Is it possible to zip a bytearray/bitmap to a specific size?

Question

I was trying to save images into the SQLite database, but even I compress and rescale my bitmap, the file was still too big, especially when you capture a image from the phone's camera.

Is there anyway to zip the bytearray/bitmap into a specific size like from 4mb to 500kb? If yes, how can I do that?

private void uriToFile(Uri uri, File sdImageMainDirectory) throws IOException {

        Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
        OutputStream stream = new FileOutputStream(sdImageMainDirectory);

        int bitmapWidth = bitmap.getWidth();
        int bitmapHeight = bitmap.getHeight();
        int maxSize = 10;

        float bitmapRatio = (float) bitmapWidth / (float) bitmapHeight;

        if(bitmapRatio > 0){
            bitmapWidth = maxSize;
            bitmapHeight = (int) (bitmapWidth / bitmapRatio);
        }
        else{
            bitmapHeight = maxSize;
            bitmapWidth = (int) (bitmapHeight * bitmapRatio);
        }
        bitmap.createScaledBitmap(bitmap, bitmapWidth, bitmapHeight, true);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 30, stream);
        stream.flush();
        stream.close();
}

Answer 1

You're not actually compressing the scaled image, but rather, the original one. Change the last four lines to this:

Bitmap scaled = bitmap.createScaledBitmap(bitmap, bitmapWidth, bitmapHeight, true);
scaled.compress(Bitmap.CompressFormat.JPEG, 30, stream);
stream.flush();
stream.close();

createScaledBitmap() returns the scaled bitmap, and you just lost the result.

You should be able to set maxSize to 1000 and see file sizes below 500k.