线性布局问题，跪求高手指点

Question

public class ChartActivity extends Activity { 
 private final int WC = ViewGroup.LayoutParams.WRAP_CONTENT;  
 private final int FP = ViewGroup.LayoutParams.FILL_PARENT;  
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState);
        
        //1.定义线性布局
        LinearLayout layout  = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        
        //2.表格布局控件===
        TableLayout tableLayout = (TableLayout)findViewById(R.id.tableLayout);  
//        tableLayout.setStretchAllColumns(true);  
        for(int row=0;row<10;row++)  
        {  
            TableRow tableRow=new TableRow(this);  
            for(int col=0;col<8;col++)  
            {  
                TextView tv=new TextView(this);  
                tv.setText("("+col+","+row+")");  
                tableRow.addView(tv);  
            }  
            tableLayout.addView(tableRow, new TableLayout.LayoutParams(FP, WC));  
        }
        //=====
        
        
        //3.定义曲线图====
        String[] titles = new String[] { "First", "Second"};
        List<double[]> x = new ArrayList<double[]>(); 
        List<double[]> y = new ArrayList<double[]>();        x.add(new double[] { 1, 3, 5, 7, 9, 11} ); 
        x.add(new double[] { 0, 2, 4, 6, 8, 10} );        y.add(new double[] { 3, 14, 5, 30, 20, 25}); 
        y.add(new double[] { 18, 9, 21, 15, 10, 6});
        XYMultipleSeriesDataset dataset = buildDataset(titles, x, y);        int[] colors = new int[] { Color.BLUE, Color.GREEN}; 
        PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE, PointStyle.DIAMOND}; 
        XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles, true);
        setChartSettings(renderer, "Line Chart Demo", "X", "Y", -1, 12, 0, 35 , Color.WHITE, Color.WHITE);
        View chart = ChartFactory.getLineChartView(this, dataset, renderer);
        //=======
        
        layout.addView(chart, 500, 400);
        layout.addView(tableLayout, 500, 400);
        setContentView(layout); 
    }    protected XYMultipleSeriesDataset buildDataset(String[] titles, 
                                                   List<double[]> xValues, 
                                                   List<double[]> yValues) 
    { 
        XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();        int length = titles.length;                  //有几条线 
         for (int i = 0; i < length; i++) 
        { 
            XYSeries series = new XYSeries(titles[i]);    //根据每条线的名称创建 
              double[] xV = (double[]) xValues.get(i);                 //获取第i条线的数据 
              double[] yV = (double[]) yValues.get(i); 
            int seriesLength = xV.length;                 //有几个点              for (int k = 0; k < seriesLength; k++)        //每条线里有几个点 
              { 
                series.add(xV[k], yV[k]); 
            }            dataset.addSeries(series); 
        }        return dataset; 
    }    protected XYMultipleSeriesRenderer buildRenderer(int[] colors, PointStyle[] styles, boolean fill) 
    { 
        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer(); 
        int length = colors.length; 
        for (int i = 0; i < length; i++) 
        { 
            XYSeriesRenderer r = new XYSeriesRenderer(); 
            r.setColor(colors[i]); 
            r.setPointStyle(styles[i]); 
            r.setFillPoints(fill); 
            renderer.addSeriesRenderer(r); 
        } 
        return renderer; 
    }    protected void setChartSettings(XYMultipleSeriesRenderer renderer, String title, 
                                String xTitle,String yTitle, double xMin, 
                                double xMax, double yMin, double yMax, 
                                int axesColor,int labelsColor) 
    { 
        renderer.setChartTitle(title); 
        renderer.setXTitle(xTitle); 
        renderer.setYTitle(yTitle); 
        renderer.setXAxisMin(xMin); 
        renderer.setXAxisMax(xMax); 
        renderer.setYAxisMin(yMin); 
        renderer.setYAxisMax(yMax); 
        renderer.setAxesColor(axesColor); 
        renderer.setLabelsColor(labelsColor); 
    } 
}
1.我定义了一个线性布局
LinearLayout layout  = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);2.表格布局
TableLayout tableLayout = (TableLayout)findViewById(R.id.tableLayout);
tableLayout.addView(tableRow, new TableLayout.LayoutParams(FP, WC)); 3.一个View 曲线图
View chart = ChartFactory.getLineChartView(this, dataset, renderer);最后
layout.addView(chart, 500, 400);
layout.addView(tableLayout, 500, 400);
setContentView(layout); 最后不能显示，但是表格和曲线视图是可以单独正常显示的，现在要把他们放在一个Activity中，就有问题了
报空指向异常的错误
请高手指点