Android Open Source - tum-campus Feeds

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License

The source code is released under:
GNU General Public License
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Java Source Code

?package de.tum.in.tumcampus;
/*from   www .  jav a  2  s .co m*/
import static de.tum.in.tumcampus.services.DownloadService.broadcast;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.SimpleCursorAdapter.ViewBinder;
import android.widget.SlidingDrawer;
import android.widget.Toast;
import de.tum.in.tumcampus.models.Feed;
import de.tum.in.tumcampus.models.FeedItemManager;
import de.tum.in.tumcampus.models.FeedManager;
import de.tum.in.tumcampus.services.DownloadService;

/**
 * Activity to show RSS-feeds and their news items
 */
public class Feeds extends Activity implements OnItemClickListener, ViewBinder, OnItemLongClickListener,
    View.OnClickListener {

  /**
   * Current selected feed (ID)
   */
  private static String feedId;

  /**
   * Current selected feed (Name)
   */
  private static String feedName;

  /**
   * Adapter for feed list
   */
  private SimpleCursorAdapter adapter;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.feeds);

    if (feedId == null) {
      SlidingDrawer sd = (SlidingDrawer) findViewById(R.id.slider);
      sd.open();
    }

    // get all feeds
    FeedManager fm = new FeedManager(this);
    Cursor c = fm.getAllFromDb();

    adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, c, c.getColumnNames(),
        new int[] { android.R.id.text1 });

    // add a footer to the list for adding new feeds
    View view = getLayoutInflater().inflate(R.layout.feeds_footer, null, false);

    ListView lv = (ListView) findViewById(R.id.listView);
    lv.addFooterView(view);
    lv.setAdapter(adapter);
    lv.setOnItemClickListener(this);
    lv.setOnItemLongClickListener(this);

    Button save = (Button) view.findViewById(R.id.save);
    save.setOnClickListener(this);

    registerReceiver(DownloadService.receiver, new IntentFilter(broadcast));
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    unregisterReceiver(DownloadService.receiver);
  }

  @Override
  protected void onResume() {
    super.onResume();

    // refresh current selected feed on resume (finished download)
    if (feedId != null) {
      ListView lv = (ListView) findViewById(R.id.listView);
      onItemClick(lv, lv, -1, 0);
    }

    // reset new items counter
    FeedManager.lastInserted = 0;
    FeedItemManager.lastInserted = 0;
  }

  @Override
  public void onItemClick(AdapterView<?> av, View v, int position, long id) {

    // click on feed item in list, open URL in browser
    if (av.getId() == R.id.listView2) {
      Cursor c = (Cursor) av.getAdapter().getItem(position);
      String link = c.getString(c.getColumnIndex("link"));

      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(link));
      startActivity(intent);
      return;
    }

    SlidingDrawer sd = (SlidingDrawer) findViewById(R.id.slider);
    if (sd.isOpened()) {
      sd.animateClose();
    }

    // click on feed in list
    if (position != -1) {
      Cursor c = (Cursor) av.getAdapter().getItem(position);
      feedId = c.getString(c.getColumnIndex("_id"));
      feedName = c.getString(c.getColumnIndex("name"));
    }

    setTitle("Nachrichten: " + feedName);

    // get all feed items for a feed
    FeedItemManager fim = new FeedItemManager(this);
    Cursor c2 = fim.getAllFromDb(feedId);

    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.feeds_listview, c2, c2.getColumnNames(),
        new int[] { R.id.icon, R.id.title, R.id.description });

    adapter.setViewBinder(this);
    ListView lv2 = (ListView) findViewById(R.id.listView2);
    lv2.setAdapter(adapter);
    lv2.setOnItemClickListener(this);
  }

  @Override
  public boolean setViewValue(View view, Cursor cursor, int index) {
    // hide empty view elements (e.g. missing image or description)
    if (cursor.getString(index).length() == 0) {
      view.setVisibility(View.GONE);

      // no binding needed
      return true;
    }
    view.setVisibility(View.VISIBLE);
    return false;
  }

  @Override
  public boolean onItemLongClick(final AdapterView<?> av, View v, final int position, long id) {
    if (id == -1) {
      return false;
    }

    // confirm delete
    DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {

      @Override
      public void onClick(DialogInterface dialog, int id) {

        // delete feed from list, refresh feed list
        Cursor c = (Cursor) av.getAdapter().getItem(position);
        int _id = c.getInt(c.getColumnIndex("_id"));

        FeedManager fm = new FeedManager(av.getContext());
        fm.deleteFromDb(_id);
        adapter.changeCursor(fm.getAllFromDb());
      }
    };
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Wirklch lschen?");
    builder.setPositiveButton("Ja", listener);
    builder.setNegativeButton("Nein", null);
    builder.show();
    return false;
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    MenuItem m = menu.add(0, Menu.FIRST, 0, "Aktualisieren");
    m.setIcon(R.drawable.ic_menu_refresh);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // download latest feed items
    Intent service = new Intent(this, DownloadService.class);
    service.putExtra("action", "feeds");
    startService(service);
    return true;
  }

  @Override
  public void onClick(View v) {
    // add a new feed
    EditText editName = (EditText) findViewById(R.id.name);
    EditText editUrl = (EditText) findViewById(R.id.url);

    String name = editName.getText().toString();
    String url = editUrl.getText().toString();

    // prepend http:// if needed
    if (url.length() > 0 && !url.contains(":")) {
      url = "http://" + url;
    }
    FeedManager fm = new FeedManager(this);
    try {
      Feed feed = new Feed(name, url);
      fm.insertUpdateIntoDb(feed);
    } catch (Exception e) {
      Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
    }

    // refresh feed list
    adapter.changeCursor(fm.getAllFromDb());

    // clear form
    editName.setText("");
    editUrl.setText("");
  }
}
Java Source Code List
