android下使用RChart画曲线图动态刷新

最近正在android上使用RChart画曲线图，由于数据要动态更新，所以要设置更新的时间间隔。摸索了很长时间，今天终于可以了。引用的assets都是RChart demo例子中的东西，我只是修改了刷新时间。RChart demo在我的资源里，关于动态显示数据，大家要记得在Listener里面添加时间的语句，例如：

ChartAndroidImage.assets=getAssets();    
			        chartPanel = new ChartPanel(view[i].getContext());
			        Chart chart=loadFromAsset("温度");
			        chart.addChartListener(new ChartAdapter() {
						@Override
						public void chartEvent(Chart c, int type) {
							// TODO Auto-generated method stub
							super.chartEvent(c, type);
							c.msecs=2000;
							if (type==ChartListener.EVENT_BEFORE_UPDATE) 
			    			{
			    				createRealtimedata(cha,"8","temperature");
			    			} 
							if(type==ChartListener.EVENT_AFTER_UPDATE)
							{
								view[kk].postInvalidate();//我的这个rchart是在pupopwindow中显示的，所以要调用postInvalidate
							}
						}	
			    	});		
			        chart.startUpdater();
			        chartPanel.setChart(chart);

createRealtimedata:获取数据

private void createRealtimedata(ChartLoader loader,String id,String type) {
		Sensor sensor=WebserviceMethod.getSensorDataById(id);
		if(sensor!=null)
		{
			double zuigao=Double.parseDouble(sensor.getValueByType(type))+2;
			double pingjun=Double.parseDouble(sensor.getValueByType(type))-2;
			//右边为最新数据 
			maxData=maxData.substring(maxData.indexOf("|")+1)+"|"+zuigao;
			System.out.println(maxData);
			loader.setParameter("SERIE_DATA_1",maxData);
			avgData=avgData.substring(avgData.indexOf("|")+1)+"|"+pingjun;
			System.out.println(avgData);
			loader.setParameter("SERIE_DATA_2",avgData);
		}

loadFromAsset:初始化曲线图

public Chart loadFromAsset(String type) throws IOException {
    	System.out.println("Creating loader ...");			
		cha.setParameter("WIDTH","300");
		cha.setParameter("HEIGHT","250");
		cha.setParameter("TITLECHART","节点"+type+"显示");
		cha.setParameter("TITLE_FONT","Serif|BOLD|12");
		cha.setParameter("YLABEL","摄氏度");
		cha.setParameter("YSCALE_MIN","0");
		cha.setParameter("TICK_INTERVALY","2");//Y轴两个小trick之间的距离,
		cha.setParameter("YAXIS_TICKATBASE","TRUE");//Y轴trick从0开始
		cha.setParameter("XAXIS_GRID","0.2|0xffffff|DASHED");
		cha.setParameter("YAXIS_GRID","0.2|0xffffff|DASHED");		
		cha.setParameter("GRIDY","TRUE");//仅在大trick处有网格
		cha.setParameter("BIG_TICK_INTERVALX","1");//X轴两个大trick之间的小trick的数目
		cha.setParameter("XAXIS_LABELS","1|2|3|4|5|6");
		cha.setParameter("XAXIS_START_WITH_BIG_TICK","TRUE");
		cha.setParameter("YAXIS_START_WITH_BIG_TICK","TRUE");
		cha.setParameter("LEGEND_VERTICAL","false");//legend的显示方式，true为竖着显示
		cha.setParameter("SERIE_1","最高值");
		cha.setParameter("SERIE_2","平均值");
		cha.setParameter("SERIE_FONT_1","Arial|PLAIN|8");
		cha.setParameter("SERIE_FONT_2","Arial|PLAIN|8");
		cha.setParameter("SERIE_COLOR_1","RED");
		cha.setParameter("SERIE_COLOR_2","BLUE");
		cha.setParameter("SERIE_STYLE_1","2|RED|LINE");
		cha.setParameter("SERIE_STYLE_2","0.2|BLUE|LINE");
		cha.setParameter("SERIE_POINT_1","true");
		cha.setParameter("SERIE_POINT_2","true");
		cha.setParameter("SERIE_POINT_COLOR_1","RED");		
		cha.setParameter("SERIE_POINT_COLOR_2","BLUE");
		cha.setParameter("LEGEND_POSITION","BOTTOM");
		cha.setParameter("LEFT_MARGIN","0.15");
		cha.setParameter("RIGHT_MARGIN","0.05");
		cha.setParameter("TOP_MARGIN","0.15");
		cha.setParameter("BOTTOM_MARGIN","0.09");	
		cha.setParameter("CHART_BORDER","0.2|0x0|NORMAL");	
		cha.setParameter("CHART_FILL","0xeeffff");	
		cha.setParameter("CHART_LINKS_TARGET","_self");	
		cha.setParameter("SERIE_DATA_1",maxData);
		cha.setParameter("SERIE_DATA_2",avgData);
		Log.i(ChartPanel.TAG,"Building chart ...");

		Chart c=cha.build(false,false);	

		Log.i(ChartPanel.TAG,"Build ok");			
		
		return c;   
    }

下载地址：http://download.csdn.net/detail/yonghumingshishenme/3118685