Android Question Send a picture to google vision

  Dim outString As String="{"&QUOTE&"requests"&QUOTE&":[{"&QUOTE&"image"&QUOTE&":{"&QUOTE&"content"&QUOTE&":"&QUOTE&string64&QUOTE&"},"&QUOTE&"features"&QUOTE&":[{"&QUOTE&"type"&QUOTE&": "&QUOTE&"LABEL_DETECTION"&QUOTE&","&QUOTE&"maxResults"&QUOTE&": 2},{"&QUOTE&"type"&QUOTE&": "&QUOTE&"LANDMARK_DETECTION"&QUOTE&","&QUOTE&"maxResults"&QUOTE&": 2},{"&QUOTE&"type"&QUOTE&": "&QUOTE&"IMAGE_PROPERTIES"&QUOTE&","&QUOTE&"maxResults"&QUOTE&": 2}]}]}"

job.PostString("https://vision.googleapis.com/v1/images:annotate?key="&ApiKey&"",outString)

include_once("creds.php"); // Get $api_key
$cvurl = "https://vision.googleapis.com/v1/images:annotate?key=" . $api_key;
$type = "LANDMARK_DETECTION";

//Did they upload a file...
if($_FILES['photo']['name'])
{
   //if no errors...
   if(!$_FILES['photo']['error'])
   {
     $valid_file = true;
     //can't be larger than ~4 MB
     if($_FILES['photo']['size'] > (4024000))
     {
       $valid_file = false;
       die('Your file\'s size is too large.');
     }

     //if the file has passed the test
     if($valid_file)
     {
       //convert it to base64
       $fname = $_FILES['photo']['tmp_name'];
       $data = file_get_contents($fname);
       $base64 = base64_encode($data);
       //Create this JSON
       $r_json ='{
           "requests": [
           {
            "image": {
            "content":"' . $base64. '"
            },
            "features": [
            {
               "type": "' .$type. '",
               "maxResults": 200
            }
            ]
           }
         ]
       }';

       $curl = curl_init();
       curl_setopt($curl, CURLOPT_URL, $cvurl);
       curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
       curl_setopt($curl, CURLOPT_HTTPHEADER,
         array("Content-type: application/json"));
       curl_setopt($curl, CURLOPT_POST, true);
       curl_setopt($curl, CURLOPT_POSTFIELDS, $r_json);
       $json_response = curl_exec($curl);
       $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
       curl_close($curl);

       if ( $status != 200 ) {
        die("Error: $cvurl failed status $status" );
       }

       echo "<pre>";
       echo $json_response;
       echo "</pre>";
     }
   }
   //if there is an error...
   else
   {
     //set that to be the returned message
     echo "Error";
      die('Drror:  '.$_FILES['photo']['error']);
   }
}
?>

curl_setopt($curl, CURLOPT_URL, $cvurl);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER,
array("Content-type: application/json"));
curl_setopt($curl, CURLOPT_POST, true);

Job.PostString(...)
Job.GetRequest.SetContentType("application/json")