Calling a function when an activity is returned to from fragment

Calling a function when an activity is returned to from fragment

By : user2185738
Date : November 22 2020, 04:01 AM
I wish did fix the issue. Declare a interface inside fragment and implement it in your activity and send response to activity inside onDetach(),onDestroy or onPaused method of fragment, any of them which suits you. I will prefer onDetach or onDestroy
Here is sample for that:
code :
public class MyFragment extends Fragment {

    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return super.onCreateView(inflater, container, savedInstanceState);

    private Test mListener;

    public interface Test{
        void imLeavingYou();

    public void onAttach(Context context) {
        mListener = (Test) context;

    public void onDetach() {
        if(mListener != null){
public class MyActivity extends AppCompatActivity implements MyFragment.Test {

    protected void onCreate(Bundle savedInstanceState) {

    public void imLeavingYou() {
        // Okay thanks for informing

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Issue on calling function of Fragment Class from Activity

Issue on calling function of Fragment Class from Activity

By : Simon L
Date : March 29 2020, 07:55 AM
To fix this issue Please check what happened at the line TestFragment.isOnline(TestFragment.java:363)
My guess is getActivity() returns null. It means that your fragment hasn't attached to your activity. You will need to add fragment to the activity as descibed here How do I add a Fragment to an Activity with a programmatically created content view
Calling an activity with javascript function from fragment

Calling an activity with javascript function from fragment

By : SHG
Date : March 29 2020, 07:55 AM
I wish this helpful for you After a long struggle i solved my problem i just need to use this bit of code and now its working fine as i expected FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.frame_container, new ShowInfo()).commit();
java.lang.IllegalStateException: Activity has been destroyed at Calling fragment inside another fragment to replace on f

java.lang.IllegalStateException: Activity has been destroyed at Calling fragment inside another fragment to replace on f

By : Shashikiran B V
Date : March 29 2020, 07:55 AM
this one helps. I am new to android and learning fragment instead of multiple, i have problem. when i call planet fragment from friends "java.lang.IllegalStateException: Activity has been destroyed" android runtime FATAL exception occurs here is my code. i saw this page but couldn't figure out how to use it. I will be grateful for any help , To access an Activity, you shouldn't do this:
code :
MainActivity main = new MainActivity();
MainActivity main = getActivity();
Calling function from a Fragment ..No activity to handle error

Calling function from a Fragment ..No activity to handle error

By : Elias Slater
Date : March 29 2020, 07:55 AM
seems to work fine I saw many question related to this one but none solved my problem yet so I apologize if it was duplicated. , Use
code :
Uri.parse("tel:" + phone_number)
calling function of activity from fragment class gives NPE

calling function of activity from fragment class gives NPE

By : pcalonso
Date : March 29 2020, 07:55 AM
it should still fix some issue Your fragment is not always attached to an activity, so at times, getActivity() may return null.
Read about this Coordinating With The Activity Lifecycle.
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