Taking control of android's drawer toggle

Activity.java

// Where you setup the toolbar
        toolbarDelegate = new ToolbarCompatDelegate(toolbar);
        slider = new DrawerArrowDrawableToggle(toolbarDelegate.getActionBarThemedContext());


// DrawerLayout.DrawerListener implementation
    @Override public void onDrawerSlide(View drawerView, float slideOffset) {
          slider.setPosition(Math.min(1f, Math.max(0, slideOffset)));
    }

    @Override public void onDrawerOpened(View drawerView) {
            slider.setPosition(1);
            toolbarDelegate.setActionBarDescription(R.string.navigation_drawer_close);
    }

    @Override public void onDrawerClosed(View drawerView) {
            toolbarDelegate.setActionBarDescription(R.string.navigation_drawer_open);
            slider.setPosition(0);
    }

    @Override public void onDrawerStateChanged(int newState) { }
    
// Changing the slider to an arrow:
    slider.setPosition(1)
// Changing the slider to a burger:
    slider.setPosition(0)


// position property animator for the slider
    private Property<DrawerArrowDrawableToggle, Float> sliderPositionProperty = new Property<DrawerArrowDrawableToggle, Float>(Float.class, "") {
        @Override public Float get(DrawerArrowDrawableToggle object) {
            return object.getPosition();
        }

        @Override public void set(DrawerArrowDrawableToggle object, Float value) {
            object.setPosition(value);
        }
    };

// Animating the slider to an arrow:
        Animator animator = ObjectAnimator.ofFloat(slider, sliderPositionProperty, 0, 1);

        animator.addListener(new AnimatorListenerAdapter() {});
        animator.start();

DrawerArrowDrawableToggle.java

public class DrawerArrowDrawableToggle extends DrawerArrowDrawable {
    public DrawerArrowDrawableToggle(Context context) {
        super(context);
    }

    public void setPosition(float position) {
        if (position == 1f) {
            setVerticalMirror(true);
        } else if (position == 0f) {
            setVerticalMirror(false);
        }
        setProgress(position);
    }

    public float getPosition() {
        return getProgress();
    }
}

ToolbarCompatDelegate.java

public class ToolbarCompatDelegate implements ActionBarDrawerToggle.Delegate {
    final Toolbar toolbar;
    final Drawable defaultUpIndicator;
    final CharSequence defaultContentDescription;

    ToolbarCompatDelegate(Toolbar toolbar) {
        this.toolbar = toolbar;
        defaultUpIndicator = toolbar.getNavigationIcon();
        defaultContentDescription = toolbar.getNavigationContentDescription();
    }

    @Override
    public void setActionBarUpIndicator(Drawable upDrawable, @StringRes int contentDescRes) {
        toolbar.setNavigationIcon(upDrawable);
        setActionBarDescription(contentDescRes);
    }

    @Override
    public void setActionBarDescription(@StringRes int contentDescRes) {
        if (contentDescRes == 0) {
            toolbar.setNavigationContentDescription(defaultContentDescription);
        } else {
            toolbar.setNavigationContentDescription(contentDescRes);
        }
    }

    @Override
    public Drawable getThemeUpIndicator() {
        return defaultUpIndicator;
    }

    @Override
    public Context getActionBarThemedContext() {
        return toolbar.getContext();
    }

    @Override
    public boolean isNavigationVisible() {
        return true;
    }
}