Android使用统计图AChartEngine 来展示数据

本文采用的统计图参考：AChartEngine

访问地址 :http://code.google.com/p/achartengine/

先给出效果图

本文的开发代码主要是这些:对一些代码进行修改

以下文件是直接使用官方下载后

这些主要是对文件【WeightTimeChart.java】做了修改

/**
 * WeightTimeChart.java
 * 版权所有(C) 2013
 * 创建:cuiran 2013-10-24 下午4:11:28
 */
package com.cayden.weightnotes.achartengine;

import java.util.Date;
import java.util.Random;

import org.achartengine.ChartFactory;
import org.achartengine.chart.PointStyle;
import org.achartengine.chart.TimeChart;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.SimpleSeriesRenderer;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import com.cayden.weightnotes.util.VeDate;

import android.content.Context;
import android.content.Intent;
import android.graphics.Color;

/**
 * TODO 折线图
 * @author cuiran
 * @version 1.0.0
 */
public class WeightTimeChart extends AbstractDemoChart {
	private static final int SERIES_NR = 1;
	/* (non-Javadoc)
	 * @see com.cayden.weightnotes.achartengine.IDemoChart#getName()
	 */
	@Override
	public String getName() {
		// TODO Auto-generated method stub
		return "WeightTimeChart";
	}

	/* (non-Javadoc)
	 * @see com.cayden.weightnotes.achartengine.IDemoChart#getDesc()
	 */
	@Override
	public String getDesc() {
		// TODO Auto-generated method stub
		return "WeightTimeChart";
	}

	 private XYMultipleSeriesDataset getDateDemoDataset() {
		    XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
		    final int nr = 7;

		    long value = new Date().getTime() - 3 * TimeChart.DAY;
		    Random r = new Random();
		    for (int i = 0; i < SERIES_NR; i++) {
		      TimeSeries series = new TimeSeries("体重变化趋势 ");

		      series.add(VeDate.strToDate("2013-10-19"), 85.3);
		      series.add(VeDate.strToDate("2013-10-20"), 85.6);
		      series.add(VeDate.strToDate("2013-10-21"), 84.5);
		      series.add(VeDate.strToDate("2013-10-22"), 85.0);
		      series.add(VeDate.strToDate("2013-10-23"), 85.1);
		      series.add(VeDate.strToDate("2013-10-24"), 85.3);
		      series.add(VeDate.strToDate("2013-10-25"), 85.3);
		      series.add(VeDate.strToDate("2013-10-26"), 85.3);

//		      for (int k = 0; k < nr; k++) {
//		        series.add(new Date(value + k * TimeChart.DAY / 4), 20 + r.nextInt() % 100);
//		      }

		      dataset.addSeries(series);

		    }
		    return dataset;
		  }

	  private XYMultipleSeriesRenderer getDemoRenderer() {
		    XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
		    renderer.setAxisTitleTextSize(19);
		    renderer.setChartTitleTextSize(23);
		    renderer.setLabelsTextSize(18);
		    renderer.setLegendTextSize(18);
		    renderer.setPointSize(6f);
		    //in this order: top, left, bottom, right
		    renderer.setMargins(new int[] {20, 30, 15, 0});

		    XYSeriesRenderer r = new XYSeriesRenderer();

		    r = new XYSeriesRenderer();
		    r.setPointStyle(PointStyle.CIRCLE);
		    r.setColor(Color.GREEN);
		    r.setFillPoints(true);

		    renderer.addSeriesRenderer(r);
		    renderer.setAxesColor(Color.DKGRAY);
		    renderer.setLabelsColor(Color.LTGRAY);
		    renderer.setChartTitle("体重变化趋势");
		    renderer.setXTitle("日期");
		    renderer.setYTitle("体重(kg)");
		    renderer.setZoomButtonsVisible(true);

		    int length = renderer.getSeriesRendererCount();
		    for (int i = 0; i < length; i++) {
		      SimpleSeriesRenderer seriesRenderer = renderer.getSeriesRendererAt(i);
		      seriesRenderer.setDisplayChartValues(true);
		    }
		    return renderer;
		  }
	/* (non-Javadoc)
	 * @see com.cayden.weightnotes.achartengine.IDemoChart#execute(android.content.Context)
	 */
	@Override
	public Intent execute(Context context) {
		// TODO Auto-generated method stub

		return ChartFactory.getTimeChartIntent(context, getDateDemoDataset(), getDemoRenderer(), "yyyy-MM-dd");
	}

}

如何调用呢？需要先获取对象参考提供的demo

private IDemoChart[] mCharts = new IDemoChart[] {new WeightDialChart(),
			new WeightTimeChart()};

 Intent intent=mCharts[1].execute(this);

		 startActivity(intent);

如果直接这样运行会报错

需要在配置文件中添加代码：

 <activity android:name="org.achartengine.GraphicalActivity" />

以上是针对如何使用AChartEngine 进行了大概说明。不要忘记看提供的API，里面有很多方法哦！