如何访问 xamarin.android 中的文件。 还有在 Visual Studio 解决方案资源管理器中，我应该将文件放在哪里以便在我的代码中找到它

Question

The code below tries to access file named zimbabwe in Asset folder

var fileContent = File.ReadAllText("Asset/zimbabwe.shp")

How should I access files in xamarin.android? And also in Visual Studio Solution explorer where should I place the file in order to locate it in my code?

Answer 1

In Xamarin.Android project, Assets are read using an AssetManager . An instance of the AssetManager is available by accessing the Assets property on an Android.Content.Context , such as an Activity.

For example:

string content;
AssetManager assets = this.Assets;
using (StreamReader sr = new StreamReader (assets.Open ("zimbabwe.shp")))
{
    content = sr.ReadToEnd ();
}

And in Xamarin.Forms project,you could also add any file into the Assets folder in the Android project and mark the Build Action as AndroidAsset to use it with OpenAppPackageFileAsync .

using (var stream = await FileSystem.OpenAppPackageFileAsync(templateFileName))
{
  using (var reader = new StreamReader(stream))
  {
    var fileContents = await reader.ReadToEndAsync();
  }
}