What will happen if used empty layout with background color in android?

Question

What will happen to the background color of Layout as below:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@color/colorPrimary"
>

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textStyle="bold"
    android:text="Button"
    android:textSize="20sp"
    android:visibility="gone"
    android:textColor="@android:color/white"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true"/>

Case 1 What will happen to background color of RelativeLayout if Button visibility set to "INVISIBLE"?

Case 2 What will happen to background color of RelativeLayout if Button visibility set to "GONE"?

Nothing will happen to background color of RelativeLayout if Button visibility set to invisible or gone. — Mayur Gangurde, Feb 06 '17 at 06:31
i came across this question in one of my interviews; the interviewer explained that the background color of RelativeLayout will not be displayed in case it does not have any child. — Pavan, Feb 06 '17 at 06:33
Thanks Guys. I tried it already. But i wanted to know if there is any catch in it which i am doing wrongly. — Pavan, Feb 06 '17 at 06:34

score 0 · Answer 1 · answered Feb 06 '17 at 06:33

0

Nothing. As you are changing the background color of Layout, and NOT the Button itself !!

answered Feb 06 '17 at 06:33

Sumit Jha

2,095
2
21
36

score 0 · Accepted Answer · edited May 23 '17 at 12:24

0

It does not effect on the relative layout.after the button invisible the button is gone but you still got the relative layout with same background. for more reference visit this link hope this help.:)

edited May 23 '17 at 12:24

Community

1
1

answered Feb 06 '17 at 06:35

Pratik Gondil

689
1
6
17

Thank you so much Pratik for the link. :) – Pavan Feb 06 '17 at 06:37
@Pavan no problem happy coding.:) – Pratik Gondil Feb 06 '17 at 06:39

What will happen if used empty layout with background color in android?

2 Answers2