[KEY : ANDROID FRAGMENT, ACTIVITY, ADD FRAGMENT TO ACTIVITY]

Add Fragment to Activity

1. Create simple activity with xml.
2. Go to xml file add framelayout and assign id to it as follow:

    <FrameLayout
           android:id="@+id/your_frame_layout"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:clickable="true" />

3. Create java class with name like "MyFirstFragment.java" and extend fragment.
4. Go to activity add the following code :

   Fragment myFragment = new MyFirstFragment();
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fTransaction = fragmentManager
      .beginTransaction()
      .replace(R.id.your_frame_layout, bodyFragment)
      .addToBackStack("myprofile");
      
    fTransaction.commit();