无法解析符号setMinValue

Question

I am trying to use a NumberPicker in Android Studio. Yet when I try to use setMinValue(), it gives me an error saying "Cannot resolve symbol setMinValue." According to ( https://developer.android.com/reference/android/widget/NumberPicker.html ), setMinValue() is a valid function for NumberPicker. I have tried Build -> Clean Project and that did not work either. Please help me!

My code is:

NumberPicker picker = (NumberPicker) findViewByID (R.id.LanguagePicker); String[] things = new String[] ("this", "that"); picker.setMinValue(0);

Answer 1

It should work.

I used this way once to make time picker

NumberPicker myTimeHour = (NumberPicker) myView.findViewById(R.id.time_hour);
NumberPicker myTimeMinutes = (NumberPicker) myView.findViewById(R.id.time_minutes);
myTimeMinutes.setMinValue(0);
myTimeMinutes.setMaxValue(getResources().getStringArray(R.array.minutes_item).length - 1);
myTimeMinutes.setDisplayedValues(getResources().getStringArray(R.array.minutes_item));
myTimeHour.setMinValue(0);
myTimeHour.setMaxValue(getResources().getStringArray(R.array.hour_item).length - 1);
myTimeHour.setDisplayedValues(getResources().getStringArray(R.array.hour_item));

For your situation, the code should be the following

NumberPicker picker = (NumberPicker) myView.findViewById(R.id.LanguagePicker);
myTimeMinutes.setMinValue(0);
myTimeMinutes.setMaxValue(1);
myTimeMinutes.setDisplayedValues(new String[]{"this", "that"});

The documentation show the following about max value: The length of the displayed values array set via setDisplayedValues(String[]) must be equal to the range of selectable numbers which is equal to getMaxValue() - getMinValue() + 1.

Please attach entire code and stack trace errors