Detect when fragment becomes visible [duplicate]

Answer 1

You could send an event to your activity when the fragment is started : https://www.inkling.com/read/programming-android-mednieks-1st/chapter-11/visualizing-the-fragment-life

By overriding the onStart method :

@Override
public void onStart() {
    super.onStart();
    ((MyInterface)getActivity()).onFragmentIsVisible( this );
}

Where MyInterfaceis an interface :

public MyInterface {
   public void onFragmentVisible( Fragment fragment );
}

and your activity will have to implement it.

This could be more easy with an event bus library like

• RoboGuice's event bus
• Otto
• EventBus