好的,这个:
fun Context.quantityFromRes(id_: Int, qtt:Int, vararg format: Any) = resources.getQuantityString(id_, qtt, format)
的xml:
<plurals name="header_view">
<item quantity="one">Oh no! You just lost %1$d Point</item>
<item quantity="other">Oh no! You just lost %1$d Points</item>
</plurals>
给出了这个错误:
"java.util.IllegalFormatConversionException: %d can't format [Ljava.lang.Object; arguments"
表观Java修复:
public class XmlPluralFormatter {
private XmlPluralFormatter() {
throw new IllegalStateException("You can't fuck me =(");
}
public static String getFormattedString(Context context, int stringRes, int qtt, Object... formatArgs){
return context.getResources().getQuantityString(stringRes,qtt, formatArgs);
}
public static String getFormattedString(Context context, int stringRes, int qtt){
return context.getResources().getQuantityString(stringRes,qtt);
}
}
PS:忘了电话:
val qtt: Int = 123
context.quantityFromRes(R.plurals.header, qty)
我也可以这样做:
fun Context.quantityFromRes(id_: Int, qtt:Int, vararg format: Object) = resources.getQuantityString(id_, qtt, format)
但是
Required Object, found Int
我也可以演员:
context.quantityFromRes(R.plurals.header, qty, qt as Object)
但也给出了:
"java.util.IllegalFormatConversionException: %d can't format [Ljava.lang.Object; arguments"
此外,在没有扩展功能的情况下直接使用代码可以起作用:
context.resources.getQuantityString(R.plurals.header, qtt, qtt)
答案 0 :(得分:13)
问题是您将format
参数作为单个参数传递,而不是将其传播到Object... args
。扩展方法:
fun Context.quantityFromRes(id_: Int, qtt:Int, vararg format: Any) = resources.getQuantityString(id_, qtt, format)
相当于:
fun Context.quantityFromRes(id_: Int, qtt: Int, vararg format: Any): String? {
val args: Array<out Any> = format
return resources.getQuantityString(id_, qtt, args)
}
用Java术语表示:
public static final String quantityFromRes(Context $receiver, int id_, int qtt, Object... format) {
return $receiver.getResources().getQuantityString(id_, qtt, new Object[]{format});
}
您要做的是使用spread operator:
fun Context.quantityFromRes(id_: Int, qtt: Int, vararg format: Any): String? {
return resources.getQuantityString(id_, qtt, *format)
}