Android動態圖表

Question

您好Android開發者， 目前我正在研究一個基於財務的圖表應用程序，並且我在jjoe64博客的幫助下繪製圖表。但現在我要實現實時圖表。例如圖表自動在表面上每秒或每分鐘一次在服務器端進行更改。任何一個都可以執行這些任務。請幫助我解決這個問題。

Answer 1

好吧，我強烈建議使用AChartEngine。它是免費的，重量輕，支持多種類型的圖表餅圖，曲線圖等。要動態地更新我在一個單獨的thread.Here增加值達到了這個圖表是我的榜樣，那是沒有任何幻想：

package my.pack; 

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; 

public class ChartsActivity 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); 
    renderer.addSeriesRenderer(rendererSeries); 
    rendererSeries.setFillPoints(true); 
    rendererSeries.setPointStyle(PointStyle.CIRCLE); 

    timeSeries = new TimeSeries("Random"); 
    mThread = new Thread(){ 
     public void run(){ 
      while(true){ 
      try { 
       Thread.sleep(2000L); 
      } catch (InterruptedException e) { 
       e.printStackTrace(); 
      } 
       timeSeries.add(new Date(), random.nextInt(10)); 
       view.repaint(); 
      } 
     } 
    }; 
    mThread.start(); 
} 

@Override 
protected void onStart() { 
    super.onStart(); 
    dataset.addSeries(timeSeries); 
    view = ChartFactory.getTimeChartView(this, dataset, renderer, "Test"); 
    view.refreshDrawableState(); 
    view.repaint(); 
    setContentView(view);  
} 

} 

將自己的值添加到線程中。您可能需要查看如何使用AChartEngine庫。 快樂編碼！