feat: 新增安卓平台支持

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+
+    <application
+        android:allowBackup="false"
+        android:icon="@drawable/ic_launcher_one_kvm"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme">
+        <service
+            android:name=".OneKvmService"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice" />
+        <receiver
+            android:name=".BootReceiver"
+            android:enabled="true"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

android/app/src/main/java/cn/one_kvm/androidhost/BootReceiver.kt

@@ -0,0 +1,13 @@
+package cn.one_kvm.androidhost
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+
+class BootReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action == Intent.ACTION_BOOT_COMPLETED && HostSettings.getAutoStart(context)) {
+            OneKvmService.start(context)
+        }
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/HostSettings.kt

@@ -0,0 +1,33 @@
+package cn.one_kvm.androidhost
+
+import android.content.Context
+
+object HostSettings {
+    private const val PREFS = "one_kvm_android"
+    private const val KEY_AUTO_START = "auto_start"
+    private const val KEY_CLEAR_EXISTING_OTG = "clear_existing_otg"
+
+    fun getAutoStart(context: Context): Boolean {
+        return context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .getBoolean(KEY_AUTO_START, false)
+    }
+
+    fun setAutoStart(context: Context, enabled: Boolean) {
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putBoolean(KEY_AUTO_START, enabled)
+            .apply()
+    }
+
+    fun getClearExistingOtg(context: Context): Boolean {
+        return context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .getBoolean(KEY_CLEAR_EXISTING_OTG, false)
+    }
+
+    fun setClearExistingOtg(context: Context, enabled: Boolean) {
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putBoolean(KEY_CLEAR_EXISTING_OTG, enabled)
+            .apply()
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/LogConfig.kt

@@ -0,0 +1,30 @@
+package cn.one_kvm.androidhost
+
+import android.content.Context
+
+object LogConfig {
+    private const val PREFS = "one_kvm_android"
+    private const val KEY_LOG_LEVEL = "log_level"
+    const val DEFAULT_LEVEL = "info"
+    val LEVELS = arrayOf("error", "warn", "info", "debug", "trace")
+
+    fun getLevel(context: Context): String {
+        val value = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .getString(KEY_LOG_LEVEL, DEFAULT_LEVEL)
+            ?: DEFAULT_LEVEL
+        return if (LEVELS.contains(value)) value else DEFAULT_LEVEL
+    }
+
+    fun setLevel(context: Context, level: String) {
+        val safeLevel = if (LEVELS.contains(level)) level else DEFAULT_LEVEL
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putString(KEY_LOG_LEVEL, safeLevel)
+            .apply()
+    }
+
+    fun rustLogFilter(level: String): String {
+        val safeLevel = if (LEVELS.contains(level)) level else DEFAULT_LEVEL
+        return "one_kvm=$safeLevel,hwcodec=$safeLevel,tower_http=$safeLevel,webrtc_sctp=warn"
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/LogStore.kt

@@ -0,0 +1,71 @@
+package cn.one_kvm.androidhost
+
+import android.content.Context
+import java.io.File
+import java.util.concurrent.Executors
+import java.util.concurrent.TimeUnit
+
+object LogStore {
+    private const val FLUSH_DELAY_MS = 250L
+    private const val MAX_BUFFER_CHARS = 64 * 1024
+
+    private val lock = Any()
+    private val buffer = StringBuilder()
+    private val executor = Executors.newSingleThreadScheduledExecutor { runnable ->
+        Thread(runnable, "OneKvmLogStore").apply { isDaemon = true }
+    }
+
+    private var logFile: File? = null
+    private var flushScheduled = false
+
+    fun defaultLogFile(context: Context): File {
+        return File(File(context.getExternalFilesDir(null), "runtime"), "one-kvm.log")
+    }
+
+    fun configure(file: File) {
+        synchronized(lock) {
+            flushLocked()
+            file.parentFile?.mkdirs()
+            file.writeText("")
+            buffer.clear()
+            logFile = file
+            flushScheduled = false
+        }
+    }
+
+    fun append(line: String) {
+        synchronized(lock) {
+            if (logFile == null) return
+
+            buffer.append(line).append('\n')
+            if (buffer.length >= MAX_BUFFER_CHARS) {
+                flushLocked()
+                return
+            }
+
+            if (!flushScheduled) {
+                flushScheduled = true
+                executor.schedule({ flush() }, FLUSH_DELAY_MS, TimeUnit.MILLISECONDS)
+            }
+        }
+    }
+
+    fun flush() {
+        synchronized(lock) {
+            flushLocked()
+        }
+    }
+
+    private fun flushLocked() {
+        val file = logFile ?: return
+        if (buffer.isEmpty()) {
+            flushScheduled = false
+            return
+        }
+
+        val text = buffer.toString()
+        buffer.clear()
+        flushScheduled = false
+        file.appendText(text)
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/MainActivity.kt

@@ -0,0 +1,452 @@
+package cn.one_kvm.androidhost
+
+import android.app.Activity
+import android.graphics.Color
+import android.graphics.Typeface
+import android.graphics.drawable.GradientDrawable
+import android.os.Build
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.view.Gravity
+import android.view.View
