Change the width of all the ActionBar Tabs

MainActivity.java

    private boolean changeTabsWidth(Object root) {
        // Found the container, that holds the Tabs. This is the ScrollContainerView to be specific,
        // but checking against that class is not possible, since it's part of the hidden API.
        // We will check, if root is an instance of HorizontalScrollView instead,
        // since ScrollContainerView extends HorizontalScrollView.
        if (root instanceof HorizontalScrollView) {
            // The Tabs are all wraped in a LinearLayout
            root = ((ViewGroup) root).getChildAt(0);
            if (root instanceof LinearLayout) {
                // Found the Tabs. Now we can set a custom Font to all of them.
                for (int i = 0; i < ((ViewGroup) root).getChildCount(); i++) {
                    final LinearLayout child = ((LinearLayout) ((ViewGroup) root).getChildAt(i));

                    ViewTreeObserver viewTreeObserver = child.getViewTreeObserver();
                    if (viewTreeObserver != null) {
                        viewTreeObserver
                                .addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                                    @Override
                                    public void onGlobalLayout() {
                                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
                                            child.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                                        } else {

                                            child.getViewTreeObserver() .removeGlobalOnLayoutListener(this);
                                        }

                                        int width = child.getMeasuredWidth();
                                        int height = child.getMeasuredHeight();
                                        // screen dimenssion
                                        Display display = getWindowManager().getDefaultDisplay();
                                        Point size = new Point();
                                        size.set(display.getWidth(),display.getHeight());
                                        //display.getSize(size);
                                        int widthScreen = size.x;
                                        int heightScreen = size.y;

                                        LinearLayout.LayoutParams parms = new
                                                LinearLayout.LayoutParams(widthScreen/5, height);
                                        child.setLayoutParams(parms);
                                    }
                                });
                    }
                }
                return true;
            }

        }
        // Search ActionBar and the Tabs. Exclude the content of the app from this search.
        else if (root instanceof ViewGroup) {
            ViewGroup group = (ViewGroup) root;
            if (group.getId() != android.R.id.content) {
                // Found a container that isn't the container holding our screen layout.
                // The Tabs have to be in here.
                for (int i = 0; i < group.getChildCount(); i++) {
                    if (changeTabsWidth(group.getChildAt(i))) {
                        // Found and done searching the View tree
                        return true;
                    }
                }
            }
        }
        // Found nothing
        return false;
    }