我在安卓应用中使用了Retrofit发送请求和接收响应,但是当我想要转换从服务器返回的响应时,总是出现异常
问题:
retrofit.RetrofitError: com.google.gson.JsonSyntaxException:
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING
当服务器返回电影列表时,我需要将所有这些电影放入列表中。
电影
(模型类):
public class Movie {
public Movie() {}
@SerializedName("original_title")
private String movieTitle;
@SerializedName("vote_average")
private String movieVoteAverage;
@SerializedName("overview")
private String movieOverview;
............
}
GitMovieApi
类:
public interface GitMovieApi {
@GET("/3/movie/{movie}")
public void getMovie(@Path("movie") String typeMovie,@Query("api_key") String keyApi, Callback<Movie> response);
}
RestAdapter
配置:
RestAdapter restAdapter = new RestAdapter.Builder()
.setLogLevel(RestAdapter.LogLevel.FULL)
.setConverter(new GsonConverter(new GsonBuilder().registerTypeAdapter(Movie.class, new UserDeserializer()).create()))
.setEndpoint("http://api.themoviedb.org")
.build();
GitMovieApi git = restAdapter.create(GitMovieApi.class);
git.getMovie("popular", "Keyapi", new Callback<Movie>() {
@Override
public void success(Movie movie, Response response) {
Toast.makeText(getActivity(), "s", Toast.LENGTH_LONG).show();
}
@Override
public void failure(RetrofitError error) {
Toast.makeText(getActivity(), error.getMessage(), Toast.LENGTH_LONG).show();
}
});
UserDeserializer:
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);
}
}
JSON(响应):
{
"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
}
results
的内容不是电影。它是电影列表。 - njzk2new JsonParser().parse("results")
这不是正确的用法。这会尝试解析一个字符串"results"
。你需要使用给定的 JsonElement。 - njzk2