Question

我在网上和论坛上搜索了这些 - 发现了这些：

以及Xamarin Forms的更多内容。

但这些都不是很有希望并且可以动态更改文本（在内部更改文本）。

有人可以帮忙吗？

Answer 1

对于Android，你可以这样做：

像这样创建自己的contextWrapper：

 public class MyContextWrapper : ContextWrapper
{
   public MyContextWrapper(Context context) : base(context)          
   {

   }
public static Locale getSystemLocaleLegacy(Configuration config)
{
    return config.Locale;
}
public static Locale getSystemLocale(Configuration config)
{
    return config.Locales.Get(0);
}
public static void setSystemLocaleLegacy(Configuration config, Locale locale)
{
    config.SetLocale(locale);
    config.SetLayoutDirection(locale);
}
public static void setSystemLocale(Configuration config, Locale locale)
{
    config.SetLocale(locale);
    config.SetLayoutDirection(locale);
}

public static ContextWrapper wrap(Context context, string language)
{
    Configuration config = context.Resources.Configuration;
    Locale sysLocale = null;
    if (Build.VERSION.SdkInt >= BuildVersionCodes.N)
    {
        sysLocale = getSystemLocale(config);
    }
    else
    {
        sysLocale = getSystemLocaleLegacy(config);
    }

    Locale locale;

    if (language == "en")
    {
        locale = new Locale(language, "US");
    }
    else if (language == "zh")
    {
        locale = new Locale(language, "CN");
    }
    else
    {
        locale = new Locale("en", "US");
    }

    Locale.Default = (locale);

    if (Build.VERSION.SdkInt >= BuildVersionCodes.N)
    {
        setSystemLocale(config, locale);
    }
    else
    {
        setSystemLocaleLegacy(config, locale);
    }

    if (Build.VERSION.SdkInt >= BuildVersionCodes.JellyBeanMr1)
    {
        context = context.CreateConfigurationContext(config);
    }
    else
    {
        context.Resources.UpdateConfiguration(config, context.Resources.DisplayMetrics);
    }

    return new MyContextWrapper(context);
}

}

将以下代码添加到您的活动中：

 protected override void AttachBaseContext(Context @base)
{
    try
    {              
    base.AttachBaseContext(MyContextWrapper.wrap(@base,"Your_language"));
    }

}

在您的资源中添加您的语言字符串文件及其相应的语言名称，例如对于中文您添加以下值文件夹： values-zh-rCN

有关详细信息，请查看here

<强>更新

ios代码：

  public class Localize
{
   public void SetLocale(CultureInfo ci)
{
    Thread.CurrentThread.CurrentCulture = ci;
    Thread.CurrentThread.CurrentUICulture = ci;

    CultureChanged?.Invoke(this, ci);
}

public event EventHandler<CultureInfo> CultureChanged = delegate { };

public CultureInfo GetCurrentCultureInfo()
{
    var netLanguage = "en";
    if (NSLocale.PreferredLanguages.Length > 0)
    {
        var pref = NSLocale.PreferredLanguages[0];
        netLanguage = iOSToDotnetLanguage(pref);
    }
    // this gets called a lot - try/catch can be expensive so consider caching or something
    System.Globalization.CultureInfo ci = null;
    try
    {
        ci = new System.Globalization.CultureInfo(netLanguage);
    }
    catch
    {
        // iOS locale not valid .NET culture (eg. "en-ES" : English in Spain)
        // fallback to first characters, in this case "en"
        try
        {
            var fallback = ToDotnetFallbackLanguage(new PlatformCulture(netLanguage));
            ci = new System.Globalization.CultureInfo(fallback);
        }
        catch
        {
            // iOS language not valid .NET culture, falling back to English
            ci = new System.Globalization.CultureInfo("en");
        }
    }
    return ci;
}

string iOSToDotnetLanguage(string iOSLanguage)
{
    var netLanguage = iOSLanguage;
    //certain languages need to be converted to CultureInfo equivalent
    switch (iOSLanguage)
    {
        case "ms-MY": // "Malaysian (Malaysia)" not supported .NET culture
        case "ms-SG": // "Malaysian (Singapore)" not supported .NET culture
            netLanguage = "ms"; // closest supported
            break;
        case "gsw-CH": // "Schwiizertüütsch (Swiss German)" not supported .NET culture
            netLanguage = "de-CH"; // closest supported
            break;
            // add more application-specific cases here (if required)
            // ONLY use cultures that have been tested and known to work
    }
    return netLanguage;
}

string ToDotnetFallbackLanguage(PlatformCulture platCulture)
{
    var netLanguage = platCulture.LanguageCode; // use the first part of the identifier (two chars, usually);
    switch (platCulture.LanguageCode)
    {
        case "pt":
            netLanguage = "pt-PT"; // fallback to Portuguese (Portugal)
            break;
        case "gsw":
            netLanguage = "de-CH"; // equivalent to German (Switzerland) for this app
            break;
            // add more application-specific cases here (if required)
            // ONLY use cultures that have been tested and known to work
    }
    return netLanguage;
}
 }

有关步骤的参考，请转到here

Answer 2

如果您使用MvvmCross和resx PCL，此代码可以正常使用

public class ResxTextProvider : IMvxTextProvider
    {
        private readonly ResourceManager _resourceManager;
        private readonly MvxSubscriptionToken _token;
        IMvxMessenger messenger;

        public ResxTextProvider(ResourceManager resourceManager , string CultureInfoString)
        {
            _resourceManager = resourceManager;
            CurrentLanguage = new CultureInfo(CultureInfoString);

            messenger = Mvx.Resolve<IMvxMessenger>();
            if (messenger != null)
            {
                _token = messenger.Subscribe<languageChangedMessage>(OnlanguageChange);
            }
        }

        private void OnlanguageChange(languageChangedMessage obj)
        {
            CurrentLanguage = new CultureInfo(obj.LangId);
        }

MVVMCross即时更改语言 - IOS / Android

2 个答案: