325 lines
10 KiB
C#
325 lines
10 KiB
C#
using System.Diagnostics;
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using HeartRateMonitorAndroid.Models;
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using HeartRateMonitorAndroid.Services;
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using HeartRateMonitorAndroid.UI;
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namespace HeartRateMonitorAndroid;
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public partial class MainPage : ContentPage
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{
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private const string Tag = "HeartRateMonitor";
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private const int GraphUpdateIntervalMs = 1000; // 每秒更新一次图表
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private const string DefaultWebsocketUrl = "wss://ws.nuanr-mxi.com/ws"; // 默认WebSocket服务器地址
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// 图表更新定时器
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private IDispatcherTimer _graphUpdateTimer;
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// WebSocket相关
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private WebSocketService.HeartRateWebSocketClient _webSocketClient;
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private bool _isWebSocketEnabled = false;
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private string _webSocketUrl = DefaultWebsocketUrl;
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// 后台模式标志
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private bool _isRunningInBackground = false;
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// 服务
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private readonly BluetoothService _bluetoothService;
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// 心率数据模型
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private readonly HeartRateSessionData _sessionData = new();
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private readonly HeartRateGraphDrawable _heartRateGraph = new();
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public MainPage()
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{
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InitializeComponent();
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// 初始化蓝牙服务
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_bluetoothService = new BluetoothService();
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_bluetoothService.StatusUpdated += UpdateStatus;
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_bluetoothService.HeartRateUpdated += UpdateHeartRate;
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_bluetoothService.DeviceDiscovered += OnHeartRateDeviceDiscovered;
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// 初始化图表
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heartRateGraphicsView.Drawable = _heartRateGraph;
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// 初始化图表更新定时器
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InitializeGraphUpdateTimer();
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// 检查蓝牙状态
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_bluetoothService.CheckBluetoothState();
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}
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/// <summary>
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/// 初始化图表更新定时器
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/// </summary>
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private void InitializeGraphUpdateTimer()
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{
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_graphUpdateTimer = Dispatcher.CreateTimer();
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_graphUpdateTimer.Interval = TimeSpan.FromMilliseconds(GraphUpdateIntervalMs);
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_graphUpdateTimer.Tick += async (s, e) => await UpdateGraph();
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_graphUpdateTimer.Start();
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}
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/// <summary>
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/// 更新图表和通知
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/// </summary>
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private async Task UpdateGraph()
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{
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// 发送心率数据到服务器
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await SendHeartRateToServerAsync(_sessionData.LatestHeartRate);
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// 更新图表
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_heartRateGraph.UpdateData(_sessionData.HeartRateData);
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heartRateGraphicsView.Invalidate();
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// 重置新数据标记
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_sessionData.ResetNewDataFlag();
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// 如果在后台运行且有数据，更新通知
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if (_isRunningInBackground && _sessionData.HeartRateData.Count > 0)
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{
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var duration = _sessionData.GetSessionDuration();
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NotificationService.ShowHeartRateNotification(
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_sessionData.LatestHeartRate,
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_sessionData.AverageHeartRate,
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_sessionData.MinHeartRate,
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_sessionData.MaxHeartRate,
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duration);
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}
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}
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/// <summary>
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/// 更新状态标签
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/// </summary>
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private void UpdateStatus(string status)
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{
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MainThread.BeginInvokeOnMainThread(() => {
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statusLabel.Text = status;
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});
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}
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/// <summary>
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/// 更新心率数据
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/// </summary>
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private void UpdateHeartRate(int heartRate)
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{
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MainThread.BeginInvokeOnMainThread(() => {
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// 更新UI上的心率显示
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heartRateLabel.Text = $"心率: {heartRate} BPM";
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// 添加新的心率数据点
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_sessionData.AddHeartRate(heartRate);
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// 如果是第一个数据点，隐藏提示标签
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if (_sessionData.HeartRateData.Count == 1)
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{
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noDataLabel.IsVisible = false;
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}
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// 更新统计信息显示
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minHeartRateLabel.Text = _sessionData.MinHeartRate.ToString();
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maxHeartRateLabel.Text = _sessionData.MaxHeartRate.ToString();
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avgHeartRateLabel.Text = _sessionData.AverageHeartRate.ToString("0");
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});
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}
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/// <summary>
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/// 扫描按钮点击事件
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/// </summary>
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private async void OnScanClicked(object sender, EventArgs e)
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{
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await _bluetoothService.StartScanAsync();
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}
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/// <summary>
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/// 心率设备发现事件处理
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/// </summary>
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private async void OnHeartRateDeviceDiscovered(Plugin.BLE.Abstractions.Contracts.IDevice device)
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{
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await MainThread.InvokeOnMainThreadAsync(async () => {
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statusLabel.Text = $"检测到心率设备: {device.Name ?? "未知设备"}";
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await _bluetoothService.ConnectToDeviceAsync(device);
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// 连接成功后重置心率数据显示
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if (_bluetoothService.ConnectedDevice != null)
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{
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_sessionData.ResetData();
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minHeartRateLabel.Text = "--";
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maxHeartRateLabel.Text = "--";
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avgHeartRateLabel.Text = "--";
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noDataLabel.IsVisible = true;
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heartRateGraphicsView.Invalidate();
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}
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});
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}
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/// <summary>
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/// 后台运行按钮点击事件
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/// </summary>
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private async void OnBackgroundClicked(object sender, EventArgs e)
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{
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if (_bluetoothService.ConnectedDevice == null)
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{
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await DisplayAlert("提示", "请先连接心率设备", "确定");
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return;
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}
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_isRunningInBackground = !_isRunningInBackground;
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if (_isRunningInBackground)
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{
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backgroundButton.Text = "停止后台运行";
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// 显示通知
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if (_sessionData.HeartRateData.Count > 0)
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{
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TimeSpan duration = _sessionData.GetSessionDuration();
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NotificationService.ShowHeartRateNotification(
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_sessionData.LatestHeartRate,
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_sessionData.AverageHeartRate,
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_sessionData.MinHeartRate,
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_sessionData.MaxHeartRate,
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duration);
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}
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else
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{
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NotificationService.ShowHeartRateNotification(0, 0, 0, 0, TimeSpan.Zero);
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}
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// 通知用户应用将在后台运行
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await DisplayAlert("后台运行", "应用将在后台继续监测心率。可以通过通知栏查看实时数据。", "确定");
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}
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else
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{
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backgroundButton.Text = "后台运行";
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// 取消通知
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Services.NotificationService.CancelNotification();
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}
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}
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/// <summary>
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/// WebSocket设置按钮点击事件
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/// </summary>
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private async void OnWebSocketSettingsClicked(object sender, EventArgs e)
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{
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string result = await DisplayPromptAsync(
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"配置数据上传",
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"请输入WebSocket服务器地址：\n格式：wss://example.com/ws",
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"确定",
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"取消",
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_webSocketUrl,
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maxLength: 100,
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keyboard: Keyboard.Url);
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if (string.IsNullOrWhiteSpace(result)) return;
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if (!result.StartsWith("ws://") && !result.StartsWith("wss://"))
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{
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// fallback到默认websocket服务器
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result = _webSocketUrl;
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}
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try
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{
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// 更新按钮状态，显示正在连接
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webSocketButton.Text = "正在连接...";
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webSocketButton.IsEnabled = false;
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// 初始化WebSocket客户端
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await InitializeWebSocketClientAsync(result);
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if (_isWebSocketEnabled)
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{
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webSocketButton.Text = "数据上传已启用";
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webSocketButton.BackgroundColor = Color.FromArgb("#28A745"); // 绿色
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await DisplayAlert("连接成功", "心率数据将会实时上传到服务器", "确定");
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// 禁用按钮
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webSocketButton.IsEnabled = false;
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}
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else
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{
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webSocketButton.Text = "配置数据上传";
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webSocketButton.BackgroundColor = Color.FromArgb("#6C757D"); // 灰色
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await DisplayAlert("连接失败", "无法连接到指定的WebSocket服务器，请检查地址或网络连接", "确定");
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}
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}
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catch (Exception ex)
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{
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webSocketButton.Text = "配置数据上传";
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webSocketButton.BackgroundColor = Color.FromArgb("#6C757D"); // 灰色
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await DisplayAlert("错误", $"配置WebSocket时出错: {ex.Message}", "确定");
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}
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finally
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{
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webSocketButton.IsEnabled = true;
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}
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}
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/// <summary>
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/// 初始化WebSocket客户端
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/// </summary>
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private async Task InitializeWebSocketClientAsync(string url = null)
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{
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// 释放现有的WebSocket客户端
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if (_webSocketClient != null)
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{
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_webSocketClient.Dispose();
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_webSocketClient = null;
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}
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// 使用提供的URL或默认URL
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_webSocketUrl = string.IsNullOrEmpty(url) ? DefaultWebsocketUrl : url;
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try
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{
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_webSocketClient = new Services.WebSocketService.HeartRateWebSocketClient(_webSocketUrl);
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await _webSocketClient.ConnectAsync();
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_isWebSocketEnabled = true;
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Debug.WriteLine($"{Tag}: WebSocket客户端已初始化，连接到 {_webSocketUrl}");
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}
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catch (Exception ex)
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{
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Debug.WriteLine($"{Tag}: 初始化WebSocket客户端失败: {ex.Message}");
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_isWebSocketEnabled = false;
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}
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}
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/// <summary>
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/// 发送心率数据到WebSocket服务器
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/// </summary>
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private async Task SendHeartRateToServerAsync(int heartRate)
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{
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if (!_isWebSocketEnabled || _webSocketClient == null) return;
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try
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{
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var data = new WebSocketService.HeartRateData
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{
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HeartRate = heartRate,
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Timestamp = DateTime.Now,
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DeviceName = _bluetoothService.ConnectedDevice?.Name ?? "未知设备"
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};
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await _webSocketClient.SendHeartRateDataAsync(data);
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}
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catch (Exception ex)
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{
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Debug.WriteLine($"发送心率数据失败: {ex.Message}");
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}
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}
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/// <summary>
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/// 页面卸载时清理资源
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/// </summary>
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~MainPage()
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{
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if (_webSocketClient != null)
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{
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_webSocketClient.Dispose();
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_webSocketClient = null;
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}
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_bluetoothService.Dispose();
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}
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} |