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。