Add Android USB serial bridge docs

- Remove drop-shadow filters on SVG paths on mobile (SignalChart, SummaryCurve)
- Hide scan-haze overlay (mix-blend-mode: screen) on mobile
- Remove feTurbulence noise filter on mobile (biggest perf win)
- Simplify backgrounds and box-shadows on mobile
- Remove blur transition on inactive panels
- Hide window control buttons (minimize/maximize/close) on mobile
- Configure Android release build to sign with debug keystore
- Update README with changelog and Android build instructions

README.md

@@ -1,10 +1,11 @@
-# Tauri Demo (SvelteKit + TypeScript)
+# JE-Skin (SvelteKit + Tauri)
 
 ## 环境要求
 
 - Node.js 18+（建议 LTS）
 - Rust stable（`rustup` + `cargo`）
 - Windows 下请确保已安装 WebView2 Runtime 和 MSVC C++ 构建工具
+- Android 构建需要 Android SDK + NDK
 
 ## 安装依赖
 
@@ -42,12 +43,61 @@ npm run build
 npm run tauri build
 ```
 
+构建 Android APK / AAB：
+
+```sh
+npx tauri android build
+```
+
+产物路径：
+- APK: `src-tauri/gen/android/app/build/outputs/apk/universal/release/app-universal-release.apk`
+- AAB: `src-tauri/gen/android/app/build/outputs/bundle/universalRelease/app-universal-release.aab`
+
+Release APK 默认使用 debug keystore 签名（`src-tauri/gen/android/app/je-skin-debug.keystore`），可直接 `adb install` 到设备。
+
 ## 代码检查
 
 ```sh
 npm run check
 ```
 
+## v0.5.0 修改记录
+
+### Android USB 串口接入
+
+- **Tauri 插件注册**：Android 端通过 Rust builder 注册 `usb-serial` 插件，移除 `MainActivity` 中的手动加载逻辑
+- **USB 设备枚举**：使用 `usb-serial-for-android` 的 `UsbSerialProber` 识别串口设备，并返回设备名、厂商 ID、产品 ID、权限状态等信息
+- **USB 权限申请**：完善 Android USB 授权回调，支持按设备名、vendorId/productId 解析设备并处理授权后的打开流程
+- **串口数据桥接**：Kotlin 端打开 USB serial port 后通过 Unix socketpair 将 fd 交给 Rust，Rust 端继续复用 `serial_connect_fd` 数据采集链路
+- **资源释放**：关闭连接时同步释放桥接 fd、USB serial port 和 `UsbDeviceConnection`，避免重复打开后的资源残留
+
+### Tauri 权限与构建
+
+- 新增 `src-tauri/permissions/usb-serial/default.toml`，声明 Android USB serial 插件命令和前端所需本地命令权限
+- `default.json` 增加 USB serial 与本地命令权限，兼容 snake_case / camelCase 插件命令名
+- Android Gradle 仓库加入 JitPack，用于解析 USB serial 驱动依赖
+- ProGuard 增加 Tauri 插件注解、`UsbSerialPlugin` 和 `com.hoho.android.usbserial` 保留规则，避免 release 包混淆后插件命令失效
+- Android 构建下 `serial_enum` 返回空列表，并仅保留 fd 连接入口，避免桌面串口枚举依赖进入 Android 编译路径
+
+## v0.4.0 修改记录
+
+### 移动端性能优化
+
+- **SignalChart / SummaryCurve**：在 `@media (max-width: 900px)` 下移除 SVG 路径上的 `filter: drop-shadow()`，避免移动端 GPU 软件回流导致卡顿
+- **SignalChart**：隐藏 `.scan-haze`（`mix-blend-mode: screen` 合成开销大），简化面板 `background` / `box-shadow`
+- **SummaryCurve**：移动端移除 `.summary-line` 和 `.summary-dot` 的 drop-shadow 滤镜
+- **页面级**：移动端隐藏 `.hud-noise`（`feTurbulence` SVG 滤镜是最大性能杀手），降低 `.hud-vignette` 透明度，简化 `.hud-gradient`
+- 移除 inactive 面板的 `filter: blur()` 过渡动画
+- 移除 transition 中的 `filter` 属性，添加 `will-change: d` 优化路径更新
+
+### 移动端 UI 调整
+
+- **隐藏三大金刚**：`@media (max-width: 900px)` 下隐藏标题栏右侧的最小化/最大化/关闭按钮（Android 系统自带窗口管理）
+
+### Android 打包
+
+- Release 构建配置使用 debug keystore 签名，输出签名 APK 而非 unsigned
+
 ## 推荐 IDE 插件
 
 [VS Code](https://code.visualstudio.com/) + [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode) + [Tauri](https://marketplace.visualstudio.com/items?itemName=tauri-apps.tauri-vscode) + [rust-analyzer](https://marketplace.visualstudio.com/items?itemName=rust-lang.rust-analyzer)

src-tauri/capabilities/default.json

@@ -11,6 +11,13 @@
     "core:window:allow-set-size",
     "core:window:allow-start-dragging",
     "opener:default",
-    "process:default"
+    "process:default",
+    "allow-usb-serial-list",
+    "allow-usb-serial-open",
+    "allow-usb-serial-close",
+    "allow-usb-serial-list-camel",
+    "allow-usb-serial-open-camel",
+    "allow-usb-serial-close-camel",
+    "allow-local-commands"
   ]
 }

src-tauri/gen/android/app/build.gradle.kts

@@ -43,6 +43,7 @@ android {
                     .plus(getDefaultProguardFile("proguard-android-optimize.txt"))
                     .toList().toTypedArray()
             )
+            signingConfig = signingConfigs.getByName("debug")
         }
     }
     kotlinOptions {
@@ -63,6 +64,7 @@ dependencies {
     implementation("androidx.activity:activity-ktx:1.10.1")
     implementation("com.google.android.material:material:1.12.0")
     implementation("androidx.lifecycle:lifecycle-process:2.10.0")
+    implementation("com.github.mik3y:usb-serial-for-android:3.9.0")
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.4")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.5.0")

src-tauri/gen/android/app/proguard-rules.pro

@@ -19,3 +19,16 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+-keepattributes RuntimeVisibleAnnotations,RuntimeInvisibleAnnotations,*Annotation*,Signature,InnerClasses,EnclosingMethod
+
+-keep class app.tauri.annotation.** { *; }
+-keep class app.tauri.plugin.** { *; }
+
+-keep class com.lenn.tauri_serial.MainActivity { *; }
+-keep class com.lenn.tauri_serial.UsbSerialPlugin { *; }
