只需在任务执行方法中传递参数即可 new BackgroundTask().execute(a, b, c); // can have any number of params 现在你的背景类应该是这样的 public class BackgroundTask extends AsyncTask<String, Integer, Long> { @Override protected Long doInBackground(String... arg0) { // TODO Auto-generated method stub String a = arg0[0]; String b = arg0[1]; String c = arg0[2]; //Do the heavy task with a,b,c return null; } //you can keep other methods as well postExecute , preExecute, etc } ... 展开详请

要标记一个lambda异步，在它的参数列表前加上async： // Add a command to delete the current Group contextMenu.Commands.Add(new UICommand("Delete this Group", async (contextMenuCmd) => { SQLiteUtils slu = new SQLiteUtils(); await slu.DeleteGroupAsync(groupName); })); ... 展开详请

由于无法构建异步构造函数，可以使用静态异步方法来返回由私有构造函数创建的类实例。 public class ViewModel { public ObservableCollection<TData> Data { get; set; } //static async method that behave like a constructor async public static Task<ViewModel> BuildViewModelAsync() { ObservableCollection<TData> tmpData = await GetDataTask(); return new ViewModel(tmpData); } // private constructor called by the async method private ViewModel(ObservableCollection<TData> Data) { this.Data=Data; } } ... 展开详请