Question

我一直在使用NotificationCompat.Builder创建媒体控制通知。当播放状态更改时，我会相应地更新通知。下面的代码片段应该让我了解我一直在做什么。

private NotificationCompat.Builder mNotificationBuilder;

mNotificationBuilder = new NotificationCompat.Builder(this, channelId);
    // Prebuild the notification
    mNotificationBuilder
            .setSmallIcon(R.drawable.ic_statusbar)
            .setContentIntent(mSessionActivityIntent)
            .setDeleteIntent(closePendingIntent)
            .addAction(new NotificationCompat.Action(R.drawable.round_skip_previous_white_36, "Previous", MediaButtonReceiver.buildMediaButtonPendingIntent(this, PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS)))
            .addAction(new NotificationCompat.Action(R.drawable.round_play_arrow_white_36, "Play", MediaButtonReceiver.buildMediaButtonPendingIntent(this, PlaybackStateCompat.ACTION_PLAY_PAUSE)))
            .addAction(new NotificationCompat.Action(R.drawable.round_skip_next_white_36, "Next", MediaButtonReceiver.buildMediaButtonPendingIntent(this, PlaybackStateCompat.ACTION_SKIP_TO_NEXT)))
            .setShowWhen(false)
            .setPriority(NotificationCompat.PRIORITY_MAX)
            .setCategory(NotificationCompat.CATEGORY_TRANSPORT)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setStyle(new MediaStyle().setShowActionsInCompactView(0, 1, 2)
                        .setMediaSession(mMediaSessionToken));

当播放状态在播放和暂停之间改变时，我会更新通知以更改播放/暂停按钮。

...
mNotificationBuilder.mActions.set(1, new NotificationCompat.Action(playIcon, "Play", MediaButtonReceiver.buildMediaButtonPendingIntent(this, action)));
...

这之前没有任何问题，现在仍然可以。问题是mActions字段现在受到限制。我在NotificationCompat.java来源中发现了这一点。

/** @hide */
    @RestrictTo(LIBRARY_GROUP)
    public ArrayList<Action> mActions = new ArrayList<>();

很奇怪，现在不提供任何更新方法而将其隐藏的事实。恐怕将来该领域将完全无法访问。有什么想法吗？

NotificationCompat.Builder mActions字段现在受到限制，因此如何更新操作？

0 个答案: