How to pixelize a bitmap in android

I have been searching but i did not find a question about how to pixelize a bitmap in android

Example

Note that i dont mean blur

You could just try and resize that image to a smaller version (and then back up if you need it at the same size as the original for some reason)

{
    Bitmap original = ...;
    //Calculate proportional size, or make the method accept just a factor of scale.
    Bitmap small = getResigetResizedBitmap(original, smallWidth, smallHeight);
    Bitmap pixelated = getResigetResizedBitmap(small, normalWidth, normalHeight);
   //Recycle small, recycle original if no longer needed.
}

public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
    int width = bm.getWidth();
    int height = bm.getHeight();
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;
    // CREATE A MATRIX FOR THE MANIPULATION
    Matrix matrix = new Matrix();
    // RESIZE THE BIT MAP
    matrix.postScale(scaleWidth, scaleHeight);

    // "RECREATE" THE NEW BITMAP
    Bitmap resizedBitmap = Bitmap.createBitmap(
        bm, 0, 0, width, height, matrix, false);
    return resizedBitmap;
}

The code is from here