+-keepclassmembers class com.lenn.tauri_serial.UsbSerialPlugin {
+    public *;
+}
+
+-keep class com.hoho.android.usbserial.** { *; }

src-tauri/gen/android/app/src/main/java/com/lenn/tauri_serial/MainActivity.kt

@@ -7,7 +7,5 @@ class MainActivity : TauriActivity() {
   override fun onCreate(savedInstanceState: Bundle?) {
     enableEdgeToEdge()
     super.onCreate(savedInstanceState)
-    val plugin = UsbSerialPlugin(this)
-    pluginManager.load(null, "usb-serial", plugin, "")
   }
 }

src-tauri/gen/android/app/src/main/java/com/lenn/tauri_serial/UsbSerialPlugin.kt

@@ -10,20 +10,36 @@ import android.hardware.usb.UsbDevice
 import android.hardware.usb.UsbDeviceConnection
 import android.hardware.usb.UsbManager
 import android.os.Build
+import android.os.ParcelFileDescriptor
+import android.system.Os
+import android.system.OsConstants
 import app.tauri.annotation.Command
 import app.tauri.annotation.TauriPlugin
+import app.tauri.plugin.Invoke
 import app.tauri.plugin.JSObject
 import app.tauri.plugin.Plugin
-import app.tauri.plugin.Invoke
+import com.hoho.android.usbserial.driver.UsbSerialDriver
+import com.hoho.android.usbserial.driver.UsbSerialPort
+import com.hoho.android.usbserial.driver.UsbSerialProber
+import java.io.FileDescriptor
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.io.IOException
+import java.util.concurrent.atomic.AtomicBoolean
+import org.json.JSONArray
 
 @TauriPlugin
 class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
     companion object {
         private const val ACTION_USB_PERMISSION = "com.lenn.tauri_serial.USB_PERMISSION"
+        private const val BAUD_RATE = 921600
+        private const val READ_TIMEOUT_MS = 100
+        private const val WRITE_TIMEOUT_MS = 100
     }
 
     private var pendingConnectInvoke: Invoke? = null
-    private var pendingConnectDevice: UsbDevice? = null
+    private var pendingConnectDeviceName: String? = null
+    private var activeBridge: SerialBridge? = null
 
     private val usbPermissionReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context, intent: Intent) {
@@ -39,10 +55,10 @@ class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
 
                 val granted = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)
                 val invoke = pendingConnectInvoke
-                val targetDevice = pendingConnectDevice
+                val targetDeviceName = pendingConnectDeviceName
 
                 pendingConnectInvoke = null
-                pendingConnectDevice = null
+                pendingConnectDeviceName = null
 
                 if (invoke == null || device == null) return
 
@@ -51,8 +67,8 @@ class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
                     return
                 }
 
-                if (targetDevice != null && device.deviceName == targetDevice.deviceName) {
-                    openAndReturn(invoke, device)
+                if (targetDeviceName != null && device.deviceName == targetDeviceName) {
+                    openAndReturn(invoke, device.deviceName)
                 } else {
                     invoke.reject("USB device mismatch")
                 }
@@ -65,7 +81,9 @@ class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
         val filter = IntentFilter(ACTION_USB_PERMISSION)
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
             activity.applicationContext.registerReceiver(
-                usbPermissionReceiver, filter, Context.RECEIVER_NOT_EXPORTED
+                usbPermissionReceiver,
+                filter,
+                Context.RECEIVER_NOT_EXPORTED
             )
         } else {
             activity.applicationContext.registerReceiver(usbPermissionReceiver, filter)
@@ -74,45 +92,66 @@ class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
 
     override fun onDestroy() {
         super.onDestroy()
+        activeBridge?.close()
+        activeBridge = null
         try {
             activity.applicationContext.unregisterReceiver(usbPermissionReceiver)
-        } catch (_: Exception) {}
+        } catch (_: Exception) {
+        }
     }
 
     @Command
     fun usb_serial_list(invoke: Invoke) {
+        listDevices(invoke)
+    }
+
+    @Command
+    fun usbSerialList(invoke: Invoke) {
+        listDevices(invoke)
+    }
+
+    private fun listDevices(invoke: Invoke) {
         val usbManager = activity.getSystemService(Context.USB_SERVICE) as? UsbManager
         if (usbManager == null) {
             invoke.reject("USB service not available")
             return
         }
 
-        val devices = usbManager.deviceList
         val result = JSObject()
+        val serialDevices = JSONArray()
 
-        val serialDevices = mutableListOf<JSObject>()
-        for ((_, device) in devices) {
