How to hide Actionbar in Android

Sometimes the top of the activity we need to customize the style, this time we need to hide actionbar. Two different ways:

1. Hide by Android:theme= "" Property in the configuration file:   

<activity     android:name= ". Mainactivity "     android:label=" @string/app_name "     <!--this line of code can hide Actionbar---     android:theme=" @ Android:style/theme.light.notitlebar ">     <intent-filter>        <action android:name=" Android.intent.action.MAIN "/>        <category android:name=" Android.intent.category.LAUNCHER "/>     </intent-filter></activity>

2. Hide in activity code:

public class Mainactivity extends Activity {    ActionBar ActionBar;//Declaration ActionBar    @Override    protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); ActionBar = Getactionbar (); Get  to Actionbaractionbar.hide (); Hide Actionbar    }}

How to hide Actionbar in Android