Android - 无法再次打开片段

Question

I'm opening a fragment and soon after closing it.

It opens and closes no problem the first time but the second time it tries to open it gives a NullPointerException .

To open the fragment with SomeFrag class that extends Fragment . To close it I call closeFrag() method.

public class SomeFrag extends Fragment {
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        mRootview = (ViewGroup) inflater.inflate(R.layout.somefrag, container, false); // line with error
        return mRootview;
    }

    public void closeFrag(){
        ((ViewGroup)mRootview.getParent()).removeView(mRootview);
    }
}

Why am I not able to open the fragment a second time?

Answer 1

例如，要删除片段，您应该使用事务

getSupportFragmentManager().beginTransaction().remove(fragmentInstance).commit();