Android 如何通过http post将位图发送到face detect azure api

在我的Android应用程序中，用户通过摄像头拍照。然后，它以位图的形式提供：

Bitmap photo = (Bitmap) data.getExtras().get("data");

我想通过http post将其发送到Azure Face detect API。目前，我只能使用pic的给定URL：

StringEntity reqEntity = new StringEntity("{\"url\":\"https://upload.wikimedia.org/wikipedia/commons/c/c3/RH_Louise_Lillian_Gish.jpg\"}");
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(request)

如何使用位图照片将其发送到azure？

根据，您可以使用带有

应用程序/octet-stream

内容类型的API将android位图作为二进制数据传递

作为参考，这里是我的示例代码

String url = "https://westus.api.cognitive.microsoft.com/face/v1.0/detect";
HttpClient httpclient = new DefaultHttpClient();
HttpPost request = new HttpPost(url);
request.setHeader("Content-Type", "application/octet-stream")
request.setHeader("Ocp-Apim-Subscription-Key", "{subscription key}");

// Convert Bitmap to InputStream
Bitmap photo = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 100, baos);  
InputStream photoInputStream = new ByteArrayInputStream(baos.toByteArray());
// Use Bitmap InputStream to pass the image as binary data
InputStreamEntity reqEntity = new InputStreamEntity(photoInputStream, -1);
reqEntity.setContentType("image/jpeg");
reqEntity.setChunked(true);

request.setEntity(reqEntity);
HttpResponse response = httpclient.execute(request);

希望能有帮助