I was able to do this successfully with this code:
void getImage(String url, String userId, sessionToken) async{ var uri = Uri.parse(url);
Map body = {'Session': sessionToken, 'UserId': userId}; try { final response = await http.post(uri, headers: {"Content-Type": "application/json"}, body: utf8.encode(json.encode(body)));
if (response.contentLength == 0){ return; } Directory tempDir = await getTemporaryDirectory(); String tempPath = tempDir.path; File file = new File('$tempPath/$userId.png'); await file.writeAsBytes(response.bodyBytes); displayImage(file); } catch (value) { print(value); } }
Make changes as per your requirement. Thanks..!!

I was able to do this successfully with this code:
void getImage(String url, String userId, sessionToken) async{ var uri = Uri.parse(url); Map body = {'Session': sessionToken, 'UserId': userId}; try { final response = await http.post(uri, headers: {"Content-Type": "application/json"}, body: utf8.encode(json.encode(body))); if (response.contentLength == 0){ return; } Directory tempDir = await getTemporaryDirectory(); String tempPath = tempDir.path; File file = new File('$tempPath/$userId.png'); await file.writeAsBytes(response.bodyBytes); displayImage(file); } catch (value) { print(value); } }
Thanks for the help :)