Android Development hidden title bar issues

The first way:

Requestwindowfeature (Window.feature_no_title);

Note that this method is not used when the inherited class is appcompatactivity, as follows, to change it to activity

public class Mainactivity extends appcompatactivity

The correct wording is:

public class Mainactivity extends activity {//Inherit activity//... @Override protected V        OID onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Requestwindowfeature (Window.feature_no_title);        Written in front of the Setcontentview () function Setcontentview (R.layout.activity_listview); //...    }

The second way:

Getsupportactionbar (). Hide ();

The inherited class is appcompatactivity, as follows

public class Mainactivity extends appcompatactivity {@Override protected void onCreate (Bundle savedinstancestate) {        Super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_listview);          Getsupportactionbar (). Hide (); Written behind the Setcontentview () function//...}

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Android Development hidden title bar issues