使用参数进行改造和GET

我正尝试使用Retrofit向Google GeoCode API发送请求。 服务接口如下所示:

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

当我致电服务时:

 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 

我看了一下StackOverflow问题: 改进:@GET命令中的多个查询参数? 但似乎并不适用。

我从这里几乎逐字地拿了代码: http : //square.github.io/retrofit/所以我有点理解这个问题。

思考?

AFAIK, {...}只能用作path,不在查询参数内。 试试这个:

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

如果你有一个未知数量的参数可以通过,你可以使用这样的事情:

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

@QueryMap为我工作,而不是FieldMap

如果你有一堆的GET参数,另一种方式将它们传递到你的url是一个HashMap

 class YourActivity extends Activity { private static final String BASEPATH = "http://www.example.com"; private interface API { @GET("/thing") void getMyThing(@QueryMap Map<String, String> params, new Callback<String> callback); } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.your_layout); RestAdapter rest = new RestAdapter.Builder().setEndpoint(BASEPATH).build(); API service = rest.create(API.class); Map<String, String> params = new HashMap<String, String>(); params.put("key1", "val1"); params.put("key2", "val2"); // ... as much as you need. service.getMyThing(params, new Callback<String>() { // ... do some stuff here. }); } } 

所调用的URL将为http://www.example.com/thing/?key1=val1&key2=val2