第一行代码前台服务出错记录FATAL EXCEPTION: main Process: com.android.systemui

照着第一行代码敲项目时出现如下错误


解决方法：

	notification = new NotificationCompat.Builder(this, channelId)
                    .setContentTitle("this is content title")
                    .setContentText("this is content text")
                    .setWhen(System.currentTimeMillis())
                    .setShowWhen(true)
//                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setSmallIcon(R.drawable.ic_launcher_background)// 用R.mipmap.ic_launcher会报错SystemUI问题
                    .setContentIntent(pi)
                    .build();

将setSmallIcon(R.mipmap.ic_launcher)
改为.setSmallIcon(R.drawable.ic_launcher_background)

有关于前台服务和notification在android8.0的变更可以参考以下链接：https://blog.****.net/o279642707/article/details/82352431
https://blog.****.net/qq_40909351/article/details/84986330