-            if (isUsbSerialDevice(device)) {
+        for (driver in UsbSerialProber.getDefaultProber().findAllDrivers(usbManager)) {
+            val device = driver.device
             val obj = JSObject()
             obj.put("name", device.deviceName)
             obj.put("vendorId", device.vendorId)
             obj.put("productId", device.productId)
-                obj.put("manufacturer", device.manufacturerName ?: "")
-                obj.put("product", device.productName ?: "")
-                obj.put("serial", device.serialNumber ?: "")
+            obj.put("manufacturer", safeDeviceString { device.manufacturerName })
+            obj.put("product", safeDeviceString { device.productName })
+            obj.put("serial", safeDeviceString { device.serialNumber })
             obj.put("hasPermission", usbManager.hasPermission(device))
-                serialDevices.add(obj)
-            }
+            serialDevices.put(obj)
         }
 
-        result.put("devices", serialDevices.toTypedArray())
+        result.put("devices", serialDevices)
         invoke.resolve(result)
     }
 
     @Command
     fun usb_serial_open(invoke: Invoke) {
+        openDevice(invoke)
+    }
+
+    @Command
+    fun usbSerialOpen(invoke: Invoke) {
+        openDevice(invoke)
+    }
+
+    private fun openDevice(invoke: Invoke) {
         val args = invoke.parseArgs(JSObject::class.java)
         val deviceName = args.optString("name", "")
+        val vendorId = if (args.has("vendorId")) args.optInt("vendorId") else null
+        val productId = if (args.has("productId")) args.optInt("productId") else null
 
         val usbManager = activity.getSystemService(Context.USB_SERVICE) as? UsbManager
         if (usbManager == null) {
@@ -120,98 +159,230 @@ class UsbSerialPlugin(private val activity: Activity) : Plugin(activity) {
             return
         }
 
-        val device = usbManager.deviceList[deviceName]
+        val device = resolveDevice(usbManager, deviceName, vendorId, productId)
         if (device == null) {
-            invoke.reject("USB device not found: $deviceName")
+            val available = usbManager.deviceList.values.joinToString(", ") { it.deviceName }
+            invoke.reject("USB device not found: $deviceName; available: $available")
             return
         }
 
         if (!usbManager.hasPermission(device)) {
             synchronized(this) {
                 pendingConnectInvoke = invoke
-                pendingConnectDevice = device
+                pendingConnectDeviceName = device.deviceName
             }
 
             val flags = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-                PendingIntent.FLAG_MUTABLE
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_MUTABLE
             } else {
-                0
+                PendingIntent.FLAG_UPDATE_CURRENT
             }
+            val permissionRequest = Intent(ACTION_USB_PERMISSION).setPackage(activity.packageName)
             val permissionIntent = PendingIntent.getBroadcast(
-                activity, 0, Intent(ACTION_USB_PERMISSION), flags
+                activity,
+                0,
+                permissionRequest,
+                flags
             )
             usbManager.requestPermission(device, permissionIntent)
             return
         }
 
-        openAndReturn(invoke, device)
+        openAndReturn(invoke, device.deviceName)
     }
 
     @Command
     fun usb_serial_close(invoke: Invoke) {
+        closeBridge()
         invoke.resolve(JSObject())
     }
 
-    private fun openAndReturn(invoke: Invoke, device: UsbDevice) {
+    @Command
+    fun usbSerialClose(invoke: Invoke) {
+        closeBridge()
+        invoke.resolve(JSObject())
+    }
+
+    private fun closeBridge() {
+        activeBridge?.close()
+        activeBridge = null
+    }
+
+    private fun openAndReturn(invoke: Invoke, deviceName: String) {
         val usbManager = activity.getSystemService(Context.USB_SERVICE) as? UsbManager
         if (usbManager == null) {
             invoke.reject("USB service not available")
             return
         }
 
-        val connection: UsbDeviceConnection = usbManager.openDevice(device)
-            ?: run {
+        val driver = findDriver(usbManager, deviceName)
+        if (driver == null) {
+            invoke.reject("USB serial driver not found: $deviceName")
+            return
+        }
+
+        val connection = usbManager.openDevice(driver.device)
+        if (connection == null) {
             invoke.reject("Failed to open USB device")
             return
         }
 
-        var claimedInterface = false
-        for (i in 0 until device.interfaceCount) {
-            val iface = device.getInterface(i)
-            if (iface.endpointCount >= 2) {
