【发布时间】：2020-06-11 14:26:33
【问题描述】：
我对 xamarin 非常陌生，并创建了下载通知。它的工作时间最长，但有时应用程序会在创建通知后出现胎儿错误并关闭。
我只得到这种融洽的关系，我不知道如何追踪。
=================================================================
Native Crash Reporting
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
06-02 05:39:28.296 E/mono-rt (16761): /proc/self/maps:
06-02 05:39:28.296 E/mono-rt (16761): 12c00000-16f40000 rw-p 00000000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.296 E/mono-rt (16761): 16f40000-172c0000 rw-p 04340000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.296 E/mono-rt (16761): 172c0000-17340000 ---p 046c0000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.296 E/mono-rt (16761): 17340000-173c0000 rw-p 04740000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.296 E/mono-rt (16761): 173c0000-18380000 ---p 047c0000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.296 E/mono-rt (16761): 18380000-183c0000 rw-p 05780000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
06-02 05:39:28.297 E/mono-rt (16761): 183c0000-18400000 ---p 057c0000 00:01 25459 /dev/ashmem/dalvik-main space (region space)_4473_4473 (deleted)
=================================================================
Basic Fault Adddress Reporting
=================================================================
Memory around native instruction pointer (0x6f51ecb678):0x6f51ecb668 00 1c 40 b9 c0 03 5f d6 fd 7b bf a9 fd 03 00 91 ..@..._..{......
0x6f51ecb678 08 20 40 b9 a8 00 c8 37 88 01 e0 37 00 00 40 f9 . @....7...7..@.
0x6f51ecb688 fd 7b c1 a8 c0 03 5f d6 60 08 00 b0 01 0a 00 f0 .{...._.`.......
0x6f51ecb698 03 0a 00 f0 00 24 06 91 21 80 08 91 63 8c 0a 91 .....$..!...c...
No native Android stacktrace (see debuggerd output).
这是我启动服务的方式
Methods.OnVideoDownload += new Action<Manager.Models.Container.YoutubeFileDownloadItem>((video) =>
{
if (!ObjectCacher.DownloadingFiles.ContainsKey(video.VideoId))
{
ObjectCacher.DownloadingFiles.Add(video.VideoId, video);
var intent = new Intent(this, typeof(FileService));
intent.PutExtra(FileService.URL, new AppManager().GetVideoStreamUrl(video.VideoId, 18));
intent.PutExtra(FileService.Title, video.Title);
intent.PutExtra(FileService.DirectoryName, Path.Combine(Methods.LocalMusicFolder, video.Playlist));
intent.PutExtra(FileService.FileName, video.GenerateLocalPath());
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
var servive = this.StartForegroundService(intent);
}
else
{
this.StartService(intent);
}
}
});
这里是 onstartCommand，在返回 StartCommandResult.Sticky; 后应用程序关闭
public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
{
PendingIntent pendingIntent = PendingIntent.GetActivity(MainActivity.Current, 0, intent, 0);
var url = intent.GetStringExtra(URL);
var fileName = intent.GetStringExtra(FileName);
var directory = intent.GetStringExtra(DirectoryName);
var title = intent.GetStringExtra(Title);
intent.AddFlags(ActivityFlags.ClearTop);
var nb = NotificationHelper.GetNotification1(GetString(Resource.String.Downloading) + " " + title, GetString(Resource.String.DownloadProgress), pendingIntent);
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
StartForeground(NotificationId, nb.Build());
}
var _downlodFile = new DownlodFile(url, directory, fileName, new Action<int>((procent) =>
{
nb.SetContentText("")
.SetContentTitle(GetString(Resource.String.Downloading) + $" ({procent}%) " + title)
.SetProgress(100, procent, false);
NotificationHelper.Notify(NotificationId, nb);
}), new Action(async () =>
{
try
{
await Methods.DownloadCompleted(fileName);
}
catch (Exception ex)
{
}
nb.SetOnlyAlertOnce(false).SetProgress(0, 0, false)
.SetContentText(GetString(Resource.String.Finished));
await Task.Delay(100);
NotificationHelper.Notify(NotificationId, nb);
ObjectCacher.RandomIdCacher.Remove(NotificationId);
nb.Dispose();
NotificationHelper.Dispose();
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
StopForeground(true);
}
}), new Action<Exception>((e) =>
{
