[android help] Update the Activity based on what item is selected in the Spinner

In the current Activity I'm printing a graph (using Androidplot) of the closing prices of a selected stock from the previous activity.
In this activity I have a spinner of a list of indicators the user can overlay.
Now I want the graph to be redrawn with this new selection from the spinner.
I did try refreshing/reloading the page onItemSelected but that causes the page to keep refreshing even without waiting for a user input.

public class DispGraph extends Activity {

private XYPlot plotstock;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.graph);

    // PRINTING SELECTED STOCK_NAME

    Bundle bundle = getIntent().getExtras();
    String sname = bundle.getString("SN");
    TextView t = (TextView) findViewById(R.id.textView1);
    t.setText(sname);

    // INDICATOR LIST

    Spinner spinner = (Spinner) findViewById(R.id.spinner1);
    ArrayAdapter adapter = ArrayAdapter.createFromResource(
            this, R.array.Indicators, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
    String iname = spinner.getSelectedItem().toString();
    spinner.setOnItemSelectedListener(new OnItemSelectedListener(){

        @Override
        public void onItemSelected(AdapterView arg0, View arg1,
                int arg2, long arg3) {
            // TODO Auto-generated method stub
            startActivity(getIntent());
        }

        @Override
        public void onNothingSelected(AdapterView arg0) {
            // TODO Auto-generated method stub

        }});

    //PASSING STOCK-TICKER & INDICATOR TO PHP



    // PLOTTING GRAPH

    plotstock = (XYPlot) findViewById(R.id.mySimpleXYPlot);
    Number[] series1Numbers = ind;
    Number[] series2Numbers = closing;

    XYSeries series1 = new SimpleXYSeries(Arrays.asList(series1Numbers),SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, iname);
    XYSeries series2 = new SimpleXYSeries(Arrays.asList(series2Numbers),SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Closing Price");

    plotstock.setDomainLabel("Date");
    plotstock.setRangeLabel("Price");

    plotstock.addSeries(series1,new LineAndPointFormatter(Color.rgb(0, 200, 0), Color.rgb(0,100, 0), null, new PointLabelFormatter(Color.TRANSPARENT)));
    plotstock.addSeries(series2,new LineAndPointFormatter(Color.rgb(0, 0, 200), Color.rgb(0, 0, 100),null, new PointLabelFormatter(Color.TRANSPARENT)));

    plotstock.setTicksPerRangeLabel(2);

}
}

.

stackoverflow.comm