android绘画折线图二

紧接着android绘画折线图一，下面来介绍第二种方法，使用该方法，首先需要一个Androidplot-core-0.4.3-release.jar，该jar包之后也包含在项目源码中

建立一个android项目：

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import com.androidplot.xy.SimpleXYSeries;
import com.androidplot.series.XYSeries;
import com.androidplot.xy.*;

import java.util.Arrays;

public class SimpleXYPlot extends Activity
{

    private XYPlot mySimpleXYPlot;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Initialize our XYPlot reference:
        mySimpleXYPlot = (XYPlot) findViewById(R.id.mySimpleXYPlot);

        // Create two arrays of y-values to plot:
        Number[] series1Numbers = {1, 8, 5, 2, 7, 4};
        Number[] series2Numbers = {4, 6, 3, 8, 2, 10};

        // Turn the above arrays into XYSeries:
        XYSeries series1 = new SimpleXYSeries(
                Arrays.asList(series1Numbers),          // SimpleXYSeries takes a List so turn our array into a List
                SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, // Y_VALS_ONLY means use the element index as the x value
                "Series1");                             // Set the display title of the series
        //SimpleXYSeries.ArrayFormat.XY_VALS_INTERLEAVED;
        // Same as above, for series2
        XYSeries series2 = new SimpleXYSeries(Arrays.asList(series2Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,
                "Series2");

        // Create a formatter to use for drawing a series using LineAndPointRenderer:
        LineAndPointFormatter series1Format = new LineAndPointFormatter(
                Color.rgb(0, 200, 0),                   // line color
                Color.rgb(0, 100, 0),                   // point color
                null);              // fill color (optional)

        // Add series1 to the xyplot:
        mySimpleXYPlot.addSeries(series1, series1Format);

        // Same as above, with series2:
        mySimpleXYPlot.addSeries(series2, new LineAndPointFormatter(Color.rgb(0, 0, 200), Color.rgb(0, 0, 100),
                Color.rgb(150, 150, 190)));

        // Reduce the number of range labels
        mySimpleXYPlot.setTicksPerRangeLabel(3);
        mySimpleXYPlot.setTicksPerDomainLabel(1);

        // By default, AndroidPlot displays developer guides to aid in laying out your plot.
        // To get rid of them call disableAllMarkup():
        mySimpleXYPlot.disableAllMarkup();
    }
}

这种方法需要用到布局文件，接下来看一下main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <com.androidplot.xy.XYPlot
    android:id="@+id/mySimpleXYPlot"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_marginTop="10px"
    android:layout_marginLeft="10px"
    android:layout_marginRight="10px"
    title="A Simple XYPlot Example"/>
</LinearLayout>

然后运行项目，就出来了一个折线图的效果了

注明：项目源码SimpleXYPlot.zip,Androidplot-core-0.4.3-release.jar包含在其中