试图在片段中显示textview

Question

yes I know it has been asked but mine is always null I tried all ways plz help, the error massage: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference

public class InfoFragment extends Fragment {

    private TextView tvInfo;

    public  InfoFragment(){};
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View rootView = inflater.inflate(R.layout.main_fragment, container, false);

        tvInfo = rootView.findViewById(R.id.tv_info);
        tvInfo.setText("hello");

        return rootView;
    }
}

xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

        <TextView
            android:id="@+id/tv_info"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />

</RelativeLayout>

Answer 1

The code you showed is correct. It should be doing it right 100%. But, maybe you are inflating different layout and that's why TextView is null