android - 使用参数进行改造和 GET

Question

我正在尝试使用 Retrofit 向 Google GeoCode API 发送请求。服务接口(interface)如下所示:

public interface FooService {    
    @GET("/maps/api/geocode/json?address={zipcode}&sensor=false")
    void getPositionByZip(@Path("zipcode") int zipcode, Callback<String> cb);
}

当我调用服务时:

OkHttpClient okHttpClient = new OkHttpClient();

RestAdapter restAdapter = new RestAdapter.Builder().setEndpoint(Constants.GOOGLE_GEOCODE_URL).setClient(new OkClient(okHttpClient)).build();

FooService service = restAdapter.create(FooService.class);

service.getPositionByZip(zipCode, new Callback<String>() {
    @Override public void success(String jsonResponse, Response response) {
       ...
    }
@Override public void failure(RetrofitError retrofitError) {
    }
});

我收到以下堆栈跟踪:

06-07 13:18:55.337: E/AndroidRuntime(3756): FATAL EXCEPTION: Retrofit-Idle
06-07 13:18:55.337: E/AndroidRuntime(3756): Process: com.marketplacehomes, PID: 3756
06-07 13:18:55.337: E/AndroidRuntime(3756): java.lang.IllegalArgumentException: FooService.getPositionByZip: URL query string "address={zipcode}&sensor=false" must not have replace block.
06-07 13:18:55.337: E/AndroidRuntime(3756):     at retrofit.RestMethodInfo.methodError(RestMethodInfo.java:120)
06-07 13:18:55.337: E/AndroidRuntime(3756):     at retrofit.RestMethodInfo.parsePath(RestMethodInfo.java:216)
06-07 13:18:55.337: E/AndroidRuntime(3756):     at retrofit.RestMethodInfo.parseMethodAnnotations(RestMethodInfo.java:162)
06-07 13:18:55.337: E/AndroidRuntime(3756):     at 

我查看了 StackOverflow 问题:Retrofit: multiple query parameters in @GET command?但它似乎不适用。

我几乎一字不差地从这里获取了代码:http://square.github.io/retrofit/所以我对理解这个问题有点茫然。

想法？

Answer 1

AFAIK, {...} 只能用作路径，不能在查询参数中使用。试试这个:

public interface FooService {    

    @GET("/maps/api/geocode/json?sensor=false")
    void getPositionByZip(@Query("address") String address, Callback<String> cb);
}

如果你有未知数量的参数要传递，你可以这样做:

public interface FooService {    

    @GET("/maps/api/geocode/json")
    @FormUrlEncoded
    void getPositionByZip(@FieldMap Map<String, String> params, Callback<String> cb);
}