图像捕获，保存文件... Android / Parse

Posted 2021-05-05

我试图在android应用程序中将从移动设备捕获的图像文件保存到Parse。我正在使用最终的File mediaFile。我想我的问题是，我知道我需要将文件转换为字节数组...我已经尝试了各种方法来做到这一点。我可以在预览中看到图像...但我似乎无法将其保存到Parse。

谢谢你的帮助。

 public Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));

    }


    /**
     * returning image / video
     */
    private File getOutputMediaFile(int type) {

        // External sdcard location
        String appName = CameraActivity.this.getString(R.string.app_name);
        File mediaStorageDir = new File(
                Environment
                        .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
                appName);

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d(appName, "Oops! Failed create "
                        + appName + " directory");
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
                Locale.getDefault()).format(new Date());
        final File mediaFile;
        if (type == MEDIA_TYPE_IMAGE) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator
                    + "IMG_" + timeStamp + ".jpg");
        } else {
            return null;
        }




            final ParseFile photoFile;

            FileInputStream fileInputStream=null;


            byte[] bFile = new byte[(int) mediaFile.length()];

            try {
                //convert file into array of bytes
                byte[] data2;

                FileInputStream fis = new FileInputStream(mediaFile);
                FileChannel fc = fis.getChannel();
                int sz = (int)fc.size();
                MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, sz);
                data2 = new byte[bb.remaining()];
                bb.get(data2);
                // Save the image to Parse
                photoFile = new ParseFile("profile_photo.jpg", data2);
                photoFile.saveInBackground();
                mCurrentUser.getCurrentUser();
                mCurrentUser.put("ProfilePhoto", photoFile);
                mCurrentUser.saveInBackground();

                System.out.println("Done");
            }catch(Exception e) {
                e.printStackTrace();

            }

            return mediaFile;
        }


    }

答案

我试过这个，它的工作对我来说......！

currentUser = ParseUser.getCurrentUser();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
// Compress image to lower quality scale 1 - 100
//here bitmap is your selected photo's bitmap    
bitmapProfilePic.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] image = stream.toByteArray();
final ParseFile file = new ParseFile("Profile.png", image);
file.saveInBackground(new SaveCallback() {
      @Override
      public void done(ParseException e) {
            if (e == null) {

            currentUser.put("ProfilePhoto", file);
            currentUser.saveInBackground(new SaveCallback() {
                     @Override
                     public void done(ParseException e) {
                          if (e == null) {
                                    Toast.makeText(context, "Updated..!!", Toast.LENGTH_LONG).show();
                                }
                            }
                        });
                        Toast.makeText(context, "Picture Updated..!!", Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(context, "Error to " + e.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }
            });

在你的情况下，你已经在data2中的字节数据，所以，...

final ParseFile file = new ParseFile("YourPhotoName.jpg", data2);
file.saveInBackground(new SaveCallback() {
      @Override
      public void done(ParseException e) {
            if (e == null) {

            currentUser.put("ProfilePhoto", file);
            currentUser.saveInBackground(new SaveCallback() {
                     @Override
                     public void done(ParseException e) {
                          if (e == null) {
                                    Toast.makeText(context, "Updated..!!", Toast.LENGTH_LONG).show();
                                }
                            }
                        });
                        Toast.makeText(context, "Picture Updated..!!", Toast.LENGTH_LONG).show();
                    } else {
                        Toast.makeText(context, "Error to " + e.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }
            });

另一答案

您可以尝试压缩成JPEG格式，因为JPEG压缩会导致图像尺寸比PNG图像尺寸小。

试试这段代码：

bitmapProfilePic.compress(Bitmap.CompressFormat.JPEG, 100, stream);