android - Android动态图表

Question

我参考了@Caroilik Android Dynamic Chart关于使用 Achartengine 绘制图表的答案。我正在尝试使用他提供的代码绘制三行，但似乎无法弄清楚如何做到这一点。任何人都可以帮忙吗？谢谢。

Answer 1

您必须timeSeries在dataset. 您必须通过移动一些实例来解决一些竞争条件。

多个系列的datasetand rendererwhere 已经存在。

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

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

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;

public class ThreeTimeChart extends Activity {

    private static Random random = new Random();

    private static TimeSeries[] timeSeries;
    private static XYMultipleSeriesDataset dataset;
    private static XYMultipleSeriesRenderer renderer;
    private static XYSeriesRenderer rendererSeries;
    private static GraphicalView view;
    private static Thread mThread;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     

        dataset = new XYMultipleSeriesDataset();

        renderer = new XYMultipleSeriesRenderer();
        renderer.setAxesColor(Color.BLUE);
        renderer.setAxisTitleTextSize(16);
        renderer.setChartTitle("Time");
        renderer.setChartTitleTextSize(15);
        renderer.setFitLegend(true);
        renderer.setGridColor(Color.LTGRAY);
        renderer.setPanEnabled(true, true);
        renderer.setPointSize(10);
        renderer.setXTitle("Time");
        renderer.setYTitle("Number");
        renderer.setMargins( new int []{20, 30, 15, 0});
        renderer.setZoomButtonsVisible(true);
        renderer.setBarSpacing(10);
        renderer.setShowGrid(true);


        rendererSeries = new XYSeriesRenderer();
        rendererSeries.setColor(Color.RED);
        rendererSeries.setFillPoints(true);
        rendererSeries.setPointStyle(PointStyle.CIRCLE);
        renderer.addSeriesRenderer(rendererSeries);
        rendererSeries = new XYSeriesRenderer();
        rendererSeries.setColor(Color.BLUE);
        rendererSeries.setFillPoints(true);
        rendererSeries.setPointStyle(PointStyle.CIRCLE);
        renderer.addSeriesRenderer(rendererSeries);
        rendererSeries = new XYSeriesRenderer();
        rendererSeries.setColor(Color.YELLOW);
        rendererSeries.setFillPoints(true);
        rendererSeries.setPointStyle(PointStyle.CIRCLE);
        renderer.addSeriesRenderer(rendererSeries);

        timeSeries = new TimeSeries[3];
        timeSeries[0] = new TimeSeries("Random 0");
        timeSeries[1] = new TimeSeries("Random 1");
        timeSeries[2] = new TimeSeries("Random 2");
        timeSeries[0].add(new Date(), random.nextInt(10));
        timeSeries[1].add(new Date(), random.nextInt(10));
        timeSeries[2].add(new Date(), random.nextInt(10));
    }

    @Override
    protected void onStart() {
        super.onStart();
        dataset.addSeries(timeSeries[0]);
        dataset.addSeries(timeSeries[1]);
        dataset.addSeries(timeSeries[2]);
        view = ChartFactory.getTimeChartView(this, dataset, renderer, "Test");
        view.refreshDrawableState();
        view.repaint();
        setContentView(view);
        mThread = new Thread(){
            public void run(){
                while(true){
                try {
                    Thread.sleep(2000L);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                    timeSeries[0].add(new Date(), random.nextInt(10));
                    timeSeries[1].add(new Date(), random.nextInt(10));
                    timeSeries[2].add(new Date(), random.nextInt(10));
                    view.repaint();
                }
            }
        };
        mThread.start();
    }
}