How to send and receive bitmap on restful server

Question

Staff did a search and found very little content, I would like some tips because I never did it. How do I send and receive a bitmap to a server? Send with Json? Convert to Base64? What is the best way to send and how should my method be on the server to receive? Thanks

Answer 1

Simply upload as binary content.

String url = "http://seusite.com.br";
File file = new File(Environment.getExternalStorageDirectory()
                    .getAbsolutePath(),"suaImagem.jpg");
try {
    HttpClient httpclient = new DefaultHttpClient();

    HttpPost httppost = new HttpPost(url);

    InputStreamEntity reqEntity = new InputStreamEntity(
            new FileInputStream(file), -1);
    reqEntity.setContentType("binary/octet-stream");
    reqEntity.setChunked(true); // mande em pacotes separados se necessario
    httppost.setEntity(reqEntity);
    HttpResponse response = httpclient.execute(httppost);

} catch (Exception e) {
    // Trate seu erro
}

Adapted example of this answer.

Answer 2

Correct is to encode the image in Base64 and send it through the server, before sending, convert the image with Base64 to a Byte array and send this whole Object.

//Codificar uma imagem
Bitmap bitmap = BitmapFactory.decodeResource(getActivity().getResources(),
                    R.drawable.imagem);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] bitMapData = stream.toByteArray();
String encodedImage2 =Base64.encodeToString(bitMapData,Base64.DEFAULT);

//Decodificar
byte[] arquivo = null;
arquivo = Base64.decode(objeto.imagem.toString());