Android (notifications) - C++ Code turns on bluetooth - but no notification is shown in Notification Bar

Hey Guys. I'm working with a collegue on a android app. At some point the app starts Bluetooth by itself without user interaction. This is written in C++. Now I want to turn the main Bluetooth Symbol on, to inform the user that Bluetooth is turned on.The same for WiFi.

I could create my own notifications, but that's 开发者_运维问答not what I want.

How can I access the main notification symbols in Java?

Another question about notifications: I have a notification for my main app. Every time I click on the notification the app is restarted (onCreate is called). When I click the Home Button, when my app is in the front is shows the home screen and by clicking on the app symbol it resumes the app (onResume is called). I want exactly the same behaviour when I click on the notification. How do I achieve this?

thanks in advance

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Afaik, this works only if you call it from Java, or call into corresponding Java methods via JNI, which will update the proper notifications for you.