Android Open Source - pawang-ujan Gempa Fragment

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License

The source code is released under:
Apache License
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Java Source Code

package com.salatiga.code;
//from   ww w.  j av a2s  .  c  o m
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParserException;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;

/**
 * Class ini adalah tampilan untuk tab gempa
 * 
 * @author Hendro Steven Tampake
 * @version 1.0
 * 
 */
public class GempaFragment extends Fragment {

  private static final String URL = "http://data.bmkg.go.id/gempadirasakan.xml";
  // private static final String URL =
  // "http://data.bmkg.go.id/gempaterkini.xml";

  private ListView listGempa;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.gempa, container, false);
    return rootView;
  }

  @Override
  public void onStart() {
    super.onStart();
    loadPage();
    listGempa = (ListView) getView().findViewById(R.id.listGempa);
    listGempa.setOnItemClickListener(new AdapterView.OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView<?> parent, final View view,
          int position, long id) {
        final Gempa itemGempa = (Gempa) parent
            .getItemAtPosition(position);
        Intent mapActivity = new Intent(getView().getContext(),
            MapActivity.class);
        mapActivity.putExtra("tanggal", itemGempa.getTanggal());
        mapActivity.putExtra("latitude", itemGempa.getLatitude());
        mapActivity.putExtra("longitude", itemGempa.getLongitude());
        mapActivity.putExtra("magnitude", itemGempa.getMagnitude());
        mapActivity.putExtra("kedalaman", itemGempa.getKedalaman());
        mapActivity.putExtra("description", itemGempa.getKeterangan());
        mapActivity.putExtra("dirasakan", itemGempa.getDirasakan());
        startActivity(mapActivity);
      }

    });
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
  }

  public void loadPage() {
    if (((MainActivity.sPref.equals(MainActivity.ANY)) && (MainActivity.wifiConnected || MainActivity.mobileConnected))
        || ((MainActivity.sPref.equals(MainActivity.WIFI)) && (MainActivity.wifiConnected))) {
      // AsyncTask subclass
      new DownloadXmlTask().execute(URL);
    }
  }

  // Implementation of AsyncTask used to download XML feed from
  // stackoverflow.com.
  private class DownloadXmlTask extends AsyncTask<String, Void, List<Gempa>> {

    protected ProgressBar progress;

    @Override
    protected void onPreExecute() {
      super.onPreExecute();
      progress = (ProgressBar) getView().findViewById(R.id.progressBar);
      progress.setVisibility(View.VISIBLE);
    }

    @Override
    protected List<Gempa> doInBackground(String... urls) {
      try {
        return loadXmlFromNetwork(urls[0]);
      } catch (IOException e) {
        return new ArrayList<Gempa>();
      } catch (XmlPullParserException e) {
        return new ArrayList<Gempa>();
      }
    }

    @Override
    protected void onPostExecute(List<Gempa> result) {

      listGempa.setAdapter(new GempaListAdapter(getView().getContext(),
          result));
      progress.setVisibility(View.INVISIBLE);
      
    }
  }

  private List<Gempa> loadXmlFromNetwork(String urlString)
      throws XmlPullParserException, IOException {
    InputStream stream = null;
    GempaXmlParser gempaParser = new GempaXmlParser();
    List<Gempa> gempas = null;

    try {
      stream = downloadUrl(urlString);
      gempas = gempaParser.parse(stream);      
    } finally {
      if (stream != null) {
        stream.close();
      }
    }

    return gempas;
  }

  // Given a string representation of a URL, sets up a connection and gets
  // an input stream.
  private InputStream downloadUrl(String urlString) throws IOException {
    URL url = new URL(urlString);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setReadTimeout(10000 /* milliseconds */);
    conn.setConnectTimeout(15000 /* milliseconds */);
    conn.setRequestMethod("GET");
    conn.setDoInput(true);
    // Starts the query
    conn.connect();
    InputStream stream = conn.getInputStream();
    return stream;
  }
}
Java Source Code List
