Remove unused _ConnectionIndicator and _StatusDot widgets

Delete dead code that triggered an unused_element analyzer warning.
_ConnectionIndicator was unreferenced and _StatusDot was only used by it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -42,3 +42,7 @@ android {
 flutter {
     source = "../.."
 }
+
+dependencies {
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+}

android/app/src/main/AndroidManifest.xml

@@ -1,10 +1,15 @@
 <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.CHANGE_WIFI_MULTICAST_STATE"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC"/>
 
     <application
-        android:label="wireless_text_syncer_android"
+        android:label="文本同步"
-        android:name="${applicationName}"
+        android:name=".WirelessTextSyncerApplicationHolder"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:usesCleartextTraffic="true">
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -27,6 +32,28 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <activity
+            android:name=".QuickSendActivity"
+            android:exported="false"
+            android:theme="@style/TransparentBottomSheetTheme"
+            android:excludeFromRecents="true"
+            android:finishOnTaskLaunch="true"
+            android:launchMode="singleTop"
+            android:windowSoftInputMode="adjustResize" />
+        <service
+            android:name=".ConnectionService"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
+        <service
+            android:name=".QuickSendTileService"
+            android:exported="true"
+            android:icon="@drawable/ic_quick_send_tile"
+            android:label="文本同步"
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE" />
+            </intent-filter>
+        </service>
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/ConnectionService.kt

