CODEWITHSUNDEEP
javaandroidnotifications
Ethan Rodrigo
Ethan Rodrigo

Reputation: 355

How to use NotificationListenerService to block notification in android

NOTE: I'm aware that this question somehow can be a duplicate. Still I'm asking this as I found no tutorial or any proper answer for the above question.

I'm making an app which has a feature that user can block the notifications. The user can select either to block all the notifications or block only selected apps. To select apps for blocking notifications I have created a RecyclerView where user can choose which app to be blocked, and to block all notifications there is a master switch. The android Rooms are used to save data even after the activity is destroyed.

Following is a screenshot of the app.

A screenshot of the app

All I need to know is how can I implement the NotificationListenerService in order to block notifications. As I mentioned before I want only to block notifications when the app is selected in the RecyclerView or the Block all notifications, master switch is turned on. Anyone who can give me a proper guide is appreciated.

PS: There are 8 files in the project and I have no idea how to post them here, any solutions for that also?

Upvotes: 3

Views: 1173

Answers (2)

Ethan Rodrigo
Ethan Rodrigo

Reputation: 355

I found a way! Obviously I created a NotificationListener class which extends the NotificationListenerService class and then override the onNotificationPosted(StatusBarNotification sbn) function.

To block all the notifications I created a variable in MainActivity.java named public static boolean BLOCK_ALL = false;. This variable would change as the Block All Notification switch in the screenshot changed.

    SwitchMaterial blockAllNotifications = findViewById(R.id.blockAllNotifications);
    blockAllNotifications.setChecked(BLOCK_ALL);
    blockAllNotifications.setOnCheckedChangeListener((buttonView, isChecked) -> {
                BLOCK_ALL = isChecked;
    });

And in the onNotificationPosted(StatusBarNotification sbn) function in the NotificationListener I added following condition;

    if(MainAcitivity.BLOCK_ALL)cancelAllNotifications();

Whenever the Block All Notifiction switch is turned on it's going to call cancelAllNotification() function and block all the notifications.

At last in order to block notifications of each package I did something as follow. As I mentioned in the question, I have all the apps whose switch is turned on in a Room named BlockedList. Therefore I added a logic; if the package which has posted the notification is in the BlockedList I blocked that app's notifications with cancelNotification(String key).

appNameList = appsDB.dbDAO().getAllAppNames();
if(appNameList.contains(getApplicationName(sbn.getPackageName()))){  // if the blocked list has the app name of the notification
    cancelNotification(sbn.getKey());
}

/***
* getApplicationName: get the application name of the notification belongs to
* @param pack: the package name; a StatusBarNotification.getPackageName()
* @return
*/
private String getApplicationName(String pack){
    final PackageManager pm = context.getPackageManager();
    ApplicationInfo appInfo;
    try{
        appInfo = pm.getApplicationInfo(pack, 0);  // getting the application info
    }catch(PackageManager.NameNotFoundException e){
        appInfo = null;
    }
    final String appName = (String) (appInfo != null? pm.getApplicationLabel(appInfo) : "(unknown)");  // if the appInfo is not null get the label of the Application
    return appName;
}

Upvotes: 4

Seven
Seven

Reputation: 1

Every notification(StatusBarNotification) has its own packagename,

public String getPackageName() {
    return pkg;
}

I think you can block it through StatusBarNotification attribute

Upvotes: -1

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