如何使用volley android将图像上传到MVC api post方法。我试过这个：
StringRequest stringRequest = new StringRequest(Request.Method.POST, UPLOAD_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String responec) {
loading.dismiss();
Log.e("tag","data :"+responec);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
loading.dismiss();
Log.e("tag","data :"+volleyError.toString());
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
String image = getStringImage(bitmap);
Map<String,String> params = new Hashtable<String, String>();
params.put(KEY_IMAGE, image);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
我该怎么处理呢。
答案 0 :(得分：0)
这是几年前我遇到的一个项目中的事情，我只是提醒一下，也许可以为您提供帮助： 我编写了此类，以使用MVC API上传图像：
import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.HttpHeaderParser;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;
/**
* Custom request to make multipart header and upload file.
* <p>
* Created by vahid on 27/04/2017 12.05.
*/
public class VolleyMultipartRequest extends Request<NetworkResponse> {
private final String twoHyphens = "--";
private final String lineEnd = "\r\n";
private final String boundary = "apiclient-" + System.currentTimeMillis();
private Response.Listener<NetworkResponse> mListener;
private Response.ErrorListener mErrorListener;
private Map<String, String> mHeaders;
/**
* Default constructor with predefined header and post method.
*
* @param url request destination
* @param headers predefined custom header
* @param listener on success achieved 200 code from request
* @param errorListener on error http or library timeout
*/
public VolleyMultipartRequest(String url, Map<String, String> headers, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
super(Method.POST, url, errorListener); this.mListener = listener;
this.mErrorListener = errorListener; this.mHeaders = headers;
}
/**
* Constructor with option method and default header configuration.
*
* @param method method for now accept POST and GET only
* @param url request destination
* @param listener on success event handler
* @param errorListener on error event handler
*/
public VolleyMultipartRequest(int method, String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
super(method, url, errorListener); this.mListener = listener;
this.mErrorListener = errorListener;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return (mHeaders != null) ? mHeaders : super.getHeaders();
}
@Override
public String getBodyContentType() {
return "multipart/form-data;boundary=" + boundary;
}
@Override
public byte[] getBody() throws AuthFailureError {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
try {
// populate text payload
Map<String, String> params = getParams();
if (params != null && params.size() > 0) {
textParse(dos, params, getParamsEncoding());
}
// populate data byte payload
Map<String, DataPart> data = getByteData();
if (data != null && data.size() > 0) {
dataParse(dos, data);
}
// close multipart form data after text and file data
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
return bos.toByteArray();
} catch (IOException e) {
e.printStackTrace();
} return null;
}
/**
* Custom method handle data payload.
*
* @return Map data part label with data byte
* @throws AuthFailureError
*/
protected Map<String, DataPart> getByteData() throws AuthFailureError {
return null;
}
@Override
protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
try {
return Response.success(response, HttpHeaderParser.parseCacheHeaders(response));
} catch (Exception e) {
return Response.error(new ParseError(e));
}
}
@Override
protected void deliverResponse(NetworkResponse response) {
mListener.onResponse(response);
}
@Override
public void deliverError(VolleyError error) {
mErrorListener.onErrorResponse(error);
}
/**
* Parse string map into data output stream by key and value.
*
* @param dataOutputStream data output stream handle string parsing
* @param params string inputs collection
* @param encoding encode the inputs, default UTF-8
* @throws IOException
*/
private void textParse(DataOutputStream dataOutputStream, Map<String, String> params, String encoding) throws IOException {
try {
for (Map.Entry<String, String> entry : params.entrySet()) {
buildTextPart(dataOutputStream, entry.getKey(), entry.getValue());
}
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + encoding, uee);
}
}
/**
* Parse data into data output stream.
*
* @param dataOutputStream data output stream handle file attachment
* @param data loop through data
* @throws IOException
*/
private void dataParse(DataOutputStream dataOutputStream, Map<String, DataPart> data) throws IOException {
for (Map.Entry<String, DataPart> entry : data.entrySet()) {
buildDataPart(dataOutputStream, entry.getValue(), entry.getKey());
}
}
/**
* Write string data into header and data output stream.
