Android pauses or stops playback of other music players implementation code

     public static final String PLAYSTATE_CHANGED = "";
    public static final String META_CHANGED = "";
    public static final String QUEUE_CHANGED = "";
    public static final String PLAYBACK_COMPLETE = "";
    public static final String ASYNC_OPEN_COMPLETE = "";
    public static final String SERVICECMD = "";
    public static final String CMDNAME = "command";
    public static final String CMDTOGGLEPAUSE = "togglepause";
    public static final String CMDSTOP = "stop";
    public static final String CMDPAUSE = "pause";
    public static final String CMDPREVIOUS = "previous";
    public static final String CMDNEXT = "next";

   private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = ();
            String cmd = ("command");
            if ((cmd) || NEXT_ACTION.equals(action)) {
                next(true);
            } else if ((cmd) || PREVIOUS_ACTION.equals(action)) {
                prev();
            } else if ((cmd) || TOGGLEPAUSE_ACTION.equals(action)) {
                if (isPlaying()) {
                    pause();
                } else {
                    play();
                }
            } else if ((cmd) || PAUSE_ACTION.equals(action)) {
                pause();
            } else if ((cmd)) {
                pause();
                seek(0);
            } else if ((cmd)) {
                // Someone asked us to refresh a set of specific widgets, probably
                // because they were just added.
                int[] appWidgetIds = (AppWidgetManager.EXTRA_APPWIDGET_IDS);
                (, appWidgetIds);
            }
        }
    };