private void sendImage(Bitmap bm){    ByteArrayOutputStream stream = new ByteArrayOutputStream();    bm.compress(Bitmap.CompressFormat.PNG, 60, stream);    byte[] bytes = stream.toByteArray();    String img = new String(Base64.encodeToString(bytes, Base64.DEFAULT));    AsyncHttpClient client = new AsyncHttpClient();    RequestParams params = new RequestParams();    params.add("img", img);    client.post("http:xxx/postIcon", params, new AsyncHttpResponseHandler() {        @Override        public void onSuccess(int i, Header[] headers, byte[] bytes) {            Toast.makeText(MainActivity.this, "Upload Success!", Toast.LENGTH_LONG).show();        }        @Override        public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {            Toast.makeText(MainActivity.this, "Upload Fail!", Toast.LENGTH_LONG).show();        }    });}