Compatibility for Java library methods that require Android API level 9? -


some java library methods decimalformat.setroundingmode have @since 1.6 entry in documentation.

/** ...  * @since 1.6  */ public void setroundingmode(roundingmode roundingmode) { ... }

when tried use method compiled under android 4.2.2 , jdk 1.6 android:minsdkversion set 7 shown,

mynumberformat.setroundingmode(roundingmode.down);

android lint underlined setroundingmode in red me , told me that

call requires api level 9 (current min 7): java.text.numberformat#setroundingmode

how , why can android api restrict java library methods can , cannot use? cleaned project , lint error disappeared. project compiled no errors , ran on device running android 2.2.3 (api 8).
program crashed with:

05-09 11:32:38.436: e/androidruntime(2074): caused by: java.lang.nosuchmethoderror: java.text.numberformat.setroundingmode

the android documentation confirms setroundingmode, copysign, , others added in api level 9. does mean devices running android os level 8 , below compiled/built jdk 1.5?

and can understand that. but impossible android support library (or else) allow use these methods?

related rounding half decimal format in android


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