Android - 通知 channel API >= 26 无法正常工作

Question

我一直在与 API 26 及更高版本中引入的新 NotificationChannels 作斗争。

我正在开发一个应用程序，可以选择在四种情况下是否收到通知:

1. 声音和振动。
2. 只有声音。
3. 仅振动。
4. 没有声音或振动，只有一个弹出窗口。

在所有情况下，无论我选择什么，我的应用都会通过声音和振动进行通知。

我的代码是:

NotificationCompat.Builder builder;
    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        builder = new NotificationCompat.Builder(context, CHANNEL_ID);
        int importance;
        NotificationChannel channel;

        //Boolean for choosing Sound
        if(sound) {
            importance = NotificationManager.IMPORTANCE_DEFAULT;
        } else {
            importance = NotificationManager.IMPORTANCE_LOW;
        }

        channel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, importance);
        channel.setDescription(CHANNEL_DESC);

        //Boolean for choosing Vibrate
        if(vibrate) {
            channel.enableVibration(true);
        } else {
            channel.enableVibration(false);
        }

        notificationManager.createNotificationChannel(channel);
    } else {
        builder = new NotificationCompat.Builder(context);
    }

    if(sound && vibrate) {
        //Sound and Vibrate
        builder.setDefaults(Notification.DEFAULT_ALL);
    } else if(sound && !vibrate) {
        //Sound
        builder.setDefaults(Notification.DEFAULT_SOUND);
    } else if(!sound && vibrate) {
        //Vibrate
        builder.setDefaults(Notification.DEFAULT_VIBRATE);
    } else if(!sound && !vibrate) {
        //None
        //Do nothing! just notification with no sound or vibration
    }

    builder.setSmallIcon(R.drawable.ic_logo)
            .setContentTitle(title)
            .setContentText(text)
            .setAutoCancel(true)
            .setOnlyAlertOnce(false)
            .setPriority(Notification.PRIORITY_MAX);

此外，我每次运行该应用程序时都会更改 CHANNEL_ID，因此它每次都会获得一个新的 channel ID 以进行测试，直到我找到解决方案。

当然，API 小于 26 时它也能正常工作。

谢谢大家!

Answer 1

谢谢大家

我设法通过简单地为每个案例创建一个 NotificationCompat.Builder 和 NotificationChannel 来解决它，并在它的时候通知每个 Builder满足条件。

我不知道这是否是最佳实践，但如果有人对此有任何意见，我会稍后尝试优化代码。但它现在工作得很好。

这是我的代码:

NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationCompat.Builder builder_all, builder_sound, builder_vibrate, builder_none;
        NotificationChannel channel_all = new NotificationChannel(CHANNEL_ID_ALL, CHANNEL_NAME_ALL, NotificationManager.IMPORTANCE_HIGH);
        channel_all.enableVibration(true);
        notificationManager.createNotificationChannel(channel_all);

        NotificationChannel channel_sound = new NotificationChannel(CHANNEL_ID_SOUND, CHANNEL_NAME_SOUND, NotificationManager.IMPORTANCE_HIGH);
        channel_sound.enableVibration(false);
        notificationManager.createNotificationChannel(channel_sound);

        NotificationChannel channel_vibrate = new NotificationChannel(CHANNEL_ID_VIBRATE, CHANNEL_NAME_VIBRATE, NotificationManager.IMPORTANCE_HIGH);
        channel_vibrate.setSound(null, null);
        channel_vibrate.enableVibration(true);
        notificationManager.createNotificationChannel(channel_vibrate);

        NotificationChannel channel_none = new NotificationChannel(CHANNEL_ID_NONE, CHANNEL_NAME_NONE, NotificationManager.IMPORTANCE_HIGH);
        channel_none.setSound(null, null);
        channel_none.enableVibration(false);
        notificationManager.createNotificationChannel(channel_none);