*
* @param dataOutputStream data output stream handle string parsing
* @param parameterName name of input
* @param parameterValue value of input
* @throws IOException
*/
private void buildTextPart(DataOutputStream dataOutputStream, String parameterName, String parameterValue) throws IOException {
dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" + parameterName + "\"" + lineEnd);
//dataOutputStream.writeBytes("Content-Type: text/plain; charset=UTF-8" + lineEnd);
dataOutputStream.writeBytes(lineEnd);
dataOutputStream.writeBytes(parameterValue + lineEnd);
}
/**
* Write data file into header and data output stream.
*
* @param dataOutputStream data output stream handle data parsing
* @param dataFile data byte as DataPart from collection
* @param inputName name of data input
* @throws IOException
*/
private void buildDataPart(DataOutputStream dataOutputStream, DataPart dataFile, String inputName) throws IOException {
dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" + inputName + "\"; filename=\"" + dataFile.getFileName() + "\"" + lineEnd);
if (dataFile.getType() != null && !dataFile.getType().trim().isEmpty()) {
dataOutputStream.writeBytes("Content-Type: " + dataFile.getType() + lineEnd);
} dataOutputStream.writeBytes(lineEnd);
ByteArrayInputStream fileInputStream = new ByteArrayInputStream(dataFile.getContent());
int bytesAvailable = fileInputStream.available();
int maxBufferSize = 1024 * 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bufferSize];
int bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dataOutputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
dataOutputStream.writeBytes(lineEnd);
}
/**
* Simple data container use for passing byte file
*/
public class DataPart {
private String fileName;
private byte[] content;
private String type;
/**
* Default data part
*/
public DataPart() {
}
/**
* Constructor with data.
*
* @param name label of data
* @param data byte data
*/
public DataPart(String name, byte[] data) {
fileName = name; content = data;
}
/**
* Constructor with mime data type.
*
* @param name label of data
* @param data byte data
* @param mimeType mime data like "image/jpeg"
*/
public DataPart(String name, byte[] data, String mimeType) {
fileName = name; content = data; type = mimeType;
}
/**
* Getter file name.
*
* @return file name
*/
public String getFileName() {
return fileName;
}
/**
* Setter file name.
*
* @param fileName string file name
*/
public void setFileName(String fileName) {
this.fileName = fileName;
}
/**
* Getter content.
*
* @return byte file data
*/
public byte[] getContent() {
return content;
}
/**
* Setter content.
*
* @param content byte file data
*/
public void setContent(byte[] content) {
this.content = content;
}
/**
* Getter mime type.
*
* @return mime type
*/
public String getType() {
return type;
}
/**
* Setter mime type.
*
* @param type mime type
*/
public void setType(String type) {
this.type = type;
}
}
}
，通过这种方法，您可以使用和上传任何内容：
private void uploadFile(final Drawable drawable, final String filePath, final String fileName, final String fileType, String url, final String mmtype) {
VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
String resultResponse = new String(response.data);
try {
JSONObject jsonObject = new JSONObject(resultResponse);
String type_of_file = jsonObject.getString("type");
if (type_of_file.matches("Voice")) {
} else if (type_of_file.matches("Video")) {
} else if (type_of_file.matches("Image")) {
url_uploaded_image.add(url_uploaded_image.size(), resultResponse);
}
} catch (JSONException e) {
e.printStackTrace();
}
// Log.e("tag", "response :" + resultResponse);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
Log.e("tag", "error :" + error.toString());
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<>();
return params;
}
@Override
protected Map<String, DataPart> getByteData() {
Map<String, DataPart> params = new HashMap<>();
Log.e("tag", "data :" + params.toString());
params.put("", new DataPart(fileName + fileType, AppHelper.getFileDataFromFile(filePath)));
return params;
}
};
RequestQueue mRequestQueue = Volley.newRequestQueue(G.context);
mRequestQueue.add(multipartRequest);
}
答案 1 :(得分：-1)
对我来说，我总是将位图编码为base64 使用
public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality)
{
ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
image.compress(compressFormat, quality, byteArrayOS);
return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.DEFAULT);
}
然后将base64发送到您的API，
在反向模式下解码base64并使用
显示图像public static Bitmap decodeBase64(String input)
{
byte[] decodedBytes = Base64.decode(input, 0);
return BitmapFactory.decodeByteArray(decodedBytes, 0, decodedBytes.length);
}
ImageViewObject.setImageBitmap();