onCreate_method.java

ImageView pictureId = (ImageView)findViewById(R.id.pictureId);
BitmapDrawable drawableforimage = (BitmapDrawable) pictureId.getDrawable();
Bitmap bitmap = drawableforimage.getBitmap();

ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG,100,stream);
byte[] byteArray = stream.toByteArray();

ParseFile file = new ParseFile("grapefruit.jpg",byteArray);
ParseObject object = new ParseObject("Image");

object.put("image",file);
object.put("creator", "coffeeshots");

object.saveInBackground(new SaveCallback() {
    @Override
    public void done(ParseException e) {
        if(e == null){
            Toast.makeText(MainActivity.this,"Image has been shared",Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(MainActivity.this,"Issue uploading image",Toast.LENGTH_SHORT).show();
        }
    }
});