Comment envoyer un message" multipart/form-data " sur Android avec Volley

comme mentionné dans la présentation à l'e/s (environ 4:05), Volley" est terrible " pour les grandes charges utiles. Comme je l'ai compris, cela signifie de ne pas utiliser Volley pour la réception / l'envoi de (gros) fichiers. En regardant le code il semble qu'il n'est même pas conçu pour traiter des données de forme multipart (par exemple Demande.java a getBodyContentType() avec hardcoded "application/x-www-form-urlencoded"; HttpClientStack::createHttpRequest () ne peut gérer que byte[], etc...). Probablement vous serez en mesure de créer implémentation qui peut gérer multipart mais si j'étais vous, J'utiliserais juste HttpClient directement avec multipart Entity comme:

    HttpPost req = new HttpPost(composeTargetUrl());
    MultipartEntity entity = new MultipartEntity();
    entity.addPart(POST_IMAGE_VAR_NAME, new FileBody(toUpload));
    try {
        entity.addPart(POST_SESSION_VAR_NAME, new StringBody(uploadSessionId));
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }
    req.setEntity(entity);

Vous avez peut-être besoin le plus récent HttpClient (c'est à dire pas intégrés), ou encore mieux, utilisation de Volley avec les nouveaux HttpClient

Complète Multipart Demande avec l'Avancement du Téléchargement

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

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

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.beusoft.app.AppContext;

public class MultipartRequest extends Request<String> {

    MultipartEntityBuilder entity = MultipartEntityBuilder.create();
    HttpEntity httpentity;
    private String FILE_PART_NAME = "files";

    private final Response.Listener<String> mListener;
    private final File mFilePart;
    private final Map<String, String> mStringPart;
    private Map<String, String> headerParams;
    private final MultipartProgressListener multipartProgressListener;
    private long fileLength = 0L;

    public MultipartRequest(String url, Response.ErrorListener errorListener,
            Response.Listener<String> listener, File file, long fileLength,
            Map<String, String> mStringPart,
            final Map<String, String> headerParams, String partName,
            MultipartProgressListener progLitener) {
        super(Method.POST, url, errorListener);

        this.mListener = listener;
        this.mFilePart = file;
        this.fileLength = fileLength;
        this.mStringPart = mStringPart;
        this.headerParams = headerParams;
        this.FILE_PART_NAME = partName;
        this.multipartProgressListener = progLitener;

        entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        try {
            entity.setCharset(CharsetUtils.get("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        buildMultipartEntity();
        httpentity = entity.build();
    }

    // public void addStringBody(String param, String value) {
    // if (mStringPart != null) {
    // mStringPart.put(param, value);
    // }
    // }

    private void buildMultipartEntity() {
        entity.addPart(FILE_PART_NAME, new FileBody(mFilePart, ContentType.create("image/gif"), mFilePart.getName()));
        if (mStringPart != null) {
            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.writeTo(new CountingOutputStream(bos, fileLength,
                    multipartProgressListener));
        } catch (IOException e) {
            VolleyLog.e("IOException writing to ByteArrayOutputStream");
        }
        return bos.toByteArray();
    }

    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {

        try {
//          System.out.println("Network Response "+ new String(response.data, "UTF-8"));
            return Response.success(new String(response.data, "UTF-8"),
                    getCacheEntry());
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            // fuck it, it should never happen though
            return Response.success(new String(response.data), getCacheEntry());
        }
    }

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

//Override getHeaders() if you want to put anything in header

    public static interface MultipartProgressListener {
        void transferred(long transfered, int progress);
    }

    public static class CountingOutputStream extends FilterOutputStream {
        private final MultipartProgressListener progListener;
        private long transferred;
        private long fileLength;

        public CountingOutputStream(final OutputStream out, long fileLength,
                final MultipartProgressListener listener) {
            super(out);
            this.fileLength = fileLength;
            this.progListener = listener;
            this.transferred = 0;
        }

        public void write(byte[] b, int off, int len) throws IOException {
            out.write(b, off, len);
            if (progListener != null) {
                this.transferred += len;
                int prog = (int) (transferred * 100 / fileLength);
                this.progListener.transferred(this.transferred, prog);
            }
        }

        public void write(int b) throws IOException {
            out.write(b);
            if (progListener != null) {
                this.transferred++;
                int prog = (int) (transferred * 100 / fileLength);
                this.progListener.transferred(this.transferred, prog);
            }
        }

