Multipart/form-data Enctype Json For Android

I want to upload image and its information. I wanna to use multipart/ form data json for android. I have also seen this Stack Overflow question Android:How to upload .mp3 file and

Solution 1:

You can use this SimpleMultipartEntity class for sending Multipart data :

publicclassSimpleMultipartEntityimplementsHttpEntity {

private final static char[] MULTIPART_CHARS = "-_1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
        .toCharArray();

privateString boundary = null;
ByteArrayOutputStream out = newByteArrayOutputStream();
boolean isSetLast = false;
boolean isSetFirst = false;

publicSimpleMultipartEntity() {
    final StringBuffer buf = newStringBuffer();
    final Random rand = newRandom();
    for (int i = 0; i < 30; i++) {
        buf.append(MULTIPART_CHARS[rand.nextInt(MULTIPART_CHARS.length)]);
    }
    this.boundary = buf.toString();

}

publicvoidwriteFirstBoundaryIfNeeds() {
    if (!isSetFirst) {
        try {
            out.write(("--" + boundary + "\r\n").getBytes());
        } catch (final IOException e) {
            e.printStackTrace();
        }
    }
    isSetFirst = true;
}

publicvoidwriteLastBoundaryIfNeeds() {
    if (isSetLast) {
        return;
    }
    try {
        out.write(("\r\n--" + boundary + "--\r\n").getBytes());
    } catch (final IOException e) {
        e.printStackTrace();
    }
    isSetLast = true;
}

publicvoidaddPart(final String key, final String value) {
    writeFirstBoundaryIfNeeds();
    try {
        out.write(("Content-Disposition: form-data; name=\"" + key + "\"\r\n")
                .getBytes());
        out.write("Content-Type: text/plain; charset=UTF-8\r\n".getBytes());
        out.write("Content-Transfer-Encoding: 8bit\r\n\r\n".getBytes());
        out.write(value.getBytes());
        out.write(("\r\n--" + boundary + "\r\n").getBytes());
    } catch (final IOException e) {
        e.printStackTrace();
    }
}

publicvoidaddPart(final String key, final String fileName,
        final InputStream fin) {
    addPart(key, fileName, fin, "application/octet-stream");
}

publicvoidaddPart(final String key, final String fileName,
        final InputStream fin, Stringtype) {
    writeFirstBoundaryIfNeeds();
    try {
        type = "Content-Type: " + type + "\r\n";
        out.write(("Content-Disposition: form-data; name=\"" + key
                + "\"; filename=\"" + fileName + "\"\r\n").getBytes());
        out.write(type.getBytes());
        out.write("Content-Transfer-Encoding: binary\r\n\r\n".getBytes());

        final byte[] tmp = new byte[4096];
        int l = 0;
        while ((l = fin.read(tmp)) != -1) {
            out.write(tmp, 0, l);
        }
        out.flush();
    } catch (final IOException e) {
        e.printStackTrace();
    } finally {
        try {
            fin.close();
        } catch (final IOException e) {
            e.printStackTrace();
        }
    }
}

publicvoidaddPart(final String key, final File value) {
    try {
        addPart(key, value.getName(), newFileInputStream(value));
    } catch (final FileNotFoundException e) {
        e.printStackTrace();
    }
}

publicStringgetBoundary() {
    return boundary;
}

publicvoidsetBoundary(String boundary) {
    this.boundary = boundary;
}

@Overridepublic long getContentLength() {
    writeLastBoundaryIfNeeds();
    return out.toByteArray().length;
}

@OverridepublicHeadergetContentType() {
    returnnewBasicHeader("Content-Type", "multipart/form-data; boundary="
            + boundary);
}

@OverridepublicbooleanisChunked() {
    returnfalse;
}

@OverridepublicbooleanisRepeatable() {
    returnfalse;
}

@OverridepublicbooleanisStreaming() {
    returnfalse;
}

@OverridepublicvoidwriteTo(final OutputStream outstream) throws IOException {
    outstream.write(out.toByteArray());
}

@OverridepublicHeadergetContentEncoding() {
    returnnull;
}

@OverridepublicvoidconsumeContent() throws IOException,
        UnsupportedOperationException {
    if (isStreaming()) {
        thrownewUnsupportedOperationException(
                "Streaming entity does not implement #consumeContent()");
    }
}

@OverridepublicInputStreamgetContent() throws IOException,
        UnsupportedOperationException {
    returnnewByteArrayInputStream(out.toByteArray());
}

} 

Usage :

StringserviceUri="service url";
    InputStreamfileInputStream= mInputStream; //Your file streamStringfileName="your file name";
    StringfileKey="Key name what server is looking for"
    HashMap<String, String> headerparts = mHeaderParts; //Other header parts that you need to send along.HttpClienthttpClient=newDefaultHttpClient();
    HttpPosthttpPost=newHttpPost(serviceUri);
    SimpleMultipartEntityentity=newSimpleMultipartEntity();
    httpPost.setHeader("Accept", "application/json");
    httpPost.setHeader("Content-type", "multipart/form-data; boundary="
            + entity.getBoundary());
    entity.writeFirstBoundaryIfNeeds();

    if (headerparts != null) {
        Object[] keySet = headerparts.keySet().toArray();
        for (inti=0; i < keySet.length; i++) {
            Stringkey= keySet[i].toString();
            Stringvalue= headerparts.get(key);
            entity.addPart(key, value);
        }
    }

    entity.addPart(fileKey, fileName, fileInputStream);
    entity.writeLastBoundaryIfNeeds();
    httpPost.setEntity(entity);

    try {
        mResponse = httpClient.execute(httpPost);
    } catch (Exception e) {
        e.printStackTrace();
    }