Add WebDAV backup and restore functionality

Introduces a new BackupActivity for configuration backup and restore, supporting both local storage and WebDAV servers. Adds WebDavManager and WebDavConfig for handling WebDAV operations, updates the navigation drawer and menu, and refactors AboutActivity to remove backup/restore logic. Includes new layouts and string resources for backup options and WebDAV settings.

V2rayNG/app/build.gradle.kts

@@ -158,6 +158,7 @@ dependencies {
     // Data and Storage Libraries
     implementation(libs.mmkv.static)
     implementation(libs.gson)
+    implementation(libs.okhttp)
 
     // Reactive and Utility Libraries
     implementation(libs.kotlinx.coroutines.android)

V2rayNG/app/src/main/AndroidManifest.xml

@@ -146,6 +146,9 @@
         <activity
             android:name=".ui.CheckUpdateActivity"
             android:exported="false" />
+        <activity
+            android:name=".ui.BackupActivity"
+            android:exported="false" />
         <activity
             android:name=".ui.AboutActivity"
             android:exported="false" />

V2rayNG/app/src/main/java/com/v2ray/ang/dto/WebDavConfig.kt

@@ -0,0 +1,9 @@
+package com.v2ray.ang.dto
+
+data class WebDavConfig(
+    val baseUrl: String,
+    val username: String? = null,
+    val password: String? = null,
+    val remoteBasePath: String = "/",
+    val timeoutSeconds: Long = 30
+)

V2rayNG/app/src/main/java/com/v2ray/ang/handler/MmkvManager.kt

@@ -4,6 +4,7 @@ import com.tencent.mmkv.MMKV
 import com.v2ray.ang.AppConfig.PREF_IS_BOOTED
 import com.v2ray.ang.AppConfig.PREF_ROUTING_RULESET
 import com.v2ray.ang.dto.AssetUrlItem
+import com.v2ray.ang.dto.WebDavConfig
 import com.v2ray.ang.dto.ProfileItem
 import com.v2ray.ang.dto.RulesetItem
 import com.v2ray.ang.dto.ServerAffiliationInfo
@@ -27,6 +28,7 @@ object MmkvManager {
     private const val KEY_SELECTED_SERVER = "SELECTED_SERVER"
     private const val KEY_ANG_CONFIGS = "ANG_CONFIGS"
     private const val KEY_SUB_IDS = "SUB_IDS"
+    private const val KEY_WEBDAV_CONFIG = "WEBDAV_CONFIG"
 
     //private val profileStorage by lazy { MMKV.mmkvWithID(ID_PROFILE_CONFIG, MMKV.MULTI_PROCESS_MODE) }
     private val mainStorage by lazy { MMKV.mmkvWithID(ID_MAIN, MMKV.MULTI_PROCESS_MODE) }
@@ -468,6 +470,7 @@ object MmkvManager {
 
     //endregion
 
+    //region settings
     /**
      * Encodes the settings.
      *
@@ -588,4 +591,22 @@ object MmkvManager {
 
     //endregion
 
+    //region WebDAV
+
+    /**
+     * Encodes the WebDAV config as JSON into settings storage.
+     */
+    fun encodeWebDavConfig(config: WebDavConfig): Boolean {
+        return settingsStorage.encode(KEY_WEBDAV_CONFIG, JsonUtil.toJson(config))
+    }
+
+    /**
+     * Decodes the WebDAV config from settings storage.
+     */
+    fun decodeWebDavConfig(): WebDavConfig? {
+        val json = settingsStorage.decodeString(KEY_WEBDAV_CONFIG) ?: return null
+        return JsonUtil.fromJson(json, WebDavConfig::class.java)
+    }
+
+    //endregion
 }

V2rayNG/app/src/main/java/com/v2ray/ang/handler/WebDavManager.kt

@@ -0,0 +1,187 @@
+package com.v2ray.ang.handler
+
+import android.util.Log
+import com.v2ray.ang.AppConfig
+import com.v2ray.ang.dto.WebDavConfig
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import okhttp3.Credentials
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.RequestBody.Companion.asRequestBody
+import java.io.File
+import java.io.FileOutputStream
+import java.net.URL
+import java.util.concurrent.TimeUnit
+
+object WebDavManager {
+    private var cfg: WebDavConfig? = null
+    private var client: OkHttpClient? = null
+
+    /**
+     * Initialize the WebDAV manager with a configuration and build an OkHttp client.
+     *
+     * @param config WebDavConfig containing baseUrl, credentials, remoteBasePath and timeoutSeconds.
+     */
+    fun init(config: WebDavConfig) {
+        cfg = config
+        client = OkHttpClient.Builder()
+            .connectTimeout(config.timeoutSeconds, TimeUnit.SECONDS)
+            .readTimeout(config.timeoutSeconds, TimeUnit.SECONDS)
+            .writeTimeout(config.timeoutSeconds, TimeUnit.SECONDS)
+            .callTimeout(config.timeoutSeconds, TimeUnit.SECONDS)
+            .build()
+    }
+
+    /**
+     * Upload a local file to a remote relative path under the configured remoteBasePath.
+     * The provided `remoteRelativePath` should be relative (e.g. "backup_ng.zip").
+     * The method will attempt to create parent directories via MKCOL before PUT.
+     *
+     * @param localFile File to upload.
+     * @param remoteRelativePath Remote path relative to configured remoteBasePath.
+     * @return true if upload succeeded (HTTP 2xx), false otherwise.
+     */
+    suspend fun uploadFile(localFile: File, remoteRelativePath: String): Boolean = withContext(Dispatchers.IO) {
+        try {
+            val cl = client ?: return@withContext false
+            val remote = buildRemoteUrl(remoteRelativePath)
+
+            // Ensure parent directories exist
+            val dirPath = remote.substringBeforeLast('/')
+            if (dirPath != remote) {
+                ensureRemoteDirs(dirPath)
+            }
+
+            // Determine content type based on file extension
+            val mediaType = when (localFile.extension.lowercase()) {
+                "zip" -> "application/zip"
+                "json" -> "application/json"
+                "txt" -> "text/plain"
+                else -> "application/octet-stream"
+            }.toMediaTypeOrNull()
+
+            val body = localFile.asRequestBody(mediaType)
+            val req = applyAuth(Request.Builder().url(remote).put(body)).build()
+            cl.newCall(req).execute().use { resp ->
+                val success = resp.isSuccessful
+                if (success) {
+                    Log.i(AppConfig.TAG, "WebDAV upload success: $remoteRelativePath")
+                } else {
+                    Log.e(AppConfig.TAG, "WebDAV upload failed: $remoteRelativePath (HTTP ${resp.code})")
+                }
+                return@withContext success
+            }
+        } catch (e: Exception) {
+            Log.e(AppConfig.TAG, "WebDAV upload exception: $remoteRelativePath", e)
+            return@withContext false
+        }
+    }
+
+    /**
+     * Download a remote file (relative to configured remoteBasePath) into a local file.
+     *
+     * @param remoteRelativePath Remote path relative to configured remoteBasePath.
+     * @param destFile Local destination file to write to.
+     * @return true if download and write succeeded, false otherwise.
+     */
+    suspend fun downloadFile(remoteRelativePath: String, destFile: File): Boolean = withContext(Dispatchers.IO) {
+        try {
+            val cl = client ?: return@withContext false
+            val remote = buildRemoteUrl(remoteRelativePath)
+            val req = applyAuth(Request.Builder().url(remote).get()).build()
+            cl.newCall(req).execute().use { resp ->
+                if (!resp.isSuccessful) {
+                    Log.e(AppConfig.TAG, "WebDAV download failed: $remoteRelativePath (HTTP ${resp.code})")
+                    return@withContext false
+                }
+
+                val body = resp.body
+                if (body == null) {
+                    Log.e(AppConfig.TAG, "WebDAV download failed: $remoteRelativePath (empty response body)")
+                    return@withContext false
+                }
+
+                body.byteStream().use { input ->
+                    destFile.parentFile?.mkdirs()
+                    FileOutputStream(destFile).use { fos ->
+                        input.copyTo(fos)
+                    }
+                }
+
+                Log.i(AppConfig.TAG, "WebDAV download success: $remoteRelativePath")
+                return@withContext true
+            }
+        } catch (e: Exception) {
+            Log.e(AppConfig.TAG, "WebDAV download exception: $remoteRelativePath", e)
+            return@withContext false
+        }
+    }
+
+    /**
+     * Build a full remote URL by combining the configured base URL, the configured
+     * remote base path and a relative path provided by the caller.
+     *
+     * Example: baseUrl="https://example.com/remote.php/dav", remoteBasePath="backups",
+     * remoteRelativePath="backup_ng.zip" => "https://example.com/remote.php/dav/backups/backup_ng.zip"
+     *
+     * @param remoteRelativePath A path relative to the configured remoteBasePath (no leading slash required).
+     * @return Full URL string used for HTTP operations.
+     */
+    private fun buildRemoteUrl(remoteRelativePath: String): String {
+        val base = cfg?.baseUrl?.trimEnd('/') ?: ""
+        val basePath = cfg?.remoteBasePath?.trim('/') ?: ""
+        val rel = remoteRelativePath.trimStart('/')
+        return if (basePath.isEmpty()) "$base/$rel" else "$base/$basePath/$rel"
+    }
+
+    /**
+     * Apply HTTP Basic authentication headers to the given request builder when
+     * username is configured in `cfg`.
+     *
+     * @param builder OkHttp Request.Builder to modify.
+     * @return The same builder instance with Authorization header applied if credentials exist.
+     */
+    private fun applyAuth(builder: Request.Builder): Request.Builder {
+        val username = cfg?.username
+        val password = cfg?.password
+        if (!username.isNullOrEmpty()) {
+            builder.header("Authorization", Credentials.basic(username, password ?: ""))
+        }
+        return builder
+    }
+
+    /**
+     * Ensure that each directory segment in the given directory URL exists on the
+     * WebDAV server. This issues MKCOL requests for each segment in a best-effort
+     * manner and ignores errors for segments that already exist.
+     *
+     * @param dirUrl Absolute URL to the directory that should exist (e.g. https://.../backups)
+     */
+    private fun ensureRemoteDirs(dirUrl: String) {
+        try {
+            val cl = client ?: return
+            val url = URL(dirUrl)
+            val segments = url.path.split("/").filter { it.isNotEmpty() }
+            var accum = ""
+            for (seg in segments) {
+                accum += "/$seg"
+                val mkUrl = URL(url.protocol, url.host, if (url.port == -1) -1 else url.port, accum).toString()
+                try {
+                    val req = applyAuth(Request.Builder().url(mkUrl).method("MKCOL", null)).build()
+                    cl.newCall(req).execute().use { resp ->
+                        // 201 Created or 405 Method Not Allowed (already exists) are acceptable
+                        if (resp.code != 201 && resp.code != 405 && resp.code != 409) {
+                            Log.w(AppConfig.TAG, "WebDAV MKCOL $mkUrl returned ${resp.code}")
+                        }
+                    }
+                } catch (ignored: Exception) {
+                    // best-effort, continue
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(AppConfig.TAG, "WebDAV ensureRemoteDirs error", e)
+        }
+    }
+}

V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt

@@ -1,126 +1,22 @@
 package com.v2ray.ang.ui
 
-import android.Manifest
-import android.content.Intent
-import android.os.Build
 import android.os.Bundle
-import android.util.Log
-import androidx.activity.result.contract.ActivityResultContracts
-import androidx.core.content.ContextCompat
-import androidx.core.content.FileProvider
-import com.tencent.mmkv.MMKV
 import com.v2ray.ang.AppConfig
 import com.v2ray.ang.BuildConfig
 import com.v2ray.ang.R
 import com.v2ray.ang.databinding.ActivityAboutBinding
-import com.v2ray.ang.extension.toast
-import com.v2ray.ang.extension.toastError
-import com.v2ray.ang.extension.toastSuccess
 import com.v2ray.ang.handler.SpeedtestManager
 import com.v2ray.ang.util.Utils
-import com.v2ray.ang.util.ZipUtil
-import java.io.File
-import java.text.SimpleDateFormat
-import java.util.Locale
 
 class AboutActivity : BaseActivity() {
-
     private val binding by lazy { ActivityAboutBinding.inflate(layoutInflater) }
 
