RelativeLayout doesn't have method: setBackground(int)

Question

I am changing a Relativelayout color in status bar notification with the following code

notificationLayout.setInt(R.id.notiMainRl,"setBackgroundColor",context.getColor(R.color.notification_bg));

but sometime my app crashing with following error

android.app.ActivityThread$H.handleMessage
android.app.RemoteServiceException - Bad notification posted from package com.app.myapp:
 Couldn't inflate
contentViewsandroid.widget.RemoteViews$ActionException:
view: android.widget.RelativeLayout doesn't have method:
setBackground(int)

full stack trace is

Fatal Exception: android.app.RemoteServiceException: Bad notification for startForeground
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1774)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loop(Looper.java:164)
       at android.app.ActivityThread.main(ActivityThread.java:6543)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:440)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:810)

the crash is not frequent it appears on very little amount of devices