如何在 Android 中检测到人脸后将图像下载到图库？

Question

我可以借助 Google 的示例视觉应用程序FaceTracker 检测人脸。我想要做的是拍摄检测到的面部照片并将其下载到手机图库。

Answer 1

File imagesFolder = new File( Environment.getExternalStorageDirectory() , "FolderName" );
            imagesFolder.mkdirs();
            final File image = new File( imagesFolder , "/" + "IMG_" +System.currentTimeMillis() + ".png" );
            File file = new File( Environment.getExternalStorageDirectory() + "/" + System.currentTimeMillis() + ".png");
            imgCap.takePicture(image, new ImageCapture.OnImageSavedListener() {
                @Override
                public void onImageSaved(@NonNull File file) {
                    String msg = "Pic captured at " + image.getAbsolutePath();

                    //storing the image in a folder in gallery  

                    Intent mediaScanIntent = new Intent( Intent.ACTION_MEDIA_SCANNER_SCAN_FILE );
                    Uri contentUri = Uri.fromFile( image );
                    mediaScanIntent.setData( contentUri );
                   getActivity().sendBroadcast( mediaScanIntent );