Android Open Source - OpenCmsMobile-AndroidApp News Fragment

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From Project

Back to project page OpenCmsMobile-AndroidApp.

License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package cz.nelasoft.opencms.mobile;
/*from w w  w.  j  a v a2 s  .co  m*/
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockFragment;

public class NewsFragment extends SherlockFragment implements IRefreshFragment {

  private NewsAdapter mAdapter;
  private ListView lv;
  private String menuId;
  private String subtitle;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    if (container == null)
      return null;

    Bundle arg = getArguments();
    menuId = arg.getString("menuId");
    subtitle = arg.getString("subtitle");

    View view = inflater.inflate(R.layout.news_fragment, container, false);

    TextView textView = (TextView) view.findViewById(R.id.newsFragmentSubtitle);

    if (!TextUtils.isEmpty(subtitle)) {
      textView.setText(subtitle);
    } else {
      textView.setVisibility(View.INVISIBLE);
      textView.setHeight(0);
    }

    mAdapter = new NewsAdapter(getActivity());

    lv = (ListView) view.findViewById(R.id.newslist);
    lv.setAdapter(mAdapter);

    lv.setOnItemClickListener(new ListView.OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
        // Create an Intent that will start the main activity.
        Intent detailIntent = new Intent(getActivity(), NewsDetailActivity.class);
        News content = mAdapter.getData().get(position);

        detailIntent.putExtra("content", content);

        startActivity(detailIntent);

      }
    });

    StructuredContentAsyncTask task = new StructuredContentAsyncTask(getActivity(), menuId);
    task.execute((String[]) null);
    return view;
  }

  private class StructuredContentAsyncTask extends AsyncTask<String, Context, List<News>> {

    private ProgressDialog progressDialog;
    private Context context;
    private String menuId;

    public StructuredContentAsyncTask(Context context, String menuId) {
      this.context = context;
      this.menuId = menuId;
    }

    @Override
    protected void onPreExecute() {
      if (DownloadManager.isContentCached(menuId)) {
        return;
      }

      progressDialog = ProgressDialog.show(context, NewsFragment.this.getString(R.string.loadingData), NewsFragment.this.getString(R.string.wait), true, true);
      progressDialog.setOnCancelListener(new OnCancelListener() {

        public void onCancel(DialogInterface dialog) {
          cancel(false);
        }
      });

      progressDialog.show();
    }

    @Override
    protected List<News> doInBackground(String... params) {
      try {

        String jsonData = null;
        if (DownloadManager.isContentCached(menuId)) {
          jsonData = DownloadManager.getContent(menuId);
        } else {
          jsonData = DownloadManager.connect(menuId);
          DownloadManager.setContent(menuId, jsonData);
        }

        JSONObject json = new JSONObject(jsonData);

        JSONArray data = json.getJSONArray("data");

        ArrayList<News> list = new ArrayList<News>();

        for (int i = 0; i < data.length(); i++) {
          JSONObject sc = data.getJSONObject(i);
          News content = new News();
          content.setMenuId(menuId);
          if (sc.has("Title")) {
            content.setHeadline(sc.getString("Title"));
          }
          // content.setPerex(sc.getString("Text"));
          String image = null;
          if (sc.has("Image")) {
            image = sc.getString("Image");
          }
          if (sc.has("Content")) {
            content.setContent(sc.getString("Content"));
          }
          if (sc.has("Date")) {
            long date = sc.getLong("Date");
            content.setDate(new Date(date));
          }

          if (image != null && image.length() != 0) {
            content.setImagePath(image);
          }
          list.add(content);
        }

        return list;
      } catch (Exception ex) {
        NewsFragment.this.getActivity().runOnUiThread(new Runnable() {

          @Override
          public void run() {
            Toast.makeText(NewsFragment.this.getActivity().getApplicationContext(), R.string.err_download_data, Toast.LENGTH_SHORT).show();
          }
        });

        ex.printStackTrace();
      }

      return null;
    }

    @Override
    protected void onCancelled() {
      if (progressDialog != null && progressDialog.isShowing()) {
        progressDialog.dismiss();
      }
      mAdapter.setData(null);
    }

    @Override
    protected void onPostExecute(List<News> result) {
      if (progressDialog != null && progressDialog.isShowing()) {
        progressDialog.dismiss();
      }
      mAdapter.setData(result);
      mAdapter.notifyDataSetInvalidated();
    }
  }

  @Override
  public void refreshFragment() {
    DownloadManager.cleanCache(menuId);
    StructuredContentAsyncTask task = new StructuredContentAsyncTask(getActivity(), menuId);
    task.execute((String[]) null);
  }
}

Java Source Code List

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