android 生成前台通知渠道 NotificationChannel

﹏ヽ暗。殇╰゛Y 2024-04-17 06:38 47阅读 0赞

android 8.0系统开始加入了一个新功能，就是可以生成前台通知渠道，用于自定义声音，震动等快捷操作，如果想一直常驻于通知栏，在自定义的Service中调用
    startForeground(notifyID, notification);

就可以了，代码例子如下：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                String id = "imservice";
                String name = "前台通知渠道测试";
                String description = "测试内容";
                int importance = 0;
                NotificationChannel mChannel = new NotificationChannel(id, (CharSequence) name, importance);
                mChannel.setSound((Uri) null, (AudioAttributes) null);
                mChannel.setDescription(description);
                notificationManager.createNotificationChannel(mChannel);
                int notifyID = 999;
                Notification notification = (new Notification.Builder((Context) this))
                        .setContentTitle((CharSequence) name)
                        .setContentText((CharSequence) description)
                        .setLargeIcon(BitmapFactory.decodeResource(this.getResources(), R.mipmap.ic_channel_1))
                        .setSmallIcon(R.mipmap.ic_channel)
    //                    .setContentIntent(this.getIntent())
                        .setChannelId(id).build();
                this.startForeground(notifyID, notification);
            }

效果图如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 3][]

如果已经打开了这个常驻通知渠道，又想在其他地方关掉，代码如下：

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                // 删除之前im中ImService中生成的渠道
                NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                manager.deleteNotificationChannel("imservice");
            }

还发现个神奇的地方，设置 NotificationChannel的importance，当设置比较较高级别，就会自动弹出横幅通知，代码如下：

NotificationChannel channel = new NotificationChannel(channelId,
                        "通知渠道测试",
                        NotificationManager.IMPORTANCE_HIGH);

好了，又可以愉快玩耍了

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/15/268635a864084658ae29693bcc068f3c.jpeg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/15/017549192e16411ea4bd0137a5e24aa3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21zbjQ2NTc4MA_size_16_color_FFFFFF_t_70 3]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/15/a3486220405e49118cc5261035d81768.png