-    private val requestPermissionLauncher =
-        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
-            if (isGranted) {
-                try {
-                    showFileChooser()
-                } catch (e: Exception) {
-                    Log.e(AppConfig.TAG, "Failed to show file chooser", e)
-                }
-            } else {
-                toast(R.string.toast_permission_denied)
-            }
-        }
-
-    private val createBackupFile =
-        registerForActivityResult(ActivityResultContracts.CreateDocument("application/zip")) { uri ->
-            if (uri != null) {
-                try {
-                    val ret = backupConfigurationToCache()
-                    if (ret.first) {
-                        // Copy the cached zip file to user-selected location
-                        contentResolver.openOutputStream(uri)?.use { output ->
-                            File(ret.second).inputStream().use { input ->
-                                input.copyTo(output)
-                            }
-                        }
-                        // Clean up cache file
-                        File(ret.second).delete()
-                        toastSuccess(R.string.toast_success)
-                    } else {
-                        toastError(R.string.toast_failure)
-                    }
-                } catch (e: Exception) {
-                    Log.e(AppConfig.TAG, "Failed to backup configuration", e)
-                    toastError(R.string.toast_failure)
-                }
-            }
-        }
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(binding.root)
 
         title = getString(R.string.title_about)
 
-        binding.layoutBackup.setOnClickListener {
-            val dateFormatted = SimpleDateFormat(
-                "yyyy-MM-dd-HH-mm-ss",
-                Locale.getDefault()
-            ).format(System.currentTimeMillis())
-            val defaultFileName = "${getString(R.string.app_name)}_${dateFormatted}.zip"
-            
-            // Let user choose where to save the backup file
-            createBackupFile.launch(defaultFileName)
-        }
-
-        binding.layoutShare.setOnClickListener {
-            val ret = backupConfigurationToCache()
-            if (ret.first) {
-                startActivity(
-                    Intent.createChooser(
-                        Intent(Intent.ACTION_SEND).setType("application/zip")
-                            .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
-                            .putExtra(
-                                Intent.EXTRA_STREAM,
-                                FileProvider.getUriForFile(
-                                    this, BuildConfig.APPLICATION_ID + ".cache", File(ret.second)
-                                )
-                            ), getString(R.string.title_configuration_share)
-                    )
-                )
-            } else {
-                toastError(R.string.toast_failure)
-            }
-        }
-
-        binding.layoutRestore.setOnClickListener {
-            val permission =
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-                    Manifest.permission.READ_MEDIA_IMAGES
-                } else {
-                    Manifest.permission.READ_EXTERNAL_STORAGE
-                }
-
-            if (ContextCompat.checkSelfPermission(this, permission) == android.content.pm.PackageManager.PERMISSION_GRANTED) {
-                try {
-                    showFileChooser()
-                } catch (e: Exception) {
-                    Log.e(AppConfig.TAG, "Failed to show file chooser", e)
-                }
-            } else {
-                requestPermissionLauncher.launch(permission)
-            }
-        }
-
         binding.layoutSoureCcode.setOnClickListener {
             Utils.openUri(this, AppConfig.APP_URL)
         }
@@ -154,78 +50,4 @@ class AboutActivity : BaseActivity() {
             binding.tvAppId.text = it
         }
     }
-
-    /**
-     * Backup configuration to cache directory
-     * Returns Pair<success, zipFilePath>
-     */
-    private fun backupConfigurationToCache(): Pair<Boolean, String> {
-        val dateFormatted = SimpleDateFormat(
-            "yyyy-MM-dd-HH-mm-ss",
-            Locale.getDefault()
-        ).format(System.currentTimeMillis())
-        val folderName = "${getString(R.string.app_name)}_${dateFormatted}"
-        val backupDir = this.cacheDir.absolutePath + "/$folderName"
-        val outputZipFilePath = "${this.cacheDir.absolutePath}/$folderName.zip"
-
-        val count = MMKV.backupAllToDirectory(backupDir)
-        if (count <= 0) {
-            return Pair(false, "")
-        }
-
-        if (ZipUtil.zipFromFolder(backupDir, outputZipFilePath)) {
-            return Pair(true, outputZipFilePath)
-        } else {
-            return Pair(false, "")
-        }
-    }
-
-    private fun restoreConfiguration(zipFile: File): Boolean {
-        val backupDir = this.cacheDir.absolutePath + "/${System.currentTimeMillis()}"
-
-        if (!ZipUtil.unzipToFolder(zipFile, backupDir)) {
-            return false
-        }
-
-        val count = MMKV.restoreAllFromDirectory(backupDir)
-        return count > 0
-    }
-
-    private fun showFileChooser() {
-        val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
-            type = "*/*"
-            addCategory(Intent.CATEGORY_OPENABLE)
-        }
-
-        try {
-            chooseFile.launch(Intent.createChooser(intent, getString(R.string.title_file_chooser)))
-        } catch (ex: android.content.ActivityNotFoundException) {
-            Log.e(AppConfig.TAG, "File chooser activity not found", ex)
-            toast(R.string.toast_require_file_manager)
-        }
-    }
-
-    private val chooseFile =
-        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
-            val uri = result.data?.data
-            if (result.resultCode == RESULT_OK && uri != null) {
-                try {
-                    val targetFile =
-                        File(this.cacheDir.absolutePath, "${System.currentTimeMillis()}.zip")
-                    contentResolver.openInputStream(uri).use { input ->
-                        targetFile.outputStream().use { fileOut ->
-                            input?.copyTo(fileOut)
-                        }
-                    }
-                    if (restoreConfiguration(targetFile)) {
-                        toastSuccess(R.string.toast_success)
-                    } else {
-                        toastError(R.string.toast_failure)
-                    }
-                } catch (e: Exception) {
-                    Log.e(AppConfig.TAG, "Error during file restore", e)
-                    toastError(R.string.toast_failure)
-                }
-            }
-        }
 }

