@Override
    public void onClick(View v) {
        int viewId = v.getId();
        switch (viewId) {
            case R.id.start_custom_tab:
                openCustomTab();
                break;
            default:
                //Unknown View Clicked
        }
    }
Opens Chrome Custom Tabs with a customized UI.
demos/src/main/java/org/chromium/customtabsdemos/CustomUIActivity.java