Create a custom adapter for list view, inside getview method do the following

• Create an xml file

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:orientation="vertical"
            android:layout&#95;width="match&#95;parent"
            android:layout&#95;height="match&#95;parent">
  
  
  <TextView
      android:id="@+id/list&#95;header"
      android:layout&#95;width="wrap&#95;content"
      android:layout&#95;height="wrap&#95;content"
      android:text="I am new header"/>
  
  
  <TextView
      android:id="@+id/item"
      android:layout&#95;width="match&#95;parent"
            android:layout&#95;height="wrap&#95;content"
            android:gravity="center"
      android:text="i am list item"/> 
   </LinearLayout>
  

  // in above code please replace _ with _ (underscore) Inside get view method check the object like it belongs to which model and and then hide or show the header.

  if(object belongs to the previous model object){
       list_header.setVisiblity(View.GONE);
    }else{
         list_header.setVisiblity(View.VISIBLE);
         list_header.setText(MODAL Class name);
    }

Modify the code as your requirement but logic will be same.

Are you using same layout for list row in each section header ??