V2rayNG/app/src/main/java/com/v2ray/ang/ui/BackupActivity.kt

@@ -0,0 +1,361 @@
+package com.v2ray.ang.ui
+
+import android.Manifest
+import android.app.AlertDialog
+import android.content.ActivityNotFoundException
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Bundle
+import android.util.Log
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.core.content.ContextCompat
+import androidx.core.content.FileProvider
+import com.tencent.mmkv.MMKV
+import com.v2ray.ang.AppConfig
+import com.v2ray.ang.BuildConfig
+import com.v2ray.ang.R
+import com.v2ray.ang.extension.toast
+import com.v2ray.ang.extension.toastError
+import com.v2ray.ang.extension.toastSuccess
+import com.v2ray.ang.handler.WebDavManager
+import com.v2ray.ang.handler.MmkvManager
+import com.v2ray.ang.dto.WebDavConfig
+import androidx.lifecycle.lifecycleScope
+import com.v2ray.ang.databinding.ActivityBackupBinding
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import com.v2ray.ang.databinding.DialogWebdavBinding
+import com.v2ray.ang.util.ZipUtil
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+class BackupActivity : BaseActivity() {
+    private val binding by lazy { ActivityBackupBinding.inflate(layoutInflater) }
+
+    private val config_backup_options: Array<out String> by lazy {
+        resources.getStringArray(R.array.config_backup_options)
+    }
+
+    companion object {
+        private const val BACKUP_FILE_NAME = "backup_ng.zip"
+    }
+
+    private val requestPermissionLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
+            if (isGranted) {
+                try {
+                    showFileChooser()
+                } catch (e: Exception) {
+                    Log.e(AppConfig.TAG, "Failed to show file chooser", e)
+                }
+            } else {
+                toast(R.string.toast_permission_denied)
+            }
+        }
+
+    private val createBackupFile =
+        registerForActivityResult(ActivityResultContracts.CreateDocument("application/zip")) { uri ->
+            if (uri != null) {
+                try {
+                    val ret = backupConfigurationToCache()
+                    if (ret.first) {
+                        // Copy the cached zip file to user-selected location
+                        contentResolver.openOutputStream(uri)?.use { output ->
+                            File(ret.second).inputStream().use { input ->
+                                input.copyTo(output)
+                            }
+                        }
+                        // Clean up cache file
+                        File(ret.second).delete()
+                        toastSuccess(R.string.toast_success)
+                    } else {
+                        toastError(R.string.toast_failure)
+                    }
+                } catch (e: Exception) {
+                    Log.e(AppConfig.TAG, "Failed to backup configuration", e)
+                    toastError(R.string.toast_failure)
+                }
+            }
+        }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+
+        title = getString(R.string.title_configuration_backup_restore)
+
+        binding.layoutBackup.setOnClickListener {
+            AlertDialog.Builder(this)
+                .setTitle(R.string.title_configuration_backup)
+                .setItems(config_backup_options) { dialog, which ->
+                    when (which) {
+                        0 -> backupViaLocal()
+                        1 -> backupViaWebDav()
+                    }
+                }
+                .show()
+        }
+
+        binding.layoutShare.setOnClickListener {
+            val ret = backupConfigurationToCache()
+            if (ret.first) {
+                startActivity(
+                    Intent.createChooser(
+                        Intent(Intent.ACTION_SEND).setType("application/zip")
+                            .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                            .putExtra(
+                                Intent.EXTRA_STREAM,
+                                FileProvider.getUriForFile(
+                                    this, BuildConfig.APPLICATION_ID + ".cache", File(ret.second)
+                                )
+                            ), getString(R.string.title_configuration_share)
+                    )
+                )
+            } else {
+                toastError(R.string.toast_failure)
+            }
+        }
+
+        binding.layoutRestore.setOnClickListener {
+            AlertDialog.Builder(this)
+                .setTitle(R.string.title_configuration_restore)
+                .setItems(config_backup_options) { dialog, which ->
+                    when (which) {
+                        0 -> restoreViaLocal()
+                        1 -> restoreViaWebDav()
+                    }
+                }
+                .show()
+        }
+
+        binding.layoutWebdavConfigSetting.setOnClickListener {
+            showWebDavSettingsDialog()
+        }
+    }
+
+    /**
+     * Backup configuration to cache directory
+     * Returns Pair<success, zipFilePath>
+     */
+    private fun backupConfigurationToCache(): Pair<Boolean, String> {
+        val dateFormatted = SimpleDateFormat(
+            "yyyy-MM-dd-HH-mm-ss",
+            Locale.getDefault()
+        ).format(System.currentTimeMillis())
+        val folderName = "${getString(R.string.app_name)}_${dateFormatted}"
+        val backupDir = this.cacheDir.absolutePath + "/$folderName"
+        val outputZipFilePath = "${this.cacheDir.absolutePath}/$folderName.zip"
+
+        val count = MMKV.backupAllToDirectory(backupDir)
+        if (count <= 0) {
+            return Pair(false, "")
+        }
+
+        if (ZipUtil.zipFromFolder(backupDir, outputZipFilePath)) {
+            return Pair(true, outputZipFilePath)
+        } else {
+            return Pair(false, "")
+        }
+    }
+
+    private fun restoreConfiguration(zipFile: File): Boolean {
+        val backupDir = this.cacheDir.absolutePath + "/${System.currentTimeMillis()}"
+
+        if (!ZipUtil.unzipToFolder(zipFile, backupDir)) {
+            return false
+        }
+
+        val count = MMKV.restoreAllFromDirectory(backupDir)
+        return count > 0
+    }
+
+    private fun showFileChooser() {
+        val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
+            type = "*/*"
+            addCategory(Intent.CATEGORY_OPENABLE)
+        }
+
+        try {
+            chooseFile.launch(Intent.createChooser(intent, getString(R.string.title_file_chooser)))
+        } catch (ex: ActivityNotFoundException) {
+            Log.e(AppConfig.TAG, "File chooser activity not found", ex)
+            toast(R.string.toast_require_file_manager)
+        }
+    }
+
+    private val chooseFile =
+        registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+            val uri = result.data?.data
+            if (result.resultCode == RESULT_OK && uri != null) {
+                try {
+                    val targetFile =
+                        File(this.cacheDir.absolutePath, "${System.currentTimeMillis()}.zip")
+                    contentResolver.openInputStream(uri).use { input ->
+                        targetFile.outputStream().use { fileOut ->
+                            input?.copyTo(fileOut)
+                        }
+                    }
+                    if (restoreConfiguration(targetFile)) {
+                        toastSuccess(R.string.toast_success)
+                    } else {
+                        toastError(R.string.toast_failure)
+                    }
+                } catch (e: Exception) {
+                    Log.e(AppConfig.TAG, "Error during file restore", e)
+                    toastError(R.string.toast_failure)
+                }
+            }
+        }
+
+    private fun backupViaLocal() {
+        val dateFormatted = SimpleDateFormat(
+            "yyyy-MM-dd-HH-mm-ss",
+            Locale.getDefault()
+        ).format(System.currentTimeMillis())
+        val defaultFileName = "${getString(R.string.app_name)}_${dateFormatted}.zip"
+        createBackupFile.launch(defaultFileName)
+    }
+
+    private fun restoreViaLocal() {
+        val permission =
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                Manifest.permission.READ_MEDIA_IMAGES
+            } else {
+                Manifest.permission.READ_EXTERNAL_STORAGE
+            }
+        if (ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED) {
+            try {
+                showFileChooser()
+            } catch (e: Exception) {
+                Log.e(AppConfig.TAG, "Failed to show file chooser", e)
+            }
+        } else {
+            requestPermissionLauncher.launch(permission)
+        }
+    }
+
+    private fun backupViaWebDav() {
+        val saved = MmkvManager.decodeWebDavConfig()
+        if (saved == null || saved.baseUrl.isEmpty()) {
+            toastError(R.string.title_webdav_config_setting_unknown)
+            return
+        }
+
+        binding.pbWaiting.show()
+
+        lifecycleScope.launch(Dispatchers.IO) {
+            var tempFile: File? = null
+            try {
+                val ret = backupConfigurationToCache()
+                if (!ret.first) {
+                    withContext(Dispatchers.Main) {
+                        toastError(R.string.toast_failure)
+                    }
+                    return@launch
+                }
+
+                tempFile = File(ret.second)
+                WebDavManager.init(saved)
+
+                val ok = try {
+                    WebDavManager.uploadFile(tempFile, BACKUP_FILE_NAME)
+                } catch (e: Exception) {
+                    Log.e(AppConfig.TAG, "WebDAV upload error", e)
+                    false
+                }
+
+                withContext(Dispatchers.Main) {
+                    if (ok) toastSuccess(R.string.toast_success) else toastError(R.string.toast_failure)
+                }
+            } catch (e: Exception) {
+                Log.e(AppConfig.TAG, "WebDAV backup error", e)
+                withContext(Dispatchers.Main) {
+                    toastError(R.string.toast_failure)
+                }
+            } finally {
+                try {
+                    tempFile?.delete()
+                } catch (_: Exception) {
+                }
+                withContext(Dispatchers.Main) {
+                    binding.pbWaiting.hide()
+                }
+            }
+        }
+    }
+
+    private fun restoreViaWebDav() {
+        val saved = MmkvManager.decodeWebDavConfig()
+        if (saved == null || saved.baseUrl.isEmpty()) {
+            toastError(R.string.title_webdav_config_setting_unknown)
+            return
+        }
+
+        binding.pbWaiting.show()
+
+        lifecycleScope.launch(Dispatchers.IO) {
+            var target: File? = null
+            try {
+                target = File(cacheDir, "download_${System.currentTimeMillis()}.zip")
+                WebDavManager.init(saved)
+                val ok = WebDavManager.downloadFile(BACKUP_FILE_NAME, target)
+                if (!ok) {
+                    withContext(Dispatchers.Main) {
+                        toastError(R.string.toast_failure)
+                    }
+                    return@launch
+                }
+
+                val restored = restoreConfiguration(target)
+                withContext(Dispatchers.Main) {
+                    if (restored) {
+                        setResult(RESULT_OK, Intent().putExtra("config_restored", true))
+                        toastSuccess(R.string.toast_success)
+                    } else {
+                        toastError(R.string.toast_failure)
+                    }
+                }
+            } catch (e: Exception) {
+                Log.e(AppConfig.TAG, "WebDAV download error", e)
+                withContext(Dispatchers.Main) { toastError(R.string.toast_failure) }
+            } finally {
+                try {
+                    target?.delete()
+                } catch (_: Exception) {
+                }
+                withContext(Dispatchers.Main) {
+                    binding.pbWaiting.hide()
+                }
+            }
+        }
+    }
+
+    private fun showWebDavSettingsDialog() {
+        val dialogBinding = DialogWebdavBinding.inflate(layoutInflater)
+
+        MmkvManager.decodeWebDavConfig()?.let { cfg ->
+            dialogBinding.etWebdavUrl.setText(cfg.baseUrl)
+            dialogBinding.etWebdavUser.setText(cfg.username ?: "")
+            dialogBinding.etWebdavPass.setText(cfg.password ?: "")
+            dialogBinding.etWebdavRemotePath.setText(cfg.remoteBasePath ?: "/")
+        }
+
+        AlertDialog.Builder(this)
+            .setTitle(R.string.title_webdav_config_setting)
+            .setView(dialogBinding.root)
+            .setPositiveButton(R.string.menu_item_save_config) { _, _ ->
+                val url = dialogBinding.etWebdavUrl.text.toString().trim()
+                val user = dialogBinding.etWebdavUser.text.toString().trim().ifEmpty { null }
+                val pass = dialogBinding.etWebdavPass.text.toString()
+                val remotePath = dialogBinding.etWebdavRemotePath.text.toString().trim().ifEmpty { "/" }
+                val cfg = WebDavConfig(baseUrl = url, username = user, password = pass, remoteBasePath = remotePath)
+                MmkvManager.encodeWebDavConfig(cfg)
+                toastSuccess(R.string.toast_success)
+            }
+            .setNegativeButton(android.R.string.cancel, null)
+            .show()
+    }
+}

