android - 带有改造 API 的 MalformedJsonException？

Question

我需要向我的网络服务发送一个 json，json 是:

{
    "Sala": {
        "usuario": "%@",
        "adversario": "%@",
        "atualizacao": "%@",
        "device": "%@",
        "device_tipo": "ios"
    }
}

。我正在尝试使用 Retrofit API 1.8 来做到这一点。当我尝试发送帖子时会引发异常。

异常(exception):

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 7 path $

我正在尝试这个

public class ChatObject {
    private String usuario;
    private String adversario;
    private String atualizacao;
    private String email;
    private String device;
    private String device_tipo;

改造界面

@POST("/WsChat/interacao.json")
    public void onReceiveMessage(@Body ChatObject obj,
                                 Callback<JsonElement> response);

实现

public void receiveMessage(){
    ///{\"Sala\":{\"usuario\":\"%@\",\"adversario\":\"%@\",\"atualizacao\":\"%@\",\"device\":\"%@\",\"device_tipo\":\"ios\"}}
    ChatObject chatObject = new ChatObject(BatalhaConfigs.USUARIO_EMAIL,
                                           BatalhaConfigs.ADVERSARIO_EMAIL,
                                           new Date().toString(),
                                           BatalhaConfigs.USUARIO_EMAIL,
                                           AndroidReturnId.getAndroidId(),
                                           "android");

    RestAdapter adapter = new RestAdapter.Builder()
            .setLogLevel(RestAdapter.LogLevel.FULL)
            .setRequestInterceptor(new CustomRequestInterceptor())
            .setEndpoint(END_POINT)
            .build();
    ChatListener listener = adapter.create(ChatListener.class);
    listener.onReceiveMessage(chatObject, new Callback<JsonElement>() {
        @Override
        public void success(JsonElement jsonElement, retrofit.client.Response response) {
            Log.i("JSON ELEMENT->", jsonElement.toString());
        }

        @Override
        public void failure(RetrofitError error) {
            Log.i("FALHOU->", error.getLocalizedMessage());

        }
    });
}

Answer 1

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) 通常在某些字符格式不正确时抛出 JSON .异常消息本身建议使反序列化更加宽容。

但我建议你修复你的 JSON 并删除不需要的字符。

您应该扩展 GsonConverter 并覆盖 fromBody() 以使 Gson 从容错的 JsonReader 中读取。然后只需将其设置为您的 RestAdapter。如果没有抛出异常，这将尝试使用宽容的 JsonReader 反序列化然后关闭它。

public class LenientGsonConverter extends GsonConverter {
private Gson mGson;

public LenientGsonConverter(Gson gson) {
    super(gson);
    mGson = gson;
}

public LenientGsonConverter(Gson gson, String charset) {
    super(gson, charset);
    mGson = gson;
}

@Override
public Object fromBody(TypedInput body, Type type) throws ConversionException {
    boolean willCloseStream = false; // try to close the stream, if there is no exception thrown using tolerant  JsonReader
    try {
        JsonReader jsonReader = new JsonReader(new InputStreamReader(body.in()));
        jsonReader.setLenient(true);
        Object o = mGson.fromJson(jsonReader,type);
        willCloseStream = true;
        return o;
    } catch (IOException e) {
        e.printStackTrace();
    }finally {
        if(willCloseStream) {
            closeStream(body);
        }
    }

    return super.fromBody(body, type);
}

private void closeStream(TypedInput body){
        try {
            InputStream in = body.in();
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

}