volley multpart post 。response失败，提示没有接受到params参数。但getbody等断点调试，params都有数据的。不知道问题出在哪了？

[ayyb1988]

post 参数有两种类型，一直是普通的string。一种是zip文件。
自定义了MultipartGsonRequest ，如下。
public class MultipartGsonRequest extends Request {
private static final String TAG = "MultipartGsonRequest";
MultipartEntityBuilder entity = MultipartEntityBuilder.create();

private final Class mClass;
private Response.Listener mListener;
private final Gson gson;
private final File mFilePart;
private final Map<String, String> mStringPart;
private static final String FILE_PART_NAME = "img";
private HttpEntity httpentity;

public MultipartGsonRequest(String url, Class clazz,File file,
                            Map<String, String> mStringPart,
                            Response.Listener listener,
                            Response.ErrorListener errorListener) {
    super(Request.Method.POST, url, errorListener);
    mClass = clazz;
    mListener = listener;
    gson = new Gson();
    mFilePart = file;
    this.mStringPart = mStringPart;
    entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

// try {
// entity.setCharset(CharsetUtils.get("UTF-8"));
// } catch (UnsupportedEncodingException e) {
// e.printStackTrace();
// }
buildMultipartEntity();
}

public void addStringBody(String param, String value) {
    mStringPart.put(param, value);
}

private void buildMultipartEntity() {
    entity.addPart(FILE_PART_NAME, new FileBody(mFilePart, ContentType.create("application/zip"), mFilePart.getName()));
    for (Map.Entry<String, String> entry : mStringPart.entrySet()) {
        entity.addTextBody(entry.getKey(), entry.getValue(),ContentType.TEXT_PLAIN.withCharset("UTF-8"));
    }
}

@Override
public String getBodyContentType() {
    return httpentity.getContentType().getValue();
}

@Override
public byte[] getBody() throws AuthFailureError {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try {
        httpentity = entity.build();
        httpentity.writeTo(bos);
    } catch (IOException e) {
        VolleyLog.e("IOException writing to ByteArrayOutputStream");
    }
    return bos.toByteArray();
}

@Override
protected Response parseNetworkResponse(NetworkResponse response) {
    String json;
    try {
        json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
    } catch (UnsupportedEncodingException e) {
        Log.e(TAG, String.format("Encoding problem parsing API response. NetworkResponse:%s", response.toString()), e);
        return Response.error(new ParseError(e));
    }
    try {
        return Response.success(gson.fromJson(json, mClass), HttpHeaderParser.parseCacheHeaders(response));
    } catch (JsonSyntaxException e) {
        Log.e(TAG, String.format("Couldn't API parse JSON response. NetworkResponse:%s", response.toString()), e);
        Log.e(TAG, String.format("Couldn't API parse JSON response. Json dump: %s", json));
        return Response.error(new ParseError(e));
    }
}

@Override
protected void deliverResponse(T response) {
    mListener.onResponse(response);
}

}

调用multpart请求。
for (int i = 0; i < Bimp.tempSelectBitmap.size(); i++) {
File f = new File(Bimp.tempSelectBitmap.get(i).imagePath);
resFileList.add(f);
}
String url = ApiUrl.JoinActivityCreate;
Map<String, File> files = new HashMap<String, File>();
if (resFileList != null && resFileList.size() > 0 && zipFile != null) {
try {
ZipUtils.zipFiles(resFileList, zipFile);
} catch (IOException e) {
e.printStackTrace();
}
}

    Map<String, String> params = new HashMap<String, String>();

    params.put("Cer", GlobalData.curUser.getCryptoCer());
    params.put("Title", etActivityTitle.getText().toString());
    params.put("EndTime", btActivityEndTime.getText().toString());
    params.put("Address", etActivityAddress.getText().toString());
    params.put("Latitude", String.valueOf(latitude));
    params.put("Longitude", String.valueOf(longitude));
    params.put("Content", etActivityIntroduction.getText().toString());
    params.put("MaxJoinCount", String.valueOf(etMaxJoinCount.getText().toString()));
    StringBuffer catestr = new StringBuffer();
    for (int i = 0; i < cates.size(); i++) {
        if (i == cates.size() - 1) {
            catestr.append(cates.get(i));
        } else {
            catestr.append(cates.get(i)).append(",");
        }
    }
    params.put("Cates", String.valueOf(catestr));
    StringBuffer infoitemstr = new StringBuffer();
    for (int i = 0; i < joinInputItems.size(); i++) {
        if (i == joinInputItems.size() - 1) {
            infoitemstr.append(joinInputItems.get(i).getName());
        } else {
            infoitemstr.append(joinInputItems.get(i).getName()).append(",");
        }
    }
    params.put("InfoItemIds", String.valueOf(infoitemstr));
    params.put("App", String.valueOf(GlobalData.app));
    params.put("V", String.valueOf(Util.getVersionInfo(this)));
    params.put("Serial", Util.getIMEI(this));

    MultipartGsonRequest<JoinActivity> request = new MultipartGsonRequest<JoinActivity>(url, JoinActivity.class,
            zipFile, params, new Response.Listener<JoinActivity>() {
        @Override
        public void onResponse(JoinActivity joinActivity) {
            if (joinActivity.getCode() == 0) {
                MyToast.makeText(PublishActivities.this, "发布成功", Toast.LENGTH_SHORT);
            } else {
                MyToast.makeText(PublishActivities.this, joinActivity.getErrMsg(), Toast.LENGTH_LONG);
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError volleyError) {
            MyToast.makeText(PublishActivities.this, volleyError.toString(), Toast.LENGTH_LONG);
        }
    }) {

        @Override
        public String getBodyContentType() {
            return "multipart/form-data";
        }
    };


    request.setRetryPolicy(new DefaultRetryPolicy(10000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

// MySingleton.getInstance(this).addHttpStackToRequestQueue(request);
MySingleton.getInstance(this).addToRequestQueue(request);
}

其中 MySingleton.getInstance(this).addToRequestQueue(request) 如下。
public RequestQueue getRequestQueue() {
if (requestQueue == null) {
requestQueue = Volley.newRequestQueue(mCtx.getApplicationContext());
}
return requestQueue;
}

public <T> void addToRequestQueue(Request<T> req) {
    getRequestQueue().add(req);
}

[ayyb1988]

已解决。