Flutter io.flutter.app.FlutterActivity' is already defined in a single-type import

Question

I am developing a Flutter application for Android, which sends daily notifications. To keep things local, I tried to implement this using Android background services. I followed this tutorial: https://www.youtube.com/watch?v=NXuAzXY_KOo

import android.content.Intent;
import android.os.Build;
import android.os.Bundle;

import androidx.annotation.NonNull;

import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;

import io.flutter.embedding.android.FlutterActivity;
import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {

    private Intent foreService;

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        FlutterEngineGetter flutterEngineGetter = new FlutterEngineGetter();
        GeneratedPluginRegistrant.registerWith(getFlutterEngine());
        foreService = new Intent(MainActivity.this, MyService.class);

        new MethodChannel(getFlutterView(), "key_01")
                .setMethodCallHandler(new MethodChannel.MethodCallHandler() {
            @Override
            public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
                if(call.method.equals("startService")){
                    startService();
                }
            }
        });
    }
    private void startService(){
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            startForegroundService(foreService);
        }
        else {
            startService(foreService);
        }
    }

}

I get two errors, the first one is io.flutter.embedding.android.FlutterActivity is already defined in a single type of import. As far as I understand the problem, which causes this is that there are two classes called FlutterActivity, but I need both of them, to use getFlutterEngine() and getFlutterView() methods. How could I import only one method from a class?
The second error is Cannot resolve method 'getFlutterView' in 'MainActivity', I think solving the first one would solve this.
Thanks for your time and help in advance!

user_4936904 · Answer

The io.flutter.app.FlutterActivity has been deprecated (in Sep 2020)

Deprecation: FlutterActivity is the new API that now replaces this class. See https://flutter.dev/go/android-project-migration for more migration details.

in order to favor io.flutter.embedding.android.FlutterActivity so to fix the issues:

Remove import io.flutter.app.FlutterActivity; to use embedding.android.FlutterActivity

Use getFlutterEngine().getDartExecutor().getBinaryMessenger() instead of getFlutterView() to create and register MethodChannel as:

 new MethodChannel(getFlutterEngine().getDartExecutor().getBinaryMessenger(), "key_01")
         .setMethodCallHandler(new MethodChannel.MethodCallHandler() {
     @Override
     public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
         if(call.method.equals("startService")){
             startService();
         }
     }
 });

Alternately, you can override configureFlutterEngine to get the flutterEngine instance in order to create MethodChannel.

Flutter io.flutter.app.FlutterActivity' is already defined in a single-type import

1 Answers