How to read all the coming notifications in android

First you must declare your intent to receive notifications in your manifest, so that you can get the android.permission.BIND_NOTIFICATION_LISTENER_SERVICE permission.

AndroidManifest.xml:

<service android:name=".NotificationListener"
         android:label="@string/service_name"
         android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
    <intent-filter>
        <action android:name="android.service.notification.NotificationListenerService" />
    </intent-filter>
</service>

Then create a NotificationListenerService class and override the onNotificationPosted function.

For more information, read the developer reference here: https://developer.android.com/reference/android/service/notification/NotificationListenerService.html

Also look at this simple example application for implementation guidance: https://github.com/kpbird/NotificationListenerService-Example/

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