Xamarin图表开发基础教程(4)OxyPlot框架
XamaminAndroid中绘制线图OxyPlotAndroidDemo
【示例1-1:OxyPlotAndroidDemo】下面实现线图的绘制。具体的操作步骤如下:
(1)打开Xamarin.Android项目。
(2)将OxyPlot.Xamarin.Android组件添加到项目中的引入中。
(3)打开activity_main.axml文件,使用PlotView进行布局。代码如下:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <OxyPlot.Xamarin.Android.PlotView android:id="@+id/plot_view" android:layout_width="match_parent" android:layout_height="match_parent"/> </RelativeLayout>
(4)打开MainActivity.cs文件,在此文件中实现剩余的步骤,即绘制图表并设置显示模式。代码如下:
using Android.App; using Android.OS; using Android.Support.V7.App; using Android.Runtime; using Android.Widget; using OxyPlot.Xamarin.Android; using OxyPlot; using OxyPlot.Axes; using OxyPlot.Series; namespace OxyPlotAndroidDemo { [Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)] public class MainActivity : AppCompatActivity { protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); // Set our view from the "main" layout resource SetContentView(Resource.Layout.activity_main); PlotView view = FindViewById<PlotView>(Resource.Id.plot_view); view.Model = CreatePlotModel(); //设置显示模式 } //绘制图表 private PlotModel CreatePlotModel() { //创建图表模式 var plotModel = new PlotModel { Title = "OxyPlot Demo" }; //添加坐标轴 plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom }); plotModel.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Maximum = 10, Minimum = 0 }); //创建数据列 var series1 = new LineSeries { Title= "Data", MarkerType = MarkerType.Circle, MarkerSize = 4, MarkerStroke = OxyColors.White }; //添加数据点 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)); //添加数据列 plotModel.Series.Add(series1); return plotModel; } } }
运行程序,显示的图表如图1.1所示。
图1.1 Xamarin.Android平台的线图效果
原文地址:https://www.cnblogs.com/daxueba-ITdaren/p/11829109.html
时间: 2024-10-11 01:41:47