我有一个带有“TimePreference”类的TimePickerDialog首选项，它扩展了DialogPreference:publicclassTimePreferenceextendsDialogPreference{...privateTimePickerpicker=null;...publicTimePreference(Contextctxt,AttributeSetattrs){super(ctxt,attrs);setPositiveButtonText(android.R.string.ok);setNegativeButtonText(android.R.st