How to Set Polyline fit to screen

Map.java

  public void onMapReady(GoogleMap googleMap) {

        map.clear();
        map = googleMap;
      LatLng hcmus = new LatLng(Double.parseDouble(latitude1), Double.parseDouble(longitude1));
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(hcmus, 10));
        originMarkers.add(map.addMarker(new MarkerOptions()
                .title(mStudentObject.getAddress())
                .position(hcmus)));
        LatLng startMarker=new LatLng(Double.parseDouble(latitude1),Double.parseDouble(longitude1));
        LatLng endMarker=new LatLng(latitudeuser,longitudeuser);
        LatLngBounds.Builder builder = new LatLngBounds.Builder();
        builder.include(startMarker);
        builder.include(endMarker);
        LatLngBounds bounds = builder.build();
        int padding = 0; // padding around start and end marker
        CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
        googleMap.animateCamera(cu);
       
        googleMap.setTrafficEnabled(false);
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        googleMap.setMyLocationEnabled(true);
        map.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {
            @Override
            public View getInfoWindow(Marker marker) {
                Log.e("bhb",marker.getTitle());
                return null;
            }

            @Override
            public View getInfoContents(Marker marker) {
                return null;
            }
        });

    }