Randomize images on imageview with "if" function working strange

im trying to randomize images when button clicked and if the image is what i want it to be, randomize again, but if its not, close the activity.

in my code i cant randomize, it closes always, but if i delete finish function, it will randomize normally.

i just want that imageview recognize the image without a sqlite DB

@Override
            public void onClick(View v) {
                int[] cards={R.drawable.bg,R.drawable.bg1};
                Random r = new Random();
                int n = r.nextInt(2);
                ImageView imgview1 = (ImageView) findViewById(R.id.imgv1);
                imgview1.setImageResource(cards[n]);

                if (imgview1.equals(R.drawable.bg){
                    imgview1.setImageResource(cards[n]);
                }
                else  {
                    finish();
                }
            }