feat(asr): 添加网络连接检测和无网络提示功能

- 在ASR助手中添加网络状态监测功能
- 当网络不可用时显示提醒对话框
- 实现实时网络连接状态轮询检查
- 添加网络恢复后的自动关闭对话框逻辑
- 集成系统连接管理器进行网络能力检测
- 在语音唤醒触发时优先检查网络连接状态

app/src/main/java/com/nova/brain/glass/helper/AsrHelper.kt

@@ -2,8 +2,11 @@ package com.nova.brain.glass.helper
 
 import android.R.attr.action
 import android.app.AlertDialog
+import android.content.Context
 import android.graphics.Color
 import android.graphics.drawable.GradientDrawable
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
 import android.os.Handler
 import android.os.Looper
 import android.util.Log
@@ -52,6 +55,17 @@ object AsrHelper : OfflineCmdListener {
 
     private val mainHandler = Handler(Looper.getMainLooper())
     private var listeningDialog: AlertDialog? = null
+    private var noNetworkDialog: AlertDialog? = null
+    private val networkCheckRunnable = object : Runnable {
+        override fun run() {
+            if (isNetworkAvailable()) {
+                dismissNoNetworkDialog()
+                return
+            }
+            showNoNetworkDialog()
+            mainHandler.postDelayed(this, 1000L)
+        }
+    }
 
     // 拼接每次识别会话中的中间结果
     private var currentPartial = ""
@@ -169,6 +183,43 @@ object AsrHelper : OfflineCmdListener {
         }
     }
 
+    private fun showNoNetworkDialog() {
+        mainHandler.post {
+            if (noNetworkDialog?.isShowing == true) return@post
+            val activity = runCatching { AppManager.getInstance().getActivity() }.getOrNull()
+                ?: return@post
+            if (activity.isFinishing || activity.isDestroyed) return@post
+            noNetworkDialog = AlertDialog.Builder(activity)
+                .setTitle("网络异常")
+                .setMessage("当前无网络，请检查网络连接")
+                .setCancelable(false)
+                .create()
+                .also { it.show() }
+        }
+    }
+
+    private fun dismissNoNetworkDialog() {
+        mainHandler.post {
+            noNetworkDialog?.dismiss()
+            noNetworkDialog = null
+        }
+    }
+
+    private fun startNoNetworkMonitor() {
+        mainHandler.removeCallbacks(networkCheckRunnable)
+        networkCheckRunnable.run()
+    }
+
+    private fun isNetworkAvailable(): Boolean {
+        val activity = runCatching { AppManager.getInstance().getActivity() }.getOrNull()
+        val context: Context = activity ?: return false
+        val connectivityManager =
+            context.getSystemService(ConnectivityManager::class.java) ?: return false
+        val network = connectivityManager.activeNetwork ?: return false
+        val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
+        return capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+    }
+
     private fun setupAsrCallbacks(asrClient: AsrClient) {
         asrClient.setListener(object : AsrClient.Listener {
             override fun onOpen() {
@@ -266,6 +317,11 @@ object AsrHelper : OfflineCmdListener {
     override fun onOfflineCmd(cmd: String) {
         if (cmd == WAKE_WORD || cmd == WAKE_WORD1 || cmd == "C大脑") {
             Log.d(TAG, "Wake word triggered")
+            if (!isNetworkAvailable()) {
+                dismissListeningDialog()
+                startNoNetworkMonitor()
+                return
+            }
             showListeningDialog()
             if (isTtsConnected) {
                 tts?.speak(WAKE_RESPONSE)
@@ -278,6 +334,8 @@ object AsrHelper : OfflineCmdListener {
 
     fun close() {
         OfflineCmdServiceHelper.removeOnLineListener(this)
+        mainHandler.removeCallbacks(networkCheckRunnable)
+        dismissNoNetworkDialog()
         if (isMicRunning) {
             runCatching { asr?.stopAsrWithMic() }
             isMicRunning = false