Question

我正在使用MvvmCross并在我的报告工具中使用某些方法来获取MvxTrace。在这种情况下，我使用Raygun。 Raygun让我可以选择在我想要抛出的错误消息中包含其他消息，这就是我认为我必须使用它来实现这一点。基本上我想在代码中做这样的事情：

var client = new RaygunClient();
var tags = new List<string> { "myTag" };
var customData = new Dictionary<int, string>() { {1, "**MVXTrace stuff here**"} };
client.Send(exception, tags, customData);

我该如何勾选它？当我查看Trace设置时，我感到困惑。我假设我需要对我用于注入的DebugTrace文件执行某些操作。现在它看起来像这样：

public class DebugTrace : IMvxTrace
{
    public void Trace(MvxTraceLevel level, string tag, Func<string> message)
    {
        Debug.WriteLine(tag + ":" + level + ":" + message());
    }

    public void Trace(MvxTraceLevel level, string tag, string message)
    {
        Debug.WriteLine(tag + ":" + level + ":" + message);
    }

    public void Trace(MvxTraceLevel level, string tag, string message, params object[] args)
    {
        try
        {
            Debug.WriteLine(string.Format(tag + ":" + level + ":" + message, args));
        }
        catch (FormatException)
        {
            Trace(MvxTraceLevel.Error, tag, "Exception during trace of {0} {1} {2}", level, message);
        }
    }
}

我可以做一些挂钩到IMvxTrace逻辑的内容，将内部异常等附加到我的RaygunClient吗？我很难看到导致特定错误的原因，因为如果我按原样离开，我会得到如下错误：

[MvxException: Failed to construct and initialize ViewModel for type MyProject.Core.ViewModels.SignatureViewModel from locator MvxDefaultViewModelLocator - check MvxTrace for more information]

Cirrious.MvvmCross.ViewModels.MvxViewModelLoader.LoadViewModel(Cirrious.MvvmCross.ViewModels.MvxViewModelRequest request, IMvxBundle savedState, IMvxViewModelLocator viewModelLocator):0

Cirrious.MvvmCross.ViewModels.MvxViewModelLoader.LoadViewModel(Cirrious.MvvmCross.ViewModels.MvxViewModelRequest request, IMvxBundle savedState):0

Cirrious.MvvmCross.Droid.Views.MvxAndroidViewsContainer.ViewModelFromRequest(Cirrious.MvvmCross.ViewModels.MvxViewModelRequest viewModelRequest, IMvxBundle savedState):0

Cirrious.MvvmCross.Droid.Views.MvxAndroidViewsContainer.CreateViewModelFromIntent(Android.Content.Intent intent, IMvxBundle savedState):0

Cirrious.MvvmCross.Droid.Views.MvxAndroidViewsContainer.Load(Android.Content.Intent intent, IMvxBundle savedState, System.Type viewModelTypeHint):0

Cirrious.MvvmCross.Droid.Views.MvxActivityViewExtensions.LoadViewModel(IMvxAndroidView androidView, IMvxBundle savedState):0

Cirrious.MvvmCross.Droid.Views.MvxActivityViewExtensions+<>c__DisplayClass3.<OnViewCreate>b__1():0

Cirrious.MvvmCross.Views.MvxViewExtensionMethods.OnViewCreate(IMvxView view, System.Func`1 viewModelLoader):0

Cirrious.MvvmCross.Droid.Views.MvxActivityViewExtensions.OnViewCreate(IMvxAndroidView androidView, Android.OS.Bundle bundle):0

Cirrious.MvvmCross.Droid.Views.MvxActivityAdapter.EventSourceOnCreateCalled(System.Object sender, Cirrious.CrossCore.Core.MvxValueEventArgs`1 eventArgs):0

(wrapper delegate-invoke) System.EventHandler`1<Cirrious.CrossCore.Core.MvxValueEventArgs`1<Android.OS.Bundle>>:invoke_void__this___object_TEventArgs (object,Cirrious.CrossCore.Core.MvxValueEventArgs`1<Android.OS.Bundle>)

Cirrious.CrossCore.Core.MvxDelegateExtensionMethods.Raise[Bundle](System.EventHandler`1 eventHandler, System.Object sender, Android.OS.Bundle value):0

Cirrious.CrossCore.Droid.Views.MvxEventSourceActivity.OnCreate(Android.OS.Bundle bundle):0

MyProject.Droid.Views.SignatureView.OnCreate(Android.OS.Bundle bundle):0

Android.App.Activity.n_OnCreate_Landroid_os_Bundle_(IntPtr jnienv, IntPtr native__this, IntPtr native_savedInstanceState):0

(wrapper dynamic-method) object:3af7783d-a44d-471c-84a6-662ebfaea4ae (intptr,intptr,intptr)