@@ -0,0 +1,384 @@
+package com.wirelesstextsyncer.wireless_text_syncer_android
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.os.Handler
+import android.os.IBinder
+import android.os.Looper
+import android.util.Log
+import io.flutter.plugin.common.EventChannel
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+import okhttp3.WebSocket
+import okhttp3.WebSocketListener
+import org.json.JSONObject
+import java.util.concurrent.TimeUnit
+
+class ConnectionService : Service() {
+    private val tag = "WTS"
+    private val client = OkHttpClient.Builder()
+        .pingInterval(5, TimeUnit.SECONDS)
+        .build()
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        Log.d(tag, "ConnectionService onCreate")
+        ensureNotificationChannel()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        Log.d(tag, "ConnectionService onStartCommand action=${intent?.action}")
+        when (intent?.action) {
+            ACTION_CONNECT -> {
+                val host = intent.getStringExtra(EXTRA_HOST).orEmpty()
+                val port = intent.getIntExtra(EXTRA_PORT, 8181)
+                val name = intent.getStringExtra(EXTRA_NAME).orEmpty()
+                connectWebSocket(host, port, name)
+            }
+            ACTION_DISCONNECT -> disconnectWebSocket("已断开连接")
+        }
+        return START_STICKY
+    }
+
+    override fun onDestroy() {
+        Log.d(tag, "ConnectionService onDestroy")
+        currentSocket?.close(1000, "service destroyed")
+        currentSocket = null
+        super.onDestroy()
+    }
+
+    private fun connectWebSocket(host: String, port: Int, name: String) {
+        Log.d(tag, "connectWebSocket host=$host port=$port name=$name")
+        if (host.isBlank()) {
+            updateState(connected = false, connecting = false, host = host, port = port, lastError = "请先填写 Windows IP")
+            return
+        }
+
+        getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putString(KEY_HOST, host)
+            .putInt(KEY_PORT, port)
+            .putString(KEY_NAME, name)
+            .apply()
+
+        try {
+            Log.d(tag, "startForeground connecting notification")
+            startForeground(NOTIFICATION_ID, buildNotification(host, port, "正在连接"))
+        } catch (exception: Exception) {
+            Log.e(tag, "startForeground failed", exception)
+            updateState(
+                connected = false,
+                connecting = false,
+                host = host,
+                port = port,
+                name = name,
+                lastError = exception.message ?: "前台服务启动失败"
+            )
+            stopSelf()
+            return
+        }
+        currentSocket?.close(1000, "reconnect")
+        updateState(connected = false, connecting = true, host = host, port = port, name = name, lastError = null)
+
+        val request = Request.Builder().url("ws://$host:$port").build()
+        Log.d(tag, "Creating WebSocket ws://$host:$port")
+        currentSocket = client.newWebSocket(request, object : WebSocketListener() {
+            override fun onOpen(webSocket: WebSocket, response: Response) {
+                Log.d(tag, "WebSocket onOpen code=${response.code}")
+                if (currentSocket != webSocket) {
+                    Log.d(tag, "Ignoring stale WebSocket onOpen")
+                    return
+                }
+                updateState(connected = true, connecting = false, host = host, port = port, name = name, lastError = null)
+                Handler(Looper.getMainLooper()).post {
+                    startForeground(NOTIFICATION_ID, buildNotification(host, port, "已连接"))
+                }
+            }
+
+            override fun onMessage(webSocket: WebSocket, text: String) {
+                Log.d(tag, "WebSocket onMessage $text")
+                if (currentSocket != webSocket) {
+                    Log.d(tag, "Ignoring stale WebSocket onMessage")
+                    return
+                }
+
+                updateServiceInfo(text, host, port)
+            }
+
+            override fun onClosed(webSocket: WebSocket, code: Int, reason: String) {
+                Log.d(tag, "WebSocket onClosed code=$code reason=$reason")
+                if (currentSocket != webSocket) {
+                    Log.d(tag, "Ignoring stale WebSocket onClosed")
+                    return
+                }
+                currentSocket = null
+                updateState(connected = false, connecting = false, host = host, port = port, name = state.name, lastError = null)
+                Handler(Looper.getMainLooper()).post {
+                    stopForeground(STOP_FOREGROUND_REMOVE)
+                }
+            }
+
+            override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
+                Log.e(tag, "WebSocket onFailure responseCode=${response?.code}", t)
+                if (currentSocket != webSocket) {
+                    Log.d(tag, "Ignoring stale WebSocket onFailure")
+                    return
+                }
+                currentSocket = null
+                val errorMessage = if (state.connected) {
+                    "桌面端服务已断开"
+                } else {
+                    t.message ?: "连接失败"
+                }
+                updateState(
+                    connected = false,
+                    connecting = false,
+                    host = host,
+                    port = port,
+                    name = state.name.ifBlank { name },
+                    lastError = errorMessage
+                )
+                Handler(Looper.getMainLooper()).post {
+                    stopForeground(STOP_FOREGROUND_REMOVE)
+                }
+            }
+        })
+    }
+
+    private fun disconnectWebSocket(message: String?) {
+        Log.d(tag, "disconnectWebSocket message=$message")
+        currentSocket?.close(1000, "user disconnected")
+        currentSocket = null
+        updateState(connected = false, connecting = false, lastError = message)
+        stopForeground(STOP_FOREGROUND_REMOVE)
+        stopSelf()
+    }
+
+    private fun updateServiceInfo(text: String, fallbackHost: String, fallbackPort: Int) {
+        try {
+            val json = JSONObject(text)
+            if (json.optString("type") != "wirelessTextSyncer.service") {
+                return
+            }
+
+            val serviceHost = json.optString("host", fallbackHost).ifBlank { fallbackHost }
+            val servicePort = json.optInt("port", fallbackPort)
+            val serviceName = json.optString("name").ifBlank { state.name }
+            getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+                .edit()
+                .putString(KEY_HOST, serviceHost)
+                .putInt(KEY_PORT, servicePort)
+                .putString(KEY_NAME, serviceName)
+                .apply()
+            updateState(
+                connected = true,
+                connecting = false,
+                host = serviceHost,
+                port = servicePort,
+                name = serviceName,
+                lastError = null
+            )
+        } catch (exception: Exception) {
+            Log.e(tag, "Failed to parse service info message", exception)
+        }
+    }
+
+    private fun buildNotification(host: String, port: Int, status: String): Notification {
+        val builder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            Notification.Builder(this, CHANNEL_ID)
+        } else {
+            Notification.Builder(this)
+        }
+
+        return builder
+            .setSmallIcon(android.R.drawable.stat_sys_upload_done)
+            .setContentTitle("文本同步")
+            .setContentText("$status $host:$port")
+            .setOngoing(true)
+            .setShowWhen(false)
+            .build()
+    }
+
+    private fun ensureNotificationChannel() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
+            return
+        }
+
+        val channel = NotificationChannel(CHANNEL_ID, "文本同步连接", NotificationManager.IMPORTANCE_LOW)
+        val manager = getSystemService(NotificationManager::class.java)
+        manager.createNotificationChannel(channel)
+    }
+
+    companion object {
+        private const val ACTION_CONNECT = "wireless_text_syncer.CONNECT"
+        private const val ACTION_DISCONNECT = "wireless_text_syncer.DISCONNECT"
+        private const val EXTRA_HOST = "host"
+        private const val EXTRA_PORT = "port"
+        private const val EXTRA_NAME = "name"
+        private const val CHANNEL_ID = "wireless_text_syncer_connection"
+        private const val NOTIFICATION_ID = 1001
+        private const val PREFS = "wireless_text_syncer_connection"
+        private const val KEY_HOST = "server_host"
+        private const val KEY_PORT = "server_port"
+        private const val KEY_NAME = "server_name"
+
+        private val mainHandler = Handler(Looper.getMainLooper())
+        @Volatile private var currentSocket: WebSocket? = null
+        @Volatile private var state = ConnectionStateSnapshot()
+        @Volatile var eventSink: EventChannel.EventSink? = null
+
+        fun connect(context: Context, host: String, port: Int, name: String = "") {
+            Log.d("WTS", "ConnectionService.connect requested host=$host port=$port name=$name sdk=${Build.VERSION.SDK_INT}")
+            val intent = Intent(context, ConnectionService::class.java)
+                .setAction(ACTION_CONNECT)
+                .putExtra(EXTRA_HOST, host)
+                .putExtra(EXTRA_PORT, port)
+                .putExtra(EXTRA_NAME, name)
+            try {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                    context.startForegroundService(intent)
+                } else {
+                    context.startService(intent)
+                }
+            } catch (exception: Exception) {
+                Log.e("WTS", "Failed to start ConnectionService", exception)
+                updateState(
+                    connected = false,
+                    connecting = false,
+                    host = host,
+                    port = port,
+                    name = name,
+                    lastError = exception.message ?: "连接服务启动失败"
+                )
+                throw exception
+            }
+        }
+
+        fun disconnect(context: Context) {
+            Log.d("WTS", "ConnectionService.disconnect requested")
+            try {
+                context.startService(Intent(context, ConnectionService::class.java).setAction(ACTION_DISCONNECT))
+            } catch (exception: Exception) {
+                Log.e("WTS", "Failed to stop ConnectionService", exception)
+            }
+        }
+
+        fun sendText(text: String): Boolean {
+            Log.d("WTS", "ConnectionService.sendText length=${text.length} connected=${state.connected}")
+            val socket = currentSocket ?: return false
+            if (!state.connected || text.isEmpty()) {
+                return false
+            }
+
+            return sendAction(socket, "replaceAll", text)
+        }
+
+        fun sendEnter(): Boolean {
+            Log.d("WTS", "ConnectionService.sendEnter connected=${state.connected}")
+            val socket = currentSocket ?: return false
+            if (!state.connected) {
+                return false
+            }
+
+            return sendAction(socket, "enter", null)
+        }
+
+        fun sendMute(muted: Boolean): Boolean {
+            Log.d("WTS", "ConnectionService.sendMute muted=$muted connected=${state.connected}")
+            val socket = currentSocket ?: return false
+            if (!state.connected) {
+                return false
+            }
+
+            return sendMuteAction(socket, muted)
+        }
+
+        private fun sendMuteAction(socket: WebSocket, muted: Boolean): Boolean {
+            val payload = JSONObject()
+                .put("action", "setMute")
+                .put("muted", muted)
+                .toString()
+            val sent = socket.send(payload)
+            if (!sent && currentSocket == socket) {
+                currentSocket = null
+                updateState(
+                    connected = false,
+                    connecting = false,
+                    lastError = "连接已断开"
+                )
+            }
+
+            return sent
+        }
+
+        private fun sendAction(socket: WebSocket, action: String, text: String?): Boolean {
+            val payload = JSONObject()
+                .put("action", action)
+                .apply {
+                    if (text != null) {
+                        put("text", text)
+                    }
+                }
+                .toString()
+            val sent = socket.send(payload)
+            if (!sent && currentSocket == socket) {
+                currentSocket = null
+                updateState(
+                    connected = false,
+                    connecting = false,
+                    lastError = "连接已断开"
+                )
+            }
+
+            return sent
+        }
+
+        fun stateMap(): Map<String, Any?> {
+            val snapshot = state
+            return mapOf(
+                "connected" to snapshot.connected,
+                "connecting" to snapshot.connecting,
+                "host" to snapshot.host,
+                "port" to snapshot.port,
+                "name" to snapshot.name,
+                "lastError" to snapshot.lastError
+            )
+        }
+
+        private fun updateState(
+            connected: Boolean,
+            connecting: Boolean,
+            host: String = state.host,
+            port: Int = state.port,
+            name: String = state.name,
+            lastError: String? = null
+        ) {
+            Log.d(
+                "WTS",
+                "updateState connected=$connected connecting=$connecting host=$host port=$port name=$name error=$lastError"
+            )
+            state = ConnectionStateSnapshot(connected, connecting, host, port, name, lastError)
+            mainHandler.post {
+                eventSink?.success(stateMap())
+                QuickSendTileService.requestTileRefresh()
+            }
+        }
+    }
+
+    private data class ConnectionStateSnapshot(
+        val connected: Boolean = false,
+        val connecting: Boolean = false,
+        val host: String = "",
+        val port: Int = 8181,
+        val name: String = "",
+        val lastError: String? = null
+    )
+}

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/DiscoveryClient.kt

@@ -0,0 +1,96 @@
+package com.wirelesstextsyncer.wireless_text_syncer_android
+
+import android.content.Context
+import android.net.wifi.WifiManager
+import android.util.Log
+import org.json.JSONObject
+import java.net.DatagramPacket
+import java.net.DatagramSocket
+import java.net.InetAddress
+
+object DiscoveryClient {
+    private const val tag = "WTS"
+    private const val discoveryPort = 8182
+    private const val defaultServicePort = 8181
+
+    fun discover(context: Context): List<DiscoveredService> {
+        Log.d(tag, "Discovery started")
+        val devices = mutableListOf<DiscoveredService>()
+        val seen = mutableSetOf<String>()
+        var multicastLock: WifiManager.MulticastLock? = null
+        try {
+            val wifi = context.applicationContext.getSystemService(Context.WIFI_SERVICE) as? WifiManager
+            multicastLock = wifi?.createMulticastLock("wireless-text-syncer-discovery")
+            multicastLock?.setReferenceCounted(false)
+            multicastLock?.acquire()
+
+            DatagramSocket().use { socket ->
+                socket.broadcast = true
+                socket.soTimeout = 450
+                val request = JSONObject()
+                    .put("type", "wirelessTextSyncer.discovery")
+                    .put("version", 1)
+                    .toString()
+                    .toByteArray(Charsets.UTF_8)
+                val packet = DatagramPacket(
+                    request,
+                    request.size,
+                    InetAddress.getByName("255.255.255.255"),
+                    discoveryPort
+                )
+                socket.send(packet)
+
+                val deadline = System.currentTimeMillis() + 1600
+                while (System.currentTimeMillis() < deadline) {
+                    try {
+                        val buffer = ByteArray(2048)
+                        val response = DatagramPacket(buffer, buffer.size)
+                        socket.receive(response)
+                        val json = JSONObject(String(response.data, 0, response.length, Charsets.UTF_8))
+                        if (json.optString("type") != "wirelessTextSyncer.service") {
+                            continue
+                        }
+
+                        val host = json.optString("host", response.address.hostAddress.orEmpty())
+                        val port = json.optInt("port", defaultServicePort)
+                        val key = "$host:$port"
+                        if (seen.add(key)) {
+                            Log.d(tag, "Discovery found ${json.optString("name", host)} $key")
+                            devices += DiscoveredService(
+                                name = json.optString("name", host),
+                                host = host,
+                                port = port
+                            )
+                        }
+                    } catch (_: Exception) {
+                    }
+                }
+            }
+        } catch (exception: Exception) {
+            Log.e(tag, "Discovery failed", exception)
+        } finally {
+            multicastLock?.let {
+                if (it.isHeld) {
+                    it.release()
+                }
+            }
+        }
+
+        Log.d(tag, "Discovery finished count=${devices.size}")
+        return devices
+    }
+}
+
+data class DiscoveredService(
+    val name: String,
+    val host: String,
+    val port: Int
+) {
+    fun toMap(): Map<String, Any> {
+        return mapOf(
+            "name" to name,
+            "host" to host,
+            "port" to port
+        )
+    }
+}

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/MainActivity.kt

@@ -1,5 +1,85 @@
 package com.wirelesstextsyncer.wireless_text_syncer_android
 
+import android.util.Log
+import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.embedding.android.FlutterActivity
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MethodChannel
 
-class MainActivity : FlutterActivity()
+class MainActivity : FlutterActivity() {
+    private val tag = "WTS"
+    private val connectionChannel = "wireless_text_syncer/connection"
+    private val connectionStateChannel = "wireless_text_syncer/connection_state"
+
+    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
+        super.configureFlutterEngine(flutterEngine)
+
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, connectionChannel)
+            .setMethodCallHandler { call, result ->
+                when (call.method) {
+                    "connect" -> {
+                        val host = call.argument<String>("host").orEmpty()
+                        val port = call.argument<Int>("port") ?: 8181
+                        val name = call.argument<String>("name").orEmpty()
+                        Log.d(tag, "MethodChannel connect host=$host port=$port name=$name")
+                        try {
+                            ConnectionService.connect(this, host, port, name)
+                            result.success(null)
+                        } catch (exception: Exception) {
+                            Log.e(tag, "MethodChannel connect failed", exception)
+                            result.error("CONNECT_FAILED", exception.message, null)
+                        }
+                    }
+                    "disconnect" -> {
+                        Log.d(tag, "MethodChannel disconnect")
+                        ConnectionService.disconnect(this)
+                        result.success(null)
+                    }
+                    "sendText" -> {
+                        val text = call.argument<String>("text").orEmpty()
+                        Log.d(tag, "MethodChannel sendText length=${text.length}")
+                        result.success(ConnectionService.sendText(text))
+                    }
+                    "sendEnter" -> {
+                        Log.d(tag, "MethodChannel sendEnter")
+                        result.success(ConnectionService.sendEnter())
+                    }
+                    "sendMute" -> {
+                        val muted = call.argument<Boolean>("muted") ?: false
+                        Log.d(tag, "MethodChannel sendMute muted=$muted")
+                        result.success(ConnectionService.sendMute(muted))
+                    }
+                    "getState" -> {
+                        Log.d(tag, "MethodChannel getState")
+                        result.success(ConnectionService.stateMap())
+                    }
+                    "startDiscovery" -> startDiscovery(result)
+                    "stopDiscovery" -> result.success(null)
+                    else -> result.notImplemented()
+                }
+            }
+
+        EventChannel(flutterEngine.dartExecutor.binaryMessenger, connectionStateChannel)
+            .setStreamHandler(object : EventChannel.StreamHandler {
+                override fun onListen(arguments: Any?, events: EventChannel.EventSink?) {
+                    ConnectionService.eventSink = events
+                    events?.success(ConnectionService.stateMap())
+                }
+
+                override fun onCancel(arguments: Any?) {
+                    ConnectionService.eventSink = null
+                }
+            })
+    }
+
+    private fun startDiscovery(result: MethodChannel.Result) {
+        Thread {
+            val devices = DiscoveryClient.discover(applicationContext).map { it.toMap() }
+
+            runOnUiThread {
+                Log.d(tag, "Discovery finished count=${devices.size}")
+                result.success(devices)
+            }
+        }.start()
+    }
+}

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/QuickSendActivity.kt

@@ -0,0 +1,577 @@
+package com.wirelesstextsyncer.wireless_text_syncer_android
+
+import android.app.Activity
+import android.graphics.Color
+import android.graphics.PorterDuff
+import android.graphics.Typeface
+import android.graphics.drawable.GradientDrawable
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import android.view.Gravity
+import android.view.View
+import android.view.WindowInsets
+import android.view.WindowManager
+import android.view.inputmethod.InputMethodManager
+import android.content.Context
+import android.widget.EditText
+import android.widget.FrameLayout
+import android.widget.ImageView
+import android.widget.LinearLayout
+import android.widget.Switch
+import android.widget.TextView
+import org.json.JSONArray
+
+class QuickSendActivity : Activity() {
+    private lateinit var input: EditText
+    private lateinit var sendButton: LinearLayout
+    private lateinit var sendIcon: ImageView
+    private lateinit var sendLabel: TextView
+    private lateinit var connectionIcon: ImageView
+    private lateinit var endpointText: TextView
+    private lateinit var deviceNameText: TextView
+    private lateinit var connectionPanel: LinearLayout
+    private lateinit var connectionDot: View
+    private lateinit var connectionTitle: TextView
+    private lateinit var connectionSubtitle: TextView
+    private lateinit var retryText: TextView
+    private lateinit var scanProgress: View
+    private lateinit var devicesContainer: LinearLayout
+    private lateinit var appendEnterToggle: LinearLayout
+    private lateinit var appendEnterSwitch: Switch
+    private val connectionInfoTypeface by lazy {
+        runCatching {
+            Typeface.createFromAsset(assets, "flutter_assets/assets/fonts/WDXLLubrifontSC-Regular.ttf")
+        }.getOrDefault(Typeface.DEFAULT)
+    }
+    private var scanning = false
+    private var appendEnter = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        Log.d("WTS", "QuickSendActivity onCreate")
+        appendEnter = getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .getBoolean(KEY_APPEND_ENTER, false)
+        buildUi()
+        input.requestFocus()
+        input.post {
+            val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+            imm.showSoftInput(input, InputMethodManager.SHOW_IMPLICIT)
+        }
+    }
+
+    private fun buildUi() {
+        val root = FrameLayout(this)
+        root.setBackgroundColor(0x66000000)
+        root.setOnClickListener { finish() }
+        root.setOnApplyWindowInsetsListener { view, insets ->
+            val imeBottom = insets.getInsets(WindowInsets.Type.ime()).bottom
+            val navBottom = insets.getInsets(WindowInsets.Type.navigationBars()).bottom
+            val keyboardLift = (imeBottom - navBottom).coerceAtLeast(0)
+            view.setPadding(0, 0, 0, keyboardLift)
+            insets
+        }
+        window.setSoftInputMode(
+            WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE or
+                WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE
+        )
+
+        val sheet = LinearLayout(this)
+        sheet.orientation = LinearLayout.VERTICAL
+        sheet.setPadding(dp(20), dp(18), dp(20), dp(18))
+        sheet.setBackgroundColor(Color.WHITE)
+        sheet.setOnClickListener { }
+
+        val topRow = LinearLayout(this)
+        topRow.gravity = Gravity.CENTER_VERTICAL
+        topRow.orientation = LinearLayout.HORIZONTAL
+        sheet.addView(topRow, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ))
+
+        val connectionSummary = LinearLayout(this)
+        connectionSummary.gravity = Gravity.CENTER_VERTICAL
+        connectionSummary.orientation = LinearLayout.HORIZONTAL
+        topRow.addView(connectionSummary, LinearLayout.LayoutParams(
+            0,
+            dp(64),
+            1f
+        ))
+
+        connectionIcon = ImageView(this)
+        connectionSummary.addView(connectionIcon, LinearLayout.LayoutParams(dp(40), dp(40)))
+
+        val summaryCopy = LinearLayout(this)
+        summaryCopy.orientation = LinearLayout.VERTICAL
+        summaryCopy.gravity = Gravity.CENTER_VERTICAL
+        connectionSummary.addView(summaryCopy, LinearLayout.LayoutParams(
+            0,
+            dp(64),
+            1f
+        ).apply {
+            leftMargin = dp(10)
+        })
+
+        endpointText = TextView(this)
+        endpointText.textSize = 21f
+        endpointText.typeface = Typeface.create(connectionInfoTypeface, Typeface.BOLD)
+        endpointText.setTextColor(Color.rgb(15, 23, 42))
+        endpointText.includeFontPadding = false
+        endpointText.maxLines = 1
+        summaryCopy.addView(endpointText)
+
+        deviceNameText = TextView(this)
+        deviceNameText.textSize = 18f
+        deviceNameText.typeface = connectionInfoTypeface
+        deviceNameText.setTextColor(Color.rgb(100, 116, 139))
+        deviceNameText.includeFontPadding = false
+        deviceNameText.maxLines = 1
+        summaryCopy.addView(deviceNameText, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            topMargin = dp(2)
+        })
+
+        appendEnterToggle = LinearLayout(this)
+        appendEnterToggle.gravity = Gravity.CENTER_VERTICAL
+        appendEnterToggle.orientation = LinearLayout.HORIZONTAL
+        appendEnterToggle.setPadding(dp(10), 0, dp(4), 0)
+        appendEnterToggle.background = strokeDrawable(Color.WHITE, Color.rgb(226, 232, 240), dp(8).toFloat())
+        appendEnterToggle.isClickable = true
+        appendEnterToggle.isFocusable = true
+        appendEnterToggle.setOnClickListener { toggleAppendEnter() }
+
+        val appendEnterLabel = TextView(this)
+        appendEnterLabel.text = "追加回车"
+        appendEnterLabel.textSize = 13f
+        appendEnterLabel.typeface = Typeface.DEFAULT_BOLD
+        appendEnterLabel.setTextColor(Color.rgb(15, 23, 42))
+        appendEnterToggle.addView(appendEnterLabel, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.WRAP_CONTENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ))
+
+        appendEnterSwitch = Switch(this)
+        appendEnterSwitch.isChecked = appendEnter
+        appendEnterSwitch.setOnCheckedChangeListener { _, isChecked -> setAppendEnter(isChecked) }
+        appendEnterToggle.addView(appendEnterSwitch)
+        topRow.addView(appendEnterToggle, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.WRAP_CONTENT,
+            dp(44)
+        ).apply {
+            leftMargin = dp(10)
+        })
+
+        connectionPanel = LinearLayout(this)
+        connectionPanel.orientation = LinearLayout.VERTICAL
+        connectionPanel.setPadding(dp(14), dp(12), dp(14), dp(12))
+        connectionPanel.background = strokeDrawable(Color.rgb(248, 250, 252), Color.rgb(226, 232, 240), dp(12).toFloat())
+        sheet.addView(connectionPanel, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            topMargin = dp(10)
+        })
+
+        val connectionHeader = LinearLayout(this)
+        connectionHeader.gravity = Gravity.CENTER_VERTICAL
+        connectionHeader.orientation = LinearLayout.HORIZONTAL
+        connectionPanel.addView(connectionHeader, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ))
+
+        connectionDot = View(this)
+        connectionHeader.addView(connectionDot, LinearLayout.LayoutParams(dp(10), dp(10)))
+
+        val connectionCopy = LinearLayout(this)
+        connectionCopy.orientation = LinearLayout.VERTICAL
+        connectionHeader.addView(connectionCopy, LinearLayout.LayoutParams(
+            0,
+            LinearLayout.LayoutParams.WRAP_CONTENT,
+            1f
+        ).apply {
+            leftMargin = dp(10)
+        })
+
+        connectionTitle = TextView(this)
+        connectionTitle.textSize = 14f
+        connectionTitle.typeface = Typeface.DEFAULT_BOLD
+        connectionTitle.setTextColor(Color.rgb(15, 23, 42))
+        connectionCopy.addView(connectionTitle)
+
+        connectionSubtitle = TextView(this)
+        connectionSubtitle.textSize = 12f
+        connectionSubtitle.setTextColor(Color.rgb(100, 116, 139))
+        connectionCopy.addView(connectionSubtitle, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            topMargin = dp(2)
+        })
+
+        retryText = TextView(this)
+        retryText.text = "重试"
+        retryText.textSize = 13f
+        retryText.typeface = Typeface.DEFAULT_BOLD
+        retryText.setTextColor(Color.rgb(37, 99, 235))
+        retryText.setPadding(dp(10), dp(6), dp(10), dp(6))
+        retryText.isClickable = true
+        retryText.isFocusable = true
+        retryText.setOnClickListener { scanAndConnect() }
+        connectionHeader.addView(retryText)
+
+        scanProgress = View(this)
+        scanProgress.background = roundedDrawable(Color.rgb(37, 99, 235), dp(2).toFloat())
+        connectionPanel.addView(scanProgress, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            dp(3)
+        ).apply {
+            topMargin = dp(10)
+        })
+
+        devicesContainer = LinearLayout(this)
+        devicesContainer.orientation = LinearLayout.VERTICAL
+        connectionPanel.addView(devicesContainer, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            topMargin = dp(10)
+        })
+
+        input = EditText(this)
+        input.minLines = 3
+        input.maxLines = 6
+        input.hint = "输入要发送到电脑的文本"
+        input.textSize = 16f
+        input.setPadding(dp(14), dp(12), dp(14), dp(12))
+        input.background = strokeDrawable(Color.WHITE, Color.rgb(226, 232, 240), dp(12).toFloat())
+        sheet.addView(input, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            topMargin = dp(12)
+        })
+
+        sendButton = LinearLayout(this)
+        sendButton.gravity = Gravity.CENTER
+        sendButton.orientation = LinearLayout.HORIZONTAL
+        sendButton.setPadding(dp(16), 0, dp(16), 0)
+        sendButton.background = roundedDrawable(Color.rgb(37, 99, 235), dp(26).toFloat())
+        sendButton.isClickable = true
+        sendButton.isFocusable = true
+        sendButton.setOnClickListener { sendAndClose() }
+        sendIcon = ImageView(this)
+        sendIcon.setImageResource(R.drawable.ic_send_24)
+        sendIcon.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_IN)
+        sendLabel = TextView(this)
+        sendLabel.text = "发送到电脑"
+        sendLabel.textSize = 16f
+        sendLabel.typeface = Typeface.DEFAULT_BOLD
+        sendLabel.setTextColor(Color.WHITE)
+        sendButton.addView(sendIcon, LinearLayout.LayoutParams(dp(20), dp(20)))
+        sendButton.addView(sendLabel, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.WRAP_CONTENT,
+            LinearLayout.LayoutParams.WRAP_CONTENT
+        ).apply {
+            leftMargin = dp(8)
+        })
+        sheet.addView(sendButton, LinearLayout.LayoutParams(
+            LinearLayout.LayoutParams.MATCH_PARENT,
+            dp(52)
+        ).apply {
+            topMargin = dp(12)
+        })
+
+        val params = FrameLayout.LayoutParams(
+            FrameLayout.LayoutParams.MATCH_PARENT,
+            FrameLayout.LayoutParams.WRAP_CONTENT,
+            Gravity.BOTTOM
+        )
+        root.addView(sheet, params)
+        setContentView(root)
+        refreshState()
+        autoScanIfDisconnected()
+    }
+
+    private fun refreshState() {
+        val state = ConnectionService.stateMap()
+        val connected = state["connected"] as? Boolean ?: false
+        val connecting = state["connecting"] as? Boolean ?: false
+        val host = state["host"] as? String ?: ""
+        val port = state["port"] as? Int ?: 8181
+        val name = state["name"] as? String ?: ""
+        val lastError = state["lastError"] as? String
+        updateConnectionSummary(connected, connecting, host, port, name)
+        connectionPanel.visibility = if (connected) View.GONE else View.VISIBLE
+        connectionDot.background = roundedDrawable(when {
+            connecting || scanning -> Color.rgb(37, 99, 235)
+            else -> Color.rgb(185, 28, 28)
+        }, dp(5).toFloat())
+        scanProgress.visibility = if (scanning || connecting) View.VISIBLE else View.GONE
+        retryText.visibility = if (!connecting && !scanning) View.VISIBLE else View.GONE
+        when {
+            connecting -> {
+                connectionTitle.text = "正在连接电脑"
+                connectionSubtitle.text = "$host:$port"
+            }
+            scanning -> {
+                connectionTitle.text = "正在寻找附近的电脑"
+                connectionSubtitle.text = "发现一个会自动连接，多个会显示选择"
+            }
+            else -> {
+                connectionTitle.text = lastError ?: "暂未连接电脑"
+                connectionSubtitle.text = "将自动扫描局域网内的桌面端服务"
+            }
+        }
+        devicesContainer.visibility = if (connected) View.GONE else devicesContainer.visibility
+        sendButton.isEnabled = connected
+        sendButton.alpha = if (connected) 1f else 0.48f
+    }
+
+    private fun updateConnectionSummary(
+        connected: Boolean,
+        connecting: Boolean,
+        host: String,
+        port: Int,
+        name: String
+    ) {
+        val iconColor = when {
+            connected -> Color.rgb(22, 163, 74)
+            connecting -> Color.rgb(37, 99, 235)
+            else -> Color.rgb(185, 28, 28)
+        }
+        connectionIcon.setImageResource(when {
+            connected || connecting -> R.drawable.ic_sync_24
+            else -> R.drawable.ic_sync_disabled_24
+        })
+        connectionIcon.setColorFilter(iconColor, PorterDuff.Mode.SRC_IN)
+        endpointText.setTextColor(if (connected) Color.rgb(22, 101, 52) else Color.rgb(15, 23, 42))
+        deviceNameText.setTextColor(if (connected) Color.rgb(21, 128, 61) else Color.rgb(100, 116, 139))
+        endpointText.text = if (host.isBlank()) "未设置地址" else "$host:$port"
+        deviceNameText.text = name.ifBlank { "Windows 桌面端" }
+    }
+
+    private fun scanAndConnect() {
+        if (scanning) {
+            return
+        }
+
+        scanning = true
+        updateConnectionSummary(connected = false, connecting = true, host = "", port = 8181, name = "")
+        connectionTitle.text = "正在寻找附近的电脑"
+        connectionSubtitle.text = "发现一个会自动连接，多个会显示选择"
+        connectionDot.background = roundedDrawable(Color.rgb(37, 99, 235), dp(5).toFloat())
+        retryText.visibility = View.GONE
+        scanProgress.visibility = View.VISIBLE
+        devicesContainer.removeAllViews()
+        devicesContainer.visibility = View.GONE
+
+        Thread {
+            val devices = DiscoveryClient.discover(applicationContext)
+            runOnUiThread {
+                scanning = false
+                when (devices.size) {
+                    0 -> {
+                        updateConnectionSummary(connected = false, connecting = false, host = "", port = 8181, name = "")
+                        connectionTitle.text = "没有发现桌面端"
+                        connectionSubtitle.text = "确认电脑和手机在同一局域网后重试"
+                        connectionDot.background = roundedDrawable(Color.rgb(185, 28, 28), dp(5).toFloat())
+                        retryText.visibility = View.VISIBLE
+                        scanProgress.visibility = View.GONE
+                    }
+                    1 -> connectTo(devices.single())
+                    else -> showDeviceChoices(devices)
+                }
+            }
+        }.start()
+    }
+
+    private fun autoScanIfDisconnected() {
+        val state = ConnectionService.stateMap()
+        val connected = state["connected"] as? Boolean ?: false
+        val connecting = state["connecting"] as? Boolean ?: false
+        if (!connected && !connecting) {
+            scanAndConnect()
+        }
+    }
+
+    private fun showDeviceChoices(devices: List<DiscoveredService>) {
+        updateConnectionSummary(connected = false, connecting = true, host = "", port = 8181, name = "")
+        connectionTitle.text = "选择要连接的电脑"
+        connectionSubtitle.text = "发现 ${devices.size} 个桌面端服务"
+        connectionDot.background = roundedDrawable(Color.rgb(37, 99, 235), dp(5).toFloat())
+        retryText.visibility = View.VISIBLE
+        scanProgress.visibility = View.GONE
+        devicesContainer.removeAllViews()
+        devicesContainer.visibility = View.VISIBLE
+
+        devices.forEach { device ->
+            devicesContainer.addView(createDeviceChoice(device), LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT
+            ).apply {
+                bottomMargin = dp(8)
+            })
+        }
+    }
+
+    private fun createDeviceChoice(device: DiscoveredService): TextView {
+        return TextView(this).apply {
+            text = "${device.name}\n${device.host}:${device.port}"
+            textSize = 14f
+            setTextColor(Color.rgb(15, 23, 42))
+            setPadding(dp(12), dp(10), dp(12), dp(10))
+            background = strokeDrawable(Color.WHITE, Color.rgb(203, 213, 225), dp(10).toFloat())
+            isClickable = true
+            isFocusable = true
+            setOnClickListener { connectTo(device) }
+        }
+    }
+
+    private fun connectTo(device: DiscoveredService) {
+        updateConnectionSummary(
+            connected = false,
+            connecting = true,
+            host = device.host,
+            port = device.port,
+            name = device.name
+        )
+        connectionTitle.text = "正在连接电脑"
+        connectionSubtitle.text = "${device.host}:${device.port}"
+        connectionDot.background = roundedDrawable(Color.rgb(37, 99, 235), dp(5).toFloat())
+        retryText.visibility = View.GONE
+        scanProgress.visibility = View.VISIBLE
+        devicesContainer.removeAllViews()
+        devicesContainer.visibility = View.GONE
+        ConnectionService.connect(this, device.host, device.port, device.name)
+        Handler(Looper.getMainLooper()).postDelayed({ refreshState() }, 700)
+        Handler(Looper.getMainLooper()).postDelayed({ refreshState() }, 1800)
+    }
+
+    private fun sendAndClose() {
+        val text = input.text.toString()
+        Log.d("WTS", "QuickSendActivity send length=${text.length}")
+        if (text.isBlank()) {
+            return
+        }
+
+        if (ConnectionService.sendText(text) && (!appendEnter || ConnectionService.sendEnter())) {
+            saveHistory(text)
+            sendButton.background = roundedDrawable(Color.rgb(22, 163, 74), dp(26).toFloat())
+            sendIcon.setImageResource(R.drawable.ic_check_24)
+            sendIcon.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_IN)
+            sendLabel.text = "发送成功"
+            Handler(Looper.getMainLooper()).postDelayed({
+                hideKeyboard()
+                finish()
+            }, 520)
+        } else {
+            refreshState()
+        }
+    }
+
+    private fun saveHistory(text: String) {
+        if (text.trim().isEmpty()) {
+            return
+        }
+
+        val prefs = getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+        val currentHistory = readHistory()
+        val nextHistory = linkedSetOf(text)
+        currentHistory
+            .filter { it != text }
+            .take(MAX_HISTORY_ITEMS - 1)
+            .forEach { nextHistory.add(it) }
+
+        prefs.edit()
+            .putString(KEY_HISTORY, JSON_LIST_PREFIX + JSONArray(nextHistory.toList()).toString())
+            .apply()
+    }
+
+    private fun readHistory(): List<String> {
+        val rawValue = getSharedPreferences(PREFS, Context.MODE_PRIVATE).all[KEY_HISTORY]
+        return when (rawValue) {
+            is String -> decodeHistoryString(rawValue)
+            is Set<*> -> rawValue.filterIsInstance<String>()
+            else -> emptyList()
+        }
+    }
+
+    private fun decodeHistoryString(value: String): List<String> {
+        if (!value.startsWith(JSON_LIST_PREFIX)) {
+            return emptyList()
+        }
+
+        return runCatching {
+            val array = JSONArray(value.substring(JSON_LIST_PREFIX.length))
+            List(array.length()) { index -> array.optString(index) }
+                .filter { it.isNotEmpty() }
+        }.getOrDefault(emptyList())
+    }
+
+    private fun toggleAppendEnter() {
+        setAppendEnter(!appendEnter)
+    }
+
+    private fun setAppendEnter(value: Boolean) {
+        if (appendEnter == value && appendEnterSwitch.isChecked == value) {
+            return
+        }
+
+        appendEnter = value
+        getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+            .edit()
+            .putBoolean(KEY_APPEND_ENTER, appendEnter)
+            .apply()
+        updateAppendEnterToggle()
+    }
+
+    private fun updateAppendEnterToggle() {
+        if (appendEnterSwitch.isChecked != appendEnter) {
+            appendEnterSwitch.isChecked = appendEnter
+        }
+        appendEnterToggle.background = strokeDrawable(
+            Color.WHITE,
+            if (appendEnter) Color.rgb(147, 197, 253) else Color.rgb(226, 232, 240),
+            dp(16).toFloat()
+        )
+    }
+
+    private fun hideKeyboard() {
+        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+        imm.hideSoftInputFromWindow(input.windowToken, 0)
+    }
+
+    private fun roundedDrawable(color: Int, radius: Float): GradientDrawable {
+        return GradientDrawable().apply {
+            shape = GradientDrawable.RECTANGLE
+            setColor(color)
+            cornerRadius = radius
+        }
+    }
+
+    private fun strokeDrawable(fill: Int, stroke: Int, radius: Float): GradientDrawable {
+        return GradientDrawable().apply {
+            shape = GradientDrawable.RECTANGLE
+            setColor(fill)
+            setStroke(dp(1), stroke)
+            cornerRadius = radius
+        }
+    }
+
+    private fun dp(value: Int): Int {
+        return (value * resources.displayMetrics.density).toInt()
+    }
+
+    companion object {
+        private const val PREFS = "FlutterSharedPreferences"
+        private const val KEY_APPEND_ENTER = "flutter.append_enter"
+        private const val KEY_HISTORY = "flutter.send_history"
+        private const val JSON_LIST_PREFIX = "VGhpcyBpcyB0aGUgcHJlZml4IGZvciBhIGxpc3Qu!"
+        private const val MAX_HISTORY_ITEMS = 10
+    }
+}