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.Button
+import android.widget.CompoundButton
+import android.widget.LinearLayout
+import android.widget.ScrollView
+import android.widget.Spinner
+import android.widget.Switch
+import android.widget.TextView
+import java.net.Inet4Address
+import java.net.InetSocketAddress
+import java.net.NetworkInterface
+import java.net.Socket
+import java.util.Collections
+
+class MainActivity : Activity() {
+    private lateinit var statusValue: TextView
+    private lateinit var hostActionButton: Button
+    private lateinit var logLevelSpinner: Spinner
+    private lateinit var autoStartSwitch: Switch
+    private lateinit var clearOtgSwitch: Switch
+    private val statusHandler = Handler(Looper.getMainLooper())
+    private var statusPollsRemaining = 0
+    private val statusPoller = object : Runnable {
+        override fun run() {
+            refreshStatus()
+            statusPollsRemaining -= 1
+            if (statusPollsRemaining > 0) {
+                statusHandler.postDelayed(this, STATUS_POLL_INTERVAL_MS)
+            }
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        window.statusBarColor = color("#F8FAFC")
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            window.navigationBarColor = color("#F8FAFC")
+        }
+
+        val content = LinearLayout(this).apply {
+            orientation = LinearLayout.VERTICAL
+            setPadding(20.dp(), 24.dp(), 20.dp(), 28.dp())
+            background = solid("#F8FAFC")
+        }
+
+        content.addView(startCard())
+        content.addView(settingsCard())
+        content.addView(infoCard())
+
+        setContentView(ScrollView(this).apply {
+            isFillViewport = true
+            setBackgroundColor(color("#F8FAFC"))
+            addView(content)
+        })
+    }
+
+    override fun onResume() {
+        super.onResume()
+        reconcilePersistedStatus()
+        refreshStatus()
+        autoStartSwitch.isChecked = HostSettings.getAutoStart(this)
+        clearOtgSwitch.isChecked = HostSettings.getClearExistingOtg(this)
+    }
+
+    override fun onPause() {
+        statusHandler.removeCallbacks(statusPoller)
+        super.onPause()
+    }
+
+    private fun startCard(): View {
+        return card {
+            addView(sectionTitle("启动管理"))
+            addView(TextView(this@MainActivity).apply {
+                text = "管理本机 One-KVM 服务进程。暂停会停止前台服务并释放运行资源。"
+                textSize = 14f
+                setTextColor(color("#64748B"))
+                setPadding(0, 6.dp(), 0, 14.dp())
+            })
+
+            statusValue = TextView(this@MainActivity).apply {
+                textSize = 14f
+                typeface = Typeface.DEFAULT_BOLD
+                setTextColor(color("#0F172A"))
+                background = rounded("#EFF6FF", "#BFDBFE", 8)
+                setPadding(12.dp(), 8.dp(), 12.dp(), 8.dp())
+            }
+            addView(statusValue, matchWrap())
+
+            addView(LinearLayout(this@MainActivity).apply {
+                orientation = LinearLayout.HORIZONTAL
+                gravity = Gravity.CENTER_VERTICAL
+                setPadding(0, 14.dp(), 0, 0)
+                hostActionButton = actionButton("启动", primary = true) { toggleHost() }
+                addView(hostActionButton, matchButton())
+            })
+            refreshStatus()
+        }
+    }
+
+    private fun settingsCard(): View {
+        return card {
+            addView(sectionTitle("运行设置"))
+
+            val (autoStartRow, autoStartControl) = settingSwitchRow(
+                title = "开机自启动",
+                subtitle = "系统启动完成后自动拉起 One-KVM 前台服务。",
+                checked = HostSettings.getAutoStart(this@MainActivity),
+            ) { _, checked ->
+                HostSettings.setAutoStart(this@MainActivity, checked)
+                LogStore.append("Boot auto-start ${if (checked) "enabled" else "disabled"}")
+            }
+            autoStartSwitch = autoStartControl
+            addView(autoStartRow)
+
+            addView(divider())
+
+            val (clearOtgRow, clearOtgControl) = settingSwitchRow(
+                title = "清除已有 OTG Gadget",
+                subtitle = "启动 root host 前尝试解绑并删除 configfs 中已有的 USB gadget。",
+                checked = HostSettings.getClearExistingOtg(this@MainActivity),
+            ) { _, checked ->
+                HostSettings.setClearExistingOtg(this@MainActivity, checked)
+                LogStore.append("Clear existing OTG gadget ${if (checked) "enabled" else "disabled"}")
+            }
+            clearOtgSwitch = clearOtgControl
+            addView(clearOtgRow)
+
+            addView(divider())
+            addView(logLevelRow())
+        }
+    }
+
+    private fun infoCard(): View {
+        return card {
+            addView(sectionTitle("应用信息"))
+            addView(infoRow("软件内核版本", kernelVersion()))
+            addView(infoRow("访问地址", accessAddresses(), selectable = true))
+            addView(infoRow("日志文件", LogStore.defaultLogFile(this@MainActivity).absolutePath, selectable = true))
+        }
+    }
+
+    private fun settingSwitchRow(
+        title: String,
+        subtitle: String,
+        checked: Boolean,
+        listener: CompoundButton.OnCheckedChangeListener,
+    ): Pair<View, Switch> {
+        val switch = Switch(this).apply {
+            isChecked = checked
+            setOnCheckedChangeListener(listener)
+        }
+
+        val row = LinearLayout(this).apply {