V2rayNG/app/src/main/java/com/v2ray/ang/ui/MainActivity.kt

@@ -56,7 +56,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
             startV2Ray()
         }
     }
-    private val requestSubSettingActivity = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
+    private val requestActivityLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
         initGroupTab()
     }
     private val tabGroupListener = object : TabLayout.OnTabSelectedListener {
@@ -672,9 +672,9 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
     override fun onNavigationItemSelected(item: MenuItem): Boolean {
         // Handle navigation view item clicks here.
         when (item.itemId) {
-            R.id.sub_setting -> requestSubSettingActivity.launch(Intent(this, SubSettingActivity::class.java))
+            R.id.sub_setting -> requestActivityLauncher.launch(Intent(this, SubSettingActivity::class.java))
             R.id.per_app_proxy_settings -> startActivity(Intent(this, PerAppProxyActivity::class.java))
-            R.id.routing_setting -> requestSubSettingActivity.launch(Intent(this, RoutingSettingActivity::class.java))
+            R.id.routing_setting -> requestActivityLauncher.launch(Intent(this, RoutingSettingActivity::class.java))
             R.id.user_asset_setting -> startActivity(Intent(this, UserAssetActivity::class.java))
             R.id.settings -> startActivity(
                 Intent(this, SettingsActivity::class.java)
@@ -684,6 +684,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
             R.id.promotion -> Utils.openUri(this, "${Utils.decode(AppConfig.APP_PROMOTION_URL)}?t=${System.currentTimeMillis()}")
             R.id.logcat -> startActivity(Intent(this, LogcatActivity::class.java))
             R.id.check_for_update -> startActivity(Intent(this, CheckUpdateActivity::class.java))
+            R.id.backup_restore -> requestActivityLauncher.launch(Intent(this, BackupActivity::class.java))
             R.id.about -> startActivity(Intent(this, AboutActivity::class.java))
         }
 

