Android 5.0后，创建顶部通知栏已经发生改变，样例如下：

//获取NotificationManager实例 
NotificationManager notifyManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); 
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.mipmap.icon)
 .setContentTitle(title)
 .setContentText(description);
 Intent resultIntent = new Intent(context, LoginActivity.class); 
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(LoginActivity.class);//避免二次页面跳转 
stackBuilder.addNextIntent(resultIntent); 
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent( 0, PendingIntent.FLAG_UPDATE_CURRENT ); 
mBuilder.setContentIntent(resultPendingIntent);// mId allows you to update the notification later on. notifyManager.notify(0, mBuilder.build());