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用acharengine作Android图表

首先要下载acharengine的包,里面重要的有lib和一些简易的工具,等下我附在目录里,而这些包都必须调用的。


然后下面附上基本的作图代码:

package org.achartengine.chartdemo.demo.chart;  

import java.util.ArrayList;    
import java.util.List;  

import org.achartengine.ChartFactory;    
import org.achartengine.chart.PointStyle;  
import org.achartengine.renderer.XYMultipleSeriesRenderer;  
import org.achartengine.renderer.XYSeriesRenderer;  

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

public class AverageTemperatureChart extends AbstractDemoChart {    
  public String getName() {  
    return "Average temperature";  
  }  

  public String getDesc() {    
    return "The average temperature in 4 Greek islands (line chart)";  
  }  

  public Intent execute(Context context) {    
    String[] titles = new String[] { "Crete", "Corfu", "Thassos", "Skiathos" };//图例  
    List<double[]> x = new ArrayList<double[]>();  
    for (int i = 0; i < titles.length; i++) {  
      x.add(new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 });//每个序列中点的X坐标  
    }  
    List<double[]> values = new ArrayList<double[]>();  
    values.add(new double[] { 12.3, 12.5, 13.8, 16.8, 20.4, 24.4, 26.4, 26.1, 23.6, 20.3, 17.2,  
        13.9 });//序列1中点的y坐标  
    values.add(new double[] { 10, 10, 12, 15, 20, 24, 26, 26, 23, 18, 14, 11 });//序列2中点的Y坐标  
    values.add(new double[] { 5, 5.3, 8, 12, 17, 22, 24.2, 24, 19, 15, 9, 6 });//序列3中点的Y坐标  
    values.add(new double[] { 9, 10, 11, 15, 19, 23, 26, 25, 22, 18, 13, 10 });//序列4中点的Y坐标  
    int[] colors = new int[] { Color.BLUE, Color.GREEN, Color.CYAN, Color.YELLOW };//每个序列的颜色设置  
    PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE, PointStyle.DIAMOND,  
        PointStyle.TRIANGLE, PointStyle.SQUARE };//每个序列中点的形状设置  
    XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);//调用AbstractDemoChart中的方法设置renderer.  
    int length = renderer.getSeriesRendererCount();  
    for (int i = 0; i < length; i++) {  
      ((XYSeriesRenderer) renderer.getSeriesRendererAt(i)).setFillPoints(true);//设置图上的点为实心  
    }  
    setChartSettings(renderer, "Average temperature", "Month", "Temperature", 0.5, 12.5, -10, 40,  
        Color.LTGRAY, Color.LTGRAY);//调用AbstractDemoChart中的方法设置图表的renderer属性.  
    renderer.setXLabels(12);//设置x轴显示12个点,根据setChartSettings的最大值和最小值自动计算点的间隔  
    renderer.setYLabels(10);//设置y轴显示10个点,根据setChartSettings的最大值和最小值自动计算点的间隔  
    renderer.setShowGrid(true);//是否显示网格  
    renderer.setXLabelsAlign(Align.RIGHT);//刻度线与刻度标注之间的相对位置关系  
    renderer.setYLabelsAlign(Align.CENTER);//刻度线与刻度标注之间的相对位置关系  
    renderer.setZoomButtonsVisible(true);//是否显示放大缩小按钮  

    renderer.setPanLimits(new double[] { -10, 20, -10, 40 }); //设置拖动时X轴Y轴允许的最大值最小值.        
    renderer.setZoomLimits(new double[] {  -10, 20, -10, 40 });//设置放大缩小时X轴Y轴允许的最大最小值.  
    Intent intent = ChartFactory.getLineChartIntent(context, buildDataset(titles, x, values),  
        renderer, "Average temperature111");//构建Intent  
    return intent;  
  }  

}    


有一点要注意,上面这个返回的是intent,也就是说必须有个主activity来作为传承。下面附上我的主activity:


package com.example.acharengine;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

	
	private  Button btn = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        btn = (Button)findViewById(R.id.button1);
        
        btn.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				AverageTemperatureChart intent = new AverageTemperatureChart();
				Intent mIntent =  intent.execute(MainActivity.this);
				startActivity(mIntent);
			}
		});
        
    }
}



至于XML只要有个按钮跳过去就行:


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${packageName}.${activityClass}" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_marginLeft="33dp"
        android:layout_marginTop="56dp"
        android:layout_toRightOf="@+id/textView1"
        android:text="Button" />

</RelativeLayout>



再次强调,两个重要的包,一个是lib,一个是package org.achartengine.chartdemo.demo.chart;都必须调进去。



别忘了在manifest中加入        <activity android:name="org.achartengine.GraphicalActivity" />这个activity。



下载地址:http://download.csdn.net/detail/modiziri/8179119






用acharengine作Android图表