更改 android 语言环境时保持当前 sharedPreferences答案

【问题标题】：Keep current sharedPreferences when android locale language is changed更改 android 语言环境时保持当前 sharedPreferences
【发布时间】：2019-06-08 22:36:43
【问题描述】：

当我更改手机的区域设置/语言时，保存在 sharedPreference 上的参数（选择的主题和翻译功能的目标语言）会变为默认值。例如，首选项的默认值是主题的“light”和目标语言的“en”。我将首选项更改为主题的“dark”和目标语言的“de”。如果我从“设置”中更改语言环境，主题偏好会变为“浅色”，目标语言偏好会再次变为“en”。如何防止这种变化？

我已经尝试过 onConfigurationChanged() 方法，但它只在活动运行时触发。在 Activity 未运行时更改区域设置时不会触发它。

这里是onPreferenceChange(Preference preference, Object value)方法：

        String stringValueLanguage = value.toString();
        preference.setSummary(stringValueLanguage);

        switch (stringValueLanguage) {

            //Language selection preference is set according to different locales:
            case LanguagesEN.Constants.ENGLISH_VALUE:
            case LanguagesTR.Constants.ENGLISH_VALUE:
            case LanguagesDE.Constants.ENGLISH_VALUE:
            case LanguagesES.Constants.ENGLISH_VALUE:
            case LanguagesFR.Constants.ENGLISH_VALUE:
                language = LanguageCodes.Constants.ENGLISH_CODE_VALUE;
                break;

            case LanguagesEN.Constants.TURKISH_VALUE:
            case LanguagesTR.Constants.TURKISH_VALUE:
            case LanguagesDE.Constants.TURKISH_VALUE:
            case LanguagesES.Constants.TURKISH_VALUE:
            case LanguagesFR.Constants.TURKISH_VALUE:
                language = LanguageCodes.Constants.TURKISH_CODE_VALUE;
                break;

            case (LanguagesEN.Constants.GERMAN_VALUE):
            case (LanguagesTR.Constants.GERMAN_VALUE):
            case (LanguagesDE.Constants.GERMAN_VALUE):
            case (LanguagesES.Constants.GERMAN_VALUE):
            case (LanguagesFR.Constants.GERMAN_VALUE):
                language = LanguageCodes.Constants.GERMAN_CODE_VALUE;
                break;

            case (LanguagesEN.Constants.FRENCH_VALUE):
            case (LanguagesTR.Constants.FRENCH_VALUE):
            case (LanguagesDE.Constants.FRENCH_VALUE):
            case (LanguagesES.Constants.FRENCH_VALUE):
            case (LanguagesFR.Constants.FRENCH_VALUE):
                language = LanguageCodes.Constants.FRENCH_CODE_VALUE;
                break;

            case (LanguagesEN.Constants.SPANISH_VALUE):
            case (LanguagesTR.Constants.SPANISH_VALUE):
            case (LanguagesDE.Constants.SPANISH_VALUE):
            case (LanguagesES.Constants.SPANISH_VALUE):
            case (LanguagesFR.Constants.SPANISH_VALUE):
                language = LanguageCodes.Constants.SPANISH_CODE_VALUE;
                break;

        }

        //User's language preference is saved in order to be used in TranslateActivity:
        SharedPreferences myLanguagePrefs = getActivity().getSharedPreferences(languageKey, MODE_PRIVATE);
        SharedPreferences.Editor prefsEditorLanguage = myLanguagePrefs.edit();
        prefsEditorLanguage.putString(languageIdKey, language);
        prefsEditorLanguage.commit();


        //THEME_KEY
        String stringValueTheme = value.toString();
        preference.setSummary(stringValueTheme);

        //User's theme preference is saved in order to used in other Activities:
        SharedPreferences myThemePrefs = getActivity().getSharedPreferences(themeKey, MODE_PRIVATE);
        SharedPreferences.Editor prefsEditorTheme = myThemePrefs.edit();

        switch (stringValueTheme) {

            case (Themes.Constants.LIGHT):

                theme = Themes.Constants.LIGHT;
                prefsEditorTheme.putString(themeIdKey, theme);
                prefsEditorTheme.commit();

                restartSettingsActivityAfterThemeSelection();

                break;

            case (Themes.Constants.DARK):

                theme = Themes.Constants.DARK;
                prefsEditorTheme.putString(themeIdKey, theme);
                prefsEditorTheme.commit();

                restartSettingsActivityAfterThemeSelection();
                break;

        }

        return true;
    }

}

【问题讨论】：

标签： android localization sharedpreferences android-configchanges

【解决方案1】：

我已经解决了这个问题。错误的原因是使用本地化键作为首选项。由于每种语言的键都在变化，因此更新了 sharedPreferences。我为每个语言环境保留了相同的首选项键，问题就解决了。如果有人遇到同样的问题，我希望它可以成为一个解决方案。

【讨论】：