如何在进度条android上显示图像的下载进度？

Question

我能够下载图像，但不能在进度栏上显示下载进度。我正在从 Firebase数据库中检索图像。

我正在使用 Glide 库显示和下载图像。

下面是我用来下载图像的代码：

            Glide.with(ViewActivity.this)
                    .asBitmap()
                    .load(getIntent().getStringExtra("image"))
                    .into(new SimpleTarget<Bitmap>() {
                        @Override
                        public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {

                            saveImage(resource);

                        }

                        private String saveImage(Bitmap resource) {

                            String savedImagePath = null;

                            String fileName = title + ".jpg";

                            //String imageFileName = "JPEG_" + "FILE_NAME" + ".jpg";

                            File storageDir = new File(            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
                                    + "/WideWallz");
                            boolean success = true;
                            if (!storageDir.exists()) {
                                success = storageDir.mkdirs();
                            }
                            if (success) {
                                File imageFile = new File(storageDir, fileName);
                                savedImagePath = imageFile.getAbsolutePath();
                                try {
                                    OutputStream fOut = new FileOutputStream(imageFile);
                                    resource.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
                                    fOut.close();
                                } catch (Exception e) {
                                    e.printStackTrace();
                                }

                                // Add the image to the system gallery
                                galleryAddPic(savedImagePath);
                                Toast.makeText(getApplicationContext(), "Wallpaper saved to Gallery", Toast.LENGTH_LONG).show();

                                downloadProgress.setVisibility(View.GONE);
                                downloadWallpaperSmall.setVisibility(View.GONE);
                                check.setVisibility(View.VISIBLE);
                            }
                            return savedImagePath;
                        }

                        private void galleryAddPic(String imagePath) {
                            Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                            File f = new File(imagePath);
                            Uri contentUri = Uri.fromFile(f);
                            mediaScanIntent.setData(contentUri);
                            sendBroadcast(mediaScanIntent);

                        }
                    });