-                connection.claimInterface(iface, true)
-                claimedInterface = true
-                break
-            }
-        }
-
-        if (!claimedInterface) {
-            invoke.reject("No usable USB interface found")
+        val port = driver.ports.firstOrNull()
+        if (port == null) {
+            connection.close()
+            invoke.reject("No serial port found on USB device")
             return
         }
 
-        val fd = connection.fileDescriptor
-        val result = JSObject()
-        result.put("fd", fd)
-        result.put("name", device.deviceName)
-        result.put("vendorId", device.vendorId)
-        result.put("productId", device.productId)
-        invoke.resolve(result)
-    }
-
-    private fun isUsbSerialDevice(device: UsbDevice): Boolean {
-        for (i in 0 until device.interfaceCount) {
-            val iface = device.getInterface(i)
-            val classId = iface.interfaceClass
-            if (classId == 0x02 || classId == 0xFF) {
-                if (iface.endpointCount >= 2) {
-                    return true
-                }
-            }
-        }
-
-        val knownVendors = setOf(
-            0x1A86, // CH340/CH341
-            0x10C4, // CP210x
-            0x0403, // FTDI
-            0x067B, // PL2303
-            0x2341, // Arduino
-            0x239A, // Adafruit
+        try {
+            port.open(connection)
+            port.setParameters(
+                BAUD_RATE,
+                UsbSerialPort.DATABITS_8,
+                UsbSerialPort.STOPBITS_1,
+                UsbSerialPort.PARITY_NONE
             )
-        if (device.vendorId in knownVendors) {
-            return true
+
+            val rustSide = FileDescriptor()
+            val bridgeSide = FileDescriptor()
+            Os.socketpair(OsConstants.AF_UNIX, OsConstants.SOCK_STREAM, 0, rustSide, bridgeSide)
+            val rustFd = ParcelFileDescriptor.dup(rustSide).detachFd()
+            Os.close(rustSide)
+
+            activeBridge?.close()
+            activeBridge = SerialBridge(bridgeSide, port, connection).also { it.start() }
+
+            val result = JSObject()
+            result.put("fd", rustFd)
+            result.put("name", driver.device.deviceName)
+            result.put("vendorId", driver.device.vendorId)
+            result.put("productId", driver.device.productId)
+            invoke.resolve(result)
+        } catch (error: Exception) {
+            try {
+                port.close()
+            } catch (_: Exception) {
+            }
+            connection.close()
+            invoke.reject(error.message ?: "Failed to open USB serial port")
+        }
     }
 
-        return false
+    private fun findDriver(usbManager: UsbManager, deviceName: String): UsbSerialDriver? {
+        return UsbSerialProber.getDefaultProber()
+            .findAllDrivers(usbManager)
+            .firstOrNull { it.device.deviceName == deviceName || it.device.deviceName.equals(deviceName, ignoreCase = true) }
+    }
+
+    private fun resolveDevice(
+        usbManager: UsbManager,
+        deviceName: String,
+        vendorId: Int?,
+        productId: Int?
+    ): UsbDevice? {
+        usbManager.deviceList[deviceName]?.let { return it }
+
+        val devices = usbManager.deviceList.values.toList()
+        devices.firstOrNull { it.deviceName.equals(deviceName, ignoreCase = true) }?.let { return it }
+
+        if (vendorId != null && productId != null) {
+            devices.firstOrNull { it.vendorId == vendorId && it.productId == productId }?.let { return it }
+        }
+
+        val drivers = UsbSerialProber.getDefaultProber().findAllDrivers(usbManager)
+        drivers.firstOrNull {
+            it.device.deviceName == deviceName || it.device.deviceName.equals(deviceName, ignoreCase = true)
+        }?.device?.let { return it }
+
+        if (drivers.size == 1) {
+            return drivers.first().device
+        }
+
+        if (devices.size == 1) {
+            return devices.first()
+        }
+
+        return null
+    }
+
+    private fun safeDeviceString(read: () -> String?): String {
+        return try {
+            read() ?: ""
+        } catch (_: SecurityException) {
+            ""
+        }
+    }
+
+    private class SerialBridge(
+        private val bridgeFd: FileDescriptor,
+        private val port: UsbSerialPort,
+        private val connection: UsbDeviceConnection
+    ) {
+        private val running = AtomicBoolean(false)
+        private lateinit var serialToRustThread: Thread
+        private lateinit var rustToSerialThread: Thread
+
+        fun start() {
+            running.set(true)
+            serialToRustThread = Thread(::copySerialToRust, "JE-Skin-usb-serial-rx")
+            rustToSerialThread = Thread(::copyRustToSerial, "JE-Skin-usb-serial-tx")
