Argthtjtr

I have a custom fragment in a inflated layout, how to access it?
I have tried many ways after inflated, but none of them worked:

1. 
   getTransitionManager().findFragmentById(id_xxxxx) returns null;


2. 
   getChildAt(x), get a View but not be able to cast to fragment;


3. I Tried to create a new fragment programmatically, and add to a container in the inflated view, but the app crashed says "No view found for id xxx for fragment fff"

code, I want to find ReportCalenderFragment and hold it:

    @Override

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    ...



    LayoutInflater inflater = LayoutInflater.from(getActivity());

    mCalendar = inflater.inflate(R.layout.dlg_choose_report, null);



    ConstraintLayout ly = (ConstraintLayout)mCalendar;

    RelativeLayout rly = (RelativeLayout)ly.getChildAt(0);

    LinearLayout lly = (LinearLayout)rly.getChildAt(0);

    View v = (View)lly.getChildAt(0);



    //lly.setId(R.id.report_calendar_con);

    //ReportCalenderFragment frag = new ReportCalenderFragment();

    //FragmentTransaction fragTrans = getChildFragmentManager().beginTransaction();

    //fragTrans.add(R.id.report_calendar_con, frag);

    //fragTrans.commit();

    //ReportCalenderFragment frag = (ReportCalenderFragment)lly.getChildAt(0);



    ...

}

XML, ConstraintLayout was filtered by this text editor:

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout

    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"

    android:layout_height="match_parent">



    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content">



        <LinearLayout

            android:id="@+id/report_calendar_con"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_centerHorizontal="true"

            android:background="#000"

            android:orientation="vertical">



            <fragment

                android:id="@+id/frag_calendar_rp"

                android:name="package.fragments.ReportCalenderFragment"

                android:layout_width="match_parent"

                android:layout_height="wrap_content"

                android:layout_centerHorizontal="true" />

        </LinearLayout>



    </RelativeLayout>



</android.support.constraint.ConstraintLayout>

Try

ReportCalenderFragment frag  = (ReportCalenderFragment) getParentFragment().getFragmentManager().findFragmentById(R.id.frag_calendar_rp);

If you are using ReportCalenderFragment inside a dialog, which is inside another fragment

You should use the ChildFragmentmanager from parent fragment while showing the dialog

MyDialogFragment dialogFragment = new MyDialogFragment();

dialogFragment.show(getChildFragmentManager(), "dialog");

Like this：

@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_test);

        ReportCalenderFragment fragment= (ReportCalenderFragment) getSupportFragmentManager().findFragmentById(R.id.frag_calendar_rp);//this method

        Log.e(getClass().getSimpleName(),fragment.toString());

    }