How to hide the title bar for an Activity in XML with existing custom theme

Question

I want to hide the titlebar for some of my activities. The problem is that I applied a style to all my activities, therefore I can\'t simply set the theme to @android:

Answer 1

the correct answer probably is to not extend ActionbarActivity rather extend just Activity

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if you still use actionbar activity seems this is working:

@Override
protected void onCreate(Bundle savedInstanceState) {          
    super.onCreate(savedInstanceState);
    getSupportActionBar().hide(); //<< this
    setContentView(R.layout.activity_main);
}

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seems this works too:

styles.xml:

   

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i could do like as Scott Biggs wrote. this kind of works. except there is no theme then. i mean the settings menu's background is transparent:

just change

public class MainActivity extends ActionBarActivity {

to Activity or FragmentActivity

public class MainActivity extends Activity  {

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however i could make it look good enough using material design and not remove the actionbar: https://gist.github.com/shimondoodkin/86e56b3351b704a05e53

1. set icon of application
2. set colors of action bar to match design.
3. set icon to settings menu
4. add more icons (buttons on top)

it is by example of material design compatibility actionbar styling.