xamarin.android

问题 I have been trying to make a fully custom notification with Xamarin.android. My project targets min API of 14, so expended notification are supported. I'm trying to achieve the same look for all API's so i'm using Android.Support.V4.App.NotificationCompat.Builder . I have found out that you can use setCustomContentView to set a custom View that will change the layout of the notification complitly, which is what i aim for. Here is the code that i have tried to run: RemoteViews widgetLayout =

问题 I want to convert a Xamarin PCL project to .Net Standard. My question is, what versions of Android will that support? My current project supports Android 4. Will .Net Standard be able to support it? Does it depend on the .Net Standard version? I've seen this table but it only tells me the "Xamarin" version supported, and I don't understand the connection between that and the Android version. Is .Net Standard unrelated to the Android version (somewhat like the C# version is separate from the

问题 I'm making Xamarin.Forms app which should get JSON from api and then allow to display it. My code so far: public async void jsonDownload() { connect(); await downloadData(); } public void connect() { client = new HttpClient(); client.MaxResponseContentBufferSize = 256000; } public async Task<List<Jsonclass>> downloadData() { String url = "https://my-json-server.typicode.com/kgbzoma/TestJsonFile/all"; var uri = new Uri(string.Format(url, string.Empty)); try { var response = await client

问题 I'm making Xamarin.Forms app which should get JSON from api and then allow to display it. My code so far: public async void jsonDownload() { connect(); await downloadData(); } public void connect() { client = new HttpClient(); client.MaxResponseContentBufferSize = 256000; } public async Task<List<Jsonclass>> downloadData() { String url = "https://my-json-server.typicode.com/kgbzoma/TestJsonFile/all"; var uri = new Uri(string.Format(url, string.Empty)); try { var response = await client

问题 I'm trying to understand how mono for android works and I'm not found this explanation in official site. Taking into account that android reads java bytecode, Mono for Android is a framework that need to be installed on android devices or is a compiler that compiles to java byte code? 回答1: This article on Xamarin's site describes how the architecture is put together. Long story short, there is nothing compiling C# into Java byte code. Mono for Android applications ship with the Mono runtime

问题 I am trying to upload my apk to the google store and it says You uploaded a debuggable APK. For security reasons you need to disable debugging before it can be published in Google Play. I have added android:debuggable="false" and i am signing it in release mode with a unique key still I am getting the error. I am building using xamarin <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.mycompApp.MyApp" android:versionCode="1" android:versionName="1.0" android

问题 I'm building an application with Xamarin.Forms and a Portable Class Library. I have a tabbed page. I want to change the color of the tabbed page indicator. Changing the rest of the layout is something I already managed, the only thing I do need is to change the light blue tabbed page indicator like shown below: I couldn't find anything that could work in Xamarin.Droid. This is the code that creates the tabbed page with content: class TabbedPageTry : TabbedPage { public TabbedPageTry() { Title

问题 I'm trying to generate and display QR code using ZXing package, I tried in following code I was not able to show QR code. It's showing blank image (transparent). private void OnGenerateQRCodeButton_Clicked(object sender, EventArgs e) { var writer = new BarcodeWriter { Format = BarcodeFormat.QR_CODE, Options = new EncodingOptions { Height = (int)imageCompanyLogo.Height, Width = (int) imageCompanyLogo.Width, Margin = 0, PureBarcode = true } }; var bitmap = writer.Write("www.helloworld.com");

问题 Recently, my Xamarin.Android app has started to crash on launch, caused by: Java.Lang.ClassNotFoundException: mono.android.app.Application This exception is being thrown more often than not. Usually, a rebuild fixes the issue for a build or two. I tried to combat the issue by making my own application class: [Application(AllowBackup = true, Debuggable = true, Label = "My Application", Theme = "@style/AppBaseTheme", Icon = "@drawable/icon", Logo = "@drawable/icon")] [MetaData("com.google

问题 I am working on a Xamari.Forms application in which I have a MainPageView.Xaml and MainPageViewModel.cs , also I have stackLayout inside MainPageView.Xaml where I'm loading a view ( binded to another viewmodel ) dynamically. I have to update some values in second ViewModel which is binded to the view when ever there are some changes in MainPageViewModel.cs . I'm using Messaging Center for that now but everytime i cannot use Messaging center because I have to Unsubscribe it else it will get