AChartEngine应用之BarChart（柱形图）

AChartEngine应用之BarChart（柱形图）

接着上文，构建柱形图的步骤和构建饼图的步骤一样，主要分为以下三步，还需要在项目中引入AChartEngine依赖jar包，在Manifest中添加：<activityandroid:name="org.achartengine.GraphicalActivity" />

1.设置XYMultipleSeriesRenderer主要描绘器

2.构建数据源XYMultipleSeriesDataset

3.通过ChartFactory获取柱形图

运行效果图：

code

package com.qiuzhping.achart;

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

import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.BarChart.Type;
import org.achartengine.model.CategorySeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.SimpleSeriesRenderer;
import org.achartengine.renderer.XYMultipleSeriesRenderer;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Paint.Align;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;

public class BarChartBuilder extends Activity {

	private GraphicalView mChartView;

	public void back(View v) {
		Log.i("qiuzhping", "back onClick");
		Intent intent = new Intent();
		intent.setClass(BarChartBuilder.this, MainActivity.class);
		startActivity(intent);
		BarChartBuilder.this.finish();
	}

	protected void setChartSettings(XYMultipleSeriesRenderer renderer,
			String title, String xTitle, String yTitle, double xMin,
			double xMax, double yMin, double yMax, int axesColor,
			int labelsColor) {
		renderer.setChartTitle(title);
		renderer.setXTitle(xTitle);
		renderer.setYTitle(yTitle);
		renderer.setXAxisMin(xMin);
		renderer.setXAxisMax(xMax);
		renderer.setYAxisMin(yMin);
		renderer.setYAxisMax(yMax);
		renderer.setAxesColor(axesColor);
		renderer.setLabelsColor(labelsColor);
	}

	protected XYMultipleSeriesRenderer buildBarRenderer(int[] colors) {
		XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
		renderer.setAxisTitleTextSize(16);
		renderer.setChartTitleTextSize(20);
		renderer.setLabelsTextSize(15);
		renderer.setLegendTextSize(15);
		int length = colors.length;
		for (int i = 0; i < length; i++) {
			SimpleSeriesRenderer r = new SimpleSeriesRenderer();
			r.setColor(colors[i]);
			renderer.addSeriesRenderer(r);
		}
		return renderer;
	}

	protected XYMultipleSeriesDataset buildBarDataset(String[] titles,
			List<double[]> values) {//柱形图的数据源和饼图差不多，也是由一些键值对组成
		XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
		int length = titles.length;
		for (int i = 0; i < length; i++) {
			CategorySeries series = new CategorySeries(titles[i]);
			double[] v = values.get(i);
			int seriesLength = v.length;
			for (int k = 0; k < seriesLength; k++) {
				series.add(v[k]);
			}
			dataset.addSeries(series.toXYSeries());
		}
		return dataset;
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.xy_chart);
		LinearLayout mLinear = (LinearLayout) findViewById(R.id.chart);
		mLinear.setBackgroundColor(Color.BLACK);

		String[] titles = new String[] { "2012", "2013" };
		List<double[]> values = new ArrayList<double[]>();
		values.add(new double[] { 1423, 1230, 1424, 1524, 1590, 1920, 2203,
				2120, 1950, 1550, 1260, 1400 });
		values.add(new double[] { 523, 730, 924, 1054, 790, 920, 1200, 1100,
				950, 1500, 1100, 1500 });
		int[] colors = new int[] { Color.RED, Color.BLUE };
		XYMultipleSeriesRenderer renderer = buildBarRenderer(colors);// 柱形图颜色设置
		setChartSettings(renderer, "柱形图示例", "月份", "数量", 0.5, 12.5, 0, 2400,
				Color.GRAY, Color.LTGRAY);// 设置柱形图标题，横轴（X轴）、纵轴（Y轴）、最小的伸所刻度、最大的伸所刻度
		renderer.getSeriesRendererAt(0).setDisplayChartValues(true);// 在第0条柱形图上显示数据
		renderer.getSeriesRendererAt(1).setDisplayChartValues(true);// 在第1条柱形图上显示数据
		renderer.setXLabels(12);
		renderer.setYLabels(10);
		renderer.setXLabelsAlign(Align.LEFT);// 数据从左到右显示
		renderer.setYLabelsAlign(Align.LEFT);
		renderer.setPanEnabled(true, false);
		renderer.setZoomEnabled(true);
		renderer.setZoomButtonsVisible(true);// 显示放大缩小功能按钮
		renderer.setZoomRate(1.1f);
		renderer.setBarSpacing(0.5f);// 柱形图间隔

		if (mChartView == null) {// 构建柱形图
			mChartView = ChartFactory.getBarChartView(getApplicationContext(),
					buildBarDataset(titles, values), renderer, Type.DEFAULT);
			renderer.setClickEnabled(true);
			//renderer.set
			mLinear.addView(mChartView, new LayoutParams(
					LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
		} else
			mChartView.repaint();
	}
}

对应的完整项目：http://download.csdn.net/detail/qiu_11/6854803

未完待续。。。。。

AChartEngine应用系列文章

（一）AChartEngine简介

（二）AChartEngine应用之PieChart（饼图）

（三）AChartEngine应用之BarChart（柱形图）

（四）AChartEngine应用之PieChart（动态饼图，允许产生动态数据并显示）

（五）AChartEngine应用之LineChart（模拟生命特征值图）