    }
}

Exemple D'Utilisation

protected <T> void uploadFile(final String tag, final String url,
            final File file, final String partName,         
            final Map<String, String> headerParams,
            final Response.Listener<String> resultDelivery,
            final Response.ErrorListener errorListener,
            MultipartProgressListener progListener) {
        AZNetworkRetryPolicy retryPolicy = new AZNetworkRetryPolicy();

        MultipartRequest mr = new MultipartRequest(url, errorListener,
                resultDelivery, file, file.length(), null, headerParams,
                partName, progListener);

        mr.setRetryPolicy(retryPolicy);
        mr.setTag(tag);

        Volley.newRequestQueue(this).add(mr);

    }

mise à jour 2015/08/26:

si vous ne voulez pas utiliser httpentity déprécié, voici mon code d'échantillon de travail (Testé avec ASP.Net WebAPI)

Multipartactivité.java

package com.example.volleyapp;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.view.Menu;
import android.view.MenuItem;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.example.volleyapp.BaseVolleyRequest;
import com.example.volleyapp.VolleySingleton;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class MultipartActivity extends Activity {

    final Context mContext = this;
    String mimeType;
    DataOutputStream dos = null;
    String lineEnd = "\r\n";
    String boundary = "apiclient-" + System.currentTimeMillis();
    String twoHyphens = "--";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1024 * 1024;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_multipart);             

        Drawable drawable = ContextCompat.getDrawable(mContext, R.drawable.ic_action_file_attachment_light);
        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
        final byte[] bitmapData = byteArrayOutputStream.toByteArray();
        String url = "http://192.168.1.100/api/postfile";

        mimeType = "multipart/form-data;boundary=" + boundary;

        BaseVolleyRequest baseVolleyRequest = new BaseVolleyRequest(1, url, new Response.Listener<NetworkResponse>() {
            @Override
            public void onResponse(NetworkResponse response) {

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        }) {
            @Override
            public String getBodyContentType() {
                return mimeType;
            }

            @Override
            public byte[] getBody() throws AuthFailureError {
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                dos = new DataOutputStream(bos);
                try {
                    dos.writeBytes(twoHyphens + boundary + lineEnd);
                    dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
                            + "ic_action_file_attachment_light.png" + "\"" + lineEnd);
                    dos.writeBytes(lineEnd);
                    ByteArrayInputStream fileInputStream = new ByteArrayInputStream(bitmapData);
                    bytesAvailable = fileInputStream.available();

                    bufferSize = Math.min(bytesAvailable, maxBufferSize);
                    buffer = new byte[bufferSize];

                    // read file and write it into form...
                    bytesRead = fileInputStream.read(buffer, 0, bufferSize);

                    while (bytesRead > 0) {
                        dos.write(buffer, 0, bufferSize);
                        bytesAvailable = fileInputStream.available();
                        bufferSize = Math.min(bytesAvailable, maxBufferSize);
                        bytesRead = fileInputStream.read(buffer, 0, bufferSize);
                    }

                    // send multipart form data necesssary after file data...
                    dos.writeBytes(lineEnd);
                    dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

                    return bos.toByteArray();

                } catch (IOException e) {
                    e.printStackTrace();
                }
                return bitmapData;
            }
        };

        VolleySingleton.getInstance(mContext).addToRequestQueue(baseVolleyRequest);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_multipart, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

BaseVolleyRequest.java:

package com.example.volleyapp;

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 com.google.gson.JsonSyntaxException;


public class BaseVolleyRequest extends Request<NetworkResponse> {

    private final Response.Listener<NetworkResponse> mListener;
    private final Response.ErrorListener mErrorListener;

    public BaseVolleyRequest(String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
        super(0, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
    }

    public BaseVolleyRequest(int method, String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
        super(method, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
    }

    @Override
    protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
        try {
            return Response.success(
                    response,
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (JsonSyntaxException e) {
            return Response.error(new ParseError(e));
        } catch (Exception e) {
            return Response.error(new ParseError(e));
        }
    }

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

    @Override
    protected VolleyError parseNetworkError(VolleyError volleyError) {
        return super.parseNetworkError(volleyError);
    }

    @Override
    public void deliverError(VolleyError error) {
        mErrorListener.onErrorResponse(error);
    }
}

FIN DE LA MISE À JOUR

c'est mon échantillon de travail code (testé uniquement avec des fichiers de petite taille):

public class FileUploadActivity extends Activity {

    private final Context mContext = this;
    HttpEntity httpEntity;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_file_upload);   

