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

In your onCreate method, use the following snippet:

this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);

Answer 2

You just need to change AppTheme style in Style.xml if you replace the definition from DarkActionBar

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

to NoActionBar

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">

the AppTheme defined in AndroidManifast.xml

Answer 3

In my case, if you are using android studio 2.1, and your compile SDK version is 6.0, then just go to your manifest.xml file, and change the following code:

Here is the code:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.lesterxu.testapp2">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppCompat.NoActionBar">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

And here is the snip shoot(see the highlight code):

Answer 4

when i tried to use all those high upvoted answers my app always crashed. (i think it has something to do with the "@android:style"?)

The best solution for me was to use the following:

android:theme="@style/Theme.AppCompat.NoActionBar"

No header / title bar anymore. Just place it in the <application>...</application> or <activity>...</activity> depending if you (don't) want it in the whole app or just a specific activity.

Answer 5

Add this style to your style.xml file

 <style name="AppTheme.NoActionBar">
     <item name="windowActionBar">false</item>
     <item name="windowNoTitle">true</item>
 </style>

After that reference this style name into your androidManifest.xml in perticular activity in which you don't want to see titlebar, as like below.

<activity android:name=".youractivityname"
     android:theme="@style/AppTheme.NoActionBar">
</activity>

Answer 6

Or if you want to hide/show the title bar at any point:

private void toggleFullscreen(boolean fullscreen)
{
    WindowManager.LayoutParams attrs = getWindow().getAttributes();
    if (fullscreen)
    {
        attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
    }
    else
    {
        attrs.flags &= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
    }
    getWindow().setAttributes(attrs);
}