java - 通过 setSound() 设置自定义通知声音(和振动)不起作用

Question

当尝试在我的应用程序中创建通知时，设置自定义通知声音不起作用，而是使用系统默认声音。另外，我尝试在通知上启用振动，但这也不起作用。

我尝试按如下方式设置声音(相关 fragment ，请参阅下面的完整代码):

Uri sound = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.bell);
NotificationCompat.Builder notificationBuilder =
            new NotificationCompat.Builder(this, channelId);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel(channelId,
        "Order notifications", NotificationManager.IMPORTANCE_MAX);
    notificationManager.createNotificationChannel(channel);

    channel.setSound(sound, 
        new AudioAttributes.Builder()
            .setUsage(AudioAttributes.USAGE_NOTIFICATION)
            .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
            .build()
    );
    channel.setVibrationPattern(new long[]{0, 500});
} else {
    notificationBuilder
            .setVibrate(new long[]{0, 500})
            .setSound(sound);
}

notificationManager.notify(0, notificationBuilder.build());

我的自定义声音是一秒长的声音 fragment ，以 44.1 kHz 采样，存储为 res/raw/bell.wav。我还尝试将代码 fragment 转换为不同的其他格式，我尝试了 mp3 和 ogg 但没有成功。 关于振动: android.permission.VIBRATE 包含在 list 中。

我不知道我做错了什么。以下是创建并发布通知的 sendNotification() 函数的完整代码。

private void sendNotification(String messageBody) {
    Intent intent = new Intent(this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
            PendingIntent.FLAG_ONE_SHOT);

    String channelId = getString(R.string.default_notification_channel_id);
    Uri sound = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.bell);
    NotificationCompat.Builder notificationBuilder =
            new NotificationCompat.Builder(this, channelId)
                    .setSmallIcon(R.drawable.ic_launcher_web)
                    .setContentTitle("New order")
                    .setContentText(messageBody)
                    .setAutoCancel(true)
                    .setContentIntent(pendingIntent);

    NotificationManager notificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    // Since android Oreo notification channel is needed.
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel(channelId,
                "Order notifications",
                NotificationManager.IMPORTANCE_MAX);
        notificationManager.createNotificationChannel(channel);

        AudioAttributes att = new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
                .build();

        channel.setSound(sound, att);
        channel.setVibrationPattern(new long[]{0, 500});
    } else {
        notificationBuilder
                .setVibrate(new long[]{0, 500})
                .setSound(sound);
    }

    notificationManager.notify(0, notificationBuilder.build());
}

Answer 1

创建NotificationChannel后，您无法更改灯光、声音和振动等内容。也许这就是问题所在。要查看更改，您需要先删除该应用并再次安装。