| package com.example.scannrmobile; | |
| import android.os.AsyncTask; | |
| import org.apache.http.client.methods.*; | |
| import java.io.BufferedReader; | |
| import java.io.InputStreamReader; | |
| import org.apache.http.HttpResponse; | |
| import org.apache.http.client.HttpClient; | |
| import org.apache.http.impl.client.DefaultHttpClient; | |
| import org.json.*; | |
| import android.util.Log; | |
| //http://www.accella.net/android-http-get-json/ | |
| public class HttpTask extends AsyncTask<HttpUriRequest,Void,JSONArray> { | |
| private static final String TAG = "Scannr_HTTP_TASK"; | |
| @Override | |
| protected JSONArray doInBackground(HttpUriRequest...params) { | |
| // Performed on Background Thread | |
| HttpUriRequest request = params[0]; | |
| HttpClient client = new DefaultHttpClient(); | |
| try { | |
| // The UI Thread shouldn't be blocked long enough to do the reading in of the stream. | |
| HttpResponse response = client.execute(request); | |
| // TODO handle bad response codes (such as 404, etc) | |
| BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8")); | |
| StringBuilder builder = new StringBuilder(); | |
| for (String line = null; (line = reader.readLine()) != null; ) { | |
| builder.append(line).append("\n"); | |
| } | |
| JSONTokener tokener = new JSONTokener(builder.toString()); | |
| JSONArray json = new JSONArray(tokener); | |
| return json; | |
| } catch (Exception e) { | |
| // TODO handle different exception cases | |
| Log.e(TAG,e.toString()); | |
| e.printStackTrace(); | |
| return null; | |
| } | |
| } | |
| @Override | |
| protected void onPostExecute(JSONArray json) { | |
| // Done on UI Thread | |
| if(json != null) { | |
| taskHandler.taskSuccessful(json); | |
| } else { | |
| taskHandler.taskFailed(); | |
| } | |
| } | |
| public static interface HttpTaskHandler { | |
| void taskSuccessful(JSONArray json); | |
| void taskFailed(); | |
| } | |
| HttpTaskHandler taskHandler; | |
| public void setTaskHandler(HttpTaskHandler taskHandler) { | |
| this.taskHandler = taskHandler; | |
| } | |
| } |