search

dotnet / android

.NET for Android provides open-source bindings of the Android SDK for use with .NET managed languages such as C#
MIT License
1.92k stars 525 forks source link

AndroidHttpClient crashes #2498

Closed virsanna closed 5 years ago

virsanna commented 5 years ago

I have a Xamarin.Forms project, where data is given to the user through the network. In case when the phone is connected to the router through Wi-Fi, but router itself is disconnected from the network Xamarin.Essentials Connectivity gives the documented false status of connection, and so, expected behavior of the app is to fall due to timeout (that could be caught and processed to give the appropriate info to the user). Though, this expected behavior is observed on iOS and on Android emulator on VS 2017, but not on the real Android device (the app hangs and then crashes there). There is a solution in SO for this problem: https://stackoverflow.com/questions/48475378/httpclient-not-working-on-android If I change the properties of the Android project as it is said, I have another problem. In certain cases our server responds with redirect, and I hoped that it was the same issue as that: https://github.com/xamarin/xamarin-android/issues/1923 (it is solved with https://github.com/xamarin/xamarin-android/pull/2390)
I have updated the Android SDK with the last stable version yesterday, but my app still crashes.

Error message: Unable to convert instance of type 'Java.Net.URLConnectionInvoker' to type 'Java.Net.HttpURLConnection'.

StackTrace: at Java.Interop.JavaObjectExtensions.CastClass (Android.Runtime.IJavaObject instance, System.Type resultType) [0x00042] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Java.Interop/JavaObjectExtensions.cs:80 at Java.Interop.JavaObjectExtensions.JavaCast[TResult] (Android.Runtime.IJavaObject instance) [0x0002f] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Java.Interop/JavaObjectExtensions.cs:63 at Java.Interop.JavaObjectExtensions.JavaCast[TResult] (Android.Runtime.IJavaObject instance) [0x00000] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Java.Interop/JavaObjectExtensions.cs:50 at Android.Runtime.Extensions.JavaCast[TResult] (Android.Runtime.IJavaObject instance) [0x00000] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Android.Runtime/Extensions.cs:11 at Xamarin.Android.Net.AndroidClientHandler.SetupRequestInternal (System.Net.Http.HttpRequestMessage request, Java.Net.URLConnection conn) [0x00027] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Xamarin.Android.Net/AndroidClientHandler.cs:763 at Xamarin.Android.Net.AndroidClientHandler.SendAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) [0x001ec] in /Users/builder/data/lanes/1196/c72abb69/source/monodroid/external/xamarin-android/src/Mono.Android/Xamarin.Android.Net/AndroidClientHandler.cs:280 at System.Net.Http.HttpClient.SendAsyncWorker (System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpCompletionOption completionOption, System.Threading.CancellationToken cancellationToken) [0x00080] in /Users/builder/jenkins/workspace/xamarin-android/xamarin-android/external/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClient.cs:276 [and then go the methods from my project]_

Environment: Microsoft Visual Studio Community 2017 Version 15.9.3 VisualStudio.15.Release/15.9.3+28307.145 Microsoft .NET Framework Version 4.7.03056

Xamarin 4.12.3.73 (d15-9@20b35b881)

Xamarin.Android SDK 9.1.199.31 (HEAD/c72abb69c) Xamarin.Android Reference Assemblies and MSBuild support. Mono: mono/mono/mono-5.16.0.221@b63e5378e38 Java.Interop: xamarin/java.interop/master@6dd6f16 LibZipSharp: grendello/LibZipSharp/master@d695149 LibZip: nih-at/libzip/rel-1-5-1@b95cf3f MXE: xamarin/mxe/xamarin@b9cbb535 ProGuard: xamarin/proguard/master@905836d SQLite: xamarin/sqlite/3.25.2@4ea4c69 Xamarin.Android Tools: xamarin/xamarin-android-tools/master@9e78d6e

default
jeremyVignelles commented 5 years ago

Duplicate of #1945 ?

grendello commented 5 years ago

@virsanna the fix you indicated in your report is correct for your issue. However, the fix hasn't been released in stable Xamarin.Android, thus the update to the latest stable didn't have any effect for you. The fix is going to be part of the next 15.9 update as well as the upcoming 16.0 release. I'm going to close this issue, but please reopen it should the problem persist after you update to one of the aforementioned releases when they're released, thanks!

virsanna commented 5 years ago

@grendello But I have now 15.9.3. Do you mean 15.9.4?