Android Open Source - kure-music-player k M P

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.kure.musicplayer;
/*  w w w .  ja  v  a 2  s .  c  o  m*/
import java.util.ArrayList;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.IBinder;

import com.kure.musicplayer.activities.ActivityQuit;
import com.kure.musicplayer.model.Song;
import com.kure.musicplayer.model.SongList;
import com.kure.musicplayer.services.ServicePlayMusic;
import com.kure.musicplayer.services.ServicePlayMusic.MusicBinder;


/**
 * Big class that contains the main logic behind kure Music Player.
 *
 * This class contains the shared logic between all the Activities.
 *
 * Thanks:
 * - For telling how to get the application version:
 *   http://stackoverflow.com/a/6593822
 */
public class kMP {

  /**
   * All the songs on the device.
   */
  public static SongList songs = new SongList();

  /**
   * All the app's configurations/preferences/settings.
   */
  public static Settings settings = new Settings();

  /**
   * Our custom service that allows the music to play
   * even when the app is not on focus.
   */
  public static ServicePlayMusic musicService = null;

  /**
   * Contains the songs that are going to be shown to
   * the user on a particular menu.
   *
   * @note IGNORE THIS - don't mess with it.
   *
   * Every `ActivityMenu*` uses this temporary variable to
   * store subsections of `SongList` and set `ActivityListSongs`
   * to display it.
   */
  public static ArrayList<Song> musicList = null;

  /**
   * List of the songs being currently played by the user.
   *
   * (independent of the UI)
   *
   * TODO remove this shit
   */
  public static ArrayList<Song> nowPlayingList = null;

  /**
   * Flag that tells if the Main Menu has an item that
   * sends the user to the Now Playing Activity.
   *
   * It's here because when firstly initializing the
   * application, there's no Now Playing Activity.
   */
  public static boolean mainMenuHasNowPlayingItem = false;

  // GENERAL PROGRAM INFO
  public static String applicationName = "kure Music Player";
  public static String packageName = "<unknown>";
  public static String versionName = "<unknown>";
  public static int    versionCode = -1;
  public static long   firstInstalledTime = -1;
  public static long   lastUpdatedTime    = -1;

  /**
   * Creates everything.
   *
   * Must be called only once at the beginning
   * of the program.
   */
  public static void initialize(Context c) {

    kMP.packageName = c.getPackageName();

    try {
      // Retrieving several information
      PackageInfo info = c.getPackageManager().getPackageInfo(kMP.packageName, 0);

      kMP.versionName        = info.versionName;
      kMP.versionCode        = info.versionCode;
      kMP.firstInstalledTime = info.firstInstallTime;
      kMP.lastUpdatedTime    = info.lastUpdateTime;

    } catch (PackageManager.NameNotFoundException e) {
      // Couldn't get package information
      //
      // Won't do anything, since variables are
      // already started with default values.
    }
  }

  /**
   * Destroys everything.
   *
   * Must be called only once when the program
   * being destroyed.
   */
  public static void destroy() {
    songs.destroy();
  }

  /**
   * The actual connection to the MusicService.
   * We start it with an Intent.
   *
   * These callbacks will bind the MusicService to our internal
   * variables.
   * We can only know it happened through our flag, `musicBound`.
   */
  public static ServiceConnection musicConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      MusicBinder binder = (MusicBinder)service;

      // Here's where we finally create the MusicService
      musicService = binder.getService();
      musicService.setList(kMP.songs.songs);
      musicService.musicBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
      musicService.musicBound = false;
    }
  };

  /**
   * Our will to start a new music Service.
   * Android requires that we start a service through an Intent.
   */
  private static Intent musicServiceIntent = null;

  /**
   * Initializes the Music Service at Activity/Context c.
   *
   * @note Only starts the service once - does nothing when
   *       called multiple times.
   */
  public static void startMusicService(Context c) {

    if (musicServiceIntent != null)
      return;

    if (kMP.musicService != null)
      return;

    // Create an intent to bind our Music Connection to
    // the MusicService.
    musicServiceIntent = new Intent(c, ServicePlayMusic.class);
    c.bindService(musicServiceIntent, musicConnection, Context.BIND_AUTO_CREATE);
    c.startService(musicServiceIntent);
  }

  /**
   * Makes the music Service stop and clean itself at
   * Activity/Context c.
   */
  public static void stopMusicService(Context c) {

    if (musicServiceIntent == null)
      return;

    c.stopService(musicServiceIntent);
    musicServiceIntent = null;

    kMP.musicService = null;
  }

  /**
   * Forces the whole application to quit.
   *
   * Please read more info on this StackOverflow answer:
   * http://stackoverflow.com/a/4737595
   *
   * @note This is dangerous, make sure to cleanup
   *       everything before calling this.
   */
  public static void forceExit(Activity c) {

    // Instead of just calling `System.exit(0)` we use
    // a temporary Activity do to the dirty job for us
    // (clearing all other Activities and finishing() itself).
    Intent intent = new Intent(c, ActivityQuit.class);

    // Clear all other Activities
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    c.startActivity(intent);

    // Clear the Activity calling this function
    c.finish();
  }
}

Java Source Code List

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