Here I have created Action Bar in android. In android Action Bar is used to provide navigation and perform some actions.
In this blog I have implement a Action Bar in my Android project and perform actions such as switching fragment. Below example will described you how to make Action Bar in Android .

Step(1)-Main.xml.Layout-

<LinearLayout 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=".MainActivity">
<FrameLayout
    android:id="@+id/content_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

    </LinearLayout>

Step(2)-main_Fragment.layout-

  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="40dp"
        android:text="Main Layout"/>
</LinearLayout>

Step(3)-text_fragment-

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="40dp"
        android:id="@+id/txt"/>
</LinearLayout>

Step(4)-menu_main.xml-

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/action_speech"
        android:icon="@drawable/ic_action_location"
        android:showAsAction="ifRoom"
        android:title="Speech"/>
    <item android:id="@+id/action_call"
        android:icon="@drawable/ic_action_refresh"
        android:showAsAction="ifRoom"
        android:title="Call"/>
    <item android:id="@+id/action_done"
        android:icon="@drawable/ic_action_settings"
        android:showAsAction="ifRoom"
        android:title="Done"/>
    <item android:id="@+id/action_contacts"
        android:showAsAction="never"
        android:title="Contacts"/>
    <item android:id="@+id/action_settings"
        android:showAsAction="never"
        android:title="Settings"/>
    <item android:id="@+id/action_status"
        android:showAsAction="never"
        android:title="Status" />
</menu>

Step(5)-MainActivity-

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Fragment main = new Fragment();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.replace(R.id.content_frame, main);
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        ft.addToBackStack(null);
        ft.commit();
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();
        switch (id) {
            case R.id.action_call:
                Intent dialer= new Intent(Intent.ACTION_DIAL);
                startActivity(dialer);
                return true;
            case R.id.action_speech:
                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
                startActivityForResult(intent, 1234);

                return true;
            case R.id.action_done:

                Bundle args = new Bundle();
                args.putString("Menu", "You pressed done button.");
                Fragment detail = new TextFragment();
                detail.setArguments(args);
                FragmentManager fragmentManager = getFragmentManager();
                fragmentManager.beginTransaction().replace(R.id.content_frame, detail).commit();

                return true;
            case R.id.action_contacts:
                Toast.makeText(getApplicationContext(), "Contacts Clicked", Toast.LENGTH_SHORT).show();
                return true;
            case R.id.action_settings:
                Toast.makeText(getApplicationContext(),"Settings Clicked",Toast.LENGTH_SHORT).show();
                return true;
            case R.id.action_status:
                Toast.makeText(getApplicationContext(),"Status Clicked",Toast.LENGTH_SHORT).show();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 1234 && resultCode == RESULT_OK) {
            String voice_text = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS).get(0);
            Toast.makeText(getApplicationContext(),voice_text,Toast.LENGTH_LONG).show();

        }
    }
}

Step(6)-Create MainFragment class-

public class MainFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.main_fragment, container, false);

        return view;
    }

}

Step(7)-Create TextFragment class-

public class TextFragment extends Fragment {
   TextView text;

    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.text_fragment, container, false);
        text= (TextView) view.findViewById(R.id.txt);
        String menu = getArguments().getString("Menu");
        text.setText(menu);
        return view;
    }
}