CODEWITHSUNDEEP
androidinternationalizationtranslationplural
Andreas Gohr
Andreas Gohr

Reputation: 4935

Android Plural Strings with multiple Parameters

In Android strings, you can define plurals to handle translations depending on the actual number supplied to the string as described here. Strings also allow for specifying multiple positional parameters similar to what sprintf does in many languages.

However, consider the following string:

<resources>
    <string name="remaining">%1$d hours and %2$d minutes remaining.</string>
</resources>

It contains two numbers, how would I transform this to a plural in Android? All examples always work with a single parameter only. Is this even possible?

Upvotes: 19

Views: 12318

Answers (3)

akshay bhange
akshay bhange

Reputation: 2504

strings.xml

<plurals name="lbl_items_selected">
    <item quantity="one">%d item out of %d items Selected</item>
    <item quantity="other">%d items out of %d items Selected</item>
</plurals>

Kotlin File

resources.getQuantityString(
    R.plurals.lbl_items_selected, //plural from strings.xml file
    size, //quantity 
    size, //var arg - first parameter
    allItemCount //var arg - second parameter
)

this will return :

if size = 1 : 1 item out of 10(allItemCount) items selected

if size = 2 (or more) : 2(given size) items out of 10(allItemCount) items selected

Upvotes: 3

Blackbelt
Blackbelt

Reputation: 157437

getQuantityString has an overloaded version that takes a String id, the quantity and a varargs of object that you could use to format your string. Even though seems possible to use plural, it sounds strange to me for time. You could use the helper methods contained in DateUtil, which are already localized and take care of singular/plural and then complete your string with the results of these helper methods. E.g. getRelativeTimeSpanString

<plurals name="number_of_emails">
    <item quantity="one">%d email</item>
    <item quantity="other">%d emails</item>
</plurals>

<plurals name="number_of_messages">
    <item quantity="one">%d message</item>
    <item quantity="other">%d messages</item>
</plurals>

and then you can use getQuantityString to retrieve the two pieces and combine it in one.

Upvotes: 7

jj2005
jj2005

Reputation: 143

Previous answer uses string concatenation which is incorrect from an i18n point of view. For the original string "%1$d hours and %2$d minutes remaining." using string concatenation would force the translation of "remaining" to the end which mightn't be appropriate for some languages.

My solution would be:

<resources>
     <string name="remaining">Time remaining: Hours:%1$d Minutes:%2$d.</string>
</resources>

Or perhaps with "Time remaining" as the heading.

This solution is mentioned in http://developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling

It's often possible to avoid quantity strings by using quantity-neutral formulations such as "Books: 1"

Upvotes: 8

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