Android Oreo Notifications - 检查是否启用了特定频道

Question

我正在使用此代码段来检查是否启用了通知：

NotificationManagerCompat.from(getContext()).areNotificationsEnabled()

但是，如果用户仅禁用该频道，我无法知道它。

任何的想法？

Answer 1

具有向后兼容性：

public boolean isNotificationChannelEnabled(Context context, @Nullable String channelId){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            if(!TextUtils.isEmpty(channelId)) {
                NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                NotificationChannel channel = manager.getNotificationChannel(channelId);
                return channel.getImportance() != NotificationManager.IMPORTANCE_NONE;
            }
            return false;
        } else {
            return NotificationManagerCompat.from(context).areNotificationsEnabled();
        }
    }

Answer 2

看看文档here。

用户可以修改通知通道的设置，包括振动和警报声等行为。您可以调用以下两种方法来发现用户已应用于通知通道的设置：

要检索单个通知渠道，您可以调用getNotificationChannel()。要检索属于您的应用的所有通知渠道，您可以致电getNotificationChannels()。拥有NotificationChannel后，您可以使用getVibrationPattern()和getSound()等方法来查找用户当前拥有的设置。要确定用户是否阻止了通知渠道，您可以调用getImportance()。如果通知渠道被阻止，getImportance()将返回IMPORTANCE_NONE。

Answer 3

使用此选项可检查整体通知或通道是否已禁用，并将用户带到相应的设置：

在调用方法中：

if (!notificationManager.areNotificationsEnabled()) {
        openNotificationSettings();
        return;
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O &&
            isChannelBlocked(CHANNEL_1_ID)) {
        openChannelSettings(CHANNEL_1_ID);
        return;
    }

在你的班上：

private void openNotificationSettings() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        Intent intent = new Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS);
        intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
        startActivity(intent);
    } else {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:" + getPackageName()));
        startActivity(intent);
    }
}

@RequiresApi(26)
private boolean isChannelBlocked(String channelId) {
    NotificationManager manager = getSystemService(NotificationManager.class);
    NotificationChannel channel = manager.getNotificationChannel(channelId);

    return channel != null &&
            channel.getImportance() == NotificationManager.IMPORTANCE_NONE;
}

@RequiresApi(26)
private void openChannelSettings(String channelId) {
    Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
    intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
    intent.putExtra(Settings.EXTRA_CHANNEL_ID, channelId);
    startActivity(intent);
}

Answer 4

这种方法可以帮助：

public boolean isNotificationChannelDisabled(@NonNull String channelId) {
        if(!channelId.equals(EMPTY)) {
            NotificationChannel channel = getManager().getNotificationChannel(channelId);
            return channel.getImportance() == NotificationManager.IMPORTANCE_NONE;
        }

        return false;
    }

private NotificationManager getManager(@NonNull Context context) {
        return mManager(android.app.NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    }

Answer 5

我认为@itzhar的例子有一个缺陷：当用户在app中完全禁用通知时，我们可能会出现误报（当频道本身未被禁用时）。

更新的代码（在Kotlin中）可能如下所示：

fun isNotificationAllowed(context: Context): Boolean {
    return if (isOOrLater()) {
        areNotificationsEnabled(context) and isChannelDisabled(context)
    } else {
        areNotificationsEnabled(context)
    }
}

private fun areNotificationsEnabled(context: Context) =
    NotificationManagerCompat.from(context).areNotificationsEnabled()

@RequiresApi(api = Build.VERSION_CODES.O)
private fun isChannelDisabled(context: Context): Boolean{
    val notificationManager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    val channel = notificationManager.getNotificationChannel(NOTIFICATION_CHANNEL_ID)
    return channel.importance != NotificationManager.IMPORTANCE_NONE
}

private fun isOOrLater() = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O

Answer 6

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            if(NotificationManagerCompat.from(context).areNotificationsEnabled()) {
                for (String channelId : channelIds) {
                    if (!TextUtils.isEmpty(channelId)) {
                        NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                        if (manager != null) {
                            NotificationChannel channel = manager.getNotificationChannel(channelId);
                            if (channel.getImportance() == NotificationManager.IMPORTANCE_NONE)
                                return false;
                        }
                    }
                }
                return true;
            }else return false;
        }else{
            return NotificationManagerCompat.from(context).areNotificationsEnabled();
        }