直接上程式碼，只要通知的id不一樣就可以實現多條通知，也是就是這句notificationManager.notify(mNotificationNum, notification.build());

還有一個問題，服務端一般不會給你返通知id，也不好返，那怎麼辦？？？
我是這麼處理的，當通知條數超過10條之後把時間最早的那條通知替換掉

/**
     * 實現自定義推送聲音
     * @param context
     * @param bundle
     */
    private void processCustomMessage(Context context, Bundle bundle) {
        mNotificationNum++;
 

        if(mNotificationNum > NOTIFICATION_SHOW_SHOW_AT_MOST) {
            mNotificationNum = 1;
        }
        NotificationCompat.Builder notification = new NotificationCompat.Builder(context);

        String title = bundle.getString(JPushInterface.EXTRA_TITLE);
//      String msg = bundle.getString
 
(JPushInterface.EXTRA_MESSAGE);
        String extras = bundle.getString(JPushInterface.EXTRA_EXTRA);
        Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.icon_mdpi);

        Intent mIntent = new Intent(context,NewsArticleActivity.class);
        ThirdView.isReadList
 
 = false;
        mIntent.putExtra("sex", "");
        mIntent.putExtras(bundle);
        mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, mIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        notification.setContentIntent(pendingIntent)
                .setAutoCancel(true);


        if (!TextUtils.isEmpty(extras)) {
            try {
                JSONObject extraJson = new JSONObject(extras);
                if (null != extraJson && extraJson.length() > 0) {
                    String content = extraJson.getString("title");
                    notification.setContentText(content);
                    notification.setSound(Uri.parse("android.resource://" + context.getPackageName() + "/" +R.raw.jiguang));
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
        if(TextUtils.isEmpty(title)) {
            title = "";
        }
        title = title.equals("") ? "" : title;
        notification.setContentTitle(title)
                .setSmallIcon(R.mipmap.icon_mdpi)
                .setLargeIcon(bitmap);

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
        notificationManager.notify(mNotificationNum, notification.build());
    }