+            orientation = LinearLayout.HORIZONTAL
+            gravity = Gravity.CENTER_VERTICAL
+            setPadding(0, 12.dp(), 0, 12.dp())
+            addView(LinearLayout(this@MainActivity).apply {
+                orientation = LinearLayout.VERTICAL
+                addView(TextView(this@MainActivity).apply {
+                    text = title
+                    textSize = 15f
+                    typeface = Typeface.DEFAULT_BOLD
+                    setTextColor(color("#0F172A"))
+                })
+                addView(TextView(this@MainActivity).apply {
+                    text = subtitle
+                    textSize = 13f
+                    setTextColor(color("#64748B"))
+                    setPadding(0, 4.dp(), 12.dp(), 0)
+                })
+            }, LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f))
+            addView(switch)
+        }
+
+        return row to switch
+    }
+
+    private fun infoRow(label: String, value: String, selectable: Boolean = false): View {
+        return LinearLayout(this).apply {
+            orientation = LinearLayout.VERTICAL
+            setPadding(0, 12.dp(), 0, 12.dp())
+            addView(TextView(this@MainActivity).apply {
+                text = label
+                textSize = 13f
+                setTextColor(color("#64748B"))
+            })
+            addView(TextView(this@MainActivity).apply {
+                text = value
+                textSize = 15f
+                setTextColor(color("#0F172A"))
+                setPadding(0, 4.dp(), 0, 0)
+                setTextIsSelectable(selectable)
+            })
+            addView(divider())
+        }
+    }
+
+    private fun logLevelRow(): View {
+        return LinearLayout(this).apply {
+            orientation = LinearLayout.HORIZONTAL
+            gravity = Gravity.CENTER_VERTICAL
+            setPadding(0, 12.dp(), 0, 0)
+            addView(TextView(this@MainActivity).apply {
+                text = "日志级别"
+                textSize = 15f
+                typeface = Typeface.DEFAULT_BOLD
+                setTextColor(color("#0F172A"))
+            }, LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f))
+
+            logLevelSpinner = Spinner(this@MainActivity).apply {
+                adapter = ArrayAdapter(
+                    this@MainActivity,
+                    android.R.layout.simple_spinner_dropdown_item,
+                    LogConfig.LEVELS,
+                )
+                setSelection(LogConfig.LEVELS.indexOf(LogConfig.getLevel(this@MainActivity)).coerceAtLeast(0))
+                onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
+                    override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
+                        val level = LogConfig.LEVELS[position]
+                        if (level != LogConfig.getLevel(this@MainActivity)) {
+                            LogConfig.setLevel(this@MainActivity, level)
+                            LogStore.append("Log level set to $level; restart service to apply")
+                        }
+                    }
+
+                    override fun onNothingSelected(parent: AdapterView<*>?) = Unit
+                }
+            }
+            addView(logLevelSpinner)
+        }
+    }
+
+    private fun card(build: LinearLayout.() -> Unit): View {
+        return LinearLayout(this).apply {
+            orientation = LinearLayout.VERTICAL
+            setPadding(16.dp(), 16.dp(), 16.dp(), 16.dp())
+            background = rounded("#FFFFFF", "#E2E8F0", 10)
+            elevation = 1.5f.dpFloat()
+            build()
+        }.also {
+            it.layoutParams = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT,
+            ).apply { setMargins(0, 0, 0, 14.dp()) }
+        }
+    }
+
+    private fun sectionTitle(text: String): View {
+        return TextView(this).apply {
+            this.text = text
+            textSize = 17f
+            typeface = Typeface.DEFAULT_BOLD
+            setTextColor(color("#0F172A"))
+        }
+    }
+
+    private fun actionButton(text: String, primary: Boolean, action: () -> Unit): Button {
+        return Button(this).apply {
+            this.text = text
+            textSize = 15f
+            isAllCaps = false
+            minHeight = 44.dp()
+            setTextColor(color(if (primary) "#FFFFFF" else "#0F172A"))
+            background = if (primary) rounded("#2563EB", "#2563EB", 8) else rounded("#FFFFFF", "#CBD5E1", 8)
+            setOnClickListener { action() }
+        }
+    }
+
+    private fun toggleHost() {
+        when (ServiceStatusStore.snapshot(this).state) {
+            ServiceStatusStore.STATE_RUNNING -> pauseHost()
+            ServiceStatusStore.STATE_STOPPED, ServiceStatusStore.STATE_ERROR -> startHost()
+        }
+    }
+
+    private fun startHost() {
+        ServiceStatusStore.setStarting(this)
+        refreshStatus()
+        OneKvmService.start(this)
+        LogStore.append("Start requested from app UI")
+        pollStatusForAWhile()
+    }
+
+    private fun pauseHost() {
+        ServiceStatusStore.setStopping(this)
+        refreshStatus()
+        OneKvmService.stop(this)
+        LogStore.append("Pause requested from app UI")
+        pollStatusForAWhile()
+    }
+
+    private fun refreshStatus() {
+        if (::statusValue.isInitialized) {
+            statusValue.text = "状态：${hostStatusSummary()}"
+        }
