Question

i can’t figure out how to retrieve a value from a GetLogin class i have that extends AsyncTask. Here’s my code:

public class GetLogin extends AsyncTask<String, Void, String> {

private final HttpClient httpclient = new DefaultHttpClient();

final HttpParams params = httpclient.getParams();
HttpResponse response;
private String content =  null;
private Context mContext;

public GetLogin(Context context){

    this.mContext = context;

}

protected String doInBackground(String... urls) {

    String result = null;

    try {

        DefaultHttpClient httpClient=new DefaultHttpClient();

        Log.e("Tag", "url: " + urls[0]);

        //Connect to the server
        HttpGet httpGet = new HttpGet(urls[0].toString());

        //Get the response
        HttpResponse httpResponse = httpClient.execute(httpGet);
        HttpEntity httpEntity = httpResponse.getEntity();
        InputStream stream = httpEntity.getContent();

        //Convert the stream to readable format
        result = convertStreamToString(stream);
        Log.e("Tag", "Result: " + result);

        if (result.charAt(1)=='1') {
            return "Login Successful";
        } if (result.charAt(1)=='0') {
            return "Login Failed";
        } else {
            return result.toString();
        }

  //  } catch (ClientProtocolException e) {
  //      Log.w("HTTP2:",e );
 //       content = e.getMessage();
  //      cancel(true);
  //      return "Could not connect to Server";
   //     
   // } catch (IOException e) {
   //     Log.w("HTTP3:",e );
   //     content = e.getMessage();
   //     cancel(true);
   //     return "Could not connect to Server";

    }catch (Exception e) {
        Log.w("HTTP4:",e );
        content = e.getMessage();
        cancel(true);
        return "Could not connect to Server";
    }
}

public static String convertStreamToString(InputStream is) 
{
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } 
    catch (IOException e) {
        e.printStackTrace();
    } 
    finally {
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}

}

Here’s the code for Login Activity

    String url = "http://192.168.1.107:6972/evalservice/checkLogin?name="+tvUsername.getText()+"&pass="+tvPassword.getText();
    new GetLogin(LoginActivity.this).execute(url);

what i would like to do is put an if statement to see if login was successfull and if so, proceed to the next activity

Answer 1

what i would like to do is put an if statement to see if login was successfull and if so, proceed to the next activity

Whatever you return from doInBackground(...) is passed to the onPostExecute(...) method of an AsyncTask. Simply check the result in that method and, if successful, have it start the next Activity and finish() the current one.