V2rayNG/app/src/main/res/layout/activity_about.xml

@@ -9,99 +9,11 @@
         android:layout_height="wrap_content"
         android:orientation="vertical">
 
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:gravity="top"
-            android:orientation="vertical">
-
-            <LinearLayout
-                android:id="@+id/layout_backup"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="?attr/selectableItemBackground"
-                android:clickable="true"
-                android:focusable="true"
-                android:gravity="center|start"
-                android:orientation="horizontal"
-                android:padding="@dimen/padding_spacing_dp16">
-
-                <ImageView
-                    android:layout_width="@dimen/image_size_dp24"
-                    android:layout_height="@dimen/image_size_dp24"
-                    app:srcCompat="@drawable/ic_backup_24dp" />
-
-                <LinearLayout
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:orientation="vertical"
-                    android:paddingStart="@dimen/padding_spacing_dp16">
-
-                    <TextView
-                        android:layout_width="wrap_content"
-                        android:layout_height="wrap_content"
-                        android:text="@string/title_configuration_backup"
-                        android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
-
-                </LinearLayout>
-
-            </LinearLayout>
-
-            <LinearLayout
-                android:id="@+id/layout_share"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="?attr/selectableItemBackground"
-                android:clickable="true"
-                android:focusable="true"
-                android:gravity="center|start"
-                android:orientation="horizontal"
-                android:padding="@dimen/padding_spacing_dp16">
-
-                <ImageView
-                    android:layout_width="@dimen/image_size_dp24"
-                    android:layout_height="@dimen/image_size_dp24"
-                    app:srcCompat="@drawable/ic_share_24dp" />
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:paddingStart="@dimen/padding_spacing_dp16"
-                    android:text="@string/title_configuration_share"
-                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
-            </LinearLayout>
-
-            <LinearLayout
-                android:id="@+id/layout_restore"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="?attr/selectableItemBackground"
-                android:clickable="true"
-                android:focusable="true"
-                android:gravity="center|start"
-                android:orientation="horizontal"
-                android:padding="@dimen/padding_spacing_dp16">
-
-                <ImageView
-                    android:layout_width="@dimen/image_size_dp24"
-                    android:layout_height="@dimen/image_size_dp24"
-                    app:srcCompat="@drawable/ic_restore_24dp" />
-
-                <TextView
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:paddingStart="@dimen/padding_spacing_dp16"
-                    android:text="@string/title_configuration_restore"
-                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
-            </LinearLayout>
-        </LinearLayout>
-
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:gravity="top"
-            android:orientation="vertical"
-            android:paddingTop="@dimen/padding_spacing_dp16">
+            android:orientation="vertical">
 
             <LinearLayout
                 android:id="@+id/layout_soure_ccode"

V2rayNG/app/src/main/res/layout/activity_backup.xml

@@ -0,0 +1,150 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true">
+
+    <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <com.google.android.material.progressindicator.LinearProgressIndicator
+            android:id="@+id/pb_waiting"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"
+            android:visibility="invisible"
+            app:indicatorColor="@color/color_fab_active" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="top"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:id="@+id/layout_backup"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?attr/selectableItemBackground"
+                android:clickable="true"
+                android:focusable="true"
+                android:gravity="center|start"
+                android:orientation="horizontal"
+                android:padding="@dimen/padding_spacing_dp16">
+
+                <ImageView
+                    android:layout_width="@dimen/image_size_dp24"
+                    android:layout_height="@dimen/image_size_dp24"
+                    app:srcCompat="@drawable/ic_backup_24dp" />
+
+                <LinearLayout
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical"
+                    android:paddingStart="@dimen/padding_spacing_dp16">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/title_configuration_backup"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:id="@+id/layout_share"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?attr/selectableItemBackground"
+                android:clickable="true"
+                android:focusable="true"
+                android:gravity="center|start"
+                android:orientation="horizontal"
+                android:padding="@dimen/padding_spacing_dp16">
+
+                <ImageView
+                    android:layout_width="@dimen/image_size_dp24"
+                    android:layout_height="@dimen/image_size_dp24"
+                    app:srcCompat="@drawable/ic_share_24dp" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:paddingStart="@dimen/padding_spacing_dp16"
+                    android:text="@string/title_configuration_share"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:id="@+id/layout_restore"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?attr/selectableItemBackground"
+                android:clickable="true"
+                android:focusable="true"
+                android:gravity="center|start"
+                android:orientation="horizontal"
+                android:padding="@dimen/padding_spacing_dp16">
+
+                <ImageView
+                    android:layout_width="@dimen/image_size_dp24"
+                    android:layout_height="@dimen/image_size_dp24"
+                    app:srcCompat="@drawable/ic_restore_24dp" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:paddingStart="@dimen/padding_spacing_dp16"
+                    android:text="@string/title_configuration_restore"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="top"
+            android:orientation="vertical"
+            android:paddingTop="@dimen/padding_spacing_dp16">
+
+            <LinearLayout
+                android:id="@+id/layout_webdav_config_setting"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="?attr/selectableItemBackground"
+                android:clickable="true"
+                android:focusable="true"
+                android:gravity="center|start"
+                android:orientation="horizontal"
+                android:padding="@dimen/padding_spacing_dp16">
+
+                <ImageView
+                    android:layout_width="@dimen/image_size_dp24"
+                    android:layout_height="@dimen/image_size_dp24"
+                    app:srcCompat="@drawable/ic_settings_24dp" />
+
+                <LinearLayout
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical"
+                    android:paddingStart="@dimen/padding_spacing_dp16">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/title_webdav_config_setting"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+
+                </LinearLayout>
+
+            </LinearLayout>
+        </LinearLayout>
+
+    </LinearLayout>
+
+</ScrollView>
+

V2rayNG/app/src/main/res/layout/dialog_webdav.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="@dimen/padding_spacing_dp16">
+
+        <EditText
+            android:id="@+id/et_webdav_url"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/title_webdav_url"
+            android:inputType="textUri"
+            android:layout_marginTop="@dimen/padding_spacing_dp8" />
+
+        <EditText
+            android:id="@+id/et_webdav_user"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/title_webdav_user"
+            android:layout_marginTop="@dimen/padding_spacing_dp8" />
+
+        <EditText
+            android:id="@+id/et_webdav_pass"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/title_webdav_pass"
+            android:inputType="textPassword"
+            android:layout_marginTop="@dimen/padding_spacing_dp8" />
+
+        <EditText
+            android:id="@+id/et_webdav_remote_path"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/title_webdav_remote_path"
+            android:layout_marginTop="@dimen/padding_spacing_dp8" />
+
+    </LinearLayout>
+
+</ScrollView>

V2rayNG/app/src/main/res/menu/menu_drawer.xml

@@ -39,6 +39,10 @@
             android:id="@+id/check_for_update"
             android:icon="@drawable/ic_check_update_24dp"
             android:title="@string/update_check_for_update" />
+        <item
+            android:id="@+id/backup_restore"
+            android:icon="@drawable/ic_restore_24dp"
+            android:title="@string/title_configuration_backup_restore" />
         <item
             android:id="@+id/about"
             android:icon="@drawable/ic_about_24dp"

V2rayNG/app/src/main/res/values-ar/strings.xml

@@ -238,9 +238,6 @@
     <string name="title_source_code">الكود المصدري</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">قناة Telegram</string>
-    <string name="title_configuration_backup">نسخ التكوين احتياطيًا</string>
-    <string name="title_configuration_restore">استعادة التكوين</string>
-    <string name="title_configuration_share">مشاركة التكوين</string>
 
     <string name="title_pref_promotion">ترويج</string>
 
@@ -339,6 +336,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">نسخ التكوين احتياطيًا</string>
+    <string name="title_configuration_restore">استعادة التكوين</string>
+    <string name="title_configuration_share">مشاركة التكوين</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>رمز استجابة سريعة (QRcode)</item>
         <item>تصدير إلى الحافظة</item>
@@ -384,6 +393,10 @@
         <item>Least Ping</item>
         <item>Least Load</item>
     </string-array>
-    <string name="pre_resolving_domain">Pre-resolving domain…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-bn/strings.xml

@@ -238,9 +238,6 @@
     <string name="title_source_code">সোর্স কোড</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">টেলিগ্রাম চ্যানেল</string>
-    <string name="title_configuration_backup">কনফিগারেশন ব্যাকআপ</string>
-    <string name="title_configuration_restore">কনফিগারেশন পুনরুদ্ধার</string>
-    <string name="title_configuration_share">কনফিগারেশন শেয়ার করুন</string>
 
     <string name="title_pref_promotion">প্রচার</string>
 
@@ -338,6 +335,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">কনফিগারেশন ব্যাকআপ</string>
+    <string name="title_configuration_restore">কনফিগারেশন পুনরুদ্ধার</string>
+    <string name="title_configuration_share">কনফিগারেশন শেয়ার করুন</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>QR কোড</item>
         <item>ক্লিপবোর্ডে রপ্তানি করুন</item>
@@ -389,6 +398,10 @@
         <item>Least Ping</item>
         <item>Least Load</item>
     </string-array>
-    <string name="pre_resolving_domain">Pre-resolving domain…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-bqi-rIR/strings.xml

@@ -238,9 +238,6 @@
     <string name="title_source_code">کود بونچک</string>
     <string name="title_oss_license">موجوزا کود بونچک</string>
     <string name="title_tg_channel">تورگه تلگرام</string>
-    <string name="title_configuration_backup">لادراری گرؽڌن ز کانفیگ</string>
-    <string name="title_configuration_restore">وورگندن کانفیگ</string>
-    <string name="title_configuration_share">یک رسۊوی کانفیگ</string>
 
     <string name="title_pref_promotion">تبلیقات</string>
 
@@ -347,6 +344,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">لادراری گرؽڌن ز کانفیگ</string>
+    <string name="title_configuration_restore">وورگندن کانفیگ</string>
+    <string name="title_configuration_share">یک رسۊوی کانفیگ</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>QRcode</item>
         <item>و در کشیڌن من کلیپ بورد</item>
@@ -399,6 +408,10 @@
         <item>کم ترین پینگ</item>
         <item>کم ترین بار(لود)</item>
     </string-array>
-    <string name="pre_resolving_domain">پؽش هل دامنه…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-fa/strings.xml

@@ -237,9 +237,6 @@
     <string name="title_source_code">کد منبع</string>
     <string name="title_oss_license">مجوز های منبع باز</string>
     <string name="title_tg_channel">کانال تلگرام</string>
-    <string name="title_configuration_backup">پشتیبان گیری از پیکربندی</string>
-    <string name="title_configuration_restore">بازیابی پیکربندی</string>
-    <string name="title_configuration_share">اشتراک گذاری پیکربندی</string>
     <string name="title_pref_promotion">تبلیغات</string>
 
     <string name="title_pref_auto_update_subscription">به‌ روزرسانی خودکار اشتراک ها</string>
@@ -344,6 +341,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">پشتیبان گیری از پیکربندی</string>
+    <string name="title_configuration_restore">بازیابی پیکربندی</string>
+    <string name="title_configuration_share">اشتراک گذاری پیکربندی</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>QRcode</item>
         <item>خروجی گرفتن در کلیپ‌ بورد</item>
@@ -398,6 +407,10 @@
         <item>کمترین پینگ</item>
         <item>کمترین بار(لود)</item>
     </string-array>
-    <string name="pre_resolving_domain">Pre-resolving domain…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-ru/strings.xml

@@ -237,9 +237,6 @@
     <string name="title_source_code">Исходный код</string>
     <string name="title_oss_license">Лицензии открытого исходного кода</string>
     <string name="title_tg_channel">Telegram-канал</string>
-    <string name="title_configuration_backup">Резервирование конфигурации</string>
-    <string name="title_configuration_restore">Восстановление конфигурации</string>
-    <string name="title_configuration_share">Поделиться конфигурацией</string>
 
     <string name="title_pref_promotion">Содействие</string>
 
@@ -346,6 +343,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">Резервирование конфигурации</string>
+    <string name="title_configuration_restore">Восстановление конфигурации</string>
+    <string name="title_configuration_share">Поделиться конфигурацией</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>QR-код</item>
         <item>Экспорт в буфер обмена</item>
@@ -398,6 +407,10 @@
         <item>Наименьшая задержка</item>
         <item>Наименьшая нагрузка</item>
     </string-array>
-    <string name="pre_resolving_domain">Предварительное определение домена…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-vi/strings.xml

@@ -239,9 +239,6 @@
     <string name="title_source_code">Mã nguồn</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">Kênh Telegram</string>
-    <string name="title_configuration_backup">Sao lưu cấu hình</string>
-    <string name="title_configuration_restore">Khôi phục cấu hình</string>
-    <string name="title_configuration_share">Chia sẻ cấu hình</string>
     <string name="title_pref_promotion">Quảng bá server</string>
 
