android的数据报表显示

从图中,我们可以看出,绘制一个图表我们其实,我们只需要理解三个概念

1,ChartFactory ,传入XYMutilpleSeriesRenderer,XYMutilpleSeriesDataset,然后,我们只需用 getXXXChartIntent(Context context,XYMutilpleSeriesRenderer,XYMutilpleSeriesDataset,)方法就可以进行图表的显示

2,XYMutilpleSeriesRenderer 用于进行绘制的设置,添加的XYSeriesRender对象,用于定义绘制的点集合设置,注意数量要和XYMutilpleSeriesDataset,添加的XYseries一致!!!

3,XYMutilpleSeriesDataset 用于数据的存放,添加的XYseries对象,用于提供绘制的点集合的数据

step1：在这个网址下载http://code.google.com/p/achartengine/图表achartengine的jar包，上面包括开发API和源码例子

step2:在在android项目下创建一个libs目录，把红线部分的jar包拷贝进去，然后右键项目->properties->Add jars选择lib下面的jar包。

step3:在manifest.xml里面添加    <activity android:name="org.achartengine.GraphicalActivity" />

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.lp.ecjtu"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-sdk android:minSdkVersion="10" />

<application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".ShowExam2Activity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <activity android:name="org.achartengine.GraphicalActivity" />
    </application>

</manifest>

java代码：

package com.lp.ecjtu;

import java.util.Random;

import org.achartengine.ChartFactory;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;

public class ShowExam2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //1 构造显示渲染图
        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
        //2,进行显示
        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
        //2.1构建数据
        Random r = new Random();
        for(int i=0;i<2;i++){
            XYSeries series = new XYSeries("text"+(i+1));
            //填充数据
            for(int k=0;k<10;k++){
                //填写x,y的值
                series.add(k, r.nextInt() % 100);
            }
            //需要绘制的点放进dataset中
            dataset.addSeries(series);
            
        }
        //3. 对点的绘制进行设置
        XYSeriesRenderer xyRenderer = new XYSeriesRenderer();
        //3.1设置颜色
        xyRenderer.setColor(Color.GREEN);
        //3.2设置点的样式
        xyRenderer.setPointStyle(PointStyle.SQUARE);
        // 3.3, 将要绘制的点添加到坐标绘制中
        renderer.addSeriesRenderer(xyRenderer);
        //重复1-3的步骤绘制第二个系列点
        
         xyRenderer = new XYSeriesRenderer();
         xyRenderer.setColor(Color.RED);
         xyRenderer.setPointStyle(PointStyle.SQUARE);
         renderer.addSeriesRenderer(xyRenderer);
        Intent intent = ChartFactory.getLineChartIntent(this, dataset, renderer);
        startActivity(intent);
    }
}

运行效果图：