getRootView() not working

Question

This is my xml file:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/background"
android:orientation="vertical"
android:padding="15dip" >

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
</ListView>

Now in my code I would like to change the window's background color, and I'm doing it like this:

ListView listview = (ListView) findViewById(android.R.id.list);
View root = listview.getRootView();
root.setBackgroundColor(Color.parseColor("#bdbdbd"));

If I understood this correctly, this should change the background color of the listview's parent (in this case, the LinearLayout). However this is not working, what am I doing wrong?

What do you mean but "it is not working"? Does it throw an exception? If yes, what exception do you get? — Piotr Chojnacki, Jan 10 '13 at 14:44
It means that nothing happens, no exceptions are thrown and the background color is not changed — user1301428, Jan 10 '13 at 15:08

score 3 · Accepted Answer · edited May 23 '17 at 12:26

3

I think you're confused, getRootView() won't get you that LinearLayout, but the parent of that view. See this other question. You should use listview.getParent() instead; note that it needs to be casted.

edited May 23 '17 at 12:26

Community

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answered Jan 10 '13 at 14:47

dmon

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score 1 · Answer 2 · answered Jan 10 '13 at 14:47

1

try to use getParent() in place of getRootView() to get the instance of the surrounding LinearLayout..

answered Jan 10 '13 at 14:47

Praful Bhatnagar

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getRootView() not working

2 Answers2