• In your android/app/build.gradle, update your minSdkVersion in your default config :
defaultConfig {
        // others configs
        minSdkVersion 21
  • If you are using FlutterActivity directly, change it to FlutterFragmentActivity in your AndroidManifest.xml.

  • If you are using a custom activity, update your MainActivity.java:

    import io.flutter.embedding.android.FlutterFragmentActivity;
    public class MainActivity extends FlutterFragmentActivity {
        // ...

    or MainActivity.kt:

    import io.flutter.embedding.android.FlutterFragmentActivity
    class MainActivity: FlutterFragmentActivity() {
        // ...

    to inherit from FlutterFragmentActivity.

  • Use a theme that inherits MaterialTheme for the Android theme to apply to the FlutterFragmentActivity as soon as the Android process has started

    For example :

    • In your android/app/build.gradle, you can add this dependency
    dependencies {
      implementation "com.google.android.material:material:1.5.0"
      // your others dependencies
    • In your android/app/src/main/res/values/styles.xml

      <!-- Theme applied to the Android Window as soon as the process has started.
              This theme determines the color of the Android Window while your
              Flutter UI initializes, as well as behind your Flutter UI while its
              This Theme is only used starting with V2 of Flutter's Android embedding. -->
          <style name="NormalTheme" parent="@style/Theme.Material3.Light.NoActionBar">
              <!-- Or any other material theme that you want -->
              <item name="android:windowBackground">?android:colorBackground</item>

      Don't forget to change it as well in your android/app/src/main/res/values-night/styles.xml if you need to



  • In your ios/Podfile, update your ios sdk version :
platform :ios, '11.0'

About Lyra

This sdk is the flutter interface implementation of the android and ios sdks of Lyra

If you want more informations about Lyra, here is their website

👉 About Bam

We are a 100 people company developing and designing multiplatform applications with React Native and Flutter using the Lean & Agile methodology. To get more information on the solutions that would suit your needs, feel free to get in touch by email or through contact form!

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