Android 检索其Url查询

我在书中使用安卓应用程序对网络进行改造

这是查询URL

https://www.googleapis.com/books/v1/volumes?q=subject:android

我想问我如何在改装中使用它，因为它的末尾包含冒号，我不知道怎么做。我是新手。最后我如何获得（主题：android）？我在网上搜索，但没有找到任何解决方案

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我搜索了改装文档，但没有找到任何相关信息。

尝试使用

@Path

注释

@GET(books/v1/volumes?q=subject:{subject})
Call<ResponseBody> getBooks(@Path String subject);

@GET（books/v1/volumes？q=subject:{subject}）
调用getBooks（@Path String subject）；

您可以尝试

@Query

接口：

public interface NetworkService {
    @GET("books/v1/volumes")
    Call<ResponseBody> getSubject(@Query(value = "q") String subjectName);
}

public static final String url = "https://www.googleapis.com/";

// onCreate()
Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(url)
            .addConverterFactory(GsonConverterFactory.create());

Retrofit retrofit = builder.build();
NetworkService client = retrofit.create(NetworkService.class);

Call<ResponseBody> call = client.getSubject("subject:android");
call.enqueue(new Callback<ResponseBody>()...);

public interface NetworkService {
    @GET("books/v1/volumes")
    Call<ResponseBody> getSubject(@QueryMap() Map<String, String> queryMap);
}

public static final String url = "https://www.googleapis.com/";

// onCreate()
Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(url)
            .addConverterFactory(GsonConverterFactory.create());

Retrofit retrofit = builder.build();
NetworkService client = retrofit.create(NetworkService.class);

Map<String, String> subjectMap = new HashMap<>();
subjectMap.put("q", "subject:android");

Call<ResponseBody> call = client.getSubject(subjectMap);
call.enqueue(new Callback<ResponseBody>()...);

用法：

public interface NetworkService {
    @GET("books/v1/volumes")
    Call<ResponseBody> getSubject(@Query(value = "q") String subjectName);
}

public static final String url = "https://www.googleapis.com/";

// onCreate()
Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(url)
            .addConverterFactory(GsonConverterFactory.create());

Retrofit retrofit = builder.build();
NetworkService client = retrofit.create(NetworkService.class);

Call<ResponseBody> call = client.getSubject("subject:android");
call.enqueue(new Callback<ResponseBody>()...);

public interface NetworkService {
    @GET("books/v1/volumes")
    Call<ResponseBody> getSubject(@QueryMap() Map<String, String> queryMap);
}

public static final String url = "https://www.googleapis.com/";

// onCreate()
Retrofit.Builder builder = new Retrofit.Builder()
            .baseUrl(url)
            .addConverterFactory(GsonConverterFactory.create());

Retrofit retrofit = builder.build();
NetworkService client = retrofit.create(NetworkService.class);

Map<String, String> subjectMap = new HashMap<>();
subjectMap.put("q", "subject:android");

Call<ResponseBody> call = client.getSubject(subjectMap);
call.enqueue(new Callback<ResponseBody>()...);

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不工作显示错误。原因：java.lang.IllegalArgumentException:URL查询字符串“q=subject:{subject}”不能有替换块。对于动态查询参数，请使用@query。