Java 如何在改装库中使用Gson?
我在android中使用了发送请求和接收响应的改装,但当我想要转换来自服务器的响应时出现问题,它总是给我Java 如何在改装库中使用Gson?,java,android,json,gson,retrofit,Java,Android,Json,Gson,Retrofit,我在android中使用了发送请求和接收响应的改装,但当我想要转换来自服务器的响应时出现问题,它总是给我异常: retrofit.RetrofitError: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING 当来自服务器的响应应该给我电影列表,所以我需要把所有这些电影在列表中 电影(模型级): Gi
异常
:
retrofit.RetrofitError: com.google.gson.JsonSyntaxException:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING
当来自服务器的响应应该给我电影列表,所以我需要把所有这些电影在列表中
电影
(模型级):
GitMovieApi
Class:
public interface GitMovieApi {
@GET("/3/movie/{movie}")
public void getMovie(@Path("movie") String typeMovie,@Query("api_key") String keyApi, Callback<Movie> response);
}
用户反序列化程序:
public class UserDeserializer implements JsonDeserializer<Movie> {
@Override
public Movie deserialize(JsonElement jsonElement, Type typeOF,
JsonDeserializationContext context)
throws JsonParseException {
JsonElement userJson = new JsonParser().parse("results");
return new Gson().fromJson(userJson, Movie.class);
}
}
{
"page": 1,
"results": [
{
"adult": false,
"backdrop_path": "/tbhdm8UJAb4ViCTsulYFL3lxMCd.jpg",
"genre_ids": [
53,
28,
12
],
"id": 76341,
"original_language": "en",
"original_title": "Mad Max: Fury Road",
"overview": "An apocalyptic story set in the furthest.",
"release_date": "2015-05-15",
"poster_path": "/kqjL17yufvn9OVLyXYpvtyrFfak.jpg",
"popularity": 48.399601,
"title": "Mad Max: Fury Road",
"video": false,
"vote_average": 7.6,
"vote_count": 2114
},
{
"adult": false,
"backdrop_path": "/sLbXneTErDvS3HIjqRWQJPiZ4Ci.jpg",
"genre_ids": [
10751,
16,
12,
35
],
"id": 211672,
"original_language": "en",
"original_title": "Minions",
"overview": "Minions Stuart.",
"release_date": "2015-06-25",
"poster_path": "/s5uMY8ooGRZOL0oe4sIvnlTsYQO.jpg",
"popularity": 31.272707,
"title": "Minions",
"video": false,
"vote_average": 6.8,
"vote_count": 1206
},
],
"total_pages": 11871,
"total_results": 237415
}
你甚至不需要在这里定制反序列化程序。
完全摆脱UserDeserializer
,不需要它。您的查询将返回电影列表,因此请回调实际读取电影列表的对象:
public class MovieList {
@SerializedName("results")
List<Movie> movieList;
// you can also add page, total_pages, and total_results here if you want
}
您的重新适应程序
:
RestAdapter restAdapter = new RestAdapter.Builder()
.setLogLevel(RestAdapter.LogLevel.FULL)
.setConverter(new GsonConverter(new GsonBuilder()).create()))
.setEndpoint("http://api.themoviedb.org")
.build();
GitMovieApi git = restAdapter.create(GitMovieApi.class);
问题不在于您编写的
反序列化程序
不正确(虽然您编写了,但这没关系,因为您不需要它,JsonParser
不是如何编写的),但是默认的反序列化行为对您来说应该可以正常工作。使用上述代码,它就可以正常工作。在改装2中,它更简单。您的GitMovieApi
课程:
interface MoviesApi {
@GET("/3/movie/{movie}")
Call<MovieList> getMovies(@Path("movie") String typeMovie,
@Query("api_key") String keyApi);
}
interface MoviesApi{
@获取(“/3/movie/{movie}”)
调用getMovies(@Path(“movie”)字符串类型movie,
@查询(“api_键”)字符串keyApi);
}
然后,您只需创建一个改装对象并进行回调:
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(MOVIES_BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
service = retrofit.create(MoviesApi.class);
Call<MovieList> mlc = service.getMovies(getArguments().getString(ARG_MOVIE_TYPE), getString(R.string.THE_MOVIE_DB_API_TOKEN));
mlc.enqueue(new Callback<MovieList>() {
@Override
public void onResponse(Call<MovieList> call, Response<MovieList> response) {
movies = response.body().movieList;
}
@Override
public void onFailure(Call<MovieList> call, Throwable t) {}
});
reformation-reformation=new-reformation.Builder()
.baseUrl(电影\u基本\u URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
服务=改装.create(MoviesApi.class);
调用mlc=service.getMovies(getArguments().getString(ARG_MOVIE_类型),getString(R.string.THE_MOVIE_DB_API_令牌));
排队(新回调(){
@凌驾
公共void onResponse(调用、响应){
movies=response.body().movieList;
}
@凌驾
public void onFailure(Call,Throwable t){}
});
results的内容不是电影。这是一个电影列表newjsonparser()。解析(“结果”)
它不是这样工作的。这正试图解析字符串形式的“结果”
。您想使用提供给您的JsonElement。我知道结果是电影列表,但当您看到Gson时,您可以看到它是一个对象,我尝试获取该对象{…},然后访问电影列表。
RestAdapter restAdapter = new RestAdapter.Builder()
.setLogLevel(RestAdapter.LogLevel.FULL)
.setConverter(new GsonConverter(new GsonBuilder()).create()))
.setEndpoint("http://api.themoviedb.org")
.build();
GitMovieApi git = restAdapter.create(GitMovieApi.class);
interface MoviesApi {
@GET("/3/movie/{movie}")
Call<MovieList> getMovies(@Path("movie") String typeMovie,
@Query("api_key") String keyApi);
}
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(MOVIES_BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
service = retrofit.create(MoviesApi.class);
Call<MovieList> mlc = service.getMovies(getArguments().getString(ARG_MOVIE_TYPE), getString(R.string.THE_MOVIE_DB_API_TOKEN));
mlc.enqueue(new Callback<MovieList>() {
@Override
public void onResponse(Call<MovieList> call, Response<MovieList> response) {
movies = response.body().movieList;
}
@Override
public void onFailure(Call<MovieList> call, Throwable t) {}
});