AndroidPlot instructions are ignored after JSON task

Question

(Sorry put too much code but if i didnt, it would make things harder to explain) anyways, I made an instruction to get some data from mysql database:

//asynctask
private class JsonReadTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... params) {
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();


        nameValuePairs.add(new BasicNameValuePair("fro", fr));
        nameValuePairs.add(new BasicNameValuePair("too",to));
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(params[0]);
        try {
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = httpclient.execute(httppost);
            jsonResult = inputStreamToString(
                    response.getEntity().getContent()).toString();
        }

        catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    private StringBuilder inputStreamToString(InputStream is) {
        String rLine = "";
        StringBuilder answer = new StringBuilder();
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));

        try {
            while ((rLine = rd.readLine()) != null) {
                answer.append(rLine);
            }
        }

        catch (IOException e) {
            // e.printStackTrace();
            Toast.makeText(getApplicationContext(),
                    "Error..." + e.toString(), Toast.LENGTH_LONG).show();
        }
        return answer;
    }

    @Override
    protected void onPostExecute(String result) {

        try {
            JSONObject jsonResponse = new JSONObject(jsonResult);
            JSONArray jsonMainNode = jsonResponse.optJSONArray("energystatistic");

            for (int i = 0; i < jsonMainNode.length(); i++) {
                JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
                String kwh = jsonChildNode.optString("kwh");
                s1 = addElement(s1, Integer.parseInt(kwh));
            }

        } catch (JSONException e) {
            Toast.makeText(getApplicationContext(), "Error" + e.toString(), Toast.LENGTH_SHORT).show();
        }


        Toast.makeText(Plot.this, "Begin plot: " + String.valueOf(s1.length) + " Entries", Toast.LENGTH_SHORT).show();

        // Turn the above arrays into XYSeries':
        XYSeries series1 = new SimpleXYSeries(Arrays.asList(s1), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,"Series1");

        LineAndPointFormatter series1Format = new LineAndPointFormatter(Color.RED, Color.GREEN, Color.BLUE, null);
        // add a new series' to the xyplot:
        plot.addSeries(series1, series1Format);
        // reduce the number of range labels
        plot.setTicksPerRangeLabel(3);
        plot.getGraphWidget().setDomainLabelOrientation(-45);

        Toast.makeText(Plot.this, "Plotted", Toast.LENGTH_SHORT).show();

    }
}
// end async task

The problem here is that the following code gets ignored or something:

// Turn the above arrays into XYSeries':
XYSeries series1 = new SimpleXYSeries(Arrays.asList(s1),SimpleXYSeries.ArrayFormat.Y_VALS_ONLY,"Series1");
LineAndPointFormatter series1Format = new LineAndPointFormatter(Color.RED, Color.GREEN, Color.BLUE, null);

// add a new series' to the xyplot:
plot.addSeries(series1, series1Format);

// reduce the number of range labels
plot.setTicksPerRangeLabel(3);
plot.getGraphWidget().setDomainLabelOrientation(-45);

I ran a debugger to check out those lines and the program does run them but the graph seems to be unaffected. The graph stays empty and i cant understand why. Would i need to run this using a different method?

if i put it in the onCreate method, the graph shows some changes but the points still dont get plotted at all. the array s1[] does have data after getting info from database through JSon (all int numbers).

Answer 1

Try calling plot.redraw() after you finished modifying your plot.