Question

我的应用有问题。首先，我使用片段制作了两个标签，这些标签会使活动膨胀。实现的选项卡工作正常。其次，我已经显示了 XAML 。

但是，我现在需要以异步方式运行某些内容片段中的OnCreateView。如何在不出错的情况下进行管理？

非常感谢任何帮助！谢谢

这是我的片段：

public class FragmentSettings : SupportFragment
{
    private Button mBtnOk;

    public FragmentSettings(Context context)
    {
        mContext = context;
    }

    public override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
    }

    public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        //Inflate the fragment XML
        View view = inflater.Inflate(Resource.Layout.FragmentSettings, container, false);

        //Grab the butten from the inflated fragment
        mBtnOk = view.FindViewById<Button>(Resource.Id.mBtnOk);
        mBtnOk.Click += (object sender, EventArgs e) =>
        {
            //DO stuff
        };
        //=====================================
        //Want to do something async stuff here
        //=====================================

        return view;
    }
}

Answer 1

这对我来说很有把握，感谢所有答案！

    public override async void OnActivityCreated(Bundle savedInstanceState)
    {
        base.OnActivityCreated(savedInstanceState);


        await LoadData();
    }
    private async Task LoadData()
    {
     //My async method 
    }

Answer 2

例如，您可以直接运行

AsyncTask

就这样说：

 new AsyncTask<Void, Void, Void>() {
     @Override
     protected Void doInBackground(Void... voids) {
         //do your work here
         return null;
     }
 }.execute();

Answer 3

如果您需要在后台完成任务，我会使用Backgroundworker：

BackgroundWorker bworker;

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    //Inflate the fragment XML
    View view = inflater.Inflate(Resource.Layout.FragmentSettings, container, false);

    //Grab the butten from the inflated fragment
    mBtnOk = view.FindViewById<Button>(Resource.Id.mBtnOk);
    mBtnOk.Click += (object sender, EventArgs e) =>
    {
        //DO stuff
    };

    //Start background task
    bworker = new BackgroundWorker();
    bworker.DoWork += Bworker_DoWork;
    bworker.RunWorkerCompleted += Bworker_RunWorkerCompleted;
    bworker.RunWorkerAsync();

    return view;
}


private void Bworker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{   
   //Do stuff when the operation is completed
    bworker.RunWorkerAsync();
}

private void Bworker_DoWork(object sender, DoWorkEventArgs e)
{
    //Do the work in the background
}

编辑：要使其连续运行，您可以在Bworker_RunWorkerCompleted方法中启动backgroundworker agin。（见方法）

我只是不认为这是实现连续线程的好方法，因为我觉得它会占用大量内存。你可以试试。

如何在OncreateView中运行Async？

3 个答案: