Android Open Source - vanilindy Playlist Activity

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright (C) 2012 Christopher Eby <kreed@kreed.org>
 */*from  w w  w  .  ja  v a 2  s  . c  o m*/
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package ch.blinkenlights.android.vanilla;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.HandlerThread;
import android.os.Looper;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Button;

/**
 * The playlist activity where playlist songs can be viewed and reordered.
 */
public class PlaylistActivity extends Activity
  implements View.OnClickListener
           , AbsListView.OnItemClickListener
           , DialogInterface.OnClickListener
{
  /**
   * The SongTimeline play mode corresponding to each
   * LibraryActivity.ACTION_*
   */
  private static final int[] MODE_FOR_ACTION =
    { SongTimeline.MODE_PLAY, SongTimeline.MODE_ENQUEUE, -1,
      SongTimeline.MODE_PLAY_POS_FIRST, SongTimeline.MODE_ENQUEUE_POS_FIRST };

  /**
   * An event loop running on a worker thread.
   */
  private Looper mLooper;
  private DragListView mListView;
  private PlaylistAdapter mAdapter;

  /**
   * The id of the playlist this activity is currently viewing.
   */
  private long mPlaylistId;
  /**
   * The name of the playlist this activity is currently viewing.
   */
  private String mPlaylistName;
  /**
   * If true, then playlists songs can be dragged to reorder.
   */
  private boolean mEditing;

  /**
   * The item click action specified in the preferences.
   */
  private int mDefaultAction;
  /**
   * The last action used from the context menu, used to implement
   * LAST_USED_ACTION action.
   */
  private int mLastAction = LibraryActivity.ACTION_PLAY;

  private Button mEditButton;
  private Button mDeleteButton;

  @Override
  public void onCreate(Bundle state)
  {
    super.onCreate(state);

    HandlerThread thread = new HandlerThread(getClass().getName());
    thread.start();

    setContentView(R.layout.playlist_activity);

    DragListView view = (DragListView)findViewById(R.id.list);
    view.setOnItemClickListener(this);
    view.setOnCreateContextMenuListener(this);
    mListView = view;

    View header = LayoutInflater.from(this).inflate(R.layout.playlist_buttons, null);
    mEditButton = (Button)header.findViewById(R.id.edit);
    mEditButton.setOnClickListener(this);
    mDeleteButton = (Button)header.findViewById(R.id.delete);
    mDeleteButton.setOnClickListener(this);
    view.addHeaderView(header, null, false);

    mLooper = thread.getLooper();
    mAdapter = new PlaylistAdapter(this, mLooper);
    view.setAdapter(mAdapter);

    onNewIntent(getIntent());
  }

  @Override
  public void onStart()
  {
    super.onStart();
    SharedPreferences settings = PlaybackService.getSettings(this);
    mDefaultAction = Integer.parseInt(settings.getString(PrefKeys.DEFAULT_PLAYLIST_ACTION, "0"));
  }

  @Override
  public void onDestroy()
  {
    mLooper.quit();
    super.onDestroy();
  }

  @Override
  public void onNewIntent(Intent intent)
  {
    long id = intent.getLongExtra("playlist", 0);
    String title = intent.getStringExtra("title");
    mAdapter.setPlaylistId(id);
    setTitle(title);
    mPlaylistId = id;
    mPlaylistName = title;
  }

  /**
   * Enable or disable edit mode, which allows songs to be reordered and
   * removed.
   *
   * @param editing True to enable edit mode.
   */
  public void setEditing(boolean editing)
  {
    mListView.setEditable(editing);
    mAdapter.setEditable(editing);
    int visible = editing ? View.GONE : View.VISIBLE;
    mDeleteButton.setVisibility(visible);
    mEditButton.setText(editing ? R.string.done : R.string.edit);
    mEditing = editing;
  }

