Notifier Example

[scgrant327]

When porting the Notifier example to my own project (basically copying the .h, .cpp and .java files over), and calling as shown in the Notifier example, I get this error:

W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.app.Activity.getSystemService(java.lang.String)' on a null object reference

W System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.app.Activity.getSystemService(java.lang.String)' on a null object reference

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It occurs when running this Java code:

public static void notify(String s)
    {
        try {
            if (m_notificationManager == null) {
                m_notificationManager = (NotificationManager)m_instance.getSystemService(Context.NOTIFICATION_SERVICE);
                m_builder = new Notification.Builder(m_instance);
                m_builder.setSmallIcon(R.drawable.icon);
                m_builder.setContentTitle("A message from Qt!");
            }
 
            m_builder.setContentText(s);
            m_notificationManager.notify(1, m_builder.build());
        } catch(Throwable e) {
            e.printStackTrace();
        }
    }

public static void notify(String s)
    {
        try {
            if (m_notificationManager == null) {
                m_notificationManager = (NotificationManager)m_instance.getSystemService(Context.NOTIFICATION_SERVICE);
                m_builder = new Notification.Builder(m_instance);
                m_builder.setSmallIcon(R.drawable.icon);
                m_builder.setContentTitle("A message from Qt!");
            }

            m_builder.setContentText(s);
            m_notificationManager.notify(1, m_builder.build());
        } catch(Throwable e) {
            e.printStackTrace();
        }
    }

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To me it appears that the 'm_instance' variable is null... but why? If I open and run the Notifier example, it works fine.