+        updateHostActionButton()
+    }
+
+    private fun hostStatusSummary(): String {
+        val serviceStatus = ServiceStatusStore.snapshot(this)
+        if (serviceStatus.state != ServiceStatusStore.STATE_STOPPED) {
+            return serviceStatus.labelText()
+        }
+
+        val nativeRunning = runCatching {
+            NativeBridge.hostStatus().contains("running", ignoreCase = true)
+        }.getOrDefault(false)
+
+        return if (nativeRunning) "运行中" else "已停止"
+    }
+
+    private fun reconcilePersistedStatus() {
+        val serviceStatus = ServiceStatusStore.snapshot(this)
+        if (serviceStatus.state == ServiceStatusStore.STATE_STOPPED) return
+        if (
+            serviceStatus.state == ServiceStatusStore.STATE_STARTING &&
+            System.currentTimeMillis() - serviceStatus.updatedAt < STARTING_RECONCILE_GRACE_MS
+        ) {
+            return
+        }
+
+        Thread {
+            val portOpen = isLocalWebPortOpen()
+            val nativeRunning = runCatching { NativeBridge.hostStatus().contains("running", ignoreCase = true) }
+                .getOrDefault(false)
+            if (!portOpen && !nativeRunning) {
+                ServiceStatusStore.setStopped(this, "服务未运行")
+                runOnUiThread { refreshStatus() }
+            }
+        }.start()
+    }
+
+    private fun isLocalWebPortOpen(): Boolean {
+        return runCatching {
+            Socket().use { socket ->
+                socket.connect(InetSocketAddress("127.0.0.1", 8080), 250)
+            }
+            true
+        }.getOrDefault(false)
+    }
+
+    private fun updateHostActionButton() {
+        if (!::hostActionButton.isInitialized) return
+
+        when (ServiceStatusStore.snapshot(this).state) {
+            ServiceStatusStore.STATE_STARTING -> setHostActionButton("启动中...", enabled = false, primary = true)
+            ServiceStatusStore.STATE_RUNNING -> setHostActionButton("停止", enabled = true, primary = false)
+            ServiceStatusStore.STATE_STOPPING -> setHostActionButton("停止中...", enabled = false, primary = false)
+            else -> setHostActionButton("启动", enabled = true, primary = true)
+        }
+    }
+
+    private fun setHostActionButton(text: String, enabled: Boolean, primary: Boolean) {
+        hostActionButton.text = text
+        hostActionButton.isEnabled = enabled
+        hostActionButton.alpha = if (enabled) 1f else 0.65f
+        hostActionButton.setTextColor(color(if (primary) "#FFFFFF" else "#0F172A"))
+        hostActionButton.background = if (primary) {
+            rounded("#2563EB", "#2563EB", 8)
+        } else {
+            rounded("#FFFFFF", "#CBD5E1", 8)
+        }
+    }
+
+    private fun pollStatusForAWhile() {
+        statusPollsRemaining = 20
+        statusHandler.removeCallbacks(statusPoller)
+        statusHandler.postDelayed(statusPoller, STATUS_POLL_INTERVAL_MS)
+    }
+
+    private fun kernelVersion(): String {
+        return runCatching { NativeBridge.kernelVersion() }
+            .getOrElse { "unknown" }
+    }
+
+    private fun accessAddresses(): String {
+        val addresses = runCatching {
+            Collections.list(NetworkInterface.getNetworkInterfaces())
+                .filter { it.isUp && !it.isLoopback }
+                .flatMap { iface -> Collections.list(iface.inetAddresses) }
+                .filterIsInstance<Inet4Address>()
+                .filter { !it.isLoopbackAddress }
+                .map { "http://${it.hostAddress}:8080" }
+                .distinct()
+        }.getOrDefault(emptyList())
+
+        return (addresses.ifEmpty { listOf("http://127.0.0.1:8080") }).joinToString("\n")
+    }
+
+    private fun divider(): View {
+        return View(this).apply {
+            setBackgroundColor(color("#E2E8F0"))
+            layoutParams = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                1,
+            ).apply { setMargins(0, 0, 0, 0) }
+        }
+    }
+
+    private fun matchWrap(): LinearLayout.LayoutParams {
+        return LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT,
+        )
+    }
+
+    private fun matchButton(): LinearLayout.LayoutParams {
+        return LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            48.dp(),
+        )
+    }
+
+    private fun solid(hex: String): GradientDrawable = GradientDrawable().apply {
+        setColor(color(hex))
+    }
+
+    private fun rounded(fill: String, stroke: String, radiusDp: Int): GradientDrawable {
+        return GradientDrawable().apply {
+            setColor(color(fill))
+            cornerRadius = radiusDp.dpFloat()
+            setStroke(1.dp(), color(stroke))
+        }
+    }
+
+    private fun color(hex: String): Int = Color.parseColor(hex)
+
+    private fun Int.dp(): Int = (this * resources.displayMetrics.density + 0.5f).toInt()
+
+    private fun Int.dpFloat(): Float = this * resources.displayMetrics.density
+
+    private fun Float.dpFloat(): Float = this * resources.displayMetrics.density
+
+    companion object {
+        private const val STATUS_POLL_INTERVAL_MS = 500L
+        private const val STARTING_RECONCILE_GRACE_MS = 15_000L
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/NativeBridge.kt

@@ -0,0 +1,21 @@
+package cn.one_kvm.androidhost
+
+import android.content.Context
+
+object NativeBridge {
+    init {
+        System.loadLibrary("one_kvm_android_bootstrap")
+    }
+
+    external fun initTlsVerifier(context: Context): Int
+
+    external fun setEnv(name: String, value: String): Int
+
+    external fun startHost(dataDir: String, bindAddress: String, port: Int): String
+
+    external fun stopHost(): String
+
+    external fun hostStatus(): String
+
+    external fun kernelVersion(): String
+}

android/app/src/main/java/cn/one_kvm/androidhost/OneKvmService.kt

@@ -0,0 +1,413 @@
+package cn.one_kvm.androidhost
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.os.IBinder
+import java.io.BufferedReader
+import java.io.File
+import java.io.InputStreamReader
+import java.io.InterruptedIOException
+import java.util.concurrent.Executors
+
+class OneKvmService : Service() {
+    private var rootProcess: Process? = null
+    private val commandExecutor = Executors.newSingleThreadExecutor { runnable ->
+        Thread(runnable, "OneKvmServiceCommand")
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+        ensureNotificationChannel()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        when (intent?.action ?: ACTION_START) {
+            ACTION_STOP -> {
+                ServiceStatusStore.setStopping(this)
+                commandExecutor.execute {
+                    stopHostRuntime()
+                    stopSelfResult(startId)
+                }
+                return START_NOT_STICKY
+            }
+            ACTION_START -> {
+                ServiceStatusStore.setStarting(this)
+                startForegroundCompat(NOTIFICATION_ID, notification("启动中"))
+                commandExecutor.execute {
+                    val currentState = ServiceStatusStore.snapshot(this).state
+                    if (currentState == ServiceStatusStore.STATE_RUNNING && isPortOpen(8080, 100)) {
+                        return@execute
+                    }
+                    val dataDir = File(getExternalFilesDir(null), "runtime")
+                    if (!dataDir.exists()) dataDir.mkdirs()
+                    val result = startRustHost(dataDir)
+                    if (result.startsWith("Running") && !result.contains("start failed", ignoreCase = true)) {
+                        ServiceStatusStore.setRunning(this, "服务已启动")
+                        notificationManager().notify(NOTIFICATION_ID, notification("运行中"))
+                    } else {
+                        ServiceStatusStore.setError(this, "启动失败")
+                        notificationManager().notify(NOTIFICATION_ID, notification("启动失败"))
+                    }
+                }
+            }
+        }
+        return START_STICKY
+    }
+
+    override fun onDestroy() {
+        stopHostRuntime(updateNotification = false)
+        commandExecutor.shutdownNow()
+        ServiceStatusStore.setStopped(this)
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    private fun notification(state: String): Notification {
+        val intent = Intent(this, MainActivity::class.java)
+        val pendingIntent = createContentIntent(intent)
+        val builder = createNotificationBuilder()
+        return builder
+            .setSmallIcon(R.drawable.ic_stat_one_kvm)
+            .setContentTitle("One-KVM Android Host")
+            .setContentText(state)
+            .setContentIntent(pendingIntent)
+            .setOngoing(true)
+            .build()
+    }
+
+    private fun ensureNotificationChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return
+        val channel = NotificationChannel(
+            CHANNEL_ID,
+            "One-KVM Host",
+            NotificationManager.IMPORTANCE_LOW,
+        )
+        notificationManager().createNotificationChannel(channel)
+    }
+
+    @Suppress("DEPRECATION")
+    private fun createNotificationBuilder(): Notification.Builder {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            Notification.Builder(this, CHANNEL_ID)
+        } else {
+            Notification.Builder(this)
+        }
+    }
+
+    private fun createContentIntent(intent: Intent): PendingIntent {
+        val flags = pendingIntentFlags()
+        return PendingIntent.getActivity(this, 0, intent, flags)
+    }
+
+    private fun pendingIntentFlags(): Int {
+        var flags = PendingIntent.FLAG_UPDATE_CURRENT
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            flags = flags or pendingIntentImmutableFlag()
+        }
+        return flags
+    }
+
+    private fun pendingIntentImmutableFlag(): Int {
+        return try {
+            PendingIntent::class.java.getField("FLAG_IMMUTABLE").getInt(null)
+        } catch (_: ReflectiveOperationException) {
+            0
+        }
+    }
+
+    private fun notificationManager(): NotificationManager {
+        return getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+    }
+
+    private fun stopHostRuntime(updateNotification: Boolean = true) {
+        stopRootHost()
+        NativeBridge.stopHost()
+        waitForPortRelease(8080, 2_000)
+        LogStore.flush()
+        ServiceStatusStore.setStopped(this)
+        if (updateNotification) {
+            notificationManager().notify(NOTIFICATION_ID, notification("已停止"))
+        }
+    }
+
+    private fun startRustHost(dataDir: File): String {
+        val logLevel = LogConfig.getLevel(this)
+        val rustLog = LogConfig.rustLogFilter(logLevel)
+        val appLogFile = LogStore.defaultLogFile(this)
+        LogStore.configure(appLogFile)
+        val rustLogFile = appLogFile
+        LogStore.append("Starting One-KVM Rust host, data_dir=${dataDir.absolutePath}, log_level=$logLevel")
