content: package com.kure.musicplayer.activities;
  
  import java.util.ArrayList;
  
  import android.app.ActionBar;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.AdapterView;
  import android.widget.AdapterView.OnItemClickListener;
  import android.widget.ArrayAdapter;
  import android.widget.ListView;
  
  import com.kure.musicplayer.R;
  import com.kure.musicplayer.kMP;
  
  
  /**
   * Shows a list of albums from a specified artist.
   */
  public class ActivityListAlbums extends ActivityMaster
  	implements OnItemClickListener {
  
  	/**
  	 * List of songs that will be shown to the user.
  	 */
  	private ListView songListView;
  
  	/**
  	 * Raw items that will be shown on ListView.
  	 */
  	private ArrayList<String> items;
  
  	private String currentArtist;
  
  	@Override
  	protected void onCreate(Bundle tableSex) {
  		super.onCreate(tableSex);
  
  		setContentView(R.layout.activity_list_songs);
  
  		songListView = (ListView)findViewById(R.id.activity_list_songs_list);
  
  		// We expect an extra with the artist name
  		Intent intent = getIntent();
  		Bundle bundle = intent.getExtras();
  
  		if (bundle == null)
  			throw new RuntimeException("Expected Artist Name");
  
  		// This is the artist that we'll display the albums.
  		currentArtist = (String)bundle.get("artist");
  
  		if (currentArtist == null || currentArtist.isEmpty())
  			throw new RuntimeException("Expected Artist Name");
  
  		this.setTitle(currentArtist);
  
  		// Connects the song list to an adapter
  		// (thing that creates several Layouts from the song list)
  		items = kMP.songs.getAlbumsByArtist(currentArtist);
  
  		// Let's prepend all the albums with this label.
  		// Then, when selecting the item, we'll need to
  		// subtract one.
  		items.add(0, getString(R.string.all_songs));
  
  		// Adapter that will convert from Strings to List Items
  		final ArrayAdapter<String> adapter = new ArrayAdapter<String>
  		(this, android.R.layout.simple_list_item_1, items);
  
  		// Filling teh list with all the items
  		songListView.setAdapter(adapter);
  
  		songListView.setOnItemClickListener(this);
  
  		// This enables the "Up" button on the top Action Bar
  		// Note that it returns to the parent Activity, specified
  		// on `AndroidManifest`
  		ActionBar actionBar = getActionBar();
  		actionBar.setDisplayHomeAsUpEnabled(true);
  	}
  
  	/**
  	 * Will react to the user selecting an item.
  	 */
  	@Override
  	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
  
  		// We can only handle the user choice from now on
  		// if we've successfully scanned the songs from the
  		// device.
  		if (! kMP.songs.isInitialized())
  			return;
  
  		// Let's switch to a song list.
  		Intent intent = new Intent(this, ActivityListSongs.class);
  
  		// This is the special case - the user selected "All Albums".
  		// We'll show all songs from this artist, then.
  		if (position == 0) {
  			kMP.musicList = kMP.songs.getSongsByArtist(currentArtist);
  
  			intent.putExtra("title", currentArtist);
  		}
  		// Regular case, user selected a specific album.
  		// Show all songs from that album.
  		else {
  			String selectedAlbum = items.get(position);
  
  			kMP.musicList = kMP.songs.getSongsByAlbum(selectedAlbum);
  
  			intent.putExtra("title", selectedAlbum);
  		}
  		startActivity(intent);
  	}
  }
  