android，显示通知

Notification.java

private void showNotification(Context context){
        Bitmap btm = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_launcher);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                                            .setSmallIcon(R.drawable.ic_launcher)
                                            .setContentTitle(context.getString(R.string.please_record_today_event))
                                            .setContentText(context.getString(R.string.alarm_summary));
        // 第一次提示消息的时候显示在通知栏上
        builder.setTicker(context.getString(R.string.please_record_today_event));
//        builder.setNumber(12);
        builder.setLargeIcon(btm);
        // 自己维护通知的消失
        builder.setAutoCancel(true);
        builder.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE);

        // 构建一个Intent
        Intent resultIntent = new Intent(context,MainActivity.class);
        // 封装一个Intent
        PendingIntent resultPendingIntent = PendingIntent.getActivity(context, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        // 设置通知主题的意图
        builder.setContentIntent(resultPendingIntent);

        // 获取通知管理器对象
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, builder.build());
    }