Added an option to change the language

app/src/main/java/com/github/libretube/MainActivity.kt

@@ -2,6 +2,7 @@ package com.github.libretube
 
 import android.app.Activity
 import android.content.Context
+import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.content.res.Configuration
 import android.net.Uri
@@ -27,6 +28,7 @@ import androidx.navigation.ui.setupWithNavController
 import androidx.preference.PreferenceManager
 import com.google.android.material.color.DynamicColors
 import java.lang.Exception
+import java.util.*
 
 class MainActivity : AppCompatActivity() {
     val TAG = "MainActivity"
@@ -40,6 +42,15 @@ class MainActivity : AppCompatActivity() {
         RetrofitInstance.url = sharedPreferences.getString("instance", "https://pipedapi.kavin.rocks/")!!
         DynamicColors.applyToActivitiesIfAvailable(application)
         setContentView(R.layout.activity_main)
+        var languageName = sharedPreferences.getString("language", "en")!!
+        if (languageName != "") {
+            val locale = Locale("$languageName")
+            val res = resources
+            val dm = res.displayMetrics
+            val conf = res.configuration
+            conf.locale = locale
+            res.updateConfiguration(conf, dm)
+        }
         when (sharedPreferences.getString("theme_togglee", "A")!!) {
             "A" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
             "L" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)

app/src/main/java/com/github/libretube/Settings.kt

@@ -8,6 +8,7 @@ import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
+import android.os.LocaleList
 import android.text.TextUtils
 import android.util.Log
 import android.widget.Toast
@@ -16,6 +17,7 @@ import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
+import androidx.core.os.LocaleListCompat
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.lifecycleScope
 import androidx.preference.ListPreference
@@ -27,8 +29,10 @@ import org.json.JSONTokener
 import retrofit2.HttpException
 import java.io.IOException
 import java.io.InputStream
+import java.util.*
 import java.util.zip.ZipEntry
 import java.util.zip.ZipInputStream
+import kotlin.collections.ArrayList
 
 
 class Settings : PreferenceFragmentCompat() {
@@ -189,6 +193,24 @@ class Settings : PreferenceFragmentCompat() {
             }
             true
         }
+
+        val changeLanguage = findPreference<ListPreference>("language")
+        changeLanguage?.setOnPreferenceChangeListener { _, languageName ->
+            val locale = Locale("$languageName")
+            val res = resources
+            val dm = res.displayMetrics
+            val conf = res.configuration
+            conf.locale = locale
+            res.updateConfiguration(conf, dm)
+            val refresh = Intent(
+                context,
+                MainActivity::class.java
+            )
+            refresh.putExtra("$languageName", "$languageName")
+            startActivity(refresh)
+            true
+        }
+
         val about = findPreference<Preference>("about")
         about?.setOnPreferenceClickListener {
             val uri = Uri.parse("https://libre-tube.github.io/")

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

@@ -405,6 +405,50 @@
         <item>ZW</item>
     </string-array>
 
+    <string-array name="languages">
+        <item>Arabic</item>
+        <item>Czech</item>
+        <item>English</item>
+        <item>French</item>
+        <item>German</item>
+        <item>Hindi</item>
+        <item>Hungarian</item>
+        <item>Italian</item>
+        <item>Korean</item>
+        <item>Marathi</item>
+        <item>Norwegian</item>
+        <item>Persian</item>
+        <item>Polish</item>
+        <item>Portuguese</item>
+        <item>Portuguese (Brazil)</item>
+        <item>Russian</item>
+        <item>Sorani</item>
+        <item>Spanish</item>
+        <item>Turkish</item>
+    </string-array>
+
+    <string-array name="languagesValue">
+        <item>ar</item>
+        <item>cs</item>
+        <item>en</item>
+        <item>fr</item>
+        <item>de</item>
+        <item>hi</item>
+        <item>hu</item>
+        <item>it</item>
+        <item>ko</item>
+        <item>mr</item>
+        <item>nb-rNO</item>
+        <item>ckb</item>
+        <item>pl</item>
+        <item>pt</item>
+        <item>pr-rBR</item>
+        <item>ru</item>
+        <item>fa</item>
+        <item>es</item>
+        <item>tr</item>
+    </string-array>
+
     <string-array name="themes">
         <item>System Default</item>
         <item>Light Theme</item>

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

@@ -53,4 +53,5 @@
     <string name="success">Success!</string>
     <string name="fail">Failed :(</string>
     <string name="about">About</string>
+    <string name="changeLanguage">Change Language</string>
 </resources>

app/src/main/res/xml/settings.xml

@@ -11,6 +11,16 @@
         android:icon="@drawable/ic_language"
         />
 
+    <ListPreference
+        app:key="language"
+        app:title="@string/changeLanguage"
+        app:entries="@array/languages"
+        app:entryValues="@array/languagesValue"
+        app:defaultValue="en"
+        app:useSimpleSummaryProvider="true"
+        android:icon="@drawable/ic_language"
+        />
+
     <ListPreference
         app:key="instance"
         app:title="@string/instances"