This is an unfortunate side-effect of MonoTouch (who is garbage collected) having to live in a reference counted world (ObjectiveC). There are a few pieces of information required to be able to understand what’s going on: For every managed object (derived from NSObject), there is a corresponding native object. For custom managed classes (derived from … Read more
I have shipped a non-trivial app written with Xamarin. Many others have as well. “Garbage collection” isn’t magic. If you create a reference that is attached to the root of your object graph and never detach it, it will not be collected. That’s not only true of Xamarin, but of C# on .NET, Java, etc. … Read more
You can calculate available number of columns, given a desired column width, and load the image as calculated. Define a static funtion to calculate as: public class Utility { public static int calculateNoOfColumns(Context context, float columnWidthDp) { // For example columnWidthdp=180 DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics(); float screenWidthDp = displayMetrics.widthPixels / displayMetrics.density; int noOfColumns = (int) … Read more
If someone gets here by searching for ERROR ITMS-90046 like me, my solution was to Clean it and delete all precompiled frameworks (the custom ones) and then build again. Note: The error description said something about key “aps-environment” as “development”.
Follow these three steps: Create a key called FacebookAppID with a string value, and add the app ID there. Create a key called FacebookDisplayName with a string value, and add the Display Name you configured in the App Dashboard. Create an array key called URL types with a single array sub-item called URL Schemes. Give … Read more
I came across this interesting post: https://medium.com/@harrycheung/mobile-app-performance-redux-e512be94f976#.kfbauchtz
You cannot access directly an sql server from your pcl project in Xamarin.Forms because System.Data.SqlClient is not available on pcl. But you can do it through a dependency service. First in you PCL project declare you service public interface IDbDataFetcher { string GetData(string conn); } Then on you Android project implement the service interface [assembly: … Read more
You need to set the project option to have it run your console app in an external console: Visual Studio For Mac: Project Options / Run / Configurations / Default / Run on external console Xamarin Studio: Project Options / Run / General / Run on external console
Android: public void OpenPdf(string filePath) { Android.Net.Uri uri = Android.Net.Uri.Parse(“file:///” + filePath); Intent intent = new Intent(Intent.ActionView); intent.SetDataAndType(uri, “application/pdf”); intent.SetFlags(ActivityFlags.ClearWhenTaskReset | ActivityFlags.NewTask); try { Xamarin.Forms.Forms.Context.StartActivity(intent); } catch (Exception) { Toast.MakeText(Xamarin.Forms.Forms.Context, “No Application Available to View PDF”, ToastLength.Short).Show(); } } iOS, a bit more complex and requiries some extra classes: public void OpenPDF(string filePath) { FileInfo … Read more
tried changing my target android version to 8.1 You need to change the Target Framework that is used to compile your android application, not the Target Android version (but assumably you would set these two to the same, read the Understanding Android API Levels link below. Visual Studio for Windows: Visual Studio for Mac: Target … Read more