        Drawable drawable = getResources().getDrawable(R.drawable.ic_action_home);
        if (drawable != null) {
            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
            final byte[] bitmapdata = stream.toByteArray();
            String url = "http://10.0.2.2/api/fileupload";
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

            // Add binary body
            if (bitmapdata != null) {
                ContentType contentType = ContentType.create("image/png");
                String fileName = "ic_action_home.png";
                builder.addBinaryBody("file", bitmapdata, contentType, fileName);
                httpEntity = builder.build();

                MyRequest myRequest = new MyRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
                    @Override
                    public void onResponse(NetworkResponse response) {
                        try {                            
                            String jsonString = new String(response.data,
                                    HttpHeaderParser.parseCharset(response.headers));
                            Toast.makeText(mContext, jsonString, Toast.LENGTH_SHORT).show();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(mContext, error.toString(), Toast.LENGTH_SHORT).show();                        
                    }
                }) {
                    @Override
                    public String getBodyContentType() {
                        return httpEntity.getContentType().getValue();
                    }

                    @Override
                    public byte[] getBody() throws AuthFailureError {
                        ByteArrayOutputStream bos = new ByteArrayOutputStream();
                        try {
                            httpEntity.writeTo(bos);
                        } catch (IOException e) {
                            VolleyLog.e("IOException writing to ByteArrayOutputStream");
                        }
                        return bos.toByteArray();
                    }
                };

                MySingleton.getInstance(this).addToRequestQueue(myRequest);
            }
        }
    }

    ...
}

public class MyRequest extends Request<NetworkResponse>

une approche très simple pour le dev qui veut simplement envoyer des paramètres de POST dans une requête multipart.

effectuer les changements suivants dans la classe qui étend requête.java

définir D'abord ces constantes:

String BOUNDARY = "s2retfgsGSRFsERFGHfgdfgw734yhFHW567TYHSrf4yarg"; //This the boundary which is used by the server to split the post parameters.
String MULTIPART_FORMDATA = "multipart/form-data;boundary=" + BOUNDARY;

ajouter une fonction d'aide pour créer un corps de post pour vous :

private String createPostBody(Map<String, String> params) {
        StringBuilder sbPost = new StringBuilder();
        if (params != null) {
            for (String key : params.keySet()) {
                if (params.get(key) != null) {
                    sbPost.append("\r\n" + "--" + BOUNDARY + "\r\n");
                    sbPost.append("Content-Disposition: form-data; name=\"" + key + "\"" + "\r\n\r\n");
                    sbPost.append(params.get(key).toString());
                }
            }
        }
        return sbPost.toString();
    } 

outrepasser getBody () et getBodyContentType

public String getBodyContentType() {
    return MULTIPART_FORMDATA;
}

public byte[] getBody() throws AuthFailureError {
        return createPostBody(getParams()).getBytes();
}

première réponse sur SO.

j'ai rencontré le même problème et j'ai trouvé le code de @alex très utile. J'ai fait quelques modifications simples afin de passer autant de paramètres que nécessaire à travers HashMap, et j'ai essentiellement copié parseNetworkResponse() à partir de StringRequest. J'ai cherché en ligne et donc surpris de découvrir qu'une telle tâche commune est donc rarement une réponse. Quoi qu'il en soit, j'aimerais que le code puisse aider:

public class MultipartRequest extends Request<String> {

private MultipartEntity entity = new MultipartEntity();

private static final String FILE_PART_NAME = "image";

private final Response.Listener<String> mListener;
private final File file;
private final HashMap<String, String> params;

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

    mListener = listener;
    this.file = file;
    this.params = params;
    buildMultipartEntity();
}

private void buildMultipartEntity()
{
    entity.addPart(FILE_PART_NAME, new FileBody(file));
    try
    {
        for ( String key : params.keySet() ) {
            entity.addPart(key, new StringBody(params.get(key)));
        }
    }
    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();
}

/**
 * copied from Android StringRequest class
 */
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
    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));
}

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

et vous pouvez utiliser le classe comme suit:

    HashMap<String, String> params = new HashMap<String, String>();

    params.put("type", "Some Param");
    params.put("location", "Some Param");
    params.put("contact",  "Some Param");


    MultipartRequest mr = new MultipartRequest(url, new Response.Listener<String>(){

        @Override
        public void onResponse(String response) {
            Log.d("response", response);
        }

    }, new Response.ErrorListener(){

        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e("Volley Request Error", error.getLocalizedMessage());
        }

    }, f, params);

