andROId studio开发运用手机多媒体

链接手机设备通知不起作用

学习安卓到通知这个模块，建立项目链接手机后，发现发送通知手机上却接收不到。原因F1a;安卓版本8.0以上使用通知需要先建立通知通道。解决方案： 1.构造方法：

 PRivate String createNotificationChannel(String channelID, String channelNamE, int level) {
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            NotificationChannel channel = new NotificationChannel(channelID, channelNAME, level);
            manager.createNotificationChannel(channel);
            return channelID;
        } else {
            return null;
        }
    }

2.生成通知：

String channelId = createNotificationChannel(";my_channel_ID","my_channel_name",NotificationManager.IMPORTANCE_MAX);
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new NotificationCompat.Builder(this,channelId)
                        .setContentTITle("This is content title")
                        .setContentText("This is content text")
                        .setWhen(System.currentTimeMillis())
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setLargeicon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher))
                        .setContentIntent(pi)
                        .build();