Multipart/form-data немного теории, просто первая ссылка подробнее сами найдете и вот пример с использованием библиотек httpcore и httpmime
private long loadPhoto(InputStream ims, String name) {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(Api.BASE_URL + Api.IMAGES);
MultipartEntityBuilder multipartEntity = MultipartEntityBuilder
.create();
try {
multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
multipartEntity.addBinaryBody("image[data]",
ims, ContentType.MULTIPART_FORM_DATA,
"name");
multipartEntity.addTextBody("token", Util.getToken(getApplicationContext()));
post.setEntity(multipartEntity.build());
HttpResponse response = client.execute(post);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
JSONObject object = new JSONObject(sb.toString());
Log.d("img id ", " " + object.getJSONObject("image").getLong("id"));
return object.getJSONObject("image").getLong("id");
} catch (IOException e) {
Log.e("img", e.getMessage());
} catch (Exception e) {
Log.e("img", e.getMessage());
}
return -1;
}