Question

自从添加对Android O的支持后，每当我的应用的媒体控制通知得到更新（元数据或播放状态更改）时，运行O的Android设备都会收到警报（音调或振动）。我正在寻找一种方法来禁用此警报，因为它不适用于媒体样式通知。

以下是我用来创建媒体控件通知的代码：

MediaDescriptionCompat description = metadata.getDescription();
String artistName = metadata.getString(MediaMetadataCompat.METADATA_KEY_ARTIST);
String albumName = metadata.getString(MediaMetadataCompat.METADATA_KEY_ALBUM);
Bitmap largeIcon = BitmapFactory.decodeResource(playbackService.getResources(),
        R.drawable.vector_global_defaultsong);

NotificationCompat.Builder notificationBuilder = new NotificationCompat
        .Builder(playbackService, NotificationHelper.CHANNEL_MEDIA_CONTROLS)
        .setColor(ContextCompat.getColor(playbackService, R.color.colorAccent))
        .setSmallIcon(R.drawable.logo_light_filled)
        .setContentTitle(description.getTitle())
        .setContentText(playbackService.getString(R.string.song_list_subtitle_format,
                artistName, albumName))
        .setContentIntent(createContentIntent())
        .setDeleteIntent(MediaButtonReceiver.buildMediaButtonPendingIntent(playbackService,
                PlaybackStateCompat.ACTION_STOP))
        .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
        .setOngoing(playbackState.getState() == PlaybackStateCompat.STATE_PLAYING)
        .setLargeIcon(largeIcon);

notificationBuilder.setStyle(new android.support.v4.media.app.NotificationCompat.MediaStyle()
        // show previous, play/pause, and next in compact view
        .setShowActionsInCompactView(addActions(notificationBuilder))
        .setMediaSession(sessionToken));
showNotification(notificationBuilder.build());

。。

private void showNotification(final Notification notification) {
    if (!started) {
        mediaController.registerCallback(mediaControllerCallback);
        playbackService.startForeground(NOTIFICATION_ID, notification);
        started = true;
    } else {
        notificationManager.notify(NOTIFICATION_ID, notification);
    }

    if (playbackState.getState() == PlaybackStateCompat.STATE_PAUSED) {
        playbackService.stopForeground(false);
    }
}

以下是我用来创建通知渠道的代码：

public static final String CHANNEL_MEDIA_CONTROLS = "media_controls";

public static void createNotificationChannels(Context context) {
    if (android.os.Build.VERSION.SDK_INT >= 26) {
        NotificationChannel mediaControlsChannel = new NotificationChannel(CHANNEL_MEDIA_CONTROLS,
                context.getString(R.string.notification_channel_media_controls),
                NotificationManager.IMPORTANCE_HIGH);
        mediaControlsChannel.setShowBadge(false);
        getNotificationManager(context).createNotificationChannel(mediaControlsChannel);
    }
}

更新：在通知渠道上将showBadge设置为false似乎无法执行任何操作。当显示媒体控件通知时，我仍会在应用程序图标上收到徽章。所以看起来我设置的通知通道属性没有被应用。

Answer 1

根据Migrating MediaStyle notifications to Android O，您应该使用IMPORTANCE_LOW，其中不包含任何声音 - IMPORTANCE_HIGH个频道与其相关联。

Android已经在托盘中重新排序了MediaStyle次更高的通知，因此不需要使用更高的重要性，就像以前版本的Android一样。

注意：更改重要性后，您需要清除应用数据或重新安装应用，以使此更改在通知渠道中生效。

媒体控制通知在Android O上发出警报

1 个答案: