爲什麼我無法將頭添加到攔截器requeset OkHttp上Retrofit？

Question

請問我可以在代碼中指出我的錯誤，我不能向攔截器添加頭「授權」。當我提出請求時，會拋出錯誤retrofit2.adapter.rxjava.HttpException：HTTP 401未授權。但是，當我添加標頭令牌爲每個請求

@Header("Authorization") String token 

然後它的工作。

這裏是我的代碼：

protected Retrofit retrofit; 
protected OkHttpClient client; 
protected T api; 
protected UserCredential userCredential; 

public RestClient(Class<T> type) { 
    if (client == null) { 
     synchronized (OkHttpClient.class) { 
      client = new OkHttpClient(); 
      client.newBuilder().addInterceptor(chain -> { 
       Request original = chain.request(); 
       Request.Builder builder = original.newBuilder(); 
       if (GrabDoiApplication.getInstance().getCurrentCredentials() != null) { 
        String token = GrabDoiApplication.getInstance().getCurrentCredentials().getToken(); 
        if (token != null) { 
         builder.addHeader("Authorization", token); 
        } 
       } 
       builder.method(original.method(), original.body()); 

       return chain.proceed(builder.build()); 
      }).build(); 

      if (retrofit == null) { 
       synchronized (Retrofit.class) { 
        Retrofit.Builder retrofitBuilder = new Retrofit.Builder() 
          .baseUrl(Constants.GRABDOI_SERVER_URL) 
          .client(client) 
          .addConverterFactory(GsonConverterFactory.create()) 
          .addCallAdapterFactory(RxJavaCallAdapterFactory.create()); 
        retrofit = retrofitBuilder.build(); 
       } 
      } 
     } 
    } 
    api = retrofit.create(type); 
} 

Answer 1

你可以嘗試把訪問靜態方法進行攔截的身體：

public RestClient(Class<T> type) { 
    if (retrofit != null) { 
     return; 
    } 
    synchronized (OkHttpClient.class) { 
     client = new OkHttpClient(); 
     OkHttpClient.Builder builder = client.newBuilder(); 
     final String token; 
     if (GrabDoiApplication.getInstance().getCurrentCredentials() != null && 
       (token = GrabDoiApplication.getInstance().getCurrentCredentials().getToken()) != null) { 
      builder.addInterceptor(chain -> { 
       Request.Builder builder = chain.request().newBuilder(); 
       builder.addHeader("Authorization", token); 
       builder.method(original.method(), original.body()); 
       return chain.proceed(builder.build()); 
      }); 
     } 
     client = builder.build(); 

     synchronized (Retrofit.class) { 
      Retrofit.Builder retrofitBuilder = new Retrofit.Builder() 
        .baseUrl(Constants.GRABDOI_SERVER_URL) 
        .client(client) 
        .addConverterFactory(GsonConverterFactory.create()) 
        .addCallAdapterFactory(RxJavaCallAdapterFactory.create()); 
      retrofit = retrofitBuilder.build(); 
     } 
    } 


    api = retrofit.create(type); 
}