Cannot call getSupportFragmentManager() from activity

I have an activity which has a fragment.

XML:

 <fragment android:name="com.example.androidcalculator.ResultFragment"
            android:id="@+id/result_fragment"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

And I want to call a method from ResultFragment from a method in the Activity, but getSupportFragmentManager "doesn't exist":

FragmentManager fragMan = getSupportFragmentManager();

How can I resolve this?

Your activity doesn't extend FragmentActivity from the support library, therefore the method is not present in the superclass

If you are targeting api 11 or above, you could use Activity.getFragmentManager instead.

extend class to AppCompatActivity instead of Activity

get current activity from parent, then using this code

getActivity().getSupportFragmentManager()

Simply Use

 FragmentManager fm = getActivity().getSupportFragmentManager();

Remember always when accessing fragment inflating in MainLayout use Casting or getActivity().

You need to extend FragmentActivity instead of Activity

import

import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;

This worked for me. Running android API 19 and above.

FragmentManager fragMan = getFragmentManager();

getCurrentActivity().getFragmentManager()

Instead of

extends Fragment

use

extends android.support.v4.app.Fragment 

This works for me. for *API14 and above

I used FragmentActivity

TabAdapter = new TabPagerAdapter(((FragmentActivity) getActivity()).getSupportFragmentManager());