如何检查我的应用是否允许显示通知

Question

在 Android 设置中，用户可以根据自己的意愿关闭通知。那么有没有像isNotificationAllowed() 这样的方法来检查我的应用程序是否允许显示通知？以及如何打开android设置页面来引导我的用户打开通知？

Answer 1

编辑 - 新答案：

似乎谷歌添加了正确的 API 调用： NotificationManagerCompat.from(context).areNotificationsEnabled()

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旧答案：

对于正在查看此问题的任何人，请注意 NotificationListenerService 与“显示通知”不同。 这两个是不同的东西！如果一个应用程序可以访问NotificationListenerService 并不意味着它的通知会显示，反之亦然。为了检查用户是否阻止了来自您的应用的通知，您可以使用反射：

public class NotificationsUtils {

private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

public static boolean isNotificationEnabled() {

    AppOpsManager mAppOps = (AppOpsManager) GlobalContext.getContext().getSystemService(Context.APP_OPS_SERVICE);

    ApplicationInfo appInfo = GlobalContext.getContext().getApplicationInfo();

    String pkg = GlobalContext.getContext().getApplicationContext().getPackageName();

    int uid = appInfo.uid;

    Class appOpsClass = null; /* Context.APP_OPS_MANAGER */

    try {

        appOpsClass = Class.forName(AppOpsManager.class.getName());

        Method checkOpNoThrowMethod = appOpsClass.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE, String.class);

        Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);
        int value = (int)opPostNotificationValue.get(Integer.class);

        return ((int)checkOpNoThrowMethod.invoke(mAppOps,value, uid, pkg) == AppOpsManager.MODE_ALLOWED);

    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
    return false;
}
}

来源：https://code.google.com/p/android/issues/detail?id=38482

Answer 2

NotificationManagerCompat.from(context).areNotificationsEnabled()

似乎是一条路。

Answer 3

这里是这个问题的更完整答案

fun areNotificationsEnabled(context: Context, channelId: String = "fcm_fallback_notification_channel"): Boolean {
    // check if global notification switch is ON or OFF
    if (NotificationManagerCompat.from(context).areNotificationsEnabled())
        // if its ON then we need to check for individual channels in OREO
        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            val channel = manager.getNotificationChannel(channelId)
            return channel?.importance != NotificationManager.IMPORTANCE_NONE
        } else {
            // if this less then OREO it means that notifications are enabled
            true
        }
    // if this is less then OREO it means that notifications are disabled
    return false
}

Answer 4

试试这个：

Is there a way an app can check if it is allowed to access notifications?

这里还有一点解释：

Check for access to notifications using NotificationListenerService

Answer 5

试试这个：

if (Settings.Secure.getString(getActivity().getContentResolver(), "enabled_notification_listeners").contains(getActivity().getPackageName())) {
    // Notification access service already enabled
    Toast.makeText(getActivity(),"notification enabled",Toast.LENGTH_LONG).show();
} else {
    Intent intent = new Intent();
    intent.setClassName("com.android.settings", "com.android.settings.Settings$AppNotificationSettingsActivity");
    intent.putExtra("app_package", getPackageName());
    intent.putExtra("app_uid", getApplicationInfo().uid);
    startActivity(intent);
}

Answer 6

if(NotificationManagerCompat.from(context).areNotificationsEnabled())
{
 //Do your Work
}
else
{
     //Ask for permission
}