added multi language download support

app/src/main/java/com/vanced/manager/core/downloader/MicrogDownloadService.kt

@@ -1,29 +1,30 @@
 package com.vanced.manager.core.downloader
 
-import android.app.DownloadManager
 import android.app.Service
-import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.content.IntentFilter
 import android.os.IBinder
-import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import androidx.preference.PreferenceManager
+import com.downloader.OnDownloadListener
+import com.downloader.OnStartOrResumeListener
+import com.downloader.PRDownloader
+import com.vanced.manager.R
 import com.vanced.manager.core.installer.AppInstaller
-import com.vanced.manager.ui.fragments.HomeFragment
-import com.vanced.manager.utils.DownloadHelper.download
 import com.vanced.manager.utils.InternetTools.baseUrl
+import com.vanced.manager.utils.InternetTools.getFileNameFromUrl
 import com.vanced.manager.utils.InternetTools.getObjectFromJson
+import com.vanced.manager.utils.NotificationHelper
 import com.vanced.manager.utils.NotificationHelper.cancelNotif
+import com.vanced.manager.utils.NotificationHelper.createBasicNotif
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 
 class MicrogDownloadService: Service() {
 
-    private var downloadId: Long = 0
+    //private var downloadId: Long = 0
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-        registerReceiver(receiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
+        //registerReceiver(receiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
         downloadMicrog()
         stopSelf()
         return START_NOT_STICKY
@@ -33,49 +34,60 @@ class MicrogDownloadService: Service() {
         val context = this
         runBlocking {
             launch {
-                //val prefs = getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
+                val prefs = getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
                 val url = getObjectFromJson(
                     "${PreferenceManager.getDefaultSharedPreferences(context)
-                        .getString("install_url", baseUrl)}/microg.json", "url")
+                        .getString("install_url", baseUrl)}/microg.json", "url"
+                )
+
+                //downloadId = download(url, "apk", "microg.apk", this@MicrogDownloadService)
+
+                val channel = 420
+                PRDownloader.download(url, getExternalFilesDir("apk")?.path, "microg.apk")
+                    .build()
+                    .setOnStartOrResumeListener {
+                        OnStartOrResumeListener {
+                            prefs?.edit()?.putBoolean("isMicrogDownloading", true)?.apply()
+                        }
+                    }
+                    .setOnProgressListener { progress ->
+                        val mProgress = progress.currentBytes * 100 / progress.totalBytes
+                        NotificationHelper.displayDownloadNotif(
+                            channel,
+                            mProgress.toInt(),
+                            getFileNameFromUrl(url),
+                            this@MicrogDownloadService
+                        )
+                    }
+                    .start(object : OnDownloadListener {
+                        override fun onDownloadComplete() {
+                            prefs?.edit()?.putBoolean("isMicrogDownloading", false)?.apply()
+                            cancelNotif(channel, this@MicrogDownloadService)
+                            val intent = Intent(this@MicrogDownloadService, AppInstaller::class.java)
+                            intent.putExtra("path", "${getExternalFilesDir("apk")}/microg.apk")
+                            intent.putExtra("pkg", "com.mgoogle.android.gms")
+                            //val mIntent = Intent(HomeFragment.MICROG_DOWNLOADED)
+                            //mIntent.action = HomeFragment.MICROG_DOWNLOADED
+                            //LocalBroadcastManager.getInstance(this@MicrogDownloadService).sendBroadcast(mIntent)
+                            startService(intent)
+                        }
+
+                        override fun onError(error: com.downloader.Error?) {
+                            prefs?.edit()?.putBoolean("isMicrogDownloading", false)?.apply()
+                            createBasicNotif(
+                                getString(R.string.error_downloading, "Microg"),
+                                channel,
+                                this@MicrogDownloadService
+                            )
+                        }
+                    })
 