    Volley.newRequestQueue(this).add(mr);

une autre solution, très légère avec de hautes performances avec une grande charge utile:

bibliothèque client Http asynchrone Android: http://loopj.com/android-async-http /

private static AsyncHttpClient client = new AsyncHttpClient();

private void uploadFileExecute(File file) {

    RequestParams params = new RequestParams();

    try { params.put("photo", file); } catch (FileNotFoundException e) {}

    client.post(getUrl(), params,

        new AsyncHttpResponseHandler() {

            public void onSuccess(String result) {

                Log.d(TAG,"uploadFile response: "+result);

            };

            public void onFailure(Throwable arg0, String errorMsg) {

                Log.d(TAG,"uploadFile ERROR!");

            };

        }

    );

}

Voici une Solution Simple et exemple complet pour le téléchargement de fichier en utilisant Volley Android""

1) Grad Import

compile 'dev.dworks.libs:volleyplus:+'

2)Créez maintenant une classe RequestManager

public class RequestManager {
    private static RequestManager mRequestManager;
    /**
     * Queue which Manages the Network Requests :-)
     */
    private static RequestQueue mRequestQueue;
    // ImageLoader Instance

    private RequestManager() {

    }

    public static RequestManager get(Context context) {

        if (mRequestManager == null)
            mRequestManager = new RequestManager();

        return mRequestManager;
    }

    /**
     * @param context application context
     */
    public static RequestQueue getnstance(Context context) {

        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(context);
        }

        return mRequestQueue;

    }


}

3)maintenant créer une classe pour traiter la demande de téléchargement de fichier WebService

public class WebService {
    private RequestQueue mRequestQueue;
    private static WebService apiRequests = null;

    public static WebService getInstance() {
        if (apiRequests == null) {
            apiRequests = new WebService();
            return apiRequests;
        }
        return apiRequests;
    }
    public void updateProfile(Context context, String doc_name, String doc_type, String appliance_id, File file, Response.Listener<String> listener, Response.ErrorListener errorListener) {
        SimpleMultiPartRequest request = new SimpleMultiPartRequest(Request.Method.POST, "YOUR URL HERE", listener, errorListener);
//        request.setParams(data);
        mRequestQueue = RequestManager.getnstance(context);
        request.addMultipartParam("token", "text", "tdfysghfhsdfh");
        request.addMultipartParam("parameter_1", "text", doc_name);
        request.addMultipartParam("dparameter_2", "text", doc_type);
        request.addMultipartParam("parameter_3", "text", appliance_id);
            request.addFile("document_file", file.getPath());

        request.setFixedStreamingMode(true);
        mRequestQueue.add(request);
    }
}

4) et maintenant appeler la méthode comme ceci pour frapper le service

public class Main2Activity extends AppCompatActivity implements Response.ErrorListener, Response.Listener<String>{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Button button=(Button)findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                uploadData();
            }
        });
    }

    private void uploadData() {
        WebService.getInstance().updateProfile(getActivity(), "appl_doc", "appliance", "1", mChoosenFile, this, this);
    }

    @Override
    public void onErrorResponse(VolleyError error) {

    }

    @Override
    public void onResponse(String response) {
     //Your response here 
    }
}

C'est ma façon de faire. Il peut être utile à d'autres :

private void updateType(){
    // Log.i(TAG,"updateType");
     StringRequest request = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {

         @Override
         public void onResponse(String response) {
             // running on main thread-------
             try {
                 JSONObject res = new JSONObject(response);
                 res.getString("result");
                 System.out.println("Response:" + res.getString("result"));

                 }else{
                     CustomTast ct=new CustomTast(context);
                     ct.showCustomAlert("Network/Server Disconnected",R.drawable.disconnect);
                 }

             } catch (Exception e) {
                 e.printStackTrace();

                 //Log.e("Response", "==> " + e.getMessage());
             }
         }
     }, new Response.ErrorListener() {
         @Override
         public void onErrorResponse(VolleyError volleyError) {
             // running on main thread-------
             VolleyLog.d(TAG, "Error: " + volleyError.getMessage());

         }
     }) {
         protected Map<String, String> getParams() {
             HashMap<String, String> hashMapParams = new HashMap<String, String>();
             hashMapParams.put("key", "value");
             hashMapParams.put("key", "value");
             hashMapParams.put("key", "value"));
             hashMapParams.put("key", "value");
             System.out.println("Hashmap:" + hashMapParams);
             return hashMapParams;
         }
     };
     AppController.getInstance().addToRequestQueue(request);

 }