如何

Question

我使用時間戳的achartengine庫forline graph.Instead如何可以顯示x軸的日期改變條狀圖achartengine x軸的顯示值

我的代碼是

public GraphicalView getLine(Context context, LinkedHashMap<String, List<Item>> data, String value2, String value3) { 


     List<TimeSeries> series=new ArrayList<TimeSeries>(); 
     Set<String> keys = data.keySet(); 
     for(String key:keys) 
     { 
      TimeSeries series1 = new TimeSeries(key); 
      List<Item> value=data.get(key); 
      for(Item itm:value) 
      { 
       Double temp=Double.parseDouble(itm.getDataItem(value3)); 
       String temp1=null; 
       if(value2.equals("created_time")) 
       { 

        temp1=itm.getCreated_time(); 
       } 
       else 
       { 
        try 
        { 
        temp1=itm.getModified_time(); 
        } 
        catch (NullPointerException e) { 
         temp1=itm.getCreated_time(); 
        } 


       } 
       Timestamp timestamp = new Timestamp(Integer.parseInt(temp1.substring(0,10))); 
       Date date = new Date(timestamp.getTime()*1000); 

       series1.add(date,temp); 

      } 
      series.add(series1); 
     } 




     XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset(); 
     for(TimeSeries serie:series) 
     { 

      dataset.addSeries(serie); 

     } 


     XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); // Holds a collection of XYSeriesRenderer and customizes the graph 
     mRenderer.setBackgroundColor(Color.BLACK); 
     mRenderer.setZoomEnabled(true); 
     mRenderer.setAntialiasing(true); 

     for(TimeSeries serie:series) 
     { 
     XYSeriesRenderer renderer = new XYSeriesRenderer(); // This will be used to customize line 1 
     mRenderer.addSeriesRenderer(renderer); 

     int color; 
     Random rnd = new Random(); 
     color = Color.argb(200, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256)); 
     renderer.setColor(color); 

     renderer.setPointStyle(PointStyle.CIRCLE); 
     renderer.setFillPoints(true); 

     } 
     return ChartFactory.getLineChartView(context, dataset, mRenderer); 


    } 

Answer 1

我發現了一個更好的解決方案

ChartFactory.getTimeChartView(context, dataset,mRenderer, "DD-MM-YYY"); 

Answer 2

您可以設置自定義標籤：

renderer.addXTextLabel(x, formattedDate);