-                downloadId = download(url, "apk", "microg.apk", this@MicrogDownloadService)
             }
         }
-        /*
-        val channel = 420
-        PRDownloader.download(apkUrl, filesDir.path, "microg.apk")
-            .build()
-            .setOnStartOrResumeListener { OnStartOrResumeListener { prefs?.edit()?.putBoolean("isMicrogDownloading", true)?.apply() } }
-            .setOnProgressListener { progress ->
-                val mProgress = progress.currentBytes * 100 / progress.totalBytes
-                NotificationHelper.displayDownloadNotif(
-                    channel,
-                    mProgress.toInt(),
-                    getFileNameFromUrl(apkUrl),
-                    this
-                )
-            }
-            .start(object : OnDownloadListener {
-                override fun onDownloadComplete() {
-                    prefs?.edit()?.putBoolean("isMicrogDownloading", false)?.apply()
-                    cancelNotif(channel, this@MicrogDownloadService)
-                    val intent = Intent(this@MicrogDownloadService, AppInstaller::class.java)
-                    intent.putExtra("path", "${filesDir.path}/microg.apk")
-                    intent.putExtra("pkg", "com.mgoogle.android.gms")
-                    val mIntent = Intent(HomeFragment.MICROG_DOWNLOADED)
-                    mIntent.action = HomeFragment.MICROG_DOWNLOADED
-                    LocalBroadcastManager.getInstance(this@MicrogDownloadService).sendBroadcast(mIntent)
-                    startService(intent)
-                }
-                override fun onError(error: Error) {
-                    prefs?.edit()?.putBoolean("isMicrogDownloading", false)?.apply()
-                    createBasicNotif(getString(R.string.error_downloading, "Microg"), channel, this@MicrogDownloadService)
-                }
-            })
 
-         */
     }
 
+    /*
     private val receiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
             if (intent?.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1) == downloadId) {
@@ -88,11 +100,12 @@ class MicrogDownloadService: Service() {
             }
         }
     }
+     */
 
     override fun onDestroy() {
         super.onDestroy()
         cancelNotif(420, this)
-        unregisterReceiver(receiver)
+        //unregisterReceiver(receiver)
     }
 
     override fun onBind(intent: Intent?): IBinder? {

app/src/main/java/com/vanced/manager/core/downloader/VancedDownloadService.kt

@@ -1,33 +1,37 @@
 package com.vanced.manager.core.downloader
 
-import android.app.DownloadManager
 import android.app.Service
-import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import android.content.IntentFilter
 import android.os.Build
 import android.os.IBinder
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import androidx.preference.PreferenceManager
+import com.downloader.Error
+import com.downloader.OnDownloadListener
+import com.downloader.OnStartOrResumeListener
+import com.downloader.PRDownloader
+import com.vanced.manager.R
 import com.vanced.manager.core.installer.RootSplitInstallerService
 import com.vanced.manager.core.installer.SplitInstaller
 import com.vanced.manager.ui.fragments.HomeFragment
-import com.vanced.manager.utils.DownloadHelper.download
 import com.vanced.manager.utils.InternetTools.baseUrl
 import com.vanced.manager.utils.InternetTools.getFileNameFromUrl
 import com.vanced.manager.utils.InternetTools.getObjectFromJson
 import com.vanced.manager.utils.NotificationHelper.cancelNotif
+import com.vanced.manager.utils.NotificationHelper.createBasicNotif
+import com.vanced.manager.utils.NotificationHelper.displayDownloadNotif
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 
 class VancedDownloadService: Service() {
 
-    private var downloadId: Long = 0
-    private var apkType: String = "arch"
+    //private var downloadId: Long = 0
+    //private var apkType: String = "arch"
+    private var count: Int = 0
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
-        registerReceiver(receiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
+        //registerReceiver(receiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
         downloadSplits()
         stopSelf()
         return START_NOT_STICKY
@@ -40,12 +44,12 @@ class VancedDownloadService: Service() {
         runBlocking {
             launch {
                 val defPrefs = PreferenceManager.getDefaultSharedPreferences(context)
-                val baseUrl = defPrefs.getString("install_url", baseUrl)
-                val vancedVer = getObjectFromJson("$baseUrl/vanced.json", "version")
+                val insallUrl = defPrefs.getString("install_url", baseUrl)
+                val vancedVer = getObjectFromJson("$installUrl/vanced.json", "version")
 
                 val prefs = getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
-                val variant = PreferenceManager.getDefaultSharedPreferences(context).getString("vanced_variant", "nonroot")
-                val lang = prefs?.getString("lang", "en")
+                val variant = defPrefs.getString("vanced_variant", "nonroot")
+                val lang = prefs?.getString("lang", "en")?.split(", ")?.toTypedArray()
                 val theme = prefs?.getString("theme", "dark")
                 val arch =
                     when {
@@ -55,54 +59,50 @@ class VancedDownloadService: Service() {
                     }
                 val url =
                     when (type) {
-                        "arch" -> "$baseUrl/apks/v$vancedVer/$variant/Arch/split_config.$arch.apk"
-                        "theme" -> "$baseUrl/apks/v$vancedVer/$variant/Theme/$theme.apk"
-                        "lang" -> "$baseUrl/apks/v$vancedVer/$variant/Language/split_config.$lang.apk"
-                        "enlang" -> "$baseUrl/apks/v$vancedVer/$variant/Language/split_config.en.apk"
+                        "arch" -> "$installUrl/apks/v$vancedVer/$variant/Arch/split_config.$arch.apk"
+                        "theme" -> "$installUrl/apks/v$vancedVer/$variant/Theme/$theme.apk"
+                        "lang" -> "$installUrl/apks/v$vancedVer/$variant/Language/split_config.${lang?.get(count)}.apk"
                         else -> throw NotImplementedError("This type of APK is NOT valid. What the hell did you even do?")
                     }
 
-                apkType = type
-                downloadId = download(url, "apks", getFileNameFromUrl(url), this@VancedDownloadService)
-            }
-        }
-        /*
-        val channel = 69
-        PRDownloader
-            .download(url, cacheDir.path, getFileNameFromUrl(url))
-            .build()
-            .setOnStartOrResumeListener { OnStartOrResumeListener { prefs?.edit()?.putBoolean("isVancedDownloading", true)?.apply() } }
-            .setOnProgressListener { progress ->
-                val mProgress = progress.currentBytes * 100 / progress.totalBytes
-                displayDownloadNotif(channel, mProgress.toInt(), getFileNameFromUrl(url), this)
-            }
-            .start(object : OnDownloadListener {
-                override fun onDownloadComplete() {
-                    when (type) {
-                        "arch" -> downloadSplits("theme")
-                        "theme" -> downloadSplits("lang")
-                        "lang" -> {
-                            if (lang == "en") {
-                                prepareInstall(variant!!)
-                                cancelNotif(channel, this@VancedDownloadService)
-                            } else {
-                                downloadSplits("enlang")
+                //apkType = type
+                //downloadId = download(url, "apks", getFileNameFromUrl(url), this@VancedDownloadService)
+
+            val channel = 69
+            PRDownloader
+                .download(url, cacheDir.path, getFileNameFromUrl(url))
+                .build()
+                .setOnStartOrResumeListener { OnStartOrResumeListener { prefs?.edit()?.putBoolean("isVancedDownloading", true)?.apply() } }
+                .setOnProgressListener { progress ->
+                    val mProgress = progress.currentBytes * 100 / progress.totalBytes
+                    displayDownloadNotif(channel, mProgress.toInt(), getFileNameFromUrl(url), this@VancedDownloadService)
+                }
+                .start(object : OnDownloadListener {
+                    override fun onDownloadComplete() {
+                        when (type) {
+                            "arch" -> downloadSplits("theme")
+                            "theme" -> downloadSplits("lang")
+                            "lang" -> {
+                                if (count < lang?.count()!!) {
+                                    count++
+                                    downloadSplits("lang")
+                                } else {
+                                    prepareInstall(variant!!)
+                                    cancelNotif(channel, this@VancedDownloadService)
+                                }
                             }
                         }
-                        "enlang" -> {
-                            prepareInstall(variant!!)
-                            cancelNotif(channel, this@VancedDownloadService)
-                        }
                     }
-                }
 
-                override fun onError(error: Error) {
-                    createBasicNotif(getString(R.string.error_downloading, "Vanced"), channel, this@VancedDownloadService)
-                }
-            })
-         */
+                    override fun onError(error: Error?) {
+                        createBasicNotif(getString(R.string.error_downloading, "Vanced"), channel, this@VancedDownloadService)
+                    }
+                })
+            }
+        }
     }
 
+    /*
     private val receiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
             val prefs = context?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
@@ -128,6 +128,7 @@ class VancedDownloadService: Service() {
             }
         }
     }
+     */
 
     private fun prepareInstall(variant: String) {
         val intent = Intent()
@@ -142,7 +143,7 @@ class VancedDownloadService: Service() {
     override fun onDestroy() {
         super.onDestroy()
         cancelNotif(69, this)
-        unregisterReceiver(receiver)
+        //unregisterReceiver(receiver)
     }
 
     override fun onBind(intent: Intent?): IBinder? {

app/src/main/java/com/vanced/manager/core/fragments/Home.kt

@@ -2,14 +2,11 @@ package com.vanced.manager.core.fragments
 
 import android.content.Context
 import android.content.Intent
-import android.os.Bundle
 import android.util.Log
 import android.view.View
-import android.widget.ImageView
 import android.widget.Toast
 import androidx.navigation.findNavController
 import androidx.preference.PreferenceManager.getDefaultSharedPreferences
-import com.google.android.material.button.MaterialButton
 import com.topjohnwu.superuser.Shell
 import com.vanced.manager.R
 import com.vanced.manager.core.base.BaseFragment
@@ -20,13 +17,6 @@ import com.vanced.manager.utils.PackageHelper.uninstallApk
 
 open class Home : BaseFragment(), View.OnClickListener {
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-
-
-    }
-
     override fun onResume() {
         super.onResume()
         val prefs = activity?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
@@ -39,8 +29,6 @@ open class Home : BaseFragment(), View.OnClickListener {
 
     override fun onClick(v: View?) {
         val prefs = activity?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
-        val isVancedDownloading: Boolean? = prefs?.getBoolean("isVancedDownloading", false)
-        val isMicrogDownloading: Boolean? = prefs?.getBoolean("isMicrogDownloading", false)
         val variant = getDefaultSharedPreferences(activity).getString("vanced_variant", "nonroot")
         val vancedPkgName =
             if (variant == "root") {
@@ -51,32 +39,20 @@ open class Home : BaseFragment(), View.OnClickListener {
 
         when (v?.id) {
             R.id.vanced_installbtn -> {
-                if (!isVancedDownloading!!) {
-                    try {
-                        activity?.cacheDir?.deleteRecursively()
-                    } catch (e: Exception) {
-                        Log.d("VMCache", "Unable to delete cacheDir")
-                    }
-                    if (prefs.getBoolean("valuesModified", false)) {
-                        activity?.startService(
-                            Intent(
-                                activity,
-                                VancedDownloadService::class.java
-                            )
+                if (prefs?.getBoolean("valuesModified", false)!!) {
+                    activity?.startService(
+                        Intent(
+                            activity,
+                            VancedDownloadService::class.java
                         )
-                    } else {
-                        view?.findNavController()?.navigate(R.id.toInstallThemeFragment)
-                    }
+                    )
                 } else {
-                    Toast.makeText(activity, activity?.getString(R.string.installation_wait), Toast.LENGTH_SHORT).show()
+                    view?.findNavController()?.navigate(R.id.toInstallThemeFragment)
                 }
+
             }
             R.id.microg_installbtn -> {
-                if (!isMicrogDownloading!!) {
-                    activity?.startService(Intent(activity, MicrogDownloadService::class.java))
-                } else {
-                    Toast.makeText(activity, activity?.getString(R.string.installation_wait), Toast.LENGTH_SHORT).show()
-                }
+                activity?.startService(Intent(activity, MicrogDownloadService::class.java))
             }
             R.id.microg_uninstallbtn -> activity?.let { uninstallApk("com.mgoogle.android.gms", it) }
             R.id.vanced_uninstallbtn -> activity?.let { uninstallApk(vancedPkgName, it) }

app/src/main/java/com/vanced/manager/core/fragments/LanguageInstall.kt

@@ -1,37 +0,0 @@
-package com.vanced.manager.core.fragments
-
-import android.content.Context
-import android.os.Bundle
-import android.view.View
-import android.widget.Button
-import android.widget.RadioButton
-import android.widget.RadioGroup
-import androidx.navigation.findNavController
-import com.vanced.manager.R
-import com.vanced.manager.core.base.BaseFragment
-
-open class LanguageInstall : BaseFragment() {
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        val finishButton = view.findViewById<Button>(R.id.vanced_install_finish)
-        val langGroup = view.findViewById<RadioGroup>(R.id.lang_radiogroup)
-        val prefs = activity?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
-
-        val langPref = prefs?.getString("lang", "en")
-        val button = langGroup.findViewWithTag<RadioButton>(langPref)
-        button.isChecked = true
-
-        finishButton.setOnClickListener {
-            val selectedLangId = langGroup.checkedRadioButtonId
-            val selectedButton = view.findViewById<RadioButton>(selectedLangId)
-            prefs?.edit()?.putString("lang", selectedButton.tag.toString())?.apply()
-            prefs?.edit()?.putBoolean("isInstalling", true)?.apply()
-            prefs?.edit()?.putBoolean("valuesModified", true)?.apply()
-            view.findNavController().navigate(R.id.action_installTo_homeFragment)
-        }
-
-    }
-
-}

app/src/main/java/com/vanced/manager/core/fragments/ThemeInstall.kt

@@ -1,34 +0,0 @@
-package com.vanced.manager.core.fragments
-
-import android.content.Context
-import android.os.Bundle
-import android.view.View
-import android.widget.Button
-import android.widget.RadioButton
-import android.widget.RadioGroup
-import androidx.navigation.findNavController
-import com.vanced.manager.R
-import com.vanced.manager.core.base.BaseFragment
-
-open class ThemeInstall : BaseFragment() {
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-
-        val nextButton = view.findViewById<Button>(R.id.vanced_next_to_variant)
-        val themeGroup = view.findViewById<RadioGroup>(R.id.theme_radiogroup)
-        val prefs = activity?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
-
-        val themePref = prefs?.getString("theme", "dark")
-        val button = themeGroup.findViewWithTag<RadioButton>(themePref)
-        button.isChecked = true
-
-        nextButton.setOnClickListener {
-            val selectedThemeId = themeGroup.checkedRadioButtonId
-            val selectedButton = view.findViewById<RadioButton>(selectedThemeId)
-            prefs?.edit()?.putString("theme", selectedButton.tag.toString())?.apply()
-            view.findNavController().navigate(R.id.toInstallLanguageFragment)
-        }
-    }
-
-}

app/src/main/java/com/vanced/manager/ui/fragments/VancedLanguageSelectionFragment.kt

@@ -4,10 +4,25 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.ViewGroup.LayoutParams.MATCH_PARENT
+import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
+import android.widget.CheckBox
+import android.widget.LinearLayout
+import androidx.core.content.res.ResourcesCompat
+import androidx.fragment.app.Fragment
+import androidx.navigation.findNavController
+import androidx.preference.PreferenceManager
+import com.beust.klaxon.JsonObject
+import com.beust.klaxon.Parser
+import com.github.kittinunf.fuel.coroutines.awaitString
+import com.github.kittinunf.fuel.httpGet
+import com.google.android.material.button.MaterialButton
 import com.vanced.manager.R
-import com.vanced.manager.core.fragments.LanguageInstall
+import com.vanced.manager.utils.InternetTools.baseUrl
+import kotlinx.coroutines.runBlocking
+import java.util.*
 
-class VancedLanguageSelectionFragment : LanguageInstall() {
+class VancedLanguageSelectionFragment : Fragment() {
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
@@ -17,4 +32,47 @@ class VancedLanguageSelectionFragment : LanguageInstall() {
         return inflater.inflate(R.layout.fragment_vanced_language_selection, container, false)
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        runBlocking {
+            loadBoxes(view.findViewById(R.id.lang_button_ll))
+        }
+        view.findViewById<MaterialButton>(R.id.vanced_install_finish).setOnClickListener {
+            runBlocking {
+                val chosenLangs = mutableListOf("en")
+                for (lang in getLangs()!!) {
+                    if (view.findViewWithTag<CheckBox>(lang).isChecked) {
+                        chosenLangs.add(lang)
+                    }
+                }
+                PreferenceManager.getDefaultSharedPreferences(activity).edit()?.putString("lang", chosenLangs.joinToString())?.apply()
+                view.findNavController().navigate(R.id.action_installTo_homeFragment)
+            }
+
+        }
+    }
+
+    private suspend fun getLangs(): Array<String>? {
+        val langObj = Parser.default().parse(
+            StringBuilder(
+                "https://${PreferenceManager.getDefaultSharedPreferences(activity).getString("update_url", baseUrl)}/vanced.json".httpGet().awaitString()
+            )
+        ) as JsonObject
+        return langObj.array<String>("langs")?.toTypedArray()
+    }
+
+    private suspend fun loadBoxes(ll: LinearLayout) {
+        if (getLangs() != null) {
+            for (lang in getLangs()!!) {
+                val box: CheckBox = CheckBox(activity).apply {
+                    tag = lang
+                    text = Locale(lang).displayLanguage
+                    textSize = 16F
+                    typeface = activity?.let { ResourcesCompat.getFont(it, R.font.exo_bold) }
+                }
+                ll.addView(box, MATCH_PARENT, WRAP_CONTENT)
+            }
+        }
+    }
+
 }

