NoSuchMethodError:The method ‘[]’ was called on null.

[qiaoshouqing]

I found that there were two things that would happen.

1. Ios system, zh Chinese. An error will be reported after killing the process and restart the application to translate the first string.
2. Occasionally. Problems can occur when switching to another page. And when you get back, the entire application will be in trouble.

Can it be solved in time?

NoSuchMethodError:The method ‘[]’ was called on null.
Receiver:null
Tried calling:[](“motto”)

[qiaoshouqing]

Using the latest version 0.6.3

[ilteoood]

Hi,
Without any code example is hard for me to replicate it.

[qiaoshouqing]

I submitted the error log. Can't the error log?

[ilteoood]

I need an example of:

• how you initialize it
• how you use it
• how you structured the assets folder

[ilteoood]

Also, did you set a fallback file?

I think that this problem is similar to #23.

[qiaoshouqing]

init

    localizationsDelegates: [
        FlutterI18nDelegate(
          useCountryCode: false,
          fallbackFile: "zh",
          path: "assets/flutter_i18n"
        ),
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate
      ],

use

In order to deal with the first error situation.

import 'package:flutter/material.dart';
import 'package:flutter_i18n/flutter_i18n.dart';

class LocalizationUtil {

  static String translate(BuildContext context, var key, [final Map<String, String> translationParams]) {
    try {
      return FlutterI18n.translate(context, key, translationParams);
    } catch(e) {
      print("FlutterI18n Exception:" + e.toString());
      return key;
    }
  }

}

LocalizationUtil.translate(context, "motto"),

file struct

- assets/flutter_i18n/
- assets/flutter_i18n/en.json
- assets/flutter_i18n/zh.json

[ilteoood]

Seems everything fine.
Can you tell me the output of the

• Localizations.localeOf
• FlutterI18N.currentLocale

methods?

[qiaoshouqing]

In Chinese.
flutter: Localizations.localeOf(context):en_US
flutter: FlutterI18n.currentLocale:zh_CN

[ilteoood]

Hi,
is it happening even with version 0.6.4?
Now with a MBP, I can test it even on iOS :)

[Shakle]

I tried to use to use localeResolutionCallback to autodetect language on first launch, but it works only on android, ios has an error described in this issue. Generally it returns deviceLocale = null; And I also did not understand what for does it need a return Locale here.

localeResolutionCallback: (deviceLocale, supportedLocales) {
        if (Database.initialApplicationLanguage == null && Platform.isAndroid) {
            Database.initialApplicationLanguage = Locale(deviceLocale.languageCode);
            Future.delayed(Duration.zero,
                    () => Language.provider(context).locale = Database.initialApplicationLanguage);
        }
        return deviceLocale;
      },

[ilteoood]

I'm closing it for inactivity.
For iOS related problems on automatic locale resolution, please use #58