button with random images dont use present images but the next ones

i want that an image randomize if its the right image, if its not, finish the activity my code are working with next images, i mean, i dont know if its the right or wrong image for me to choose the option i want

ImageButton diferente = (ImageButton) findViewById(R.id.imgb2);
        diferente.setOnClickListener(new View.OnClickListener() {


            @Override
            public void onClick(View v) {
                int[] cards1 = {R.drawable.bg, R.drawable.bg1, R.drawable.a01,  R.drawable.a02};

                Random t = new Random();
                int m = t.nextInt(4);


                ImageView imgview2 = (ImageView) findViewById(R.id.imgv1);
                imgview2.setImageResource(cards1[m]);

                if ((cards1[m] == R.drawable.bg) || (cards1[m] == R.drawable.bg1)) {
                    imgview2.setImageResource(cards1[m]);
                } else {
                    finish();
                }
            }
        });

i just want to randomize the image if the image is on the "if" condition, not try to guess what image comes next