     <string name="title_pref_auto_update_subscription">Tự động cập nhật các gói đăng ký</string>
@@ -340,6 +337,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">Sao lưu cấu hình</string>
+    <string name="title_configuration_restore">Khôi phục cấu hình</string>
+    <string name="title_configuration_share">Chia sẻ cấu hình</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>Xuất ra mã QR (Chụp màn hình để lưu)</item>
         <item>Sao chép vào Clipboard</item>
@@ -386,6 +395,10 @@
         <item>Least Ping</item>
         <item>Least Load</item>
     </string-array>
-    <string name="pre_resolving_domain">Pre-resolving domain…</string>
+
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-zh-rCN/strings.xml

@@ -235,9 +235,6 @@
     <string name="title_source_code">源代码</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">Telegram 频道</string>
-    <string name="title_configuration_backup">备份配置</string>
-    <string name="title_configuration_restore">还原配置</string>
-    <string name="title_configuration_share">分享配置</string>
 
     <string name="title_pref_promotion">推广</string>
 
@@ -338,6 +335,18 @@
     <string name="title_policy_group_subscription_id">来自订阅分组</string>
     <string name="title_policy_group_subscription_filter">别名正则过滤</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">备份 &amp; 还原</string>
+    <string name="title_configuration_backup">备份配置</string>
+    <string name="title_configuration_restore">还原配置</string>
+    <string name="title_configuration_share">分享配置</string>
+    <string name="title_webdav_config_setting">WebDAV 设置</string>
+    <string name="title_webdav_config_setting_unknown">请先设置 WebDAV</string>
+    <string name="title_webdav_url">WebDAV 服务器地址</string>WebDAV server address
+    <string name="title_webdav_user">用户名</string>
+    <string name="title_webdav_pass">密码</string>
+    <string name="title_webdav_remote_path">远程文件夹名（可选）</string>
+
     <string-array name="share_method">
         <item>二维码</item>
         <item>导出至剪贴板</item>
@@ -390,6 +399,10 @@
         <item>最低延迟</item>
         <item>最稳定</item>
     </string-array>
-    <string name="pre_resolving_domain">预解析域名中…</string>
+
+    <string-array name="config_backup_options">
+        <item>本地</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values-zh-rTW/strings.xml

@@ -236,9 +236,6 @@
     <string name="title_source_code">原始碼</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">Telegram 頻道</string>
-    <string name="title_configuration_backup">備份設定</string>
-    <string name="title_configuration_restore">還原設定</string>
-    <string name="title_configuration_share">分享設定</string>
 
     <string name="title_pref_promotion">推廣</string>
 
@@ -338,6 +335,18 @@
     <string name="title_policy_group_subscription_id">來自訂閱分組</string>
     <string name="title_policy_group_subscription_filter">別名正規過濾</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">備份設定</string>
+    <string name="title_configuration_restore">還原設定</string>
+    <string name="title_configuration_share">分享設定</string>
+    <string name="title_webdav_config_setting">WebDAV 設定</string>
+    <string name="title_webdav_config_setting_unknown">請先設定 WebDAV</string>
+    <string name="title_webdav_url">WebDAV 伺服器位址</string>
+    <string name="title_webdav_user">使用者名稱</string>
+    <string name="title_webdav_pass">密碼</string>
+    <string name="title_webdav_remote_path">遠端目錄（可選）</string>
+
     <string-array name="share_method">
         <item>二維碼</item>
         <item>匯出至剪貼簿</item>
@@ -390,6 +399,10 @@
         <item>最低延遲</item>
         <item>最少卡頓</item>
     </string-array>
-    <string name="pre_resolving_domain">預解析域名…</string>
+
+    <string-array name="config_backup_options">
+        <item>本地</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/app/src/main/res/values/strings.xml

@@ -241,9 +241,6 @@
     <string name="title_source_code">Source code</string>
     <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">Telegram channel</string>
-    <string name="title_configuration_backup">Backup config</string>
-    <string name="title_configuration_restore">Restore config</string>
-    <string name="title_configuration_share">Share config</string>
 
     <string name="title_pref_promotion">Promotion</string>
 
@@ -350,6 +347,18 @@
     <string name="title_policy_group_subscription_id">From subscription group</string>
     <string name="title_policy_group_subscription_filter">Remarks regular filter</string>
 
+    <!-- BackupActivity -->
+    <string name="title_configuration_backup_restore">Backup &amp; Restore</string>
+    <string name="title_configuration_backup">Backup config</string>
+    <string name="title_configuration_restore">Restore config</string>
+    <string name="title_configuration_share">Share config</string>
+    <string name="title_webdav_config_setting">WebDAV Settings</string>
+    <string name="title_webdav_config_setting_unknown">Please configure WebDAV first.</string>
+    <string name="title_webdav_url">WebDAV server URL</string>
+    <string name="title_webdav_user">Username</string>
+    <string name="title_webdav_pass">Password</string>
+    <string name="title_webdav_remote_path">Remote directory (optional)</string>
+
     <string-array name="share_method">
         <item>QRcode</item>
         <item>Export to clipboard</item>
@@ -404,6 +413,9 @@
         <item>Least Load</item>
     </string-array>
 
-    <string name="pre_resolving_domain">Pre-resolving domain…</string>
+    <string-array name="config_backup_options">
+        <item>Local</item>
+        <item>WebDAV</item>
+    </string-array>
 
 </resources>

V2rayNG/gradle/libs.versions.toml

@@ -13,6 +13,7 @@ activity = "1.12.2"
 constraintlayout = "2.2.1"
 mmkvStatic = "1.3.16"
 gson = "2.13.2"
+okhttp = "5.3.2"
 quickieFoss = "1.14.0"
 kotlinxCoroutinesAndroid = "1.10.2"
 kotlinxCoroutinesCore = "1.10.2"
@@ -41,6 +42,7 @@ androidx-activity = { group = "androidx.activity", name = "activity", version.re
 androidx-constraintlayout = { group = "androidx.constraintlayout", name = "constraintlayout", version.ref = "constraintlayout" }
 mmkv-static = { module = "com.tencent:mmkv-static", version.ref = "mmkvStatic" }
 gson = { module = "com.google.code.gson:gson", version.ref = "gson" }
+okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
 quickie-foss = { module = "com.github.T8RIN.QuickieExtended:quickie-foss", version.ref = "quickieFoss" }
 kotlinx-coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "kotlinxCoroutinesAndroid" }
 kotlinx-coroutines-core = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-core", version.ref = "kotlinxCoroutinesCore" }