Android achartengine: Невозможно нарисовать несколько строк на графике

Question

Я рисую строки на графике на основе уравнений, которые вводит пользователь. Если пользователь вводит несколько строк, строки не могут быть нарисованы.

Вот мой код:

public void drawGraph(View v) { 
    EditText target = (EditText) findViewById(R.id.textView); 
    String equation = target.getText().toString(); 

    mRenderer = new XYMultipleSeriesRenderer(); 

    if (!equation.isEmpty()) { 
     String[] sides = equation.split("="); 
     List<String> variables = new ArrayList<String>(); 
     String tempString = ""; 

     if (sides.length > 1) { 
      String rightSide = sides[1]; 
      char[] rightSideCharacters = rightSide.toCharArray(); 

      for (char c : rightSideCharacters) { 
       if (Character.isLetter(c)) { 
        tempString = String.valueOf(c); 
        variables.add(String.valueOf(c)); 
       } 
      } 

      boolean duplicates = duplicates(variables); 


       if (duplicates == false) { 
        lines++; 

        seriesRenderer = new XYSeriesRenderer(); 
        seriesRenderer.setLineWidth(2); 
        seriesRenderer.setColor(Color.rgb(143, 2, 2)); 
        seriesRenderer.setDisplayBoundingPoints(true); 
        seriesRenderer.setPointStyle(PointStyle.CIRCLE); 
        seriesRenderer.setPointStrokeWidth(3); 

        seriesRenderer2 = new XYSeriesRenderer(); 
        seriesRenderer.setLineWidth(2); 
        seriesRenderer.setColor(Color.rgb(61, 90, 238)); 
        seriesRenderer.setDisplayBoundingPoints(true); 
        seriesRenderer.setPointStyle(PointStyle.CIRCLE); 
        seriesRenderer.setPointStrokeWidth(3); 

        if (lines == 1) { 
         mRenderer.addSeriesRenderer(seriesRenderer); 
        } 
        if (lines == 2) { 
         mRenderer.addSeriesRenderer(seriesRenderer); 
         mRenderer.addSeriesRenderer(seriesRenderer2); 
        } 

        // We want to avoid black border 
        mRenderer.setMarginsColor(Color.argb(0x00, 0xff, 0x00, 0x00)); // transparent margins 
        mRenderer.setPanEnabled(false, false); 
        mRenderer.setYAxisMax(range); 
        mRenderer.setYAxisMin(-range); 
        mRenderer.setXAxisMax(range); 
        mRenderer.setXAxisMin(-range); 
        mRenderer.setShowGrid(true); // we show the grid 

        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset(); 

        String originalRight = rightSide; 
        //System.out.println(range); 

        for (double i = -range; i < range; i++) { 
         rightSide = rightSide.replaceAll(tempString, "(" + String.valueOf(i) + ")"); 
         math.setVariable(tempString, i); 
         if (lines == 1) { 
          graph.add(i, math.evaluate(rightSide.substring(1))); 
         } 
         if (lines == 2) { 
          System.out.println(i + "," + math.evaluate(rightSide.substring(1))); 
          graph2.add(i, math.evaluate(rightSide.substring(1))); 
         } 
         rightSide = originalRight; 
        } 

        if (lines == 1) { 
         dataset.addSeries(graph); 
        } 
        if (lines == 2) { 
         dataset.addSeries(graph); 
         dataset.addSeries(graph2); 
        } 

        chartView = ChartFactory.getLineChartView(this, dataset, mRenderer); 
        //chartView.repaint(); 
        LinearLayout layout = (LinearLayout) findViewById(R.id.chartlayout); 
        layout.addView(chartView); 
       } 
      } 
     } 
    } 

Answer 1

   seriesRenderer2 = new XYSeriesRenderer(); 
       seriesRenderer.setLineWidth(2); 
       seriesRenderer.setColor(Color.rgb(61, 90, 238)); 
       seriesRenderer.setDisplayBoundingPoints(true); 
       seriesRenderer.setPointStyle(PointStyle.CIRCLE); 
       seriesRenderer.setPointStrokeWidth(3); 

должны иметь seriesRenderer2.setLineWidth (2);