android片段沒有附加到活動

Question

我正在嘗試使用getString作為我的viewpager選項卡標題，所以我可以支持多語言，但每次我使用getString我得到錯誤片段沒有附加到日志中的活動和應用程序強制關閉！

這是我的片段代碼

public class RecipesFragment extends Fragment {

ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence[] Titles = {(getResources().getString(R.string.invcraftingcardtitle)), (getResources().getString(R.string.wbcraftingcardtitle)), (getResources().getString(R.string.ovencraftingcardtitle)), (getResources().getString(R.string.painttitle))};
int Numboftabs = 4;

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.recipes_fragment, container, false);
    return v;


}


@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    // Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
    adapter = new ViewPagerAdapter(getActivity().getSupportFragmentManager(), Titles, Numboftabs);

    // Assigning ViewPager View and setting the adapter
    pager = (ViewPager) getView().findViewById(R.id.pager);
    pager.setAdapter(adapter);

    // Assiging the Sliding Tab Layout View
    tabs = (SlidingTabLayout) getView().findViewById(R.id.tabs);
    tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width

    // Setting Custom Color for the Scroll bar indicator of the Tab View
    tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
        @Override
        public int getIndicatorColor(int position) {
            return getResources().getColor(R.color.tabsScrollColor);
        }
    });

    // Setting the ViewPager For the SlidingTabsLayout
    tabs.setViewPager(pager);


}

}

Answer 1

這是因為在onAttach之后可以使用變量Titles作為getResources

嘗試在onAttach方法中初始化它，如下所示：

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    Titles = {(getResources().getString(R.string.invcraftingcardtitle)), (getResources().getString(R.string.wbcraftingcardtitle)), (getResources().getString(R.string.ovencraftingcardtitle)), (getResources().getString(R.string.painttitle))};
}

Answer 2

問題是getResources()實際上調用了getActivity().getResources()並且您在變量啟動中使用它（在附加到活動之前）。 嘗試在需要使用之前設置titles變量。

我也避免讓變量以大寫字母開頭，因為這使它們看起來好像是類。