flutter 设置初始启动页

需求: 比如推送进入打开后自己进入的是某个内页, 而不是平时的首页面
参考文档:
https://gist.github.com/mravn-google/73d813cc0634b9c0639d38c82ef78ad2
https://github.com/flutter/flutter/issues/10884

java层代码:

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

import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.view.FlutterView;
import android.view.WindowManager.LayoutParams;


public class MainActivity extends FlutterActivity {
    private static final String CHANNEL = "samples.flutter.io/battery";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        GeneratedPluginRegistrant.registerWith(this);
    }

    @Override
    public FlutterView createFlutterView(Context context) {
        final FlutterView view = new FlutterView(this);
        view.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        setContentView(view);
        final String route = "/testView";
        if (route != null) {
            view.setInitialRoute(route);
        }
        return view;
    }
}

dart层代码:

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {

    final routes = {
      '/': (BuildContext ctx) => centeredText('Root'),
      '/its/a/long/and/winding/road': (BuildContext ctx) =>
          centeredText('Long and winding road')
    };

   return new MaterialApp(
      routes: routes,
      //home: new MyHomePage(),
      // Forces use of initial route from platform (otherwise it defaults to /
      // and platform's initial route is ignored).
      initialRoute: null,
      // Used when launched with unknown deep link.
      // May do programmatic parsing of routing path here.
      onGenerateRoute: (RouteSettings settings) {
        return new MaterialPageRoute(
          builder: (BuildContext ctx) {
            return centeredText('Not found:' + settings.name);
          },
        );
      }
    );
  }

  Widget centeredText(String text) {
    return new Scaffold(body: new Center(child: new Text(text)));
  }
}