Author: Enrico

In Xamarin Forms there is a native function called UriBuilder: it allow you to create a well-formed url. In my implementation, all parameters are in a Dictionary called parameters. Using Linq, I put in builder.Query only the parameters with a value. UriBuilder builder = new UriBuilder(yourUrl); Dictionary<string, string> parameters = new Dictionary<string, string>(); parameters.Add(“reference”, Reference); parameters.Add(“param1”, Param1); builder.Query = string.Join(“&”, parameters.Where(p => !string.IsNullOrWhiteSpace(p.Value)) .Select(p => string.Format(“{0}={1}”, Uri.EscapeDataString(p.Key), Uri.EscapeDataString(p.Value)))); return builder.ToString(); Happy coding!

Xamarin Forms doesn’t have a Label with a Bindable FormattedString. For example, if you want a bindable bold word in the middle of a sentence in a Label, it’s very hard to design it with common control. For that, I create my own component for that. LabelRenderer.cs using System.Collections.Generic; using System.Collections.ObjectModel; using System.Collections.Specialized; using System.Linq; using System.Runtime.CompilerServices; using Xamarin.Forms; namespace PSC.Controls { public class Label : Xamarin.Forms.Label { protected override void OnBindingContextChanged() { base.OnBindingContextChanged(); UpdateFormattedTextBindingContext(); } protected override void OnPropertyChanged( [CallerMemberName] string propertyName = null) { base.OnPropertyChanged(propertyName); if (propertyName ==…

In my previous post called Xamarin: how to Start an Application at Device Boot in Android, I explained how you can change your Android Xamarin’s project to launch your app at the device boot. It is a good start but my problem was a bit more complex. I want to create a background service to track the geolocation of a device. I googled a lot to find a solution without a great success. Then I started to implement my code with some tests. Finally, I found a good way and…

This tutorial will explain to stat an application while the Android device boot-up. For this, we need to  listen to the BOOT_COMPLETED action and react to it. BOOT_COMPLETED is a Broadcast Action that is broadcast once, after the system has finished booting. You can listen to this action by creating a BroadcastReceiver that then starts your launch Activity when it receives an intent with the BOOT_COMPLETED action. Add this permission to your manifest In your Android.Manifest you must add thi permission: <uses-permission android:name=”android.permission.RECEIVE_BOOT_COMPLETED” />   Then open this file and…