refreshByNewDisplayedValues的问题

[729286938]

我用这个库做省市区三级联动时遇到的问题，有的省份或者城市下没有区，通过refreshByNewDisplayedValues方法设置一个空的String数组，然后就会抛异常，能否处理这样的问题呢？
java.lang.IllegalArgumentException: mMaxValue - mMinValue + 1 should not be greater than mDisplayedValues.length, now ((mMaxValue - mMinValue + 1) is 1 newDisplayedValues.length is 0, you need to set MaxValue and MinValue before setDisplayedValues(String[])
at cn.carbswang.android.numberpickerview.library.NumberPickerView.setDisplayedValues(NumberPickerView.java:505)
at cn.microants.merchants.app.store.fragment.CityPickerDialog.refreshByNewDisplayedValues(CityPickerDialog.java:173)
at cn.microants.merchants.app.store.fragment.CityPickerDialog.updateCities(CityPickerDialog.java:134)
at cn.microants.merchants.app.store.fragment.CityPickerDialog.onValueChange(CityPickerDialog.java:120)
at cn.carbswang.android.numberpickerview.library.NumberPickerView.respondPickedValueChanged(NumberPickerView.java:627)
at cn.carbswang.android.numberpickerview.library.NumberPickerView.access$1200(NumberPickerView.java:24)
at cn.carbswang.android.numberpickerview.library.NumberPickerView$1.handleMessage(NumberPickerView.java:362)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.os.HandlerThread.run(HandlerThread.java:61)