我想从我的Android应用程序上传文件(图像,文档等)到我的服务器。我在我的应用程序中使用Volley库进行网络调用。
我正在使用以下代码上传文件,但它没有执行任何操作。(最后显示凌空超时错误)
public class MultipartRequest extends Request<String> {
private MultipartEntity entity = new MultipartEntity();
private static final String FILE_PART_NAME = "file";
private final Response.Listener<String> mListener;
private final File mFilePart;
private String mStringPart,accessToken;
public MultipartRequest(String url, Response.ErrorListener errorListener, Response.Listener<String> listener, File file,String accessToken)
{
super(Method.POST, url, errorListener);
mListener = listener;
mFilePart = file;
this.accessToken = accessToken;
buildMultipartEntity();
}
private void buildMultipartEntity()
{
entity.addPart(FILE_PART_NAME, new FileBody(mFilePart));
try
{
entity.addPart("Content-Disposition", new StringBody("form-data"));
entity.addPart("dir_path", new StringBody("IzEzOjE3"));
}
catch (UnsupportedEncodingException e)
{
VolleyLog.e("UnsupportedEncodingException");
}
}
@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("Content-Type", "multipart/form-data");
headers.put("_pkta",accessToken);
return headers;
}
@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);
}
}
请帮我解决如何在android中实现文件上传(通过volley或其他任何方式)
答案 0 :(得分:1)
尝试
public MultiPartRequest(String url, String filePath, Response.Listener<String> listener, Response.ErrorListener errorListener)
{
super(Method.POST, url, errorListener);
entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
file = new File(filePath);
mListener = listener;
buildMultipartEntity();
}
另外,在我的情况下,我没有覆盖getHeaders,只是通过addPart传递了其他值,例如:
entity.addPart("file", new FileBody(file, "image/jpeg")); // for image
entity.addPart("id", new StringBody(userid));
希望这会有所帮助。