如何使用Android Volley进行多部分数据

Question

我正在使用Volley为我的应用程序调用Web请求.但是,因为我是第一次排球.我只是想知道如何使用multipart通过凌空上传图像/视频媒体数据.

我搜索了很多网站,我得到了一些结果

如何使用Volley在Android中发送"multipart/form-data"POST

但是,这些方法看起来不好或有效.那么,请帮助我如何使用凌空上传媒体数据.或者我不应该使用Volley,应该采用以前的手动方法

无论如何,所有的想法和答案都非常感激.谢谢您的帮助.

Answer 1

不知道你是否有答案,但如果你没有尝试这个:

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;

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;

public class MultipartRequest extends Request<String> {

// private MultipartEntity entity = new MultipartEntity();

MultipartEntityBuilder entity = MultipartEntityBuilder.create();
HttpEntity httpentity;
private static final String FILE_PART_NAME = "file";

private final Response.Listener<String> mListener;
private final File mFilePart;
private final Map<String, String> mStringPart;

public MultipartRequest(String url, Response.ErrorListener errorListener,
        Response.Listener<String> listener, File file,
        Map<String, String> mStringPart) {
    super(Method.POST, url, errorListener);

    mListener = listener;
    mFilePart = file;
    this.mStringPart = mStringPart;
    entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
    buildMultipartEntity();
}

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

private void buildMultipartEntity() {
    entity.addPart(FILE_PART_NAME, new FileBody(mFilePart));
    for (Map.Entry<String, String> entry : mStringPart.entrySet()) {
        entity.addTextBody(entry.getKey(), entry.getValue());
    }
}

@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<String> parseNetworkResponse(NetworkResponse response) {
    return Response.success("Uploaded", getCacheEntry());
}

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

为了使它工作,你必须使用这个java httpclients:http: //hc.apache.org/downloads.cgi当我写这个答案(02/07/14)时,我使用的版本是4.3 0.2.

希望能帮助到你 !

Answer 2

你必须使用下面的代码使用带有排球的multipart上传图像.它就像我的应用程序中的魅力.

public class MultipartRequest extends Request<String> {

    private MultipartEntity entity = new MultipartEntity();

    private static final String FILE_PART_NAME = "file";
    private static final String STRING_PART_NAME = "text";

    private final Response.Listener<String> mListener;
    private final File mFilePart;
    private final String mStringPart;

    public MultipartRequest(String url, Response.ErrorListener errorListener, Response.Listener<String> listener, File file, String stringPart)
    {
        super(Method.POST, url, errorListener);

        mListener = listener;
        mFilePart = file;
        mStringPart = stringPart;
        buildMultipartEntity();
    }

    private void buildMultipartEntity()
    {
        entity.addPart(FILE_PART_NAME, new FileBody(mFilePart));
        try
        {
            entity.addPart(STRING_PART_NAME, new StringBody(mStringPart));
        }
        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)
    {
        return Response.success("Uploaded", getCacheEntry());
    }

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