CODEWITHSUNDEEP
android
Golan Kiviti
Golan Kiviti

Reputation: 4245

Can I use the same id on different xmls?

I have about 20 different xml files, and all of them has a raitingBar on them, and I have only one Activity for all of them, so my question is , can I use the same id for all of the raitingBar on the xml files?

Upvotes: 1

Views: 299

Answers (1)

frogatto
frogatto

Reputation: 29285

Yes you can, In Android all specified XML IDs finally at build time will be some integers in R.id.* class.

For example suppose you create this XML item:

<TextView android:id="@+id/text"
    ... />

The statement android:id="@+id/text" tells Android that add a new (because of + sign) ID called text into the R.id class. For example it takes some iteger like 123.

At this point, you define another view in another XML file with the same ID :

<TextView android:id="@id/text"
    ... />

Now in your Java codes, for example you use layout_1.xml (the first one) and then making a call findViewById(R.id.text). Keep in mind that all R.id.* is type of Integers (those are not some strange objects !)

So this statement is interpreted as findViewById(123). If you remember you've used only layout_1.xml file and in this file only one view exists with the ID R.id.text = 123. So this call will target only one view at the layout_1.xml not all your views in another XML files. That's it :)

Note: Try avoiding use same ID in same XML file.

Upvotes: 3

Related Questions