nb.SetProgress(0, 0, false).SetContentText("Error: Something went wrong.\n Please try agen later.");
NotificationHelper.Notify(NotificationId, nb);
ObjectCacher.RandomIdCacher.Remove(NotificationId);
nb.Dispose();
NotificationHelper.Dispose();
if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
{
StopForeground(true);
}
}));
_downlodFile.Download();
NotificationHelper.Notify(NotificationId, nb);
return StartCommandResult.Sticky;
}
}
这里是 DownloadFile 对象
public class DownlodFile : IDisposable
{
private readonly WebClient _client;
private readonly Action<int> _onProgress;
private readonly Action<Exception> _onError;
private readonly Action _onComplete;
private readonly Uri _url;
private readonly string _fileName;
private readonly string _directoryName;
public bool Downloading { get; private set; }
// this will be true when the complete event trigger or an error trigger
public bool FileCompleted { get; private set; }
/// <summary>
/// DownlodFile
/// </summary>
/// <param name="url">File Url</param>
/// <param name="filelocation">Where file will e saved on the system</param>
/// <param name="progressChanged">Get the ProgressPercentage</param>
/// <param name="error">When an error accord</param>
public DownlodFile(string url, string directoryName, string fileName, Action<int> progressChanged = null, Action completed = null, Action<Exception> error = null)
{
_client = new WebClient();
_onProgress = progressChanged;
_fileName = fileName;
_directoryName = directoryName;
_onComplete = completed;
_onError = error;
_url = url.StartsWith("http://", StringComparison.OrdinalIgnoreCase) ? new Uri(url) : new Uri("http://" + url);
var proc = 0;
_client.DownloadProgressChanged += new DownloadProgressChangedEventHandler((o, e) =>
{
if (proc != e.ProgressPercentage)
_onProgress?.Invoke(e.ProgressPercentage);
proc = e.ProgressPercentage;
});
_client.DownloadDataCompleted += new DownloadDataCompletedEventHandler((o, e) =>
{
try
{
File.WriteAllBytes(Path.Combine(_directoryName, _fileName), e.Result);
_onComplete?.Invoke();
this.Dispose();
}
catch
{
this.Dispose();
}
});
}
public void Download()
{
try
{
if (!Directory.Exists(_directoryName))
Directory.CreateDirectory(_directoryName);
if (!FileCompleted)
{
Downloading = true;
// Start downloading the file
_client.DownloadDataAsync(_url);
}
else throw new Exception("DownlodFile is already disposed, please Create a new one");
}
catch (Exception ex)
{
FileCompleted = true;
this.Dispose();
_onError?.Invoke(ex);
}
}
public void Dispose()
{
if (!FileCompleted)
_client.Dispose();
FileCompleted = true;
Downloading = false;
}
}
}
任何导致此问题的原因或什至如何跟踪它的任何想法。
更新新的错误日志
Time Device Name Type PID Tag Message
06-02 14:40:50.354 Samsung SM-G960F Error 22222 ActivityThread android.app.IntentReceiverLeaked: Service com.google.android.youtube.api.service.YouTubeService has leaked IntentReceiver ahmr@b5a2701 that was originally registered here. Are you missing a call to unregisterReceiver()?
at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:1538)
at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:1277)
at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1555)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1528)
at android.app.ContextImpl.registerReceiver(ContextImpl.java:1516)
at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:636)
at ajgx.<init>(SourceFile:42)
at ajic.get(SourceFile:30)
at baxz.get(SourceFile:9)
at baxw.get(SourceFile:4)
at mlt.F(SourceFile:23)
at ahlo.a(SourceFile:5)
at ahlo.get(SourceFile:7)
at baxz.get(SourceFile:9)
at mma.a(SourceFile:3)
at mkr.<init>(SourceFile:11)
at com.google.android.apps.youtube.embeddedplayer.service.service.jar.ApiPlayerService.<init>(SourceFile:46)
at com.google.android.apps.youtube.embeddedplayer.service.service.jar.ApiPlayerFactoryService$1.run(SourceFile:4)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:6981)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
【问题讨论】：
标签： c# xamarin xamarin.forms xamarin.android