问题 第二个操作的PendingIntent会覆盖第一个操作和contentIntent for Notification

代码：

int id = 0;
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
  .setContentTitle(context.getString(R.string.notification_on_the_move_gps_title))
  .setContentText(context.getString(R.string.notification_on_the_move_text));

builder.setStyle(new NotificationCompat.BigTextStyle().bigText(context.getString(R.string.notification_on_the_move_gps_big_text)));

Intent mainIntent = new Intent(context, MainActivity.class);

Intent turnOffIntent = new Intent(context, MainActivity.class);
turnOffIntent.putExtra(MainApp.KEY_TURN_OFF_NOTIFICATION_ID, id);

TaskStackBuilder mainBuilder = TaskStackBuilder.create(context);
mainBuilder.addParentStack(MainActivity.class);
mainBuilder.addNextIntent(mainIntent);
PendingIntent mainPendingIntent = mainBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(mainPendingIntent);

TaskStackBuilder turnOffBuilder = TaskStackBuilder.create(context);
turnOffBuilder.addParentStack(MainActivity.class);
turnOffBuilder.addNextIntent(turnOffIntent);
PendingIntent turnOffPendingIntent = turnOffBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

builder
  .setSmallIcon(R.drawable.ic_stat_notification)
  .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher))
  .setAutoCancel(true)
  .setLights(Color.BLUE, 500, 500)
  .setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE)
  .addAction(R.drawable.ic_stat_notification, "Open", mainPendingIntent)
  .addAction(R.drawable.ic_stat_notification_off, "Turn off", turnOffPendingIntent);

NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(id, builder.build());

问题：

单击未展开或展开的通知正文或打开操作按钮始终使用（KEY_TURN_OFF_NOTIFICATION_ID）额外传递意图。

我试过放弃TaskStackBuilder并创建 PendingIntent简单地说：

Intent mainIntent = new Intent(context, MainActivity.class);
PendingIntent piMain = PendingIntent.getActivity(context, 0, mainIntent, 0);

Intent turnOffIntent = new Intent(context, MainActivity.class);
turnOffIntent.putExtra(MainApp.KEY_TURN_OFF_NOTIFICATION_ID, id);
PendingIntent piTurnOff = PendingIntent.getActivity(context, 0, turnOffIntent, 0);

但是，为了同样的效果:(

如果我省略 setContentIntent()当然，点击通知机构什么都不做。

如果我订 setContentIntent()  后 设置动作，然后在MainActivity中永远不会收到额外的动作。