get the coordinates from a random position and use them

My code should work something like this:

you see one dark button (clickable, [start_time]) and one grey button (not clickable, [buttongame1]). the buttongame1 predict, where start_time will move next. when you click start_time, start_time moves to x and y of buttongame1. At the same time, buttongame1 set it's position randomly new. now when you click start_time, start_time moves to the new x and y of buttongame1. At the same time, buttongame1 set it's position randomly new, and so on.

I've tried this, but the problem is, I can't get or use the x & y from the buttongame1

    public void onClick(View v) {

int x0;
    int y0;
    int x1;
    int y1;
    int x2;
    int y2;
    int x3;
    int y3;
    int x4;
    int y4;
    int x5;
    int y5;
    int x6;
    int y6;
         textview1 = (TextView) findViewById(R.id.over);


        Random r = new Random();
        RelativeLayout decorView = (RelativeLayout) buttongame1.getParent();

        int screenWidth = decorView.getWidth();
        int screenHeight = decorView.getHeight();






          i++;

          if(v == gameover){
              i--;
                btncounter.setText("GAME OVER");
                start_time.setVisibility(View.GONE);
                textview1.setVisibility(View.VISIBLE);
                Animation anim = new AlphaAnimation(0.0f, 1.0f);
                anim.setDuration(50); //You can manage the time of the blink with this parameter
                anim.setStartOffset(20);
                anim.setRepeatMode(Animation.REVERSE);
                anim.setRepeatCount(Animation.INFINITE);
                textview1.startAnimation(anim);
                Toast.makeText(this, "GAME OVER", Toast.LENGTH_SHORT).show();


                        finish();


                    }
          if (i == 0 ) {
                btncounter.setText("0");
                 buttongame1.setX(r.nextInt(screenHeight - buttongame1.getWidth()));
                 buttongame1.setY(r.nextInt(screenHeight - buttongame1.getHeight()));
                int x0 = (int) buttongame1.getX();
                int y0 = (int) buttongame1.getY();


            }
        if (i == 1 ) {
            btncounter.setText("1");
             startTime = System.currentTimeMillis();
             buttongame1.setX(r.nextInt(screenHeight - buttongame1.getWidth()));
             buttongame1.setY(r.nextInt(screenHeight - buttongame1.getHeight()));
            int x1 = (int) buttongame1.getX();
            int y1 = (int) buttongame1.getY();
            start_time.setX((x1));
            start_time.setY(y1);

.
.
.and so on