android wheelview实现三级城市选择

很早之前看淘宝就有了ios那种的城市选择控件，当时也看到网友有分享，不过那个写的很烂，后来（大概是去年吧），我们公司有这么一个项目，当时用的还是网上比较流行的那个黑框的那个，感觉特别的丑，然后我在那个开源的wheelview的基础上做封装，用户只需要专心数据的组装即可，然后填充就行，其他的可以不必考虑。

先上下效果图

接下来说下我的思路：网络请求-数据返回-设置数据-数据填充控件

接下来直接按上面的流程直接上代码：

网络请求我用的本地的json数据

 String address = Utils.readAssert(this, "address.txt");        AddressModel model = JsonUtil.parseJson(address, AddressModel.class);

然后我们将本地的数据通过InputStream转换为String，并用过Gson将String映射到Model对象中

<span style="font-size:18px;"> public static String readAssert(Context context,  String fileName){        String jsonString="";        String resultString="";        try {            InputStream inputStream=context.getResources().getAssets().open(fileName);            byte[] buffer=new byte[inputStream.available()];            inputStream.read(buffer);            resultString=new String(buffer,"utf-8");        } catch (Exception e) {            e.printStackTrace();        }        return resultString;    }</span>

接下来我们写自定义的Popwindos实现选择城市的弹框

<span style="font-size:18px;">public class ChooseAddressWheel implements MyOnWheelChangedListener {    @Bind(R.id.province_wheel)    MyWheelView provinceWheel;    @Bind(R.id.city_wheel)    MyWheelView cityWheel;    @Bind(R.id.district_wheel)    MyWheelView districtWheel;    private Activity context;    private View parentView;    private PopupWindow popupWindow = null;    private WindowManager.LayoutParams layoutParams = null;    private LayoutInflater layoutInflater = null;    private List<AddressDtailsEntity.ProvinceEntity> province = null;    private OnAddressChangeListener onAddressChangeListener = null;    public ChooseAddressWheel(Activity context) {        this.context = context;        init();    }    private void init() {        layoutParams = context.getWindow().getAttributes();        layoutInflater = context.getLayoutInflater();        initView();        initPopupWindow();    }    private void initView() {        parentView = layoutInflater.inflate(R.layout.choose_city_layout, null);        ButterKnife.bind(this, parentView);        provinceWheel.setVisibleItems(7);        cityWheel.setVisibleItems(7);        districtWheel.setVisibleItems(7);        provinceWheel.addChangingListener(this);        cityWheel.addChangingListener(this);        districtWheel.addChangingListener(this);    }    private void initPopupWindow() {        popupWindow = new PopupWindow(parentView, WindowManager.LayoutParams.MATCH_PARENT, (int) (Utils.getScreenHeight(context) * (2.0 / 5)));        popupWindow.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);        popupWindow.setAnimationStyle(R.style.anim_push_bottom);        popupWindow.setBackgroundDrawable(new BitmