access parent fragment by child fragment

问题

this is my child fragment and how to access my parent fragment from this fragment please help me to fix it

public class Profilefragmant extends Fragment {
public Profilefragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.profile_layout, container, false);

    TextView VE = (TextView) rootView.findViewById(R.id.profile_view_enquiry);
    VE.setOnClickListener(new View.OnClickListener(){
        public void onClick (View view){
            Fragment fragment = null;

            fragment = new Enquiryfragment();
            replaceFragment(fragment);
        }
    });



    return rootView;
}
public void replaceFragment(Fragment someFragment) {
    android.support.v4.app.FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.replace(R.id.containerView, someFragment);
    transaction.addToBackStack(null);
    transaction.commit();
}
}

this is my error while run the project

 java.lang.IllegalArgumentException: No view found for id 0x7f0c0099 (com.knrmarine.knr:id/containerView) for fragment EnquiryActivity{3754711 #2 id=0x7f0c0099}

This my Enquiryfragment code :

public class Enquiryfragmant extends Fragment {
public Enquiryfragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.enquiry_layout, container, false);
return rootView;}}

回答1:

You can get parent Fragment's reference by :

ParentFragment parentFrag = ((ParentFragment)ChildFragment.this.getParentFragment());
parentFrag.someMethod();

I used this in my ViewPager. If you have other requirement, Interface or EventBus are two of the general ones.

回答2:

Late answer but there is a quite simple way to access a fragment's parent fragment :

Kotlin

(parentFragment as YourParentFragment).parentFragmentMethod()

Java

((YourParentFragment) getParentFragment()).parentFragmentMethod();

回答3:

Access Parent Fragment Method from Child Fragment

((YourParentFragmentName) getParentFragment()).yourParentFragmentMethod();

Access Child Fragment Method from Parent Fragment

YourChildFragmentName fragment = (YourChildFragmentName) getChildFragmentManager().getFragments().get(positionOfYourChildFragment);
fragment.yourChildFragmentMethod();

回答4:

Above method did not worked for me (API 26). I found out a new solution here:

Fragment fragment = getActivity().getSupportFragmentManager().findFragmentByTag("MyFragment");

if(fragment != null && fragment instanceof MyFragment)
     ((MyFragment) fragment).someMethod();
else
     Log.e(TAG, "cannot change tab its null...");

来源：https://stackoverflow.com/questions/42695866/access-parent-fragment-by-child-fragment

标签

android

android-layout

android-fragments