Do I need to add all ads to the.xml string?

Question

I already know that I should create a block for every actvity of my application that I want to display ads, but I don’t know how do I modify the string.xml (if any) after the first ad block has been added:

string.xml (source of the code)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">My Application</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
</resources>

I wonder if I have to add the other ad blocks to the string.xml, but without necessarily changing the name to differentiate one from the other:

string.xml (withdrawn from here and modified by me).

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">My Application</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
    <string name="banner_ad_unit_id">ca-app-pub-1239402565465465/2363007813</string>
</resources>

Or if I have to change my name:

string.xml (withdrawn from here and modified by me).

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">My Application</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
    <string name="banner_ad_unit_id_02">ca-app-pub-1239402565465465/2363007813</string>
</resources>

Links that may be useful:

https://firebase.google.com/docs/admob/android/quick-start?hl=pt-br

https://developers.google.com/admob/android/targeting?hl=pt-br#test_ads /

https://developers.google.com/admob/android/test-ads?hl=pt-br

Answer 1

Each ad has its own id, so.xml strings have to have items with different names to represent each id (because it’s not even possible to have any 2 items in XML with the same name).

On the other hand, you can reuse the same ad across multiple app locations. You don’t need, for example, to create 2 banners with different id’s just to display in different activities. You can use the same banner.