+            serialToRustThread.start()
+            rustToSerialThread.start()
+        }
+
+        fun close() {
+            if (!running.getAndSet(false)) return
+
+            try {
+                Os.close(bridgeFd)
+            } catch (_: Exception) {
+            }
+            try {
+                port.close()
+            } catch (_: Exception) {
+            }
+            connection.close()
+        }
+
+        private fun copySerialToRust() {
+            val output = FileOutputStream(bridgeFd)
+            val buffer = ByteArray(4096)
+
+            while (running.get()) {
+                try {
+                    val count = port.read(buffer, READ_TIMEOUT_MS)
+                    if (count > 0) {
+                        output.write(buffer, 0, count)
+                        output.flush()
+                    }
+                } catch (_: IOException) {
+                    close()
+                } catch (_: Exception) {
+                    close()
+                }
+            }
+        }
+
+        private fun copyRustToSerial() {
+            val input = FileInputStream(bridgeFd)
+            val buffer = ByteArray(4096)
+
+            while (running.get()) {
+                try {
+                    val count = input.read(buffer)
+                    if (count < 0) {
+                        close()
+                        return
+                    }
+                    if (count > 0) {
+                        port.write(buffer.copyOf(count), WRITE_TIMEOUT_MS)
+                    }
+                } catch (_: IOException) {
+                    close()
+                } catch (_: Exception) {
+                    close()
+                }
+            }
+        }
     }
 }

src-tauri/gen/android/build.gradle.kts

@@ -13,10 +13,10 @@ allprojects {
     repositories {
         google()
         mavenCentral()
+        maven(url = "https://jitpack.io")
     }
 }
 
 tasks.register("clean").configure {
     delete("build")
 }
-

src-tauri/permissions/usb-serial/default.toml

@@ -0,0 +1,66 @@
+[default]
+description = "Allows Android USB serial plugin commands."
+permissions = [
+  "allow-usb-serial-list",
+  "allow-usb-serial-open",
+  "allow-usb-serial-close",
+  "allow-usb-serial-list-camel",
+  "allow-usb-serial-open-camel",
+  "allow-usb-serial-close-camel",
+  "allow-local-commands"
+]
+
+[[permission]]
+identifier = "allow-usb-serial-list"
+description = "Allows listing Android USB serial devices."
+commands.allow = ["plugin:usb-serial|usb_serial_list"]
+
+[[permission]]
+identifier = "allow-usb-serial-open"
+description = "Allows opening Android USB serial devices."
+commands.allow = ["plugin:usb-serial|usb_serial_open"]
+
+[[permission]]
+identifier = "allow-usb-serial-close"
+description = "Allows closing Android USB serial devices."
+commands.allow = ["plugin:usb-serial|usb_serial_close"]
+
+[[permission]]
+identifier = "allow-usb-serial-list-camel"
+description = "Allows listing Android USB serial devices via camelCase command."
+commands.allow = ["plugin:usb-serial|usbSerialList"]
+
+[[permission]]
+identifier = "allow-usb-serial-open-camel"
+description = "Allows opening Android USB serial devices via camelCase command."
+commands.allow = ["plugin:usb-serial|usbSerialOpen"]
+
+[[permission]]
+identifier = "allow-usb-serial-close-camel"
+description = "Allows closing Android USB serial devices via camelCase command."
+commands.allow = ["plugin:usb-serial|usbSerialClose"]
+
+[[permission]]
+identifier = "allow-local-commands"
+description = "Allows application commands used by the Android frontend."
+commands.allow = [
+  "file_explorer_list",
+  "serial_enum",
+  "serial_connect",
+  "serial_connect_fd",
+  "serial_disconnect",
+  "serial_export_csv",
+  "serial_has_record_data",
+  "serial_export_csv_to_path",
+  "serial_import_csv",
+  "serial_import_csv_from_path",
+  "win_minimize",
+  "win_toggle_maximize",
+  "win_close",
+  "devkit_status",
+  "devkit_start",
+  "devkit_stop",
+  "devkit_get_config",
+  "devkit_set_config",
+  "devkit_process_export"
+]

src-tauri/src/commands/serial.rs

@@ -13,6 +13,7 @@ use std::path::{Path, PathBuf};
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 use tauri::{async_runtime::JoinHandle, AppHandle, Manager, State};
+#[cfg(not(target_os = "android"))]
 use tokio_serial::{available_ports, SerialPortBuilderExt};
 use tokio_util::sync::CancellationToken;
 
@@ -113,6 +114,13 @@ pub async fn shutdown_active_session(
 
 #[tauri::command]
 pub fn serial_enum() -> Result<Vec<String>, SerialError> {
+    #[cfg(target_os = "android")]
+    {
+        Ok(Vec::new())
+    }
+
+    #[cfg(not(target_os = "android"))]
+    {
         let ports = available_ports()
             .map_err(|_| SerialError::ScanError)?
