Function register

packages/firebase-ui/index.android.ts:562–592

(args: any)

let _launcherResolve;
let _launcherReject;
function register(args: any) {
	if (!lastActivity) {
		// Some activities do not implement activity result API
		if (args.activity.registerForActivityResult) {
			lastActivity = new WeakRef(args.activity);
			signInLauncher = args.activity.registerForActivityResult(
				new com.firebase.ui.auth.FirebaseAuthUIActivityResultContract(),
				new androidx.activity.result.ActivityResultCallback<com.firebase.ui.auth.data.model.FirebaseAuthUIAuthenticationResult>({
					onActivityResult(result) {
						const code = result.getResultCode();
						if ((code?.intValue() || code === java.lang.Integer.valueOf(android.app.Activity.RESULT_OK)) === android.app.Activity.RESULT_OK) {
							const response = result.getIdpResponse();
							if (response.isSuccessful()) {
								_launcherResolve(IdpResponse.fromNative(response));
							} else {
								_launcherReject(FirebaseError.fromNative(response.getError()));
							}
						} else {
							_launcherReject(FirebaseError.fromNative(null, 'User Cancelled'));
						}

						_launcherResolve = null;
						_launcherReject = null;
					},
				})
			);
		} else {
			Application.android.once('activityCreated', register);
		}
	}
}

Application.android.once('activityCreated', register);