Scale view to parent layout size

I am trying to scale a view to layout size by using object animator. The view is a LinearLayout. The view does stretch, but not till the screen size in both the directions (i.e X and Y).

Here is the code.

I feel that either the problem is with this:

1. The formula to calculate how much zoom must be done.

   zoomTillX = screen_width/zoomView_width;
   zoomTillY = screen_height/zoomView_height;
   

2. Or with the Animation property code that is done in a wrong way.

Please let me know how can I achieve a zoom in.

public class MainActivity extends AppCompatActivity {

    TextView tv;
    double screen_height;
    LinearLayout zoomView;
    double screen_width;
    double zoomTillX;
    double zoomTillY;
    double zoomView_width;
    double zoomView_height;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        tv = (TextView) findViewById(R.id.tv);
        zoomView = (LinearLayout) findViewById(R.id.zoomView);
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        screen_height = (double)dm.heightPixels;
        screen_width = (double)dm.widthPixels;
        zoomView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                zoomView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                zoomView_width = (double)zoomView.getMeasuredWidth();
                zoomView_height =  (double)zoomView.getMeasuredHeight();


            }
        });
        zoomView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


            final  Handler handler =  new Handler(Looper.getMainLooper());

                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {

                        if(zoomView_width > 0 && zoomView_height > 0)
                        {
                            zoomTillX = screen_width/zoomView_width;
                            zoomTillY = screen_height/zoomView_height;

                            Log.d("VIEW GET X IS ",String.valueOf(zoomView.getX()));
                            Log.d("VIEW GET Y IS ",String.valueOf(zoomView.getY()));

                            ObjectAnimator scaleDownX = ObjectAnimator.ofFloat(zoomView, "scaleX", (float)(zoomTillX));
                            ObjectAnimator scaleDownY = ObjectAnimator.ofFloat(zoomView, "scaleY",(float)(zoomTillY));

                            List<Animator> oaList = new ArrayList<Animator>();
                            oaList.add(scaleDownX);
                            oaList.add(scaleDownY);

                            AnimatorSet ani = new AnimatorSet();
                            ani.playTogether(oaList);
                            ani.setDuration(500);
                           ani.start();

                        }else{

                            handler.postDelayed(this,300);
                        }

                    }
                },500);

            }
        });

    }
}

This is how it looks finally.