Android Fragment

1. add a fragment to a view

FragmentManager fm = getFragmentManager();

FragmentTransaction ft = fm.beginTransaction();

ft.add(R.id.fragment_container, mFriendsFragment);

ft.addToBackStack(null);// this is optional, use this if you want to come back to the old fragment

ft.commit();

main activity view

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

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/fragment_container"

    android:layout_width="match_parent"

    android:layout_height="match_parent" />