这是我目前正在使用的代码:
/**
* Volley adapter for JSON requests that will be parsed into Java objects by Gson.
*/
public class GsonRequest<T> extends Request<T> {
private final Gson gson = new GsonBuilder()
.registerTypeAdapter(ClusterUnits.class, new ClusterUnitsDeserializer()).create();
private final Class<T> clazz;
private final Map<String, String> headers;
private final Listener<T> listener;
private JSONObject parameters = null;
/**
* Make a GET request and return a parsed object from JSON.
*
* @param url URL of the request to make
* @param clazz Relevant class object, for Gson's reflection
* @param headers Map of request headers
*/
public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener) {
super(method, url, errorListener);
this.clazz = clazz;
this.headers = headers;
this.listener = listener;
}
public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener, JSONObject parameters) {
this(method, url, clazz, headers, listener, errorListener);
this.parameters = parameters;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return headers != null ? headers : super.getHeaders();
}
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> result = new HashMap<String, String>();
try {
result = new ObjectMapper().readValue(
parameters.toString(), TypeFactory.defaultInstance().constructMapLikeType(HashMap.class, String.class, String.class));
} catch (IOException e) {
DLog.d(e);
}
Log.i("PARAMETERS_LENGTH", String.valueOf(result.size()));
return result;
}
@Override
protected void deliverResponse(T response) {
listener.onResponse(response);
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
try {
String json = new String(
response.data, HttpHeaderParser.parseCharset(response.headers));
Log.i("RESPONSE", json);
return Response.success(
gson.fromJson(json, clazz), HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JsonSyntaxException e) {
return Response.error(new ParseError(e));
}
}
}
发布数据是否正确?我用来做HTTP请求并使用GSON自动解码JSON。我继续得到错误,因为发布的参数不正确:(
答案 0 :(得分:7)
您必须扩展JsonRequest。这是我的GsonRequest实现
public class GsonRequest<T> extends JsonRequest<T> {
private final Gson mGson;
private final Class<T> mClassType;
private final Map<String, String> mHeaders;
private final Response.Listener<T> mListener;
public GsonRequest(int method, String url, Class<T> classType, JSONObject jsonRequest,
Response.Listener<T> listener, Response.ErrorListener errorListener) {
this(method, url, classType, null, jsonRequest, listener, errorListener);
}
public GsonRequest(int method, String url, Class<T> classType, Map<String, String> headers,
JSONObject jsonRequest, Response.Listener<T> listener,
Response.ErrorListener errorListener) {
super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
errorListener);
mGson = new Gson();
mClassType = classType;
mHeaders = headers;
mListener = listener;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return mHeaders != null ? mHeaders : super.getHeaders();
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse networkResponse) {
try {
String json = new String(networkResponse.data, HttpHeaderParser.parseCharset
(networkResponse.headers));
return Response.success(mGson.fromJson(json, mClassType),
HttpHeaderParser.parseCacheHeaders(networkResponse));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JsonSyntaxException e) {
return Response.error(new ParseError(e));
}
}
@Override
protected void deliverResponse(T response) {
mListener.onResponse(response);
}
}
答案 1 :(得分:1)
我用以下代码解决了这个问题,即实现了getBody并更改了getBodyContentType:
/**
* Volley adapter for JSON requests that will be parsed into Java objects by Gson.
*/
public class GsonRequest<T> extends Request<T> {
private final Gson gson = new GsonBuilder()
.registerTypeAdapter(ClusterUnits.class, new ClusterUnitsDeserializer()).create();
private final Class<T> clazz;
private final Map<String, String> headers;
private final Listener<T> listener;
private JSONObject parameters = null;
/**
* Make a GET request and return a parsed object from JSON.
*
* @param url URL of the request to make
* @param clazz Relevant class object, for Gson's reflection
* @param headers Map of request headers
*/
public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener) {
super(method, url, errorListener);
this.clazz = clazz;
this.headers = headers;
this.listener = listener;
}
public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener, JSONObject parameters) {
this(method, url, clazz, headers, listener, errorListener);
this.parameters = parameters;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return headers != null ? headers : super.getHeaders();
}
@Override
public String getBodyContentType() {
return "application/json";
}
@Override
public byte[] getBody() throws AuthFailureError {
try {
return parameters.toString().getBytes(getParamsEncoding());
} catch (UnsupportedEncodingException e) {
DLog.d(e);
}
return null;
}
@Override
protected void deliverResponse(T response) {
listener.onResponse(response);
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
try {
String json = new String(
response.data, HttpHeaderParser.parseCharset(response.headers));
Log.i("RESPONSE", json);
return Response.success(
gson.fromJson(json, clazz), HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JsonSyntaxException e) {
return Response.error(new ParseError(e));
}
}
}