Android中使用achartengine生成圖表的具體方法

2020-04-11 11:58:16

字體：大中小

來(lái)源：轉(zhuǎn)載

供稿：網(wǎng)友

今天在做項(xiàng)目的時(shí)候用到了圖表功能，記錄下來(lái)

achartengine是google的一個(gè)開源項(xiàng)目，可以在https://code.google.com/p/achartengine/ 下載技術(shù)文檔，jar包以及項(xiàng)目源代碼

demo下載：https://code.google.com/p/achartengine/downloads/list

一、餅狀圖

新建工程，添加achartengine jar包

PieChart.java

復(fù)制代碼代碼如下:

package com.meritit.footlottery.view;

import org.achartengine.ChartFactory;
import org.achartengine.model.CategorySeries;
import org.achartengine.renderer.DefaultRenderer;
import org.achartengine.renderer.SimpleSeriesRenderer;

import android.content.Context;
import android.graphics.Color;
import android.view.View;

public class PieChart {
public View execute(Context context) {
  int[] colors = new int[] { Color.RED, Color.YELLOW, Color.BLUE };
  DefaultRenderer renderer = buildCategoryRenderer(colors);
  CategorySeries categorySeries = new CategorySeries("Vehicles Chart");
  categorySeries.add("勝 ", 30);
  categorySeries.add("負(fù)", 20);
  categorySeries.add("平", 60);
  return ChartFactory
    .getPieChartView(context, categorySeries, renderer);
}

protected DefaultRenderer buildCategoryRenderer(int[] colors) {
  DefaultRenderer renderer = new DefaultRenderer();
  for (int color : colors) {
   SimpleSeriesRenderer r = new SimpleSeriesRenderer();
   r.setColor(color);
   renderer.addSeriesRenderer(r);
  }
  //顯示標(biāo)簽
  renderer.setShowLabels(true);
  //不顯示底部說(shuō)明
  renderer.setShowLegend(false);
  //設(shè)置標(biāo)簽字體大小
  renderer.setLabelsTextSize(15);
  renderer.setLabelsColor(Color.BLACK);
  renderer.setZoomEnabled(false);
  renderer.setPanEnabled(false);
  return renderer;
}
}

使用方法

復(fù)制代碼代碼如下:

//View pieChart = new PieChart().execute(this);
//chartArea.addView(pieChart);

獲得一個(gè)View對(duì)象，在需要添加的布局下面直接addView

二、柱狀圖

復(fù)制代碼代碼如下:

package com.meritit.footlottery.view;

import java.util.Random;

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

import com.meritit.footlottery.R;

import android.content.Context;
import android.graphics.Color;
import android.view.View;

public class BarChart {
private Context context;
public View execute(Context context) {
  this.context = context;
  return ChartFactory
    .getBarChartView(context, getBarDemoDataset(), getBarDemoRenderer(), Type.DEFAULT);
}

    /**
     * XYMultipleSeriesDataset 類型的對(duì)象，用于提供圖表需要表示的數(shù)據(jù)集，
     * 這里我們用 getBarDemoDataset 來(lái)得到它。
     */
    private XYMultipleSeriesDataset getBarDemoDataset() {
        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
        final int nr = 10;
        Random r = new Random();
        for (int i = 0; i < 3; i++) {
            CategorySeries series = new CategorySeries("球隊(duì) " + (i + 1));
            for (int k = 0; k < nr; k++) {
                series.add(100 + r.nextInt() % 100);
            }
            dataset.addSeries(series.toXYSeries());
        }
        return dataset;
    }

    /**
     * XYMultipleSeriesRenderer 類型的對(duì)象，用于提供圖表展現(xiàn)時(shí)的一些樣式，
     * 這里我們用 getBarDemoRenderer 方法來(lái)得到它。
     * getBarDemoRenderer 方法構(gòu)建了一個(gè) XYMultipleSeriesRenderer 用來(lái)設(shè)置2個(gè)系列各自的顏色
     */
    public XYMultipleSeriesRenderer getBarDemoRenderer() {
        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
        SimpleSeriesRenderer r = new SimpleSeriesRenderer();
        r.setColor(Color.BLUE);
        renderer.addSeriesRenderer(r);
        r = new SimpleSeriesRenderer();
        r.setColor(Color.GREEN);
        renderer.addSeriesRenderer(r);
        r = new SimpleSeriesRenderer();
        r.setColor(Color.RED);
        renderer.addSeriesRenderer(r);
        renderer.setApplyBackgroundColor(true);
        renderer.setBackgroundColor(Color.TRANSPARENT);
        renderer.setMarginsColor(context.getResources().getColor(R.color.main_background_color));
        renderer.setZoomEnabled(false, false);
        renderer.setPanEnabled(false, false);
        renderer.setLabelsTextSize(15);
  renderer.setLabelsColor(Color.BLACK);
        setChartSettings(renderer);
        return renderer;
    }

    /**
     * setChartSettings 方法設(shè)置了下坐標(biāo)軸樣式。
     */
    private void setChartSettings(XYMultipleSeriesRenderer renderer) {
        renderer.setChartTitle("戰(zhàn)績(jī)分析");
        renderer.setXTitle("橫坐標(biāo)");
        renderer.setYTitle("縱坐標(biāo)");
        renderer.setXAxisMin(0.5);
        renderer.setXAxisMax(10.5);
        renderer.setYAxisMin(0);
        renderer.setYAxisMax(210);
    }
}