app/src/main/java/com/vanced/manager/ui/fragments/VancedThemeSelectionFragment.kt

@@ -1,13 +1,18 @@
 package com.vanced.manager.ui.fragments
 
+import android.content.Context
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Button
+import android.widget.RadioButton
+import android.widget.RadioGroup
+import androidx.fragment.app.Fragment
+import androidx.navigation.findNavController
 import com.vanced.manager.R
-import com.vanced.manager.core.fragments.ThemeInstall
 
-class VancedThemeSelectionFragment : ThemeInstall() {
+class VancedThemeSelectionFragment : Fragment() {
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
@@ -17,4 +22,19 @@ class VancedThemeSelectionFragment : ThemeInstall() {
         return inflater.inflate(R.layout.fragment_vanced_theme_selection, container, false)
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val nextButton = view.findViewById<Button>(R.id.vanced_next_to_variant)
+        val themeGroup = view.findViewById<RadioGroup>(R.id.theme_radiogroup)
+        val prefs = activity?.getSharedPreferences("installPrefs", Context.MODE_PRIVATE)
+
+        nextButton.setOnClickListener {
+            val selectedThemeId = themeGroup.checkedRadioButtonId
+            val selectedButton = view.findViewById<RadioButton>(selectedThemeId)
+            prefs?.edit()?.putString("theme", selectedButton.tag.toString())?.apply()
+            view.findNavController().navigate(R.id.toInstallLanguageFragment)
+        }
+    }
+
 }

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

@@ -7,221 +7,23 @@
     android:fillViewport="true"
     tools:ignore="HardcodedText">
 
-    <RadioGroup
-        android:id="@+id/lang_radiogroup"
+    <LinearLayout
+        android:id="@+id/lang_button_ll"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:checkedButton="@id/en">
+        android:orientation="vertical">
 
-        <com.google.android.material.radiobutton.MaterialRadioButton
+        <com.google.android.material.checkbox.MaterialCheckBox
             android:id="@+id/en"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:fontFamily="@font/exo_semibold"
             android:text="English (default)"
             android:tag="en"
-            android:textSize="18sp" />
+            android:textSize="18sp"
+            android:checked="true"
+            android:clickable="false"/>
 
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Indonesian"
-            android:tag="in"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Català"
-            android:tag="ca"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Deutsch"
-            android:tag="de"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Español"
-            android:tag="es"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Français"
-            android:tag="fr"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Hrvatski"
-            android:tag="hr"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Italiano"
-            android:tag="it"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Magyar"
-            android:tag="hu"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Dutch"
-            android:tag="nl"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Polski"
-            android:tag="pl"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Português (Brasil)"
-            android:tag="pt"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Română"
-            android:tag="ro"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Suomi"
-            android:tag="fi"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Svenska"
-            android:tag="sv"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Tiếng Việt"
-            android:tag="vi"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Türkçe"
-            android:tag="tr"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Ελληνικά"
-            android:tag="hy"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Български"
-            android:tag="bg"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Русский"
-            android:tag="ru"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="Українська"
-            android:tag="uk"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="العربية"
-            android:tag="ar"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="ქართული"
-            android:tag="ka"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="日本語"
-            android:tag="ja"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="繁體中文"
-            android:tag="zh"
-            android:textSize="18sp" />
-
-        <com.google.android.material.radiobutton.MaterialRadioButton
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:fontFamily="@font/exo_semibold"
-            android:text="한국어"
-            android:tag="ko"
-            android:textSize="18sp" />
-
-    </RadioGroup>
+    </LinearLayout>
 
 </androidx.core.widget.NestedScrollView>