flutter native splash

 In Flutter, you can create a native splash screen by creating a splash screen Android theme and set the windowBackground to your splash screen image. Here is an example of how you can do this:

1. Create a drawable resource for your splash screen image and place it in the res/drawable folder of your Android project.

2. In your res/values/styles.xml file, create a new style for your splash screen theme:

<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
  <item name="android:windowBackground">@drawable/splash_screen</item>
</style>

3. In your AndroidManifest.xml file, set the android:theme attribute of the <activity> element to @style/SplashTheme:

<activity
  android:name=".MainActivity"
  android:theme="@style/SplashTheme"
  android:launchMode="singleTop">
  <intent-filter>
    <action android:name="android.intent.action.MAIN"/>
    <category android:name="android.intent.category.LAUNCHER"/>
  </intent-filter>
</activity>

This will display the splash screen image as the background for the MainActivity when the app is launched. You can then use a FlutterAppDelegate subclass to switch to the Flutter app's main screen after a short delay.

import io.flutter.app.FlutterActivity

class MainActivity: FlutterActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    // Set up a timer to switch to the Flutter app's main screen after a delay
    Handler().postDelayed({
      startActivity(Intent(this, FlutterMainActivity::class.java))
      finish()
    }, SPLASH_SCREEN_DELAY)
  }
}