Android: Remove Notification from Notification Bar

How to remove notification from notification bar programmatically in android?

Maybe try this :

NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);

OR, you can also do this to cancel all notifications in given context:

notificationManager.cancelAll();

See this link to the documentation : NotificationManager

Android: remove notification from notification bar

This is quite simple. You have to call cancel or cancelAll on your NotificationManager. The parameter of the cancel method is the ID of the notification that should be canceled.

See the API: http://developer.android.com/reference/android/app/NotificationManager.html#cancel(int)

How to remove a notification from the status bar

You can remove a notification using NotificationManager.cancel() and passing in the id that was used in the notify call.

notificationManager.cancel(100);

Remove all notifications from notification bar

Starting with API Level 18 you can cancel Notifications posted by other apps different than your own using NotificationListenerService, the method changed a little in Lollipop, here is the way to remove notifications covering also Lillipop API.

First inside the onNotificationPosted method you store all the StatusBarNotification objects.
Then you should maintain an updated reference to those objects, removing them if the notification is somehow dismissed in onNotificationRemoved method.

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
public class NotificationService extends NotificationListenerService {

    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {
        // Store each StatusBarNotification object
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        // Delete removed StatusBarNotification objects
    }
}

Finally you can remove any notification using cancelNotification method.

 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
    cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
else {
    cancelNotification(sbn.getKey());
}

How to remove notification from status bar when clicking the my footer icon

You can call the notification outside service class (such as activity using button click) in this way:

NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.cancel(MY_NOTIFICATION_ID);

You can see the detail of it at https://developer.android.com/training/notify-user/build-notification#Removing.

Cancel (and hide) Android notification programmatically

If you want to use your Notification as part of a foreground service, rather than manipulate flags directly, use startForeground() and stopForeground() on your Service.

Remove notification bar android studio

On Android 4.0 and Lower
In AndroidManifest.xml -> inside the activity which you want to use, add the following to hide the status bar:

android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen" >

Programatically, by setting WindowManager flag:

Write a helper function

void hideStatusBar() {
        // For Android version lower than Jellybean, use this call to hide the status bar.
        if (Build.VERSION.SDK_INT < 16) {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
           this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                                        WindowManager.LayoutParams.FLAG_FULLSCREEN);
        } else {
            View decorView = getWindow().getDecorView();
            // Hide the status bar.
            int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
            decorView.setSystemUiVisibility(uiOptions);
        }
    }

Use the helper function in onCreate()

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        hideStatusBar();
        // We should never show the action bar if the status bar is hidden, so hide that too 
//if necessary.
        getSupportActionBar().hide()  // if you have extended the activity from support lib like Appcompat, else use getActionBar().hide() here
           setContentView(R.layout.activity_main);
    }

Please Note:

1. onCraete() will not get called always, so If you want system UI changes to persist as the user navigates in and out of your activity, set UI flags in onResume() or onWindowFocusChanged().
2. Use it before super.onCreate(savedInstanceState); if it crash

Find more details from here

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