+            tools:node="remove" />
     </application>
 
 </manifest>

app/phone/src/main/java/dev/jdtech/jellyfin/fragments/SettingsLanguageFragment.kt

@@ -1,6 +1,11 @@
 package dev.jdtech.jellyfin.fragments
 
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.provider.Settings
+import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import dev.jdtech.jellyfin.core.R as CoreR
 
@@ -8,5 +13,18 @@ import dev.jdtech.jellyfin.core.R as CoreR
 class SettingsLanguageFragment : PreferenceFragmentCompat() {
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         setPreferencesFromResource(CoreR.xml.fragment_settings_language, rootKey)
+        findPreference<Preference>("pref_app_language")?.apply {
+            isVisible = Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
+            summary = requireContext().resources.configuration.locales.get(0).displayName
+            setOnPreferenceClickListener {
+                startActivity(
+                    Intent(
+                        Settings.ACTION_APP_LOCALE_SETTINGS,
+                        Uri.parse("package:${requireContext().packageName}")
+                    )
+                )
+                true
+            }
+        }
     }
 }

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

@@ -60,6 +60,7 @@
     <string name="settings_category_language">Language</string>
     <string name="settings_preferred_audio_language">Preferred audio language</string>
     <string name="settings_preferred_subtitle_language">Preferred subtitle language</string>
+    <string name="app_language">App language</string>
     <string name="initializing">Initializing…</string>
     <string name="settings_category_servers">Servers</string>
     <string name="settings_category_player">Player</string>

core/src/main/res/xml/fragment_settings_language.xml

@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
+    <Preference
+        app:icon="@drawable/ic_languages"
+        app:isPreferenceVisible="false"
+        app:key="pref_app_language"
+        app:title="@string/app_language" />
+
     <ListPreference
         app:defaultValue="null"
         app:entries="@array/languages"

core/src/main/res/xml/locales_config.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<locale-config xmlns:android="http://schemas.android.com/apk/res/android">
+    <locale android:name="es-r419" /> <!-- Spanish (Latin America) -->
+    <locale android:name="bg"/> <!-- Bulgarian -->
+    <locale android:name="cs"/> <!-- Czech -->
+    <locale android:name="de"/> <!-- German -->
+    <locale android:name="en"/> <!-- English -->
+    <locale android:name="es"/> <!-- Spanish (Spain) -->
+    <locale android:name="es-MX"/> <!-- Spanish (Mexico) -->
+    <locale android:name="fr"/> <!-- French (France) -->
+    <locale android:name="hu"/> <!-- Hungarian -->
+    <locale android:name="it"/> <!-- Italian -->
+    <locale android:name="iw"/> <!-- Hebrew -->
+    <locale android:name="ko"/> <!-- Korean -->
+    <locale android:name="nl"/> <!-- Dutch -->
+    <locale android:name="pl"/> <!-- Polish -->
+    <locale android:name="pt"/> <!-- Portuguese -->
+    <locale android:name="pt-BR"/> <!-- Portuguese (Brazil) -->
+    <locale android:name="ru"/> <!-- Russian -->
+    <locale android:name="sk"/> <!-- Slovak -->
+    <locale android:name="sl"/> <!-- Slovenian -->
+    <locale android:name="sv"/> <!-- Swedish -->
+    <locale android:name="vi"/> <!-- Vietnamese -->
+    <locale android:name="yue"/> <!-- Yue Chinese -->
+    <locale android:name="zh-CN"/> <!-- Chinese (Simplified) -->
+    <locale android:name="zh-TW"/> <!-- Chinese (Traditional) -->
+</locale-config>