CesarG's questions

I want to load an image to a tag imgfrom a css file

The following code is from my HTML

<img class="logo-header" alt="tienda online"/>

and then the css

img.logo-header{background: url("../img/centro.jpg");}

my file folders are structured like this

I can't get the image to load, I don't know if I'm doing something wrong or if I should upload the page to a hostinger and place the image in this way

img.logo-header{background: url("https://www.test.com/img/centro.jpg");}

There are more rules in my CSS file, it is ruled out that it is not connected correctly to the style sheet.

When I generate the apk with cordova

I add the android platform

cordova platform add android

then i build the app

cordova build android

The application is generated.

But how do I know what api is taking from the sdk (if I install several in my sdk). ?

I am making a database in MySQL with MySQL Worbench and I am wondering how it can help me in my database.

What is the default/expression field used for when creating a table?

When I installed XAMPP, mariaDB appeared in phpMyAdmin in the Server type section

and when I tried to access cmd to make a database in MySQL from the console, mariaDB also appeared

I added one LinearLayoutby one ConstraintLayoutand I get the following errors:

I would like to know if I added it wrong or if it is not possible.