android NumberPicker 數組越界的坑

標籤：

被這個問題耽誤了一個多小時。。。

直接上解決方案，參考紅色部分。

private void initViews() {        wheel = (NumberPicker) findViewById(R.id.info_wheel_province);        wheelCity = (NumberPicker) findViewById(R.id.info_wheel_city);        wheelCity.setWrapSelectorWheel(false);        //讀取地址資訊json        final List<CityBean> cityBeans = ResUtils.initCityList(this);        final String[] pros = new String[cityBeans.size()];        for (int i = 0; i < pros.length; i++) {            pros[i] = cityBeans.get(i).getProvince();        }//        wheel.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);//        wheelCity.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);        wheel.setMaxValue(pros.length - 1);        wheel.setMinValue(0);        wheel.setWrapSelectorWheel(false);        wheel.setDisplayedValues(pros);        wheel.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {            @Override            public void onValueChange(NumberPicker picker, int oldVal, final int newVal) {                String citys = cityBeans.get(newVal).getCitys();                final String[] split = citys.split(",");                wheelCity.setMinValue(0);                wheelCity.setValue(0);                if (split.length - 1 > wheelCity.getMaxValue()) {                    wheelCity.setDisplayedValues(split);                    wheelCity.setMaxValue(split.length - 1);                } else {                    wheelCity.setMaxValue(split.length - 1);                    wheelCity.setDisplayedValues(split);                }                wheelCity.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {                    @Override                    public void onValueChange(NumberPicker picker2, int oldVal2, int newVal2) {                        Toast.makeText(InfoActivity.this, pros[newVal] + " " + split[newVal2], Toast.LENGTH_LONG).show();                    }                });            }        });    }

有興趣的可以研究一下源碼找下原因。

android NumberPicker 數組越界的坑