Flutter：窗口小部件未在发行版APK中加载

Question

我在实际设备上测试发行版apk时遇到一些麻烦，这些应用程序在调试模式下可以正常工作，但是发行版apk中没有加载许多小部件。

调试：

版本：

我是否需要对发布apk进行任何设置？

p.s。我已经在AndroidManifest上添加了INTERNET和ACCESS_NETWORK_STATE权限

编辑： 我的main.dart

void main() async {
  // Set default home.
  Widget _defaultHome = new LoginScreen();

  SharedPreferences preferences = await SharedPreferences.getInstance();
  bool isloggedin =  preferences.getBool("isLoggedin");



  if (isloggedin != null && isloggedin) {
    _defaultHome = new Home();
  }


  runApp(new StateWidget(
      child: new MaterialApp(
        title: 'Firebase Login Demo',
        theme: buildTheme(), 
        debugShowCheckedModeBanner: false,
        home: _defaultHome,
        routes: <String, WidgetBuilder>{
          '/home' : (BuildContext context) => new Home(),
          '/login' : (BuildContext context) => new LoginScreen(),
        },

      )
    ));
}

我的login.dart：

class LoginScreen  extends StatefulWidget {
  @override
  _LoginScreenState createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {

  StateModel appState;

  BoxDecoration _buildBackground() {
      return BoxDecoration(
        image: DecorationImage(
          image: AssetImage("assets/images/back.jpg"),
          fit: BoxFit.cover,
        ),
      );
    }


  @override
  void initState() {
    super.initState();

  }


  @override
  Widget build(BuildContext context) {

    appState = StateWidget.of(context).state;

      return Scaffold(
        body: Container(
          decoration: _buildBackground() , 
          child: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                //_buildText(),
                // Space between "Recipes" and the button:

                SizedBox(height: 300.0),

                GoogleSignInButton(
                  onPressed: ()  async {

                      await signInWithGoogle(context);

                      bool isloggedin = appState.isLoggedin;

                      if (isloggedin) {
                        Navigator.pushReplacement(context,
                          MaterialPageRoute(
                            builder: (context) => new Home(),
                          ),
                        );
                      }
                  }
                ),

                SizedBox(height: 40.0),

                FacebookSignInButton(
                  onPressed: ()  async {


                    await signInWithFacebook(context);

                    bool isloggedin = appState.isLoggedin;



                      if (isloggedin) {
                        Navigator.pushReplacement(context,
                          MaterialPageRoute(
                            builder: (context) => new Home(),
                          ),
                        );
                      }

                  }
                ),
              ],
            ),
          ),
        ),
      );
    }




}