xamarin.android

问题 can anyone please help me for how to Store Lists in Xamarin Forms Settings Plugin. 回答1: In settings Plugin you can store in a key-value fashion, so you can not directly store lists. A workaround can be, you can serialize your list into a json string, and you can store that using a key. And when you need the list back, you can get that json string using the key and deserialize it to the original format. 回答2: The Xamarin Settings plugin is obsolete and no longer maintained. Its functionality

问题 Question: Perhaps the challenge could be stated this way: How do I bind a single property in a content page to a globally stored variable in Xamarin Forms? Details: I am using the MVVM pattern. I have a navigation content page (1 of 3 such pages) with a Picker object which is populated dynamically from the collectionModel and said model is read/write. I am attempting to persist the SelectedItem (or index, whichever is most appropriate) thru all 3 content pages such that navigation from page

问题 I am unable to set the View Size matching the Display Size , below is the code, it is a Transparent View TestView testView; protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); testView = new TestView(this); SetContentView(testView); } The Default Height of the View when the app runs is height=1206 but the Display Height is 1280 , i have used the following methods to set the View Size match the Screen Size, but none works Does not work protected

问题 Today I started to learn the world of application development for Android using the Xamarin platform for visual studio 2017. I followed Xamarin's official tutorials and videos on YouTube, when I opened my first project and went to the designer,the designer's screen was fully black. This doesn't happen in any guide or article I have read. Since I'm new, I don't have much idea where the problem might be, I'm attaching appropriate pictures. My Visual Studio's Screen: Desirable Xamarin tutorial's

问题 Today I started to learn the world of application development for Android using the Xamarin platform for visual studio 2017. I followed Xamarin's official tutorials and videos on YouTube, when I opened my first project and went to the designer,the designer's screen was fully black. This doesn't happen in any guide or article I have read. Since I'm new, I don't have much idea where the problem might be, I'm attaching appropriate pictures. My Visual Studio's Screen: Desirable Xamarin tutorial's

问题 Did any of you successfully make use of the "Adaptive Icons" for xamarin android, introduced in Oreo? I managed to make it work, if the .png images are placed in the Drawable-folders, but not if they are placed in the MipMap-folders. I have followed the guidelines in this link, and it works when using Android Studio... weird I think? https://developer.android.com/guide/practices/ui_guidelines/icon_design_adaptive.html 回答1: Thanks to this blog post I was able to use adaptive Icons in my

问题 var client = new RestClient("http://10.0.2.2:50670/api"); var request = new RestRequest("Inventory", Method.GET); request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; }; // execute the request to return a list of InventoryItem RestResponse<JavaList<InventoryItem>> response = (RestResponse<JavaList<InventoryItem>>)client.Execute<JavaList<InventoryItem>>(request); The content returned is a JSON string, an array of objects. The following is a short excerpt of it: [{

问题 I have little issue with deserialize json object. My json from http url: Screen of my downloaded JSON I don't know how to deserialize to make dynamically creating buttons. I figure out how to create buttons with text, but I don't know how to make them with options that they have. I try to get these options in Windows Form app for test, but app will crash. Thank you for help. 回答1: Your classes should be something like: public class Type { public int id { get; set; } public string name { get;

问题 I have created a view flipper for my app widget that is contains 20 PNGs flipping one after another by tap. But i want to change that to auto flipping. After 1st tap i want to flip all the images automatically and stop in 1 st image again. But i am having hard time to figuring out auto flipping in remote view. My code as folows, AppWidget.cs [MetaData("android.appwidget.provider", Resource = "@xml/appwidgetprovider")] public class AppWidget : AppWidgetProvider { private static String ACTION

问题 I have created a view flipper for my app widget that is contains 20 PNGs flipping one after another by tap. But i want to change that to auto flipping. After 1st tap i want to flip all the images automatically and stop in 1 st image again. But i am having hard time to figuring out auto flipping in remote view. My code as folows, AppWidget.cs [MetaData("android.appwidget.provider", Resource = "@xml/appwidgetprovider")] public class AppWidget : AppWidgetProvider { private static String ACTION