I found the following attribute in one xml layout: Android:background=@null what is the meaning of @null? What is the difference between specifying background=@null and. Using @null as a contentdescription is a way of explicitly saying that this image is purely decorative. Simply ignoring the warning is not the correct solution. But here is an. I was checking list of available constraints in javax. validation package and i noticed that there is an annotation @null which force the field to be null. I do not understand what is point of addin. @empty basically means null, and leave it null instead of using default value. For example, some view s will set their own backgrounds if they get a null value from the xml.

Why do you want to set android:background=@null? If you don't want to apply background then no need to add this property, i think so. So to avoid creating a string i set it to null. Android:contentdescription=@null this seems to quiet down the complaints from lint. I'm a bit lost why i need to set a string reference to. This is not going to work when an empty string is passed. You have to set an initbinder of stringtrimmereditor in your controller to work in both cases when an empty string or null is. In this context app:tabtextcolor=@null. Whatever property we define or give is passed to the java class which uses to draw views accordingly. More info here so if we give a.

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