How to make a list using fragments

I am having probelmas trying to show a list inside of a fragment, inside activity_main I have the following code, that for the moment it only shows a textview with a phrase and if I keep it that way the menu I am using works for me (template of android menu below) and I can navigate from one fragment to another, but if I change the textview to a list when I try to change from one fragment to another, it does not work. The list is visible but not the content I have in the other fragments, and my The main fragment has to show the list.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/content_main"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/main_layouts"
        android:layout_alignParentTop="true"
        android:orientation="horizontal">

        <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:layout_gravity="center"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
        android:text="TextView" />
        <!--<ListView-->
            <!--android:layout_width="fill_parent"-->
            <!--android:layout_height="wrap_content"-->
            <!--android:paddingTop="60dp"-->
            <!--android:paddingBottom="60dp"-->
            <!--android:layout_marginLeft="20dp"-->
            <!--android:layout_marginRight="20dp"-->
            <!--android:divider="@null"-->
            <!--android:id="@+id/listview">-->
        <!--</ListView>-->

    </LinearLayout>
</RelativeLayout>

Lists: Java of a fragment, the 4 fagments by the omentum are identical

public class Lista extends Fragment {

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_listas, container, false);
    }
}

fragment_listsa.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Agendas">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Agendas"
        android:textSize="20sp"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Large"
        android:id="@+id/textView6"
        />
</RelativeLayout>