Why is AppTheme.NoActionBar not working?

Question

I've created an Android app in Android Studio, and it has created these styles by default:

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

However, in an activity, I try to set this as a theme:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
   ...
android:theme="@style/AppTheme.NoActionBar">

But when I run the app I'm getting the action bar:

Why am I getting an action bar? Am I doing something obviously wrong, or is Android Studio, Google's official IDE for it's own platform, trying to confuse/mislead its developers?

Here is my activity code, there's nothing in it that can cause the action bar to appear by itself:

public class WelcomeActivity extends AppCompatActivity {
    @Override
    public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
        super.onCreate(savedInstanceState, persistentState);
        setContentView(R.layout.activity_welcome);
    }
}

Solution 1

Try something like this:

<style name="AppTheme.NoActionBar">
    <item name="windowNoTitle">true</item>
    <item name="windowActionBar">false</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
  </style>

and set this as the theme of your activity in the manifest, that is:

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

Solution 2

None of the other answers worked for me, but I found this solution:

Open values/styles.xml in Android Studio and change this:

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

to:

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- changed .DarkActionBar to .NoActionBar -->
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

Solution 3

If you just let Android Studio auto generate the activity, look in activity_welcome. There is be android.support.design.widget.AppBarLayout and if you delete it, the ActionBar should be gone.

Solution 4

You might have an action bar in your layout, or set theme in AndroidManifest file

Solution 5

Once WelcomeActivity extends AppCompatActivity, try Theme.AppCompat.NoActionBar:

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

If not already done, include a version of appcompat library to your build.gradle:

dependencies {
    compile 'com.android.support:appcompat-v7:24.1.1'
}

View more solutions

Comments

[IntelliJ Amiya]

add <item name="android:windowFullscreen">true</item> <item name="android:windowContentOverlay">@null</item>

[wonsuc]

You saved me. Thanks.

[LarsH]

Can you explain why the user's code didn't work as he expected?

[Mehmet K]

AppTheme.NoActionBar already declares AppTheme as the parent theme. The period does that

[Mehmet K]

The theme AppTheme.NoActionBar and the elements used in it are activity styling. Applying it to a FrameLayout inside an Activity does not affect the parent activity styling.

[Android Dev]

omgggg thank you!!!!!!! I have been searching EVERYWHERE