Android活动未附加到Fragment

Question

        BattleFragment battleFragment;
    battleFragment = BattleFragment.newInstance("0");
    FragmentManager fm = getActivity().getSupportFragmentManager();

    fm.beginTransaction()
            .replace(R.id.fragmentContainer, battleFragment)
            .commit();    

以上代码是我用来创建新片段并显示它的代码。但是，当我在片段中并尝试获取活动时，它返回null。当我运行isAttached（）时，它返回false。有什么我忘记了吗？

Answer 1

尝试以下代码.. 并使用FrameLayout（fragmentContainer）来扩充您的片段

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fragmentContainer, new battleFragment());
ft.commit();

和

public class battleFragment extends Fragment
{
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.yourFragmentLayout,container, false);
            //Your operations inside Fragment
            return view;
}