Set default for SystemUiMode to Edge-to-Edge

To opt out of edge-to-edge on Android SDK 15, specify the new style attribute in each activity that requires it. If you have a parent style that child styles need to opt out of, you can modify the parent only. In the following example, update the style configuration generated from flutter create.

By default, the styles used in a Flutter app are set in the Android manifest file (your_app/android/app/src/main/AndroidManifest.xml). Generally, styles are denoted by @style and help theme your app. Modify these default styles in your manifest file:

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application ...>
        <activity ...>
            <!-- Style to modify: -->
            <meta-data
              android:name="io.flutter.embedding.android.NormalTheme"
              android:resource="@style/NormalTheme"
            />
        </activity>
    </application>
</manifest>

Locate the style definition in: your_app/android/app/src/main/res/values/styles.xml.

Add the following attribute to the appropriate styles:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
        ...
        <!-- Add the following line: -->
        <item name="android:windowOptOutEdgeToEdgeEnforcement">true</item>
    </style>
    ...
    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
        ...
	      <!-- Add the following line: -->
        <item name="android:windowOptOutEdgeToEdgeEnforcement">true</item>
    </style>
</resources>

Make sure to apply the same change in the night mode styles file as well: your_app/android/app/src/main/res/values-night/styles.xml.

Ensure both styles are updated consistently in both files.

This modified style opts your app out of edge-to-edge for apps targeting Android SDK 15.

create a your_app/android/app/src/main/res/values-35 resource directory that contains styles without the android:windowOptOutEdgeToEdgeEnforcement attribute.

Starting in Flutter 3.27, Flutter apps target Android 15 by default, so if you wish to use this version and not manually set a lower target SDK version for your Flutter app, follow the preceding migration steps to maintain an unset or non-edge-to-edge SystemUiMode.

Landed in version: 3.26.0-0.0.pre Stable release: 3.27