+        val executable = extractHostBinary()
+        return runCatching {
+            val tlsInit = NativeBridge.initTlsVerifier(this)
+            if (tlsInit != 0) {
+                throw IllegalStateException("rustls platform verifier init failed with code $tlsInit")
+            }
+            stopRootHost(executable)
+            clearExistingOtgGadgetsIfEnabled()
+            startRootHost(executable, dataDir, rustLog, rustLogFile, logLevel)
+            LogStore.append("Rust host running as root on port 8080")
+            "Running as root on port 8080"
+        }.getOrElse { rootError ->
+            LogStore.append("Root host unavailable: ${rootError.message ?: rootError::class.java.simpleName}")
+            configureAlsaEnvironment(executable)
+            NativeBridge.setEnv("RUST_LOG", rustLog)
+            NativeBridge.setEnv("ONE_KVM_FFMPEG_LOG", ffmpegLogLevel(logLevel))
+            NativeBridge.setEnv("ONE_KVM_ANDROID_LOG_FILE", rustLogFile.absolutePath)
+            val jniResult = NativeBridge.startHost(dataDir.absolutePath, "0.0.0.0", 8080)
+            LogStore.append("Rust host running in app process on port 8080: $jniResult")
+            "Running in app process on port 8080 (${rootError.message ?: "root unavailable"}; $jniResult)"
+        }
+    }
+
+    private fun clearExistingOtgGadgetsIfEnabled() {
+        if (!HostSettings.getClearExistingOtg(this)) return
+
+        val command = """
+            root=/sys/kernel/config/usb_gadget
+            [ -d "${'$'}root" ] || exit 0
+            for gadget in "${'$'}root"/*; do
+              [ -d "${'$'}gadget" ] || continue
+              [ -w "${'$'}gadget/UDC" ] && echo "" > "${'$'}gadget/UDC" 2>/dev/null || true
+              find "${'$'}gadget/configs" -type l -delete 2>/dev/null || true
+              rm -rf "${'$'}gadget" 2>/dev/null || true
+            done
+        """.trimIndent()
+
+        runCatching {
+            ProcessBuilder("/system/xbin/su", "0", "sh", "-c", command)
+                .redirectErrorStream(true)
+                .start()
+                .waitFor()
+        }.onSuccess { exit ->
+            LogStore.append("Existing OTG gadget cleanup finished with exit code $exit")
+        }.onFailure { err ->
+            LogStore.append("Existing OTG gadget cleanup failed: ${err.message ?: err::class.java.simpleName}")
+        }
+    }
+
+    private fun configureAlsaEnvironment(executable: File) {
+        val binDir = executable.parentFile
+            ?: throw IllegalStateException("host binary has no parent directory")
+        val alsaConfigDir = File(binDir, "alsa")
+        val alsaConfigPath = File(alsaConfigDir, "alsa.conf")
+        NativeBridge.setEnv("ALSA_CONFIG_DIR", alsaConfigDir.absolutePath)
+        NativeBridge.setEnv("ALSA_CONFIG_PATH", alsaConfigPath.absolutePath)
+    }
+
+    private fun extractHostBinary(): File {
+        val abi = Build.SUPPORTED_ABIS.firstOrNull { it == "arm64-v8a" || it == "armeabi-v7a" }
+            ?: throw IllegalStateException("unsupported ABI: ${Build.SUPPORTED_ABIS.joinToString()}")
+        val binDir = File(filesDir, "bin/$abi")
+        val target = File(binDir, "one-kvm-android-host")
+        copyAssetIfChanged("bin/$abi/one-kvm-android-host", target)
+        copyAssetIfChanged("bin/$abi/libc++_shared.so", File(binDir, "libc++_shared.so"))
+        copyAssetIfChanged("bin/$abi/libasound.so", File(binDir, "libasound.so"))
+        copyAssetIfChanged("bin/$abi/libopus.so", File(binDir, "libopus.so"))
+        copyAssetDirectoryIfChanged("bin/$abi/alsa", File(binDir, "alsa"))
+        if (!target.setExecutable(true, false)) {
+            throw IllegalStateException("cannot mark host binary executable")
+        }
+        return target
+    }
+
+    private fun copyAssetIfChanged(assetPath: String, target: File) {
+        val stamp = File(target.parentFile, "${target.name}.stamp")
+        @Suppress("DEPRECATION")
+        val packageInfo = packageManager.getPackageInfo(packageName, 0)
+        val expectedStamp = "${packageInfo.lastUpdateTime}:$assetPath"
+        if (target.exists() && stamp.exists() && stamp.readText() == expectedStamp) return
+        target.parentFile?.mkdirs()
+        assets.open(assetPath).use { input ->
+            target.outputStream().use { output -> input.copyTo(output) }
+        }
+        stamp.writeText(expectedStamp)
+    }
+
+    private fun copyAssetDirectoryIfChanged(assetDir: String, targetDir: File) {
+        @Suppress("DEPRECATION")
+        val packageInfo = packageManager.getPackageInfo(packageName, 0)
+        val stamp = File(targetDir, ".stamp")
+        val expectedStamp = "${packageInfo.lastUpdateTime}:$assetDir"
+        if (targetDir.exists() && stamp.exists() && stamp.readText() == expectedStamp) return
+        if (targetDir.exists()) targetDir.deleteRecursively()
+        copyAssetDirectory(assetDir, targetDir)
+        stamp.writeText(expectedStamp)
+    }
+
+    private fun copyAssetDirectory(assetDir: String, targetDir: File) {
+        targetDir.mkdirs()
+        val children = assets.list(assetDir)?.filter { it.isNotEmpty() }.orEmpty()
+        for (child in children) {
+            val childAsset = "$assetDir/$child"
+            val childTarget = File(targetDir, child)
+            val grandChildren = assets.list(childAsset)?.filter { it.isNotEmpty() }.orEmpty()
+            if (grandChildren.isEmpty()) {
