json - How to write type adapter for GSON to send stream? -

one of fields of class filename. serialization i'm going write gson type adapter (implements jsonserializer<myclass>) should send file stream.

the problem don't want read file data (stream) , hold string in memory memory size limited (it's mobile device) , have send fields (filename f.e. below), json should like:

data: {     filename:"filename.png"     filedata:"(base64 file data stream here)" } 

what best way send file data in network field in case?

ps. network sending done apache http client if helps

it seems it's not architectural solution mix json , large binary data within 1 request body. 1 can use http multipart instead:

    httppost request = new httppost(url);      multipartentity multipartentity = new multipartentity();     request.setentity(multipartentity);      // body     try {         multipartentity.addpart("json", new stringbody(body, "application/json", charset.forname("utf-8")));     } catch (unsupportedencodingexception e) {         throw new resourceloadingexception(e);     }      // files     (int i=0; i<filespaths.size(); i++) {         string eachfilepath = filespaths.get(i);         file file = new file(eachfilepath);         multipartentity.addpart("file" + string.valueof(i), new filebody(file));     } 

what mobile devices android not support multipart bodies can add support (if using maven or gradle):

<dependency>     <groupid>org.apache.httpcomponents</groupid>     <artifactid>httpmime</artifactid>     <version>4.2.5</version> </dependency>