Getting size of an image(in kb or mb) selected from gallery programatically

Question

I am selecting an image from gallery.I want to determine the size of the image programatically in kb or mb. This is what I have written:

public String calculateFileSize(Uri filepath)
{
    //String filepathstr=filepath.toString();
    File file = new File(filepath.getPath());

    // Get length of file in bytes
    long fileSizeInBytes = file.length();
    // Convert the bytes to Kilobytes (1 KB = 1024 Bytes)
    long fileSizeInKB = fileSizeInBytes / 1024;
    // Convert the KB to MegaBytes (1 MB = 1024 KBytes)
    long fileSizeInMB = fileSizeInKB / 1024;

    String calString=Long.toString(fileSizeInMB);
    return calString;
}

The uri of the image when selected from gallery is coming perfectly.But the value of fileSizeInBytes is zero.I am calling this method on onActivityResult ,after selecting the image from gallery.I saw a few same questions asked here before.But none worked for me.Any solution?

Answer 1

Change

public String calculateFileSize(Uri filepath)
{
  //String filepathstr=filepath.toString();
  File file = new File(filepath.getPath());

  long fileSizeInKB = fileSizeInBytes / 1024;
  // Convert the KB to MegaBytes (1 MB = 1024 KBytes)
  long fileSizeInMB = fileSizeInKB / 1024;

  String calString=Long.toString(fileSizeInMB);

to

public String calculateFileSize(String filepath)
{
  //String filepathstr=filepath.toString();
  File file = new File(filepath);

  float fileSizeInKB = fileSizeInBytes / 1024;
  // Convert the KB to MegaBytes (1 MB = 1024 KBytes)
  float fileSizeInMB = fileSizeInKB / 1024;

  String calString=Float.toString(fileSizeInMB);

When you use long it will truncate all the digits after . So if your size is of less than 1MB you will get 0.

So instead use float in place of long

Answer 2

Just try this one and it will work for you

private void getImageSize(Uri choosen) throws IOException {
        Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), choosen);

        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
        byte[] imageInByte = stream.toByteArray();
        long lengthbmp = imageInByte.length;

        Toast.makeText(getApplicationContext(),Long.toString(lengthbmp),Toast.LENGTH_SHORT).show();

    }

And on result

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch(requestCode) {
            case SELECT_PHOTO:
                if(resultCode == RESULT_OK){
                    Uri selectedImage = data.getData();

                    if(selectedImage !=null){

                        img.setImageURI(selectedImage);

                        try {
                            getImageSize(choosenPhoto);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        //txt1.setText("Initial size: " +getImageSize(choosenPhoto)+ " Kb");
                    }
                }
        }
    }