[android] 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?

Instead of

extends Fragment

use

extends android.support.v4.app.Fragment 

This works for me. for *API14 and above

get current activity from parent, then using this code

getActivity().getSupportFragmentManager()

import

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

I used FragmentActivity

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

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

FragmentManager fragMan = getFragmentManager();

getCurrentActivity().getFragmentManager()

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

extend class to AppCompatActivity instead of Activity