How to remove gray background image in android?

Question

Java

I set an image as a background:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/main_background" >

But for some reason, on some devices it does not display it as such, but returns a gray background. Why does this happen and how is it treated?
P. S I tried to change formats (jpg, png), but nothing changed.

Answer 1

Try to check by setting some color instead of drawable. Check the resources - maybe a different drawable is set for certain versions. In most cases, the system works correctly, and an oversight on the part of the developer)