上传使用谷歌排球图片 [英] Upload an image using Google Volley
本文介绍了上传使用谷歌排球图片的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要从应用程序上传一张图片,那我开发,到服务器,我想知道我怎么能发展多部分请求使用谷歌抽射加载图像。
I would need to upload an image from the application, that I'm developing, to the server and I would like to know how I can develop the Multipart Request to load the image using Google Volley.
感谢
推荐答案
我要上传通过图像谷歌凌空一个例子
。请看下图:
I have an example to upload images by Google Volley
. Take a look:
package net.colaborativa.exampleapp.api;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.HttpHeaderParser;
public class PhotoMultipartRequest<T> extends Request<T> {
private static final String FILE_PART_NAME = "file";
private MultipartEntityBuilder mBuilder = MultipartEntityBuilder.create();
private final Response.Listener<T> mListener;
private final File mImageFile;
protected Map<String, String> headers;
public PhotoMultipartRequest(String url, ErrorListener errorListener, Listener<T> listener, File imageFile){
super(Method.POST, url, errorListener);
mListener = listener;
mImageFile = imageFile;
buildMultipartEntity();
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = super.getHeaders();
if (headers == null
|| headers.equals(Collections.emptyMap())) {
headers = new HashMap<String, String>();
}
headers.put("Accept", "application/json");
return headers;
}
private void buildMultipartEntity(){
mBuilder.addBinaryBody(FILE_PART_NAME, mImageFile, ContentType.create("image/jpeg"), mImageFile.getName());
mBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
mBuilder.setLaxMode().setBoundary("xx").setCharset(Charset.forName("UTF-8"));
}
@Override
public String getBodyContentType(){
String contentTypeHeader = mBuilder.build().getContentType().getValue();
return contentTypeHeader;
}
@Override
public byte[] getBody() throws AuthFailureError{
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
mBuilder.build().writeTo(bos);
} catch (IOException e) {
VolleyLog.e("IOException writing to ByteArrayOutputStream bos, building the multipart request.");
}
return bos.toByteArray();
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
T result = null;
return Response.success(result, HttpHeaderParser.parseCacheHeaders(response));
}
@Override
protected void deliverResponse(T response) {
mListener.onResponse(response);
}
}
和您可以使用它是这样的:
And you can use it like this:
RequestQueue mQueue = Volley.newRequestQueue(context);
PhotoMultipartRequest imageUploadReq = new PhotoMultipartRequest(url, ErrorListener, Listener, imageFile);
mQueue.add(imageUploadReq);
我希望这些codeS会对你有所启发。
I hope these codes will inspire you.
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