CODEWITHSUNDEEP
androidstring
NullPointerException
NullPointerException

Reputation: 37731

Problems accessing my strings.xml items… i got numbers and not the string value

i found this problem some time ago, but i solve it using this: getString(), or this: getResources().getString()

but now, for this case, it doesn't works, i think it's because i need to get the string values on a NON ANDROID ACTIVITY CLASS. I need the resource values on a remote connection class, that doesn't extends any kind of activity or service.

how i can acces to the variables from my strings.xml on this normal class?

this is the code where i get the error (it gets an integer, and not the string value)

String a =R.string.totalpermission;

Upvotes: 1

Views: 3814

Answers (3)

Loïc Faure-Lacroix
Loïc Faure-Lacroix

Reputation: 13610

I'll add something to existing answers since I found it very useful.

To get your strings you have to use a Context. Your activity will work just great.

String string = getString(R.string.myString);

But if you have something more complex... for exemple

R.string.result -> "You %1$s %2$d cats"

String result = getString(R.string.result, killed ? "killed": "saved", count);

That would give you a result like that: You saved 10 cats or You killed 2 cats... and so on. You can pass parameters and positional arguments in strings will get replaced by your arguments in getString.

Upvotes: 3

EboMike
EboMike

Reputation: 77762

All Android resources are referenced via a resource ID, like R.string.totalpermission. You can see those numbers in R.java (although there's no reason to ever do that).

In cases of strings, you can easily get those using Context.getString. Bonus: You can even pass optional arguments and add dynamic strings that way. You always have a context - how are you getting called? If you really don't have a context, you can create one for the package your resources are in.

Upvotes: 1

Cristian
Cristian

Reputation: 200170

Take a look at these two answers (are the same XD):

Just an advice: try to read some basic concepts... it seems you don't understand what the R class is and how to use it. Trust me, you waste less time studying than trying to figure out how things work.

Upvotes: 4

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