Added write back fix while typing a new value
Updated code to match the code of Android 4.4.2_r1.
Removed two calls of String.toString()
I used for this patch this diff: http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android/4.4.2_r1/android/widget/NumberPicker.java/?v=diff&id2=4.2.2_r1