Android Open Source - RSSNewsReaderApp Main Activity

• Back to News/rss  ↑

From Project

Back to project page RSSNewsReaderApp.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.romanostrechlis.rssnews;
/*from  w  w w. j  ava2 s .  co  m*/
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.app.ExpandableListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.ListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;

import com.romanostrechlis.rssnews.auxiliary.DatabaseHandler;
import com.romanostrechlis.rssnews.auxiliary.ExpCustomListAdapter;
import com.romanostrechlis.rssnews.auxiliary.Helper;
import com.romanostrechlis.rssnews.auxiliary.UpdateService;
import com.romanostrechlis.rssnews.content.RssFeed;
import com.romanostrechlis.rssnews.managefeeds.ManageActivity;
import com.romanostrechlis.rssnews.managefeeds.NewFeedsActivity;
import com.romanostrechlis.rssnews.settings.SettingsActivity;

/**
 * List of RSS feeds grouped by category using expandable list view.
 * 
 * @author Romanos Trechlis
 *
 */
public class MainActivity extends Activity {

  private static final String TAG = "MainActivity";
  private ExpandableListView expListView;
  private DatabaseHandler db;
  private ExpCustomListAdapter adapter = null;
  
  List<String> listParents;
  HashMap<String, List<RssFeed>> childItems = new HashMap<String, List<RssFeed>>();

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    expListView = (ExpandableListView) findViewById(R.id.expListView);
    expListView.setGroupIndicator(null);
    expListView.setClickable(true);

    db = DatabaseHandler.getInstance(this);
    Helper.createDB(db, this.getAssets(), this);
    
    setGroupParents();
    setChildData();

    while (!Helper.isConnected(this)) {
      Toast.makeText(this, "You don't have Internet connection!", Toast.LENGTH_LONG).show();
      try {
        Thread.sleep(15000);
      } catch (InterruptedException e) {
        Toast.makeText(this, "Error" + e, Toast.LENGTH_LONG).show();
      }
    }

    // correct implementation with service
    if (!UpdateService.isRunning()) {
      Intent startService = new Intent(this, UpdateService.class);
      // Log.d(TAG, "Starting Service");
      this.startService(startService);
    }
    
    drawExpListOnScreen();
  }
  
  public void drawExpListOnScreen() {

    adapter = new ExpCustomListAdapter(listParents, childItems, this);
    expListView.setAdapter(adapter);
    adapter.notifyDataSetChanged();  
    expListView.setOnChildClickListener(new OnChildClickListener() {

      @Override
      public boolean onChildClick(ExpandableListView parent, View v,
          int groupPosition, int childPosition, long id) {
        RssFeed feed = (RssFeed)adapter.getChild(groupPosition, childPosition);
        // Log.d(TAG, feed.getName());
        Intent intent = new Intent(MainActivity.this, DetailActivity.class);
        intent.putExtra("feedId", feed.getId());
        startActivity(intent);
        return false;
      }
    });
    
    /** When one group is expanded the others are collapsed */
    expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
        int previousItem = -1;

        @Override
        public void onGroupExpand(int groupPosition) {
          Helper.setSavedGroupPosition(groupPosition);
            if(groupPosition != previousItem )
              expListView.collapseGroup(previousItem );
            previousItem = groupPosition;
            // Log.d(TAG, "groupPosition: " + groupPosition);
        }
        
    });

  }

  @Override
  protected void onResume() {
    super.onResume();
    // Log.d(TAG, "onResume, groupPosition: " + Helper.getSavedGroupPostion());
    expListView.expandGroup(Helper.getSavedGroupPostion());
    setGroupParents();
    setChildData();
    adapter.notifyDataSetChanged();
  }

  private void setGroupParents() {
    listParents = db.getCategories();
    // Log.d(TAG, listParents.toString());
  }

  private void setChildData() {
    List<RssFeed> list;
    for (String s : listParents) {
      try {
        list =  db.getEnabledByCategory(s);
        childItems.put(s, list);
        Helper.makeUpdateList(list);
      } catch (NullPointerException e){

      }
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      startActivity(new Intent(this, SettingsActivity.class));
    } else if (id == R.id.add_rssFeed) {
      startActivity(new Intent(this, NewFeedsActivity.class));
    } else if (id == R.id.manage_rss) {
      startActivity(new Intent(this, ManageActivity.class));
    } else if (id == R.id.update) {
      Helper.downloadContent(db, getApplicationContext());
      adapter.notifyDataSetChanged();
    }
    return super.onOptionsItemSelected(item);
  }

}

Java Source Code List

• Back to News/rss  ↑