[📚] Appcheck debug build

[cedvdb]

Firebase official documentation says the following :

In your debug build, configure App Check to use the debug provider factory: [code snippet]

Flutter fire documentation says the following

Install the debug provider using the following snippet, e.g. in your MainActivity.java onCreate method:

import com.google.firebase.appcheck.FirebaseAppCheck;

FirebaseApp.initializeApp(/*context=*/ this);
FirebaseAppCheck firebaseAppCheck = FirebaseAppCheck.getInstance();
firebaseAppCheck.installAppCheckProviderFactory(
    DebugAppCheckProviderFactory.getInstance());

The documentation is specifically unclear about debug build. I assume that the above snippet should not be added to the main/MainActivity.kt but to a debug variant. So I tried to create `debug/com/cedvdb/x/MainActivity.kt but this throws the error:

e: Redeclaration: MainActivity

It seems like the debug variant cannot be redeclared like this, but then how ?

It would be nice if the appcheck documentation was updated to cover that debug build point, taking into account that some are not familiar with kotlin.

My final snippet that compiles is:

import io.flutter.embedding.android.FlutterActivity
import android.os.Bundle


import com.google.firebase.FirebaseApp
import com.google.firebase.appcheck.FirebaseAppCheck
import com.google.firebase.appcheck.debug.DebugAppCheckProviderFactory

class MainActivity: FlutterActivity() {
  
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    FirebaseApp.initializeApp(/*context=*/this)
    val firebaseAppCheck = FirebaseAppCheck.getInstance()
    firebaseAppCheck.installAppCheckProviderFactory(
        DebugAppCheckProviderFactory.getInstance()
    )
  }
}

[gOzaru]

I got this problem too on Android emulator.
There is no a useful documentation from Firebase nor FlutterFire

[cedvdb]

don't forget to 👍 for visibility

[rohan20]

Using a MethodChannel, you can control that the method channel gets invoked only in kDebugMode from Flutter: https://stackoverflow.com/a/73330541/5066615

[russellwheatley]

If you wish to follow steps for setting up app check debug, please follow instruction here for android & iOS.