Reduce size of Bitmap to some specified pixel in Android

Question

I would like to reduce My Bitmap image size to maximum of 640px. For example I have Bitmap image of size 1200 x 1200 px .. How can I reduce it to 640px.

Answer 1

If you pass bitmap width and height then use:

public Bitmap getResizedBitmap(Bitmap image, int bitmapWidth, int bitmapHeight) {
    return Bitmap.createScaledBitmap(image, bitmapWidth, bitmapHeight, true);
}

If you want to keep the bitmap ratio the same, but reduce it to a maximum side length, use:

public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
        int width = image.getWidth();
        int height = image.getHeight();

        float bitmapRatio = (float) width / (float) height;
        if (bitmapRatio > 1) {
            width = maxSize;
            height = (int) (width / bitmapRatio);
        } else {
            height = maxSize;
            width = (int) (height * bitmapRatio);
        }

        return Bitmap.createScaledBitmap(image, width, height, true);
}