        //Boolean for Sound or Vibrate are chosen
        if(sound && vibrate) {
            builder_all = new NotificationCompat.Builder(context, CHANNEL_ID_ALL);
            builder_all.setSmallIcon(R.drawable.ic_logo)
                    .setContentTitle(title)
                    .setContentText(text)
                    .setAutoCancel(true)
                    .setOnlyAlertOnce(false);
            switch (transition) {
                case Geofence.GEOFENCE_TRANSITION_ENTER:
                    builder_all.setSmallIcon(R.drawable.ic_entered_white);
                    break;
                case Geofence.GEOFENCE_TRANSITION_EXIT:
                    builder_all.setSmallIcon(R.drawable.ic_left_white);
                    break;
            }

            notificationManager.notify(notificationID, builder_all.build());
        } else if(sound && !vibrate) {
            builder_sound = new NotificationCompat.Builder(context, CHANNEL_ID_SOUND);
            builder_sound.setSmallIcon(R.drawable.ic_logo)
                    .setContentTitle(title)
                    .setContentText(text)
                    .setAutoCancel(true)
                    .setOnlyAlertOnce(false);
            switch (transition) {
                case Geofence.GEOFENCE_TRANSITION_ENTER:
                    builder_sound.setSmallIcon(R.drawable.ic_entered_white);
                    break;
                case Geofence.GEOFENCE_TRANSITION_EXIT:
                    builder_sound.setSmallIcon(R.drawable.ic_left_white);
                    break;
            }

            notificationManager.notify(notificationID, builder_sound.build());
        } else if(!sound && vibrate) {
            builder_vibrate = new NotificationCompat.Builder(context, CHANNEL_ID_VIBRATE);
            builder_vibrate.setSmallIcon(R.drawable.ic_logo)
                    .setContentTitle(title)
                    .setContentText(text)
                    .setAutoCancel(true)
                    .setOnlyAlertOnce(false);
            switch (transition) {
                case Geofence.GEOFENCE_TRANSITION_ENTER:
                    builder_vibrate.setSmallIcon(R.drawable.ic_entered_white);
                    break;
                case Geofence.GEOFENCE_TRANSITION_EXIT:
                    builder_vibrate.setSmallIcon(R.drawable.ic_left_white);
                    break;
            }

            notificationManager.notify(notificationID, builder_vibrate.build());
        } else if(!sound && !vibrate) {
            builder_none = new NotificationCompat.Builder(context, CHANNEL_ID_NONE);
            builder_none.setSmallIcon(R.drawable.ic_logo)
                    .setContentTitle(title)
                    .setContentText(text)
                    .setAutoCancel(true)
                    .setOnlyAlertOnce(false);
            switch (transition) {
                case Geofence.GEOFENCE_TRANSITION_ENTER:
                    builder_none.setSmallIcon(R.drawable.ic_entered_white);
                    break;
                case Geofence.GEOFENCE_TRANSITION_EXIT:
                    builder_none.setSmallIcon(R.drawable.ic_left_white);
                    break;
            }

            notificationManager.notify(notificationID, builder_none.build());
        }
    } else {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context);

        if(sound && vibrate) {
            //Sound and Vibrate
            builder.setDefaults(Notification.DEFAULT_ALL);
        } else if(sound && !vibrate) {
            //Sound
            builder.setDefaults(Notification.DEFAULT_SOUND);
        } else if(!sound && vibrate) {
            //Vibrate
            builder.setDefaults(Notification.DEFAULT_VIBRATE);
        } else if(!sound && !vibrate) {
            //None
            //Do nothing! just notification with no sound or vibration
        }

        builder.setSmallIcon(R.drawable.ic_logo)
                .setContentTitle(title)
                .setContentText(text)
                .setAutoCancel(true)
                .setOnlyAlertOnce(false)
                .setPriority(Notification.PRIORITY_MAX);

        switch (transition) {
            case Geofence.GEOFENCE_TRANSITION_ENTER:
                builder.setSmallIcon(R.drawable.ic_entered_white);
                break;
            case Geofence.GEOFENCE_TRANSITION_EXIT:
                builder.setSmallIcon(R.drawable.ic_left_white);
                break;
        }

        notificationManager.notify(notificationID, builder.build());
    }