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/QuickSendTileService.kt

@@ -0,0 +1,62 @@
+package com.wirelesstextsyncer.wireless_text_syncer_android
+
+import android.app.PendingIntent
+import android.content.ComponentName
+import android.content.Intent
+import android.os.Build
+import android.service.quicksettings.Tile
+import android.service.quicksettings.TileService
+import android.util.Log
+
+class QuickSendTileService : TileService() {
+    override fun onStartListening() {
+        super.onStartListening()
+        Log.d("WTS", "QuickSendTileService onStartListening")
+        refreshTile()
+    }
+
+    override fun onClick() {
+        super.onClick()
+        Log.d("WTS", "QuickSendTileService onClick")
+        val intent = Intent(this, QuickSendActivity::class.java)
+            .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+            val pendingIntent = PendingIntent.getActivity(
+                this,
+                0,
+                intent,
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+            )
+            startActivityAndCollapse(pendingIntent)
+        } else {
+            @Suppress("DEPRECATION")
+            startActivityAndCollapse(intent)
+        }
+    }
+
+    private fun refreshTile() {
+        val tile = qsTile ?: return
+        val state = ConnectionService.stateMap()
+        val connected = state["connected"] as? Boolean ?: false
+        tile.label = "文本同步"
+        tile.subtitle = if (connected) "已连接" else "未连接"
+        tile.state = if (connected) Tile.STATE_ACTIVE else Tile.STATE_INACTIVE
+        tile.updateTile()
+    }
+
+    companion object {
+        fun requestTileRefresh() {
+            Log.d("WTS", "QuickSendTileService requestTileRefresh")
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                try {
+                    requestListeningState(
+                        WirelessTextSyncerApplicationHolder.context,
+                        ComponentName(WirelessTextSyncerApplicationHolder.context, QuickSendTileService::class.java)
+                    )
+                } catch (exception: Exception) {
+                    Log.e("WTS", "requestListeningState failed", exception)
+                }
+            }
+        }
+    }
+}

android/app/src/main/kotlin/com/wirelesstextsyncer/wireless_text_syncer_android/WirelessTextSyncerApplicationHolder.kt