             .into_iter()
@@ -127,8 +135,10 @@ pub fn serial_enum() -> Result<Vec<String>, SerialError> {
             .collect();
 
         Ok(ports)
+    }
 }
 
+#[cfg(not(target_os = "android"))]
 #[tauri::command]
 pub async fn serial_connect(
     app: AppHandle,

src-tauri/src/lib.rs

@@ -10,6 +10,16 @@ use commands::serial::SerialConnectionState;
 #[cfg(feature = "devkit")]
 use tauri::Manager;
 
+#[cfg(target_os = "android")]
+fn usb_serial_plugin<R: tauri::Runtime>() -> tauri::plugin::TauriPlugin<R> {
+    tauri::plugin::Builder::new("usb-serial")
+        .setup(|_app, api| {
+            api.register_android_plugin("com.lenn.tauri_serial", "UsbSerialPlugin")?;
+            Ok(())
+        })
+        .build()
+}
+
 #[cfg(feature = "devkit")]
 fn start_server_exe(exe_path: &std::path::Path) {
     let mut command = std::process::Command::new(exe_path);
@@ -66,6 +76,9 @@ pub fn run() {
         .manage(SerialConnectionState::default())
         .plugin(tauri_plugin_opener::init());
 
+    #[cfg(target_os = "android")]
+    let builder = builder.plugin(usb_serial_plugin());
+
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     let builder = builder.plugin(tauri_plugin_updater::Builder::new().build());
 
@@ -177,7 +190,6 @@ pub fn run() {
     let builder = builder.invoke_handler(tauri::generate_handler![
         commands::file_explorer::file_explorer_list,
         commands::serial::serial_enum,
-        commands::serial::serial_connect,
         commands::serial::serial_connect_fd,
         commands::serial::serial_disconnect,
         commands::serial::serial_export_csv,
@@ -200,7 +212,6 @@ pub fn run() {
     let builder = builder.invoke_handler(tauri::generate_handler![
         commands::file_explorer::file_explorer_list,
         commands::serial::serial_enum,
-        commands::serial::serial_connect,
         commands::serial::serial_connect_fd,
         commands::serial::serial_disconnect,
         commands::serial::serial_export_csv,

src-tauri/src/serial_core/raw_fd_stream.rs

@@ -34,8 +34,9 @@ impl RawFdStream {
 
 impl Drop for RawFdStream {
     fn drop(&mut self) {
-        // We don't close the fd here - it's managed by the UsbDeviceConnection in Kotlin.
-        // The Kotlin side is responsible for closing.
+        unsafe {
+            libc::close(*self.inner.get_ref());
+        }
     }
 }
 

src/lib/components/HudPanel.svelte

@@ -460,6 +460,12 @@
     color: rgb(var(--hud-orange-rgb) / 0.96);
   }
 
+  @media (max-width: 900px) {
+    .window-controls {
+      display: none;
+    }
+  }
+
   .control-bar {
     display: grid;
     gap: 0.45rem;

src/lib/components/SignalChart.svelte

@@ -200,7 +200,6 @@
     border-color: transparent;
     opacity: 0;
     transform: translateX(var(--offset-x)) scale(0.98) rotate(-0.6deg);
-    filter: blur(1.3px);
     pointer-events: none;
     transition-delay: 0ms;
   }
@@ -302,6 +301,7 @@
     stroke-linecap: round;
     stroke-linejoin: round;
     filter: drop-shadow(0 0 2px rgb(0 0 0 / 0.42));
+    will-change: d;
   }
 
   .series-line.tone-cyan {
@@ -397,6 +397,10 @@
       aspect-ratio: 1.5 / 1;
       min-block-size: 10.1rem;
     }
+
+    .chart-stage {
+      block-size: clamp(5.7rem, 7.6vw, 6.9rem);
+    }
   }
 
   @media (max-height: 900px) {
@@ -452,6 +456,21 @@
       inline-size: 100%;
       aspect-ratio: 1.7 / 1;
       min-block-size: 0;
+      background: linear-gradient(160deg, rgb(var(--hud-surface-alt-rgb) / 0.86) 0%, rgb(var(--hud-surface-deep-rgb) / 0.9) 100%);
+      box-shadow: inset 0 0 0 1px rgb(var(--hud-border-strong-rgb) / 0.08), 0 0 8px rgb(var(--hud-glow-rgb) / 0.1);
+    }
+
+    .series-line {
+      filter: none;
+    }
+
+    .scan-haze {
+      display: none;
+    }
+
+    .chart-stage {
+      background: linear-gradient(180deg, rgb(var(--hud-surface-alt-rgb) / 0.78), rgb(var(--hud-surface-deep-rgb) / 0.88));
+      box-shadow: none;
     }
   }
 </style>

src/lib/components/SummaryCurve.svelte

@@ -637,6 +637,20 @@
   @media (max-width: 900px) {
     .signal-panel {
       inline-size: 100%;
+      background: linear-gradient(160deg, rgb(var(--hud-surface-alt-rgb) / 0.86) 0%, rgb(var(--hud-surface-deep-rgb) / 0.9) 100%);
+      box-shadow: inset 0 0 0 1px rgb(var(--hud-border-strong-rgb) / 0.08), 0 0 8px rgb(var(--hud-glow-rgb) / 0.1);
+    }
+
+    .summary-line {
+      filter: none;
+    }
+
+    .summary-dot {
+      filter: none;
+    }
+
+    .chart-stage {
+      background: linear-gradient(180deg, rgb(var(--hud-surface-alt-rgb) / 0.78), rgb(var(--hud-surface-deep-rgb) / 0.88));
     }
   }
 </style>

src/routes/+page.svelte

@@ -44,6 +44,29 @@
     dtsMs: number;
   }
 
