Android動態圖表

Question

我參考了@Caroilik Android Dynamic Chart的答案，用Achartengine繪製圖表。我試圖用他提供的代碼繪製三行，但似乎無法弄清楚如何做到這一點。誰能幫忙？謝謝。

Answer 1

您必須將另外兩個timeSeries添加到dataset。你必須通過移動一些實例來解決一些競爭條件。

該dataset和renderer其中已經爲多個系列。

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(); 
    } 
}