@@ -0,0 +1,17 @@
+package com.wirelesstextsyncer.wireless_text_syncer_android
+
+import android.app.Application
+import android.content.Context
+import android.util.Log
+
+class WirelessTextSyncerApplicationHolder : Application() {
+    override fun onCreate() {
+        super.onCreate()
+        Log.d("WTS", "Application onCreate")
+        context = applicationContext
+    }
+
+    companion object {
+        lateinit var context: Context
+    }
+}

android/app/src/main/res/drawable/ic_check_24.xml

@@ -0,0 +1,9 @@
+<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="M9,16.2L4.8,12L3.4,13.4L9,19L21,7L19.6,5.6L9,16.2Z" />
+</vector>

android/app/src/main/res/drawable/ic_send_24.xml

@@ -0,0 +1,9 @@
+<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="M2,21L23,12L2,3V10L17,12L2,14V21Z" />
+</vector>

android/app/src/main/res/drawable/ic_sync_24.xml

@@ -0,0 +1,9 @@
+<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="M12,4V1L8,5L12,9V6C15.31,6 18,8.69 18,12C18,13.01 17.75,13.96 17.3,14.8L18.76,16.26C19.54,15.03 20,13.57 20,12C20,7.58 16.42,4 12,4ZM6,12C6,10.99 6.25,10.04 6.7,9.2L5.24,7.74C4.46,8.97 4,10.43 4,12C4,16.42 7.58,20 12,20V23L16,19L12,15V18C8.69,18 6,15.31 6,12Z" />
+</vector>

android/app/src/main/res/drawable/ic_sync_disabled_24.xml

@@ -0,0 +1,9 @@
+<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="M10.86,5.14L8,8L10.86,10.86V8.42C12.58,8.83 14.02,9.96 14.83,11.48L16.31,10C15.15,8.15 13.2,6.84 10.86,6.41V5.14ZM2.81,2L1.39,3.41L5.38,7.4C4.51,8.7 4,10.29 4,12C4,16.42 7.58,20 12,20V23L16,19L12,15V18C8.69,18 6,15.31 6,12C6,10.84 6.33,9.76 6.9,8.85L19.59,21.54L21,20.13L2.81,2ZM18.62,16.6C19.49,15.3 20,13.71 20,12C20,7.58 16.42,4 12,4V1L9.38,3.62L11.1,5.34C11.4,5.13 11.69,4.91 12,4.75V6C15.31,6 18,8.69 18,12C18,13.16 17.67,14.24 17.1,15.15L18.62,16.6Z" />
+</vector>

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

@@ -15,4 +15,11 @@
     <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+    <style name="TransparentBottomSheetTheme" parent="@android:style/Theme.Material.NoActionBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+        <item name="android:colorAccent">#60A5FA</item>
+    </style>
 </resources>

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

@@ -15,4 +15,11 @@
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+    <style name="TransparentBottomSheetTheme" parent="@android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+        <item name="android:colorAccent">#2563EB</item>
+    </style>
 </resources>

assets/fonts/WDXLLubrifontSC-OFL.txt

@@ -0,0 +1,94 @@
+Copyright 2025 The WDXL Lubrifont Project Authors (https://github.com/NightFurySL2001/WD-XL-font)
+Copyright 2018-2020 The ZCOOL QingKe HuangYou Project Authors (https://www.github.com/googlefonts/zcool-qingke-huangyou)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

pubspec.lock

@@ -41,14 +41,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.7"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -317,14 +309,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.10"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.4.0"
   vector_math:
     dependency: transitive
     description:
@@ -349,22 +333,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
-  web_socket:
-    dependency: transitive
-    description:
-      name: web_socket
-      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.1"
-  web_socket_channel:
-    dependency: "direct main"
-    description:
-      name: web_socket_channel
-      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.3"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -34,7 +34,6 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
-  web_socket_channel: ^3.0.3
   shared_preferences: ^2.5.5
 
 dev_dependencies:
@@ -59,6 +58,11 @@ flutter:
   # the material Icons class.
   uses-material-design: true
 
+  fonts:
+    - family: WDXL Lubrifont SC
+      fonts:
+        - asset: assets/fonts/WDXLLubrifontSC-Regular.ttf
+
   # To add assets to your application, add an assets section, like this:
   # assets:
   #   - images/a_dot_burr.jpeg

test/widget_test.dart

@@ -6,20 +6,65 @@
 // tree, read text, and verify that the values of widget properties are correct.
 
 import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/services.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import 'package:wireless_text_syncer_android/main.dart';
 
 void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  const connectionChannel = MethodChannel('wireless_text_syncer/connection');
+  const stateChannel = MethodChannel('wireless_text_syncer/connection_state');
+
+  setUp(() {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(connectionChannel, (call) async {
+          switch (call.method) {
+            case 'getState':
+              return {
+                'connected': false,
+                'connecting': false,
+                'host': '',
+                'port': 8181,
+                'lastError': null,
+              };
+            case 'startDiscovery':
+              return [
+                {'name': 'Desktop-WIN11', 'host': '192.168.1.10', 'port': 8181},
+              ];
+            case 'connect':
+            case 'disconnect':
+              return null;
+            case 'sendText':
+              return true;
+          }
+          return null;
+        });
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(stateChannel, (call) async => null);
+  });
+
+  tearDown(() {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(connectionChannel, null);
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(stateChannel, null);
+  });
+
   testWidgets('shows v2 draft board controls', (WidgetTester tester) async {
     SharedPreferences.setMockInitialValues({});
 
     await tester.pumpWidget(const WirelessTextSyncerApp());
     await tester.pump(const Duration(milliseconds: 100));
+    await tester.pump(const Duration(seconds: 2));
 
     expect(find.text('未连接 (点击配置)'), findsOneWidget);
     expect(find.text('IP 地址'), findsOneWidget);
     expect(find.text('端口'), findsOneWidget);
+    expect(find.text('局域网设备雷达'), findsOneWidget);
+    expect(find.text('Desktop-WIN11'), findsOneWidget);
+    expect(find.text('可连接'), findsOneWidget);
     expect(find.text('草稿板'), findsOneWidget);
     expect(find.text('发送后清空'), findsOneWidget);
     expect(find.text('追加回车'), findsOneWidget);