Android - method for animating ActionBarDrawerToggle between hamburger (drawer) and back arrow (home)

burgerArrowTransition.java

    android.support.v7.app.ActionBarDrawerToggle mDrawerToggle;
    android.support.v4.widget.DrawerLayout mDrawerLayout;

    public void burgerArrowTransition(final boolean burgerToArrow) {
        float start, end;

        mDrawerToggle.setDrawerIndicatorEnabled(true);

        if(burgerToArrow) {
            start = 0.0f;
            end = 1.0f;
        } else {
            start = 1.0f;
            end = 0.0f;
        }
        
        ValueAnimator anim = ValueAnimator.ofFloat(start, end);
        
        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator valueAnimator) {
                float slideOffset = (Float) valueAnimator.getAnimatedValue();
                mDrawerToggle.onDrawerSlide(mDrawerLayout, slideOffset);
            }
        });
        
        anim.setInterpolator(new DecelerateInterpolator());

        anim.setDuration(500);

        anim.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {

            }

            @Override
            public void onAnimationEnd(Animator animator) {
                if (burgerToArrow) {
                    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
                    getSupportActionBar().setHomeButtonEnabled(true);
                    mToggle.setDrawerIndicatorEnabled(false);
                }
            }

            @Override
            public void onAnimationCancel(Animator animator) {

            }

            @Override
            public void onAnimationRepeat(Animator animator) {

            }
        });

        anim.start();

    }