CODEWITHSUNDEEP
androidandroid-asynctaskremoteexception
Paritosh
Paritosh

Reputation: 367

Handle remote exception in Asynctask

Here's the Asynctask method:

public class Read extends AsyncTask<String, Integer, String> {
    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
    }

    @Override
    protected String doInBackground(String... params) {
        // TODO Auto-generated method stub
        try {
            sUrl = sUrl.trim();
            json = lastTweet(sUrl);
            return json.getString(params[0]);
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        // TODO Auto-generated method stub 
    }

}

And related lastTweet method:

public JSONObject lastTweet(String username)
        throws ClientProtocolException, IOException, JSONException {
    HttpGet get = new HttpGet(url.toString());
    HttpResponse r = client.execute(get);
    int status = r.getStatusLine().getStatusCode();
    if (status == 200) {
        HttpEntity e = r.getEntity();
        String data = EntityUtils.toString(e);
        JSONArray timeline = new JSONArray(data);
        JSONObject last = timeline.getJSONObject(0);
        return last;
    }
}

All of this code is working fine. No issues as of now. However, there's minor tinkering I want to do. As and when the connectivity is lost during HTTP transmission, a RemoteException is thrown and app crashes.

I tried to handle exception within Async method but not able to do so.

Any way to handle such an exception?

Upvotes: 1

Views: 355

Answers (1)

Tarsem Singh
Tarsem Singh

Reputation: 14199

you can check network connectivity before executing your Read AsyncTask

1. check Connection

if(ifConnectionIsAvailable)
    new Read().execute();

2. set Connection Time Out

HttpGet get = new HttpGet(url.toString());
HttpParams httpParameters = new BasicHttpParams();
int timeoutConnection = 3000;// in milliseconds 
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
int timeoutSocket = 5000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
HttpResponse r = httpClient.execute(get);

Upvotes: 1

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