改装2：默认接受语言

Question

有什么方法可以根据操作系统设置自动添加Accept-Language标题？

例如：我有英语（美国）作为我的系统郎，这将是巨大的，有Accept-Language: en-us在一些简单的方式加入...

而且Android的N允许选择multiple locales in settings，所以这将是巨大的使用此类似：Accept-Language: da, en-gb;q=0.8, en;q=0.7

谢谢。

如果你想看到你的设备的选择的语言

使用此代码

Answer 1

：

Locale.getDefault().getDisplayLanguage(); 

希望这将帮助！干杯！

Answer 2

当您创建Retrofit对象时，您可以自定义由OkHttp网络库发送的标头。 考虑下面的例子：

Retrofit ret = new Retrofit.Builder() 
       .client(new OkHttpClient.Builder() 
       .addNetworkInterceptor(new Interceptor() { 

        @Override 
        public Response intercept(Chain chain) throws IOException { 
         Request.Builder builder = chain.request().newBuilder(); 

         builder.addHeader("Accept-Language", "Your value"); 
         Request request = builder.build(); 
         Response response = chain.proceed(request); 

         return response; 
        } 
       }).build()) 
       .build(); 

在“您的值”的字符串，你可以调整你的头的值，并把例如：builder.addHeader("Accept-Language", Locale.getDefault().getDisplayLanguage())

Answer 3

的人谁的疑惑，我结束了这个Interceptor：

package common.network; 

import java.io.IOException; 
import java.util.Locale; 

import okhttp3.Interceptor; 
import okhttp3.Request; 
import okhttp3.Response; 

/** 
* Created by oleynikd on 6/9/16. 
*/ 
public class AcceptLanguageHeaderInterceptor implements Interceptor { 
    @Override 
    public Response intercept(Chain chain) throws IOException { 
     Request originalRequest = chain.request(); 
     Request requestWithHeaders = originalRequest.newBuilder() 
       .header("Accept-Language", localeToBcp47Language(Locale.getDefault())) 
       .build(); 
     return chain.proceed(requestWithHeaders); 
    } 

    /* 
    * From https://github.com/apache/cordova-plugin-globalization/blob/master/src/android/Globalization.java#L140 
    * @Description: Returns a well-formed ITEF BCP 47 language tag representing 
    * the locale identifier for the client's current locale 
    * 
    * @Return: String: The BCP 47 language tag for the current locale 
    */ 
    private static String localeToBcp47Language(Locale loc) { 
     final char SEP = '-';  // we will use a dash as per BCP 47 
     String language = loc.getLanguage(); 
     String region = loc.getCountry(); 
     String variant = loc.getVariant(); 

     // special case for Norwegian Nynorsk since "NY" cannot be a variant as per BCP 47 
     // this goes before the string matching since "NY" wont pass the variant checks 
     if(language.equals("no") && region.equals("NO") && variant.equals("NY")){ 
      language = "nn"; 
      region = "NO"; 
      variant = ""; 
     } 

     if(language.isEmpty() || !language.matches("\\p{Alpha}{2,8}")){ 
      language = "und";  // Follow the Locale#toLanguageTag() implementation 
      // which says to return "und" for Undetermined 
     }else if(language.equals("iw")){ 
      language = "he";  // correct deprecated "Hebrew" 
     }else if(language.equals("in")){ 
      language = "id";  // correct deprecated "Indonesian" 
     }else if(language.equals("ji")){ 
      language = "yi";  // correct deprecated "Yiddish" 
     } 

     // ensure valid country code, if not well formed, it's omitted 
     if (!region.matches("\\p{Alpha}{2}|\\p{Digit}{3}")) { 
      region = ""; 
     } 

     // variant subtags that begin with a letter must be at least 5 characters long 
     if (!variant.matches("\\p{Alnum}{5,8}|\\p{Digit}\\p{Alnum}{3}")) { 
      variant = ""; 
     } 

     StringBuilder bcp47Tag = new StringBuilder(language); 
     if (!region.isEmpty()) { 
      bcp47Tag.append(SEP).append(region); 
     } 
     if (!variant.isEmpty()) { 
      bcp47Tag.append(SEP).append(variant); 
     } 

     return bcp47Tag.toString(); 
    } 
} 

然后你可以使用它像：

private static final OkHttpClient client = new OkHttpClient.Builder() 
      .addInterceptor(new AcceptLanguageHeaderInterceptor()) 
      .build();