自定义转换器用于改造
我正在尝试使用自定义转换器进行Retrofit
RestAdapter.Builder builder = new RestAdapter.Builder()
.setEndpoint(BuildConfig.BASE_SERVER_ENDPOINT)
.setClient(new OkClient(client)).setConverter(new CitationResponseConverter())
.setLogLevel(RestAdapter.LogLevel.FULL);
下面是我的自定义转换器
public class CitationResponseConverter implements Converter {
@Override
public Object fromBody(TypedInput typedInput, Type type) throws ConversionException {
try {
InputStream in = typedInput.in(); // convert the typedInput to String
String string = fromStream(in);
in.close(); // we are responsible to close the InputStream after use
if (String.class.equals(type)) {
return string;
} else {
return new Gson().fromJson(string,
type); // convert to the supplied type, typically Object, JsonObject or Map<String, Object>
}
} catch (Exception e) { // a lot may happen here, whatever happens
throw new ConversionException(
e); // wrap it into ConversionException so retrofit can process it
}
}
@Override
public TypedOutput toBody(Object object) {
return null;
}
private static String fromStream(InputStream in) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder out = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
out.append(line);
out.append("rn");
}
return out.toString();
}
}
我收到以下错误
retrofit.RetrofitError: method POST must have a request body.
同时试图做出这个API调用
@POST("/service/citations")
Observable<CitationMain> getCitations(@Body CitationRequestBody body);
我想转换器正在重写对api调用的请求，我如何避免这种情况并传递在翻新服务中定义的请求体。
回应：
{
"citations": [
{
"coverdatestart": "2015-05-01",
"coverimage": [
"09699961/S0969996115X00040/cov200h.gif",
"09699961/S0969996115X00040/cov150h.gif"
],
"pubyear": "2015",
"refimage": [
"09699961/S0969996115X00040/S0969996115000522/gr1-t.gif",
"09699961/S0969996115X00040/S0969996115000522/gr1.jpg"
],
"volissue": "Volume 77",
"volume": "77"
},
{
"pubdatetxt": "19700101",
"refimage": "mma:otto_4_9781455748600/9781455748600_0020",
}
]
}
我会做这样的事情：
public class StringList extends ArrayList<String> {
// Empty on purpose. The class is here only to be recognized by Gson
}
public class CitationMain {
@SerializedName("field_name_here")
StringList values;
// Your other fields
}
然后在创建RestAdapter时：
public class StringListDeserializer implements JsonDeserializer<StringList> {
@Override
public StringList deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext
context) throws JsonParseException {
StringList value = new StringList();
if (json.isJsonArray()) {
for (JsonElement element : json.getAsJsonArray()) {
value.add(element.getAsString());
}
} else {
value.add(json.getAsString());
}
return value;
}
}
接着：
Gson gson = new GsonBuilder()
.registerTypeAdapter(StringList.class, new StringListDeserializer())
.create();
RestAdapter.Builder builder = new RestAdapter.Builder()
//...
.setConverter(new GsonConverter(gson));
这并不理想，因为该对象是自定义的，但现在我能想到的任何其他解决方案都非常复杂。
这里的反序列化器专门为声明为StringList的字段进行了注册，它将处理单个字符串的情况以及字符串数组的情况。 任何其他字段类型将使用默认的反序列化过程。