+                copyAssetIfChanged(childAsset, childTarget)
+            } else {
+                copyAssetDirectory(childAsset, childTarget)
+            }
+        }
+    }
+
+    private fun startRootHost(
+        executable: File,
+        dataDir: File,
+        rustLog: String,
+        rustLogFile: File,
+        logLevel: String,
+    ) {
+        stopRootHost(executable)
+        waitForPortRelease(8080, 2_000)
+        val libDir = executable.parentFile?.absolutePath
+            ?: throw IllegalStateException("host binary has no parent directory")
+        val alsaConfigDir = File(executable.parentFile, "alsa")
+        val alsaConfigPath = File(alsaConfigDir, "alsa.conf")
+        val command =
+            "export LD_LIBRARY_PATH=${shellQuote(libDir)}:\${LD_LIBRARY_PATH:-}; " +
+                "export ALSA_CONFIG_DIR=${shellQuote(alsaConfigDir.absolutePath)}; " +
+                "export ALSA_CONFIG_PATH=${shellQuote(alsaConfigPath.absolutePath)}; " +
+                "export RUST_LOG=${shellQuote(rustLog)}; " +
+                "export ONE_KVM_FFMPEG_LOG=${shellQuote(ffmpegLogLevel(logLevel))}; " +
+                "export ONE_KVM_ANDROID_LOG_FILE=${shellQuote(rustLogFile.absolutePath)}; " +
+                "${shellQuote(executable.absolutePath)} ${shellQuote(dataDir.absolutePath)} 0.0.0.0 8080"
+        val process = ProcessBuilder("/system/xbin/su", "0", "sh", "-c", command)
+            .redirectErrorStream(true)
+            .start()
+        rootProcess = process
+
+        Thread {
+            val readError = runCatching {
+                BufferedReader(InputStreamReader(process.inputStream)).useLines { lines ->
+                    lines.forEach {
+                        android.util.Log.i("OneKvmService", it)
+                    }
+                }
+            }.exceptionOrNull()
+            if (readError != null && readError !is InterruptedIOException) {
+                android.util.Log.w("OneKvmService", "Root host log reader stopped", readError)
+                LogStore.append("Root host log reader stopped: ${readError.message ?: readError::class.java.simpleName}")
+            }
+            val exit = runCatching { process.waitFor() }.getOrNull()
+            if (rootProcess === process && exit != null) {
+                rootProcess = null
+                ServiceStatusStore.setError(this, "Root host exited with code $exit")
+            }
+        }.start()
+
+        Thread.sleep(500)
+        val exit = runCatching { process.exitValue() }.getOrNull()
+        if (exit != null) {
+            rootProcess = null
+            throw IllegalStateException("root host exited immediately: $exit")
+        }
+    }
+
+    private fun startForegroundCompat(id: Int, notification: Notification) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            val invoked = runCatching {
+                val method = Service::class.java.getMethod(
+                    "startForeground",
+                    Int::class.javaPrimitiveType,
+                    Notification::class.java,
+                    Int::class.javaPrimitiveType,
+                )
+                method.invoke(this, id, notification, foregroundServiceTypeConnectedDevice())
+            }.isSuccess
+            if (invoked) return
+        }
+        super.startForeground(id, notification)
+    }
+
+    private fun foregroundServiceTypeConnectedDevice(): Int {
+        return try {
+            Service::class.java.getField("FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE").getInt(null)
+        } catch (_: ReflectiveOperationException) {
+            0
+        }
+    }
+
+    private fun stopRootHost(executable: File? = null) {
+        rootProcess?.destroy()
+        rootProcess = null
+        stopRootHostProcess(executable)
+    }
+
+    private fun stopRootHostProcess(executable: File? = null) {
+        val command = buildString {
+            append("pkill -TERM -f '[o]ne-kvm-android-host' 2>/dev/null || true; ")
+            append("for pid in $(pidof one-kvm-android-host 2>/dev/null); do kill -TERM \"${'$'}pid\" 2>/dev/null || true; done; ")
+            append("sleep 0.2; ")
+            append("pkill -KILL -f '[o]ne-kvm-android-host' 2>/dev/null || true; ")
+            append("for pid in $(pidof one-kvm-android-host 2>/dev/null); do kill -KILL \"${'$'}pid\" 2>/dev/null || true; done; ")
+        }
+
+        runCatching {
+            ProcessBuilder("/system/xbin/su", "0", "sh", "-c", command)
+                .redirectErrorStream(true)
+                .start()
+                .waitFor()
+        }.onFailure { err ->
+            LogStore.append("Failed to stop stale root host: ${err.message ?: err::class.java.simpleName}")
+        }
+    }
+
+    private fun waitForPortRelease(port: Int, timeoutMs: Long) {
+        val deadline = System.currentTimeMillis() + timeoutMs
+        while (System.currentTimeMillis() < deadline) {
+            val inUse = isPortOpen(port, 100)
+            if (!inUse) return
+            Thread.sleep(100)
+        }
+    }
+
+    private fun isPortOpen(port: Int, timeoutMs: Int): Boolean {
+        return runCatching {
+            java.net.Socket().use { socket ->
+                socket.connect(java.net.InetSocketAddress("127.0.0.1", port), timeoutMs)
+            }
+            true
+        }.getOrDefault(false)
+    }
+
+    private fun shellQuote(value: String): String {
