AlbumList.java

package org.droidklavier.activity;

import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import org.droidklavier.Droidklavier;
import org.droidklavier.R;
import org.droidklavier.db.Album;

import java.util.ArrayList;
import java.util.Locale;

public class AlbumList extends ListActivity {

  private Droidklavier mDroidklavier;
  private ArrayList<Album> mAlbumList;
  private Album mAlbum;
  private String mSource;
  private ProgressDialog mLoadingDialog;

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

    String source = getIntent().getStringExtra(Player.SOURCE);
    String keyword = getIntent().getStringExtra(Player.KEYWORD);
    mDroidklavier = (Droidklavier) getApplication();

    setTitle(buildTitle(source, keyword));

    mLoadingDialog = new ProgressDialog(this);
    mLoadingDialog.setMessage(getString(R.string.loading));
    mLoadingDialog.show();

    new AlbumListTask().execute(source);

    getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> av, View v, int pos, long id) {
        startSongListActivity((int) id);
      }
    });
  }

  private CharSequence buildTitle(String source, String keyword) {
    String title;
    if (keyword != null && keyword.length() > 0) {
      title = String.format("Results for '%s'", keyword);
    } else {
      title = String.format("Albums from: %s", source.toUpperCase(Locale.getDefault()));
    }
    return title;
  }

  @Override
  protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
  }

  private void startSongListActivity(int id) {
    mAlbum = mAlbumList.get(id);
    mSource = mAlbum.source;
    Intent intent = new Intent(this, SongList.class);
    intent.putExtra(Player.SOURCE, mSource);
    intent.putExtra(Player.ALBUM, mAlbum);
    startActivityForResult(intent, Player.SONG_LIST);
  }

  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
      case Player.SONG_LIST:
        if (resultCode == Activity.RESULT_OK) {
          Intent intent = new Intent();
          intent.putExtra(Player.SOURCE, mSource);
          intent.putExtra(Player.ALBUM, mAlbum);
          intent.putExtra(Player.SONG,
              data.getParcelableExtra(Player.SONG));
          setResult(Activity.RESULT_OK, intent);
          finish();
        }
        break;
    }
  }

  private class AlbumListAdapter extends ArrayAdapter<Album> {

    private ArrayList<Album> items;

    public AlbumListAdapter(Context context, int textViewResourceId, ArrayList<Album> items) {
      super(context, textViewResourceId, items);
      this.items = items;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      View v = convertView;
      if (v == null) {
        LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.album_list_item, null);
      }
      Album album = items.get(position);
      if (album != null) {
        TextView album_title = (TextView) v.findViewById(R.id.album_title);
        TextView album_source = (TextView) v.findViewById(R.id.album_source);
        if (album_title != null) {
          album_title.setText(album.title);
        }
        if (album_source != null) {
          album_source.setText("Source: " + album.source);
        }
      }
      return v;
    }
  }

  private class AlbumListTask extends AsyncTask<String, Void, ArrayList<Album>> {

      @Override
      protected ArrayList<Album> doInBackground(String... params) {
        ArrayList<Album> albumList = mDroidklavier.getDAO().getAlbumList(params[0]);
        return albumList;
      }

      @Override
      protected void onPostExecute(ArrayList<Album> result) {
        super.onPostExecute(result);
        if (result != null) {
          mAlbumList = result;
          setListAdapter(new AlbumListAdapter(AlbumList.this, R.layout.album_list_item, mAlbumList));
        }
        if (mLoadingDialog != null) {
          mLoadingDialog.dismiss();
        }
      }
    }
}