UniversalStringResources-jetPackCompose

• Whenever possible, you should be using string resources to make sure your app can easily be translated to other languages. However to read a string resource, you need access to the context which you don't have in ViewModels. In this Repo I show you how you can solve this problem.

Preview

Create sealed class :

sealed class UiText {
    data class DynamicString(val value: String) : UiText()
    class StringResource(
        @StringRes val resId: Int,
        vararg val args: Any
    ) : UiText()

    @Composable
    fun asString(): String {
        return when (this) {
            is DynamicString -> value
            is StringResource -> stringResource(resId, *args)
        }
    }


    fun asString(context: Context): String {
        return when (this) {
            is DynamicString -> value
            is StringResource -> context.getString(resId, *args)
        }
    }

}

@StringRes
Denotes that an integer parameter, field or method return value is expected to be a String resource reference (e.g. android.R.string.ok).

In Validate Function :

  UiText.StringResource(resId = R.string.min_name_length_error, MIN_NAME_LENGTH)

In String Res :

<string name="min_name_length_error">The name must be at least %d characters long</string>