Android--用Valley框架去上传图片

1、除了用到了Volley，还用到了一个包httpmime(下载地址：http://download.csdn.net/detail/chequer_lkp/8102751)

2、需要一个工具类,该类是继承的Volley的Request

package newairtek.com.utils;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.HttpHeaderParser;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
* Created by Administrator on 2016/1/12.
* ---------Volley图片上传-------------
*/

public class MultipartRequest extends Request<String> {

private MultipartEntity entity = new MultipartEntity();

private final Response.Listener<String> mListener;

private List<File> mFileParts;
private String mFilePartName;
private Map<String, String> mParams;
/**
* 单个文件
* @param url
* @param errorListener
* @param listener
* @param filePartName
* @param file
* @param params
*/
public MultipartRequest(String url, Response.ErrorListener errorListener,
Response.Listener<String> listener, String filePartName, File file,
Map<String, String> params) {
super(Method.POST, url, errorListener);

mFileParts = new ArrayList<File>();
if (file != null) {
mFileParts.add(file);
}
mFilePartName = filePartName;
mListener = listener;
mParams = params;
buildMultipartEntity();
}
/**
* 多个文件，对应一个key
* @param url
* @param errorListener
* @param listener
* @param filePartName
* @param files
* @param params
*/
public MultipartRequest(String url, Response.ErrorListener errorListener,
Response.Listener<String> listener, String filePartName,
List<File> files, Map<String, String> params) {
super(Method.POST, url, errorListener);
mFilePartName = filePartName;
mListener = listener;
mFileParts = files;
mParams = params;
buildMultipartEntity();
}

private void buildMultipartEntity() {
if (mFileParts != null && mFileParts.size() > 0) {
for (File file : mFileParts) {
entity.addPart(mFilePartName, new FileBody(file));
}
long l = entity.getContentLength();
//            CLog.log(mFileParts.size()+"个，长度："+l);
}

try {
if (mParams != null && mParams.size() > 0) {
for (Map.Entry<String, String> entry : mParams.entrySet()) {
entity.addPart(
entry.getKey(),
new StringBody(entry.getValue(), Charset
.forName("UTF-8")));
}
}
} catch (UnsupportedEncodingException e) {
VolleyLog.e("UnsupportedEncodingException");
}
}

@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();
}

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
//        CLog.log("parseNetworkResponse");
if (VolleyLog.DEBUG) {
if (response.headers != null) {
for (Map.Entry<String, String> entry : response.headers
.entrySet()) {
VolleyLog.d(entry.getKey() + "=" + entry.getValue());
}
}
}

String parsed;
try {
parsed = new String(response.data,
HttpHeaderParser.parseCharset(response.headers));
} catch (UnsupportedEncodingException e) {
parsed = new String(response.data);
}
return Response.success(parsed,
HttpHeaderParser.parseCacheHeaders(response));
}

/*
* (non-Javadoc)
*
* @see com.android.volley.Request#getHeaders()
*/
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
VolleyLog.d("getHeaders");
Map<String, String> headers = super.getHeaders();

if (headers == null || headers.equals(Collections.emptyMap())) {
headers = new HashMap<String, String>();
}

return headers;
}

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

3、用法和Volley的其它请求方法基本上一样，只不过参数不太一样。