+        return "'" + value.replace("'", "'\\''") + "'"
+    }
+
+    private fun ffmpegLogLevel(level: String): String {
+        return when (level) {
+            "trace" -> "trace"
+            "debug" -> "debug"
+            "info" -> "info"
+            "warn" -> "warning"
+            else -> "error"
+        }
+    }
+
+    companion object {
+        private const val CHANNEL_ID = "one_kvm_host"
+        private const val NOTIFICATION_ID = 1001
+        const val ACTION_START = "cn.one_kvm.androidhost.START"
+        const val ACTION_STOP = "cn.one_kvm.androidhost.STOP"
+
+        fun start(context: Context) {
+            val intent = Intent(context, OneKvmService::class.java).setAction(ACTION_START)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                context.startForegroundService(intent)
+            } else {
+                context.startService(intent)
+            }
+        }
+
+        fun stop(context: Context) {
+            context.startService(Intent(context, OneKvmService::class.java).setAction(ACTION_STOP))
+        }
+    }
+}

android/app/src/main/java/cn/one_kvm/androidhost/ServiceStatusStore.kt

@@ -0,0 +1,75 @@
+package cn.one_kvm.androidhost
+
+import android.content.Context
+
+object ServiceStatusStore {
+    private const val PREFS = "one_kvm_android_status"
+    private const val KEY_STATE = "state"
+    private const val KEY_MESSAGE = "message"
+    private const val KEY_UPDATED_AT = "updated_at"
+
+    const val STATE_STOPPED = "stopped"
+    const val STATE_STARTING = "starting"
+    const val STATE_RUNNING = "running"
+    const val STATE_STOPPING = "stopping"
+    const val STATE_ERROR = "error"
+
+    data class Snapshot(
+        val state: String,
+        val message: String,
+        val updatedAt: Long,
+    ) {
+        fun labelText(): String {
+            return when (state) {
+                STATE_STARTING -> "启动中"
+                STATE_RUNNING -> "运行中"
+                STATE_STOPPING -> "停止中"
+                STATE_ERROR -> "错误"
+                else -> "已停止"
+            }
+        }
+
+        fun displayText(): String {
+            val label = labelText()
+            return if (message.isBlank()) label else "$label：$message"
+        }
+    }
+
+    fun setStarting(context: Context, message: String = "正在启动服务") {
+        write(context, STATE_STARTING, message)
+    }
+
+    fun setRunning(context: Context, message: String) {
+        write(context, STATE_RUNNING, message)
+    }
+
+    fun setStopping(context: Context, message: String = "正在停止服务") {
+        write(context, STATE_STOPPING, message)
+    }
+
+    fun setStopped(context: Context, message: String = "服务已停止") {
+        write(context, STATE_STOPPED, message)
+    }
+
+    fun setError(context: Context, message: String) {
+        write(context, STATE_ERROR, message)
+    }
+
+    fun snapshot(context: Context): Snapshot {
+        val prefs = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+        return Snapshot(
+            state = prefs.getString(KEY_STATE, STATE_STOPPED) ?: STATE_STOPPED,
+            message = prefs.getString(KEY_MESSAGE, "") ?: "",
+            updatedAt = prefs.getLong(KEY_UPDATED_AT, 0L),
+        )
+    }
+
+    private fun write(context: Context, state: String, message: String) {
+        context.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putString(KEY_STATE, state)
+            .putString(KEY_MESSAGE, message)
+            .putLong(KEY_UPDATED_AT, System.currentTimeMillis())
+            .apply()
+    }
+}

android/app/src/main/res/drawable/ic_launcher_one_kvm.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#1D7BF2"
+        android:pathData="M24,0h60a24,24 0,0 1,24 24v60a24,24 0,0 1,-24 24H24a24,24 0,0 1,-24 -24V24a24,24 0,0 1,24 -24z" />
+    <path
+        android:fillColor="#AED8E8"
+        android:pathData="M29,25h50a3,3 0,0 1,3 3v31a3,3 0,0 1,-3 3H29a3,3 0,0 1,-3 -3V28a3,3 0,0 1,3 -3z" />
+    <path
+        android:fillColor="#3F3F3D"
+        android:pathData="M31,30h46v27H31z" />
+    <path
+        android:fillColor="#E7F1F4"
+        android:pathData="M31,26h10a1.4,1.4 0,0 1,0 2.8H31a1.4,1.4 0,0 1,0 -2.8z" />
+    <path
+        android:fillColor="#8BBFD1"
+        android:pathData="M49,62h10l1.5,8h-13z" />
+    <path
+        android:fillColor="#9FCFE0"
+        android:pathData="M40,70a14,4.5 0,1 0,28 0a14,4.5 0,1 0,-28 0z" />
+    <path
+        android:fillColor="#E8F5F8"
+        android:pathData="M45,70a7,1.8 0,1 0,14 0a7,1.8 0,1 0,-14 0z" />
+    <path
+        android:fillColor="#BFE6F1"
+        android:pathData="M32,76h38l5,8H27z" />
+    <path
+        android:fillColor="#76ADC2"
+        android:pathData="M28,84h47v2H28z" />
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillAlpha="0.82"
+        android:pathData="M37,79h6v2h-6zM46,79h5v2h-5zM54,79h5v2h-5zM62,79h6v2h-6zM34,82h7v2h-7zM44,82h6v2h-6zM53,82h11v2H53zM67,82h4v2h-4z" />
+</vector>

android/app/src/main/res/drawable/ic_stat_one_kvm.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M4,5h16v10H4z" />
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M9,17h6v2h3v2H6v-2h3z" />
+</vector>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">One-KVM Android Host</string>
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="AppTheme" parent="android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:fontFamily">sans</item>
+        <item name="android:colorAccent">#2563EB</item>
+    </style>
+</resources>