RelativeLayout.setVisibility(int) throws null point exception in android

Question

When I am trying to hide RelativeLayout in my Fragment I get an Exception that RelativeLayout.setVisibility throws null point Exception. Here is my Fragment code:

public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.product_description_zoom_image,container,false);
    layout = view.findViewById(R.id.layout_fix);
    layout.setVisibility(View.GONE);
    return view;
}

and

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:id="@+id/layout_fix">
    <Button
        android:layout_width="190dp"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@drawable/border"
        android:id="@+id/btnFavourite"
        android:text="@string/add_to_favourite"
        android:drawableLeft="@drawable/ic_favorite_border_black_24dp"/>

Code of product_description_zoom_image.xml? Does it same what you added in question? — Pankaj Kumar, Aug 09 '18 at 12:28
Maybe your reference of layout is not right please check it again. — Divyank Vijayvergiya, Aug 09 '18 at 12:29
move layout.setVisibility(View.GONE); this line to onviewcreated method — yogesh lokhande, Aug 09 '18 at 12:31
Lot of guessing in the answers. The only reason why your `RelativeLayout` with the id `layout_fix` is `null` is if it's not available the layout file of your Fragment. On a side-note, if you'd use `DataBinding` you wouldn't get this issue, as you can't access items that are not available in the layout. — Darwind, Aug 09 '18 at 12:41
Possible duplicate of [What is a NullPointerException, and how do I fix it?](https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — ADM, Aug 09 '18 at 12:45
Add your error log will help others to find what was the exact issue? — Mohamed Mohaideen AH, Aug 09 '18 at 12:49

Sandeep Parish · Answer 1 · 2018-08-09T13:08:58.650

0

Its seems like Android Studio cannot handle too many nested layouts. So please remove the parent RelativeLayout,and create a new Relative as child of parent layout and put everything in the new Relative layout. That solved it.

or

product_description_zoom_image layout has not any layout with id layout_fix

and your question in comment

Put this code in fragment in which you want to hide toolbar...

 @Override
public void onResume() {
    super.onResume();
    ((AppCompatActivity)getActivity()).getSupportActionBar().hide();
}
@Override
public void onStop() {
    super.onStop();
    ((AppCompatActivity)getActivity()).getSupportActionBar().show();
}

edited Aug 09 '18 at 13:08

answered Aug 09 '18 at 12:37

Sandeep Parish

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How is this different from OP's code? The only difference is that you've removed some annotations that is only used by Lint, hence it's not used in any way on runtime. – Darwind Aug 09 '18 at 12:38
check your layout file is contains same layout with id `layout_fix` – Sandeep Parish Aug 09 '18 at 12:39
What are you talking about? Your answer is wrong and the single line of description you added should've been a comment to OP's question, not an answer as you're basically just guessing that this might be the issue. – Darwind Aug 09 '18 at 12:42
Check i updated my answer and it will fix your issue @Darwind – Sandeep Parish Aug 09 '18 at 12:43
It's not my issue, I'm just commenting on the question and answers. – Darwind Aug 09 '18 at 12:53
yes. solved it. and also how can i hide toolbar in fragment – ansar abbas Aug 09 '18 at 13:06

score 0 · Answer 2 · answered Aug 09 '18 at 12:55

Try this code..

public class HomeFragment extends Fragment {
RelativeLayout layout;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    View view=inflater.inflate(R.layout.home_fragment,container,false);
    initView(view);
    return view;

}

private void initView(View view) {
    layout=view.findViewById(R.id.layout_fix);
    layout.setVisibility(View.GONE);
}

}

xml code like..

<?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:id="@+id/layout_fix">

<Button
    android:layout_width="190dp"
    android:layout_height="50dp"
    android:text="Hellow"/>
</RelativeLayout>

RelativeLayout.setVisibility(int) throws null point exception in android

2 Answers2