  @Override
  public void onClick(View view)
  {
    switch (view.getId()) {
    case R.id.edit:
      setEditing(!mEditing);
      break;
    case R.id.delete: {
      AlertDialog.Builder builder = new AlertDialog.Builder(this);
      String message = getResources().getString(R.string.delete_playlist, mPlaylistName);
      builder.setMessage(message);
      builder.setPositiveButton(R.string.delete, this);
      builder.setNegativeButton(R.string.cancel, this);
      builder.show();
      break;
    }
    }
  }

  private static final int MENU_PLAY = LibraryActivity.ACTION_PLAY;
  private static final int MENU_PLAY_ALL = LibraryActivity.ACTION_PLAY_ALL;
  private static final int MENU_ENQUEUE = LibraryActivity.ACTION_ENQUEUE;
  private static final int MENU_ENQUEUE_ALL = LibraryActivity.ACTION_ENQUEUE_ALL;
  private static final int MENU_REMOVE = -1;

  @Override
  public void onCreateContextMenu(ContextMenu menu, View listView, ContextMenu.ContextMenuInfo absInfo)
  {
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo)absInfo;
    Intent intent = new Intent();
    intent.putExtra("id", info.id);
    intent.putExtra("position", info.position);
    intent.putExtra("audioId", (Long)info.targetView.getTag());

    menu.add(0, MENU_PLAY, 0, R.string.play).setIntent(intent);
    menu.add(0, MENU_PLAY_ALL, 0, R.string.play_all).setIntent(intent);
    menu.add(0, MENU_ENQUEUE, 0, R.string.enqueue).setIntent(intent);
    menu.add(0, MENU_ENQUEUE_ALL, 0, R.string.enqueue_all).setIntent(intent);
    menu.add(0, MENU_REMOVE, 0, R.string.remove).setIntent(intent);
  }

  @Override
  public boolean onContextItemSelected(MenuItem item)
  {
    int itemId = item.getItemId();
    Intent intent = item.getIntent();
    int pos = intent.getIntExtra("position", -1);

    if (itemId == MENU_REMOVE) {
      mAdapter.remove(pos - mListView.getHeaderViewsCount());
    } else {
      performAction(itemId, pos, intent.getLongExtra("audioId", -1));
    }

    return true;
  }

  /**
   * Perform the specified action on the adapter row with the given id and
   * position.
   *
   * @param action One of LibraryActivity.ACTION_*.
   * @param position The position in the adapter.
   * @param audioId The id of the selected song, for PLAY/ENQUEUE.
   */
  private void performAction(int action, int position, long audioId)
  {
    if (action == LibraryActivity.ACTION_LAST_USED)
      action = mLastAction;

    switch (action) {
    case LibraryActivity.ACTION_PLAY:
    case LibraryActivity.ACTION_ENQUEUE: {
      QueryTask query = MediaUtils.buildQuery(MediaUtils.TYPE_SONG, audioId, Song.FILLED_PROJECTION, null);
      query.mode = MODE_FOR_ACTION[action];
      PlaybackService.get(this).addSongs(query);
      break;
    }
    case LibraryActivity.ACTION_PLAY_ALL:
    case LibraryActivity.ACTION_ENQUEUE_ALL: {
      QueryTask query = MediaUtils.buildPlaylistQuery(mPlaylistId, Song.FILLED_PLAYLIST_PROJECTION, null);
      query.mode = MODE_FOR_ACTION[action];
      query.data = position - mListView.getHeaderViewsCount();
      PlaybackService.get(this).addSongs(query);
      break;
    }
    }

    mLastAction = action;
  }

  @Override
  public void onItemClick(AdapterView<?> adapterView, View view, int position, long id)
  {
    if (!mEditing && mDefaultAction != LibraryActivity.ACTION_DO_NOTHING) {
      performAction(mDefaultAction, position, (Long)view.getTag());
    }
  }

  @Override
  public void onClick(DialogInterface dialog, int which)
  {
    if (which == DialogInterface.BUTTON_POSITIVE) {
      Playlist.deletePlaylist(getContentResolver(), mPlaylistId);
      finish();
    }
    dialog.dismiss();
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item)
  {
    if (item.getItemId() == android.R.id.home) {
      finish();
      return true;
    } else {
      return super.onOptionsItemSelected(item);
    }
  }
}
Java Source Code List
