一個項目中用到的使用Volley上傳頭像文件的例子

/**

* Created by wangshihui on 2015/11/30.

* 上傳文件

*? url：.....

method：post

參數：file

接口給的參數：file 就是表單的key，傳給mFilePartName;

這是個測試類，測試上傳頭像沒有問題，適合只上傳單個文件的場景

*/

public class MultipartRequest extends Request {

private String mHeader;

private Map mMap;

private String cookieFromResp = "";

private Map headerMap = new HashMap<>();

private MultipartEntity entity = new MultipartEntity();

private final Response.Listener mListener;

private final File mFilePart;

private String mFilePartName;

/**

* @param url

* @param listener

* @param errorListener

* @param file_name

* @param file

*/

public MultipartRequest(String url, Response.Listener listener, Response.ErrorListener errorListener, String file_name,File file)

{

super(Method.POST, url, errorListener);

mListener = listener;

mFilePart = file;

mFilePartName=file_name;

buildMultipartEntity();

}

/**

* 添加文件參數

*/

private void buildMultipartEntity()

{

entity.addPart(mFilePartName, new FileBody(mFilePart));

}

@Override

public String getBodyContentType()

{

return entity.getContentType().getValue();

}

@Override

public byte[] getBody() throws AuthFailureError

{

ByteArrayOutputStream bos = new ByteArrayOutputStream();

try

{

entity.writeTo(bos);

}

catch (IOException e)

{

VolleyLog.e("IOException writing to ByteArrayOutputStream");

}

return bos.toByteArray();

}

/**

* @param response

* @return

*/

@Override

protected Response parseNetworkResponse(NetworkResponse response)

{

try {

JSONObject jsonObject;

System.out.println(response.headers.toString());

if (response.data.length != 0) {

String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));

jsonObject = new JSONObject(jsonString);

} else {

jsonObject = new JSONObject();

}

//獲取數據頭

mHeader = response.headers.toString();

//提取Cookie(JSESSIONID)

Pattern pattern = Pattern.compile("Set-Cookie=.*?;");

Matcher matcher = pattern.matcher(mHeader);

if (matcher.find()) {

cookieFromResp = matcher.group();

cookieFromResp = cookieFromResp.substring(11, cookieFromResp.length() - 1);

System.out.println("Cookie: " + cookieFromResp);

}

jsonObject.put("Cookie", cookieFromResp);

return Response.success(jsonObject,

HttpHeaderParser.parseCacheHeaders(response));

} catch (UnsupportedEncodingException e) {

return Response.error(new ParseError(e));

} catch (JSONException je) {

return Response.error(new ParseError(je));

}

}

/**

* @param response

*/

@Override

protected void deliverResponse(JSONObject response)

{

mListener.onResponse(response);

}

@Override

protected Map getParams() throws AuthFailureError {

return mMap;

}

/**

* @return

* @throws AuthFailureError

*/

@Override

public Map getHeaders() throws AuthFailureError {

return headerMap;

}

/**

* @return

*/

@Override

public RetryPolicy getRetryPolicy() {

RetryPolicy retryPolicy = new DefaultRetryPolicy(5000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);

return retryPolicy;

}

/**

* @param cookie

*/

//將Cookie加入數據頭

public void setSendCookie(String cookie) {

headerMap.put("Cookie", cookie);

}

}

調用方法如下：

//指定url路徑

String url = "http://182.92.....";

MultipartRequest multipartRequest = new MultipartRequest(

url, new Response.Listener() {

@Override

public void onResponse(JSONObject response) {

saveSessionID(response);

}

}, new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError e) {

Log.e(TAG, e.getMessage(), e);

try {

byte[] htmlBodyBytes = e.networkResponse.data;

Log.e(TAG, new String(htmlBodyBytes), e);

} catch (Exception e1) {

e1.printStackTrace();

}

ToastUtil.showShortToast(UserCenterActivity.this, "網絡連接異常");

}

}, "file", mSelectedPictureFile);

multipartRequest.setSendCookie(loadSessionID());

multipartRequest.setTag(TAG);

client.addTask(multipartRequest); private File mSelectedPictureFile;

mSelectedPictureFile是一個File文件，參數名是file

通信成功保存Cookie

saveSessionID(response);

發送請求上傳cookie

multipartRequest.setSendCookie(loadSessionID());

client是一個Volley的簡單封裝

protected AsynHttpClient client;

public class AsynHttpClient {

//volley的請求隊列

private RequestQueue requestQueue;

//保證全局變量是單一的

private static AsynHttpClient instance;

private Context mContext;

private AsynHttpClient(Context context) {

requestQueue = Volley.newRequestQueue(context);

this.mContext = context;

}

/**

* 單列模式，讓AsynHttpClient在整個項目中保持只有一個

* @param context

* @return

*/

public static AsynHttpClient getInstance(Context context) {

if (instance==null){

synchronized (AsynHttpClient.class){

if (instance==null){

instance=new AsynHttpClient(context);

}

}

}

return instance;

}

/**

* 添加任務到volley的請求隊列中去，并不會立即執行

* @param task

*/

public? void addTask(Request task){

requestQueue.add(task);

}

public RequestQueue getRequestQueue() {

return requestQueue;

}

}

總結

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