@Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); activityHelper.onCreate(this, savedInstanceState); final Bundle bundle; final Intent intent = getIntent(); if (intent != null) { bundle = intent.getExtras(); } else { bundle = null; } final CalculatorFragmentType fragmentType = CalculatorFragmentType.functions; for (FunctionCategory category : FunctionCategory.getCategoriesByTabOrder()) { final AndroidFunctionCategory androidCategory = AndroidFunctionCategory.valueOf(category); if (androidCategory != null) { final Bundle fragmentParameters; if (category == FunctionCategory.my && bundle != null) { AbstractMathEntityListFragment.putCategory(bundle, category.name()); fragmentParameters = bundle; } else { fragmentParameters = AbstractMathEntityListFragment.createBundleFor(category.name()); } activityHelper.addTab( this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), fragmentParameters, androidCategory.getCaptionId(), R.id.main_layout); } else { Log.e( CalculatorFunctionsActivity.class.getSimpleName(), "Unable to find android function category for " + category); } } }