正如该消息所暗示的那样，如果我能用它来获取MvxTrace以准确追踪为什么初始化此ViewModel失败，那将非常有用。有什么建议吗？

Answer 1

这就是我在Android上的表现。我使用Android.Util.Log类。然后，这会将消息记录到Android设备日志。

public class DebugTrace : IMvxTrace
{
    public void Trace(MvxTraceLevel level, string tag, Func<string> message)
    {
        Trace(level, tag, message());
    }

    public void Trace(MvxTraceLevel level, string tag, string message)
    {
        switch (level)
        {
            case MvxTraceLevel.Diagnostic:
                Log.Debug(tag, message);
                break;
            case MvxTraceLevel.Warning:
                Log.Warn(tag, message);
                break;
            case MvxTraceLevel.Error:
                Log.Error(tag, message);
                break;
            default:
                Log.Info(tag, message);
                break;
        }
    }

    public void Trace(MvxTraceLevel level, string tag, string message, params object[] args)
    {
        try
        {
            Trace(level, tag, string.Format(message, args));
        }
        catch (FormatException)
        {
            Trace(MvxTraceLevel.Error, tag, "Exception during trace of {0} {1}", level, message);
        }
    }
}

然后，您可以使用以下内容获取日志：

public class AndroidLogReader
{
    public string ReadLog(string tag)
    {
        var cmd = "logcat -d";
        if (!string.IsNullOrEmpty(tag)) cmd += " -s " + tag;

        var process = Java.Lang.Runtime.GetRuntime().Exec(cmd);
        using (var sr = new StreamReader(process.InputStream))
        {
            return sr.ReadToEnd();
        }
    }
}

Answer 2

以下是我为此工作所做的工作：

我有一个我用于所有Android活动的BaseView。我使用这个BaseView来连接并记录Unhandled Exceptions，如下所示：

    public abstract class BaseView : MvxActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        AppDomain.CurrentDomain.UnhandledException += HandleUnhandledException;
        AndroidEnvironment.UnhandledExceptionRaiser += HandleAndroidException;
    }

    protected void HandleUnhandledException(object sender, UnhandledExceptionEventArgs args)
    {
        var e = (Exception)args.ExceptionObject;
        Mvx.Trace(MvxTraceLevel.Error, "Exception: {0}", e.ToLongString());
        var logReader = new AndroidLogReader();
        var logMessages = logReader.ReadLog("mvx:E");
        var customData = new Dictionary<string, string> { { "logMessage", logMessages } };
        var session = SessionController.Instance;
        var user = new RaygunIdentifierMessage(session.UserName + " " + session.Company);
        var rayMessage = RaygunMessageBuilder.New
            .SetEnvironmentDetails()
            .SetMachineName(Environment.MachineName)
            .SetClientDetails()
            .SetExceptionDetails(e)
            .SetUser(user)
            .SetUserCustomData(customData)
            .Build();
        RaygunClient.Current.Send(rayMessage);
    }

    protected void HandleAndroidException(object sender, RaiseThrowableEventArgs e)
    {
        var exception = e.Exception;
        Mvx.Trace(MvxTraceLevel.Error, "Exception: {0}", e.Exception.ToLongString());
        var logReader = new AndroidLogReader();
        var logMessages = logReader.ReadLog("mvx:E");
        var customData = new Dictionary<string, string> { { "logMessage", logMessages } };
        var session = SessionController.Instance;
        var user = new RaygunIdentifierMessage(session.UserName + " " + session.Company);
        var rayMessage = RaygunMessageBuilder.New
            .SetEnvironmentDetails()
            .SetMachineName(Environment.MachineName)
            .SetClientDetails()
            .SetExceptionDetails(exception)
            .SetUser(user)
            .SetUserCustomData(customData)
            .Build();
        RaygunClient.Current.Send(rayMessage);
    }
}

我的DebugTrace.cs看起来像这样：

    public class DebugTrace : IMvxTrace
{
    public void Trace(MvxTraceLevel level, string tag, Func<string> message)
    {
        Trace(level, tag, message());
    }

    public void Trace(MvxTraceLevel level, string tag, string message)
    {
        switch (level)
        {
            case MvxTraceLevel.Diagnostic:
                Log.Debug(tag, message);
                break;
            case MvxTraceLevel.Warning:
                Log.Warn(tag, message);
                break;
            case MvxTraceLevel.Error:
                Log.Error(tag, message);
                break;
            default:
                Log.Info(tag, message);
                break;
        }
    }

    public void Trace(MvxTraceLevel level, string tag, string message, params object[] args)
    {
        try
        {
            Trace(level, tag, string.Format(message, args));
        }
        catch (FormatException)
        {
            Trace(MvxTraceLevel.Error, tag, "Exception during trace of {0} {1} {2}", level, message);
        }
    }
}

我的AndroidLogReader看起来像这样：

    public class AndroidLogReader
{
    public string ReadLog(string tag)
    {
        var cmd = "logcat -d";
        if (!string.IsNullOrEmpty(tag))
        {
            cmd += " -s " + tag;
        }

        var process = Java.Lang.Runtime.GetRuntime().Exec(cmd);
        using (var sr = new StreamReader(process.InputStream))
        {
            return sr.ReadToEnd();
        }
    }
}

有了这些东西，我现在可以获得附加到我所有Raygun错误的自定义数据，其中包括来自Mvx的所有错误的堆栈跟踪。非常感谢@Kiliman将我指向构建基块以使其工作！

如何在错误报告工具中捕获MVXTrace

2 个答案: