Xamarin能否获取设备硬件底层诊断信息？

Great question! Let's walk through how you can build this low-level hardware diagnostic app with Xamarin for both iOS and Android—since you already know about James Montemagno's DeviceInfoPlugin for basic device details (manufacturer, model, etc.), we'll focus on the deeper hardware checks you're after (beyond just on/off status):

iOS requires using Apple's native frameworks to access low-level hardware data. Here's how to tackle each component:

• Bluetooth Diagnostics: Use the CoreBluetooth framework to pull details like:
  • Local Bluetooth adapter firmware version, MAC address, and supported profiles
  • RSSI (signal strength) of connected/scanned BLE devices
  • Broadcast data and service characteristics from nearby peripherals
    Example snippet to get RSSI of a scanned device:

  var centralManager = new CBCentralManager();
  centralManager.ScanForPeripherals(null);
  centralManager.DiscoveredPeripheral += (sender, e) =>
  {
      var rssi = e.RSSI; // Signal strength value
      var peripheralDetails = new { e.Peripheral.Name, e.Peripheral.Identifier, RSSI = rssi };
  };
  

• WiFi Diagnostics: Leverage CNCopyCurrentNetworkInfo and NWPathMonitor (iOS 12+) to get:
  • Current WiFi network's SSID, BSSID, signal strength, and link speed
  • Network path quality metrics like latency and packet loss
    Note: You'll need to enable the Access WiFi Information entitlement and request location permissions (iOS ties WiFi data to location privacy rules).
• Battery Diagnostics: For deeper battery data beyond basic level/state:
  • Use IOKit framework to pull cycle count, design capacity, current maximum capacity, and battery health
  • Example: Bind native IOServiceGetMatchingService methods to access these low-level battery stats (ensure you're using public APIs to avoid App Store rejection)

Android provides more direct access to hardware APIs via its SDK. Here's the breakdown:

• Bluetooth Diagnostics: Use BluetoothManager and BluetoothLeScanner (Android 12+) to retrieve:
  • Local adapter's MAC address, firmware version, and supported features
  • RSSI of connected devices and detailed scan results for BLE peripherals
  • Connection status codes and error details for failed pairings
• WiFi Diagnostics: Use WifiManager and NetworkStatsManager to get:
  • Current WiFi signal strength (getRssi()), link speed, and network metrics
  • Data usage stats (bytes sent/received) and network quality monitoring
    Permissions needed: ACCESS_WIFI_STATE, CHANGE_WIFI_STATE, and (Android 10+) location permissions to access WiFi details.
• Battery Diagnostics: Use BatteryManager via broadcast intents to pull:
  • Battery voltage, temperature, health status (e.g., BATTERY_HEALTH_GOOD), and cycle count (Android 8.0+)
  • Charging state and power source details (USB, wireless, AC)

To keep your code clean and shareable across platforms, create a shared interface for your diagnostic service, then implement it separately for iOS and Android:

// Shared interface
public interface IHardwareDiagnosticsService
{
    Task<BatteryDiagnostics> GetBatteryDetails();
    Task<WiFiDiagnostics> GetWiFiDetails();
    Task<BluetoothDiagnostics> GetBluetoothDetails();
}

// iOS implementation example
public class iOSHardwareDiagnostics : IHardwareDiagnosticsService
{
    public async Task<BatteryDiagnostics> GetBatteryDetails()
    {
        // Implement iOS-specific battery logic here
        return new BatteryDiagnostics
        {
            CycleCount = GetBatteryCycleCount(),
            HealthStatus = GetBatteryHealth(),
            Temperature = UIDevice.CurrentDevice.BatteryTemperature
        };
    }

    // Other method implementations...
}

• Permissions: Both platforms require explicit permissions for hardware access—make sure to declare them in Info.plist (iOS) and AndroidManifest.xml (Android), and request them dynamically at runtime.
• Private APIs: Avoid using Apple/Google's private APIs, as they'll get your app rejected from the App Store/Google Play. Stick to publicly documented frameworks.
• DeviceInfoPlugin Integration: Combine your low-level diagnostic logic with DeviceInfoPlugin to display a complete set of device details (basic + hardware health) in your app.

内容的提问来源于stack exchange，提问作者Gold.strike