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Advanced topic - Platform.CreateRenderer() memory leak
So I have been building my own ListView control for iOS. Basically I needed to create a really high performance ListView control with recycling, support for uneven row heights, on the fly expanding...
View ArticleSignalR call not executing from OnSleep Method, if app minimized or closed in...
When i minimized app, SignalR Call not executed inside OnSleep() APP.XAML.CS file protected override void OnSleep() { try { if (Device.RuntimePlatform == Device.iOS) { if (App._connection != null...
View ArticleHow to get the Selected Value From the Picker in xamarin
I am having the following Picker code, From this how to get the selected value,(not Display value), i need to get the corresponding another parameter, which selected in picker
View ArticleHow to create bindable event handler in custom view cell
Hi, I have created native ViewCellRenderer for view cell that is being used in list view For UWP by following Microsoft article Customizing a ViewCell. The article explains how to create bindable...
View ArticleNUnit 3 / UITest failing with error: Exception has been thrown by the target...
Hi I have a Xamarin UI test project with tests apps on iOS and Android simulators. I have recently updated my nuget packages to the latest version. I run my tests on an Android emulator or iOS...
View ArticleHandle Crash Gracefully
Hello Everyone, I am trying to implement unhandled exception in Xamarin Form. Something similar to this https://github.com/Ereza/CustomActivityOnCrash. So when the app is about to crash display a nice...
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Facebook Interstitial Ads error "Specified cast is not vailid"
I use DependencyService to implemement Interstitial Facebook Ads it's error `public class FacebookIntertialsAds : IFacebookIntertialsAds { private InterstitialAd interstitialAd; private...
View ArticleEmojis and special characters are not showing properly in push notification...
I have implemented push notification in my xamarin forms android part using FCM. When sending a new message the push notification starts work. But the special characters and emojis not showing properly...
View ArticleFingerprints warehouse
Hi! Is there any API, package, charm... for create and maintenance my own warehouse of fingerprints? I don't want to use native fingerprint manager to authenticate, only the hardware of device and in...
View ArticleXamarin Forms - trigger local notification on android background
Hi I'm currently working on one app (ios and android) to scan beacons (iBeacon/Eddystone URL). All is good on both platforms when I have the app running in foreground. Once in background things are a...
View ArticleHow to implement with Google Drive after login with Xamarin.Auth?
I have follow Xamarin.Auth to login Google How to implement Google Drive after login with Xamarin.Auth (Download, Upload). Thank you!
View ArticlePicker > Get Value and Label
Hello, How to bind picker value and label. I need selected change picker get value and label.
View ArticleXamarin Navigation Problem
Hello everyone, so I got a problem when I want to push a ZXingScannerPage for scan a QRCode. This is my code : MainPage = new NavigationPage(new MainPage()); var scanPage = new ZXingScannerPage();...
View ArticleNative views from within Xamarin.forms app - should I use DependencyService?
I'm new to Xamarin.forms. Everything I've done thus far is platform independent using Xamarin. I would like to be able to load/show a native view from both iOS and Android from a form within Xamarin...
View ArticleSeeing Beacons in the background on Android in a X.F PCL solution.
So its straight forward enough to monitor for beacons in the foreground in a PCL with the Androids MainActivity being the IBeaconConsumer. But I'm not sure how to get background monitoring working, as...
View ArticleHow to retrieve png image from SpecialFolder.LocalApplicationData and show on...
I'm sending image by TCP and save on SpecialFolder.LocalApplicationData. Next I want to retrieve this image and show as button.Image in runtime, but the image doesn't show, only empty button....
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ObservableCollection in ListView not updating programatically
Hello everyone, I have a listview with an ObservableCollection of a class, I'm updating a property inside this class but the value isnt updating properly. private ObservableCollection<Place>...
View ArticleA lot of Xamarin Android Emulator Problems
I had been using Xamarin Forms with Android Emulator in Visual Studio 2017 for some basic Android projects and it worked pretty well (though fairly slow). My hardware is i5, 12 GB RAM, SSD drive, and I...
View ArticleWeird navigation in HamburgerMenu sample project from Prism-Samples-Forms
(The forum does not allow me to paste links, so I apologize for the inconvenience of neutered links.) The Prism library has a Prism-Samples-Forms[1] repo with a HamburgerMenu project. The HamburgerMenu...
View ArticleFilling Webview Content Automaticly
Hi. I'm developing a webview application. and here I want the fields to come automatically after the first entry. Can you help with the topic?
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