how to call function from other fragment class

Question

I'm trying to call this function public void arrowClick()

is inside my main fragment public class CounterMain extends Fragment implements View.OnClickListener{

the fragment is extend android.support.v4.app.Fragment

I want to call this function from another Custmoe Dialog fragment

public class CustmoeDialog extends DialogFragment {

I tried ((CounterMain)getActivity()).arrowClick();

but I can't use it it says android.support.v4.app.Fragment cannot be cast to my.example.CounterMain

and the

CounterMain x = new CounterMain(); x.arrowClick();

it makes my app to stop working when I call it

any help?

Answer 1

You can call activity method by this way

((YourActivityClassName)getActivity()).yourPublicMethod();

and from activity you can directly call by this way

FragmentManager fm = getSupportFragmentManager();//if added by xml
YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentById(R.id.your_fragment_id);
fragment.yourPublicMethod();

if you added fragment via code and used a tag string when you added your fragment, use findFragmentByTag instead:

YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentByTag("yourTag");