android - Xamarin android 找不到 id 字段

Question

我正在使用 visual studio 2015 中的 xamarin 在 android 上工作。我想添加一个图表，所以为了基本理解，我跟进了 oxyplot并下载了文档(示例代码)。现在我只是复制源代码，而是通过编写代码。当我到达点FindViewById<PlotView>(Resource.Id)我找不到 Id其中的字段。为了更好的理解，请看下面的图片和代码

下面是我复制的代码

using Android.App;
using Android.OS;

using OxyPlot.Xamarin.Android;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;

namespace AndroidApp1
{
  [Activity(Label = "AndroidApp1", MainLauncher = true, Icon = "@drawable/icon")]

public class MainActivity : Activity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        PlotView view = FindViewById<PlotView>(Resource.Id.plot_view);
        view.Model = CreatePlotModel();
    }

    private PlotModel CreatePlotModel()
    {
        var plotModel = new PlotModel { Title = "OxyPlot Demo" };

        plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom });
        plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Maximum = 10, Minimum = 0 });

        var series1 = new LineSeries
        {
            MarkerType = MarkerType.Circle,
            MarkerSize = 4,
            MarkerStroke = OxyColors.White
        };

        series1.Points.Add(new DataPoint(0.0, 6.0));
        series1.Points.Add(new DataPoint(1.4, 2.1));
        series1.Points.Add(new DataPoint(2.0, 4.2));
        series1.Points.Add(new DataPoint(3.3, 2.3));
        series1.Points.Add(new DataPoint(4.7, 7.4));
        series1.Points.Add(new DataPoint(6.0, 6.2));
        series1.Points.Add(new DataPoint(8.9, 8.9));

        plotModel.Series.Add(series1);

        return plotModel;
    }
}}

波纹管是我正在写的

using Android.App;
using Android.OS;

using OxyPlot.Xamarin.Android;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;


namespace SampleChart
{
[Activity(Label = "SampleChart", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);
        PlotView view = FindViewById<PlotView>(Resource.Id)
    }
}}

我不知道我错过了什么。 任何帮助将不胜感激

Answer 1

您尝试访问的 ID 必须在 Xml 文件中定义 像这样的东西

`android:id="@+id/Content"

这样您就可以指出具有 ID 的资源，或者它必须在另一个文件中进行优化，例如 values->id.xml