// Getting a reference to LinearLayout of the MainActivity Layout
 chartContainer = (LinearLayout) findViewById(R.id.chart_container);

// Creating a Line Chart
    mChart = (GraphicalView) ChartFactory.getLineChartView(getBaseContext(), dataset, multiRenderer);


   // Adding the Line Chart to the LinearLayout
    chartContainer.addView(mChart);

bitmap1 = Bitmap.createBitmap(mChart.getDrawingCache());