Android Open Source - android-ocw Get Provider List Task

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License

The source code is released under:

GNU General Public License

Java Source Code

package app.ocw.task;
/*  www  .j  a  va2  s  .c o m*/
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.util.Log;
import app.ocw.api.ProviderListAPI;
import app.ocw.model.Provider;

/**
 * An async task for getting a list of providers from the OCW data API.
 * It will only use the first string in the ellipsis array. The background
 * thread will return NULL for a failed query.
 * 
 * @author Nick Ferraro
 *
 */
public abstract class GetProviderListTask extends AsyncTask<String, Integer, List<Provider>> implements ProviderListAPI {
  @Override
  protected final List<Provider> doInBackground(String... params) {
    List<Provider> providers = new ArrayList<Provider>();
    
    if(params != null && params.length > 0) {
      String url = params[0];
      
      try {
        // Create our client, our request, and get our response
        HttpClient client = new DefaultHttpClient();
        HttpGet getProviderList = new HttpGet(url);
        HttpResponse providerListResponse = client.execute(getProviderList);
        
        // Parse our response into a list of Provider objects
        JSONArray providerListArray = new JSONArray(EntityUtils.toString(providerListResponse.getEntity()));
        for( int i = 0; i < providerListArray.length(); ++i ) {
          JSONObject providerObject = providerListArray.getJSONObject(i);
          Provider parsedProvider = new Provider(providerObject.getInt(KEY_ID), providerObject.getString(KEY_NAME), providerObject.getString(KEY_EXTERNAL_ID));
          providers.add(parsedProvider);
        }
      } catch(Exception e) {
        Log.e("GetProviderListTask", e.getMessage());
        return null;
      }
    }
    
    return providers;
  }
}

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