Android8.0通知的显示

1、NotificationCompat.Builder（）问题，在安卓8.0 “O” 对通知栏新增了一个ChannelId参数，在new的时候添加上channelId即可

new NotificationCompat.Builder(this,"default")
 

2.例子

        Intent intent;
        intent = new Intent(this, MainActivity.class);
        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        //8.0 以后需要加上channelId 才能正常显示
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            String channelId = "default";
            String channelName = "defaukt notify";
            manager.createNotificationChannel(new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_HIGH));
        }

        
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addParentStack(MainActivity.class);
        stackBuilder.addNextIntent(intent);

        PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

        Notification notification = new NotificationCompat.Builder(this, "default")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("this is the title")
                .setContentText("this is the text")
                .setAutoCancel(true)
                .setDefaults(Notification.DEFAULT_ALL)
                .setWhen(System.currentTimeMillis())
                .setContentIntent(pendingIntent)
                .build();


        manager.notify(1, notification);