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copied!<p>In your activity:</p> <pre><code>public void setActionBarTitle(String title) { getSupportActionBar().setTitle(title); } </code></pre> <p>And in your fragment:</p> <pre><code>public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Set title bar ((MainFragmentActivity) getActivity()) .setActionBarTitle("Your title"); } </code></pre> <p><strong>===Update April, 10, 2015===</strong></p> <p>You should use listener to update your action bar title</p> <p>Fragment:</p> <pre><code>public class UpdateActionBarTitleFragment extends Fragment { private OnFragmentInteractionListener mListener; public UpdateActionBarTitleFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (mListener != null) { mListener.onFragmentInteraction("Custom Title"); } return inflater.inflate(R.layout.fragment_update_action_bar_title2, container, false); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (OnFragmentInteractionListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnFragmentInteractionListener"); } } @Override public void onDetach() { super.onDetach(); mListener = null; } public interface OnFragmentInteractionListener { public void onFragmentInteraction(String title); } </code></pre> <p>}</p> <p>And Activity:</p> <pre><code>public class UpdateActionBarTitleActivity extends ActionBarActivity implements UpdateActionBarTitleFragment.OnFragmentInteractionListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_update_action_bar_title); } @Override public void onFragmentInteraction(String title) { getSupportActionBar().setTitle(title); } </code></pre> <p>}</p> <p>Read more here: <a href="https://developer.android.com/training/basics/fragments/communicating.html">https://developer.android.com/training/basics/fragments/communicating.html</a></p>

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