+  interface AndroidUsbSerialDevice {
+    name: string;
+    vendorId: number;
+    productId: number;
+    manufacturer: string;
+    product: string;
+    serial: string;
+    hasPermission: boolean;
+  }
+
+  interface AndroidUsbSerialListResult {
+    devices: AndroidUsbSerialDevice[];
+  }
+
+  interface AndroidUsbSerialOpenResult {
+    fd: number;
+    name: string;
+    vendorId: number;
+    productId: number;
+  }
+
+  type AndroidUsbSerialCommand = "list" | "open" | "close";
+
   const copyByLocale: Record<LocaleCode, HudCopy> = {
     "zh-CN": {
       appName: "JE-Skin",
@@ -203,6 +226,7 @@
   let connectionState: ConnectionState = "offline";
   let serialPortValue = "COM14";
   let serialPortOptions = ["COM4", "COM9", "COM14", "COM16"];
+  let androidUsbSerialDevices: AndroidUsbSerialDevice[] = [];
   let isRefreshingPorts = false;
   let connectionNotice = "";
   let connectionNoticeTone: HudNoticeTone = "info";
@@ -287,6 +311,66 @@
     return typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
   }
 
+  function isAndroidRuntime(): boolean {
+    if (!isTauriRuntime() || typeof navigator === "undefined") {
+      return false;
+    }
+
+    return /Android/i.test(navigator.userAgent);
+  }
+
+  function formatAndroidUsbSerialLabel(device: AndroidUsbSerialDevice): string {
+    const product = device.product || device.manufacturer || "USB Serial";
+    const ids = `${device.vendorId.toString(16).padStart(4, "0")}:${device.productId
+      .toString(16)
+      .padStart(4, "0")}`;
+    return `${product} (${ids})`;
+  }
+
+  function findAndroidUsbSerialDevice(name: string): AndroidUsbSerialDevice | null {
+    return androidUsbSerialDevices.find((device) => device.name === name) ?? null;
+  }
+
+  function normalizeAndroidUsbSerialDevices(value: unknown): AndroidUsbSerialDevice[] {
+    if (Array.isArray(value)) {
+      return value.filter((device): device is AndroidUsbSerialDevice => {
+        return typeof device === "object" && device !== null && typeof (device as AndroidUsbSerialDevice).name === "string";
+      });
+    }
+
+    if (typeof value === "object" && value !== null) {
+      return Object.values(value).filter((device): device is AndroidUsbSerialDevice => {
+        return typeof device === "object" && device !== null && typeof (device as AndroidUsbSerialDevice).name === "string";
+      });
+    }
+
+    return [];
+  }
+
+  async function invokeAndroidUsbSerial<T>(
+    command: AndroidUsbSerialCommand,
+    args?: Record<string, unknown>
+  ): Promise<T> {
+    const commandNames: Record<AndroidUsbSerialCommand, [string, string]> = {
+      list: ["usb_serial_list", "usbSerialList"],
+      open: ["usb_serial_open", "usbSerialOpen"],
+      close: ["usb_serial_close", "usbSerialClose"]
+    };
+
+    const [primary, fallback] = commandNames[command];
+
+    try {
+      return await invoke<T>(`plugin:usb-serial|${primary}`, args);
+    } catch (error) {
+      const message = String(error);
+      if (!message.includes("No command")) {
+        throw error;
+      }
+
+      return await invoke<T>(`plugin:usb-serial|${fallback}`, args);
+    }
+  }
+
   function clamp(value: number, min: number, max: number): number {
     return Math.min(max, Math.max(min, value));
   }
@@ -1221,6 +1305,10 @@
 
   function handlePortChange(event: CustomEvent<string>): void {
     serialPortValue = event.detail;
+    if (isAndroidRuntime()) {
+      const selectedDevice = findAndroidUsbSerialDevice(serialPortValue);
+      deviceValue = selectedDevice ? formatAndroidUsbSerialLabel(selectedDevice) : "Android USB Serial";
+    }
     connectionState = "offline";
     connectionNotice = "";
     clearHudPanels();
@@ -1256,7 +1344,7 @@
           case "InvalidConfig":
             return "当前串口配置无效，请重新选择端口。";
           default:
-            return "串口连接失败，请稍后重试。";
+            return `串口连接失败：${errorCode}`;
         }
       }
 
@@ -1277,7 +1365,7 @@
         case "InvalidConfig":
           return "The selected serial port is invalid. Choose another port.";
         default:
-          return "Connection failed. Please try again.";
+          return `Connection failed: ${errorCode}`;
       }
     }
 
@@ -1288,14 +1376,16 @@
     const errorCode = normalizeInvokeError(error);
 
     if (locale === "zh-CN") {
-      return errorCode === "ScanError"
-        ? "串口列表刷新失败，请确认系统串口服务正常。"
-        : "刷新串口列表失败，请稍后重试。";
+      if (errorCode === "ScanError") {
+        return "串口列表刷新失败，请确认系统串口服务正常。";
+      }
+
+      return `刷新串口列表失败：${errorCode}`;
     }
 
     return errorCode === "ScanError"
       ? "Refreshing serial ports failed. Check whether the OS serial service is available."
-      : "Refreshing serial ports failed. Please try again.";
+      : `Refreshing serial ports failed: ${errorCode}`;
   }
 
   function resolveExportNotice(error: unknown): string {
@@ -1350,6 +1440,33 @@
     isRefreshingPorts = true;
 
     try {
+      try {
+        const result = await invokeAndroidUsbSerial<AndroidUsbSerialListResult>("list");
+        androidUsbSerialDevices = normalizeAndroidUsbSerialDevices(result.devices);
+        serialPortOptions = androidUsbSerialDevices.map((device) => device.name);
+
+        if (serialPortOptions.includes(serialPortValue)) {
+          return;
+        }
+
+        serialPortValue = serialPortOptions[0] ?? "";
+        const selectedDevice = findAndroidUsbSerialDevice(serialPortValue);
+        deviceValue = selectedDevice ? formatAndroidUsbSerialLabel(selectedDevice) : "Android USB Serial";
+
+        if (!serialPortValue) {
+          connectionState = "offline";
+          clearHudPanels();
+          connectionNotice =
+            locale === "zh-CN" ? "未发现 USB 串口设备，请确认已通过 OTG 接入设备。" : "No USB serial device found.";
+          connectionNoticeTone = "warn";
+        }
+        return;
+      } catch (androidError) {
+        if (isAndroidRuntime()) {
+          throw androidError;
+        }
+      }
+
       const ports = await invoke<string[]>("serial_enum");
       serialPortOptions = ports;
 
@@ -1390,7 +1507,28 @@
     connectionNotice = "";
 
     try {
-      const result = await invoke<SerialConnectResult>("serial_connect", { port: event.detail });
+      let result: SerialConnectResult;
+
+      if (isAndroidRuntime()) {
+        const selectedDevice = findAndroidUsbSerialDevice(event.detail);
+        const opened = await invokeAndroidUsbSerial<AndroidUsbSerialOpenResult>("open", {
+          name: event.detail,
+          vendorId: selectedDevice?.vendorId,
+          productId: selectedDevice?.productId
+        });
+        result = await invoke<SerialConnectResult>("serial_connect_fd", {
+          fd: opened.fd,
+          deviceName: opened.name,
+          device_name: opened.name
+        });
+        const openedDevice = findAndroidUsbSerialDevice(opened.name) ?? selectedDevice;
+        deviceValue = openedDevice
+          ? formatAndroidUsbSerialLabel(openedDevice)
+          : `USB Serial (${opened.vendorId.toString(16)}:${opened.productId.toString(16)})`;
+      } else {
+        result = await invoke<SerialConnectResult>("serial_connect", { port: event.detail });
+      }
+
       connectionState = result.connected ? "online" : "offline";
       serialPortValue = result.port;
       connectionNotice = "";
@@ -1398,6 +1536,13 @@
       clearHudPanels();
       console.info("[serial] connect result:", result.message);
     } catch (error) {
+      if (isAndroidRuntime()) {
+        try {
+          await invokeAndroidUsbSerial("close");
+        } catch (closeError) {
+          console.warn("USB serial close after failed connect failed:", closeError);
+        }
+      }
       connectionState = "offline";
       connectionNotice = resolveSerialNotice(error, "connect");
       connectionNoticeTone = "warn";
@@ -1409,6 +1554,9 @@
   async function handleSerialDisconnect(): Promise<void> {
     try {
       const result = await invoke<SerialConnectResult>("serial_disconnect");
+      if (isAndroidRuntime()) {
+        await invokeAndroidUsbSerial("close");
+      }
       connectionState = result.connected ? "online" : "offline";
       connectionNotice = "";
       connectionNoticeTone = "info";
@@ -2014,6 +2162,27 @@
     mix-blend-mode: soft-light;
   }
 
+  @media (max-width: 900px) {
+    .hud-noise {
+      display: none;
+    }
+
+    .hud-vignette {
+      opacity: 0.4;
+    }
+
+    .hud-gradient {
+      background:
+        linear-gradient(170deg, var(--hud-bg-20) 0%, var(--hud-bg-10) 56%, var(--hud-bg-30) 100%);
+    }
+
+    .hud-layout {
+      gap: clamp(0.3rem, 1vw, 0.6rem);
+      padding: clamp(0.4rem, 1.2vw, 0.8rem);
+      box-shadow: inset 0 -12px 24px rgb(0 0 0 / 0.24);
+    }
+  }
+
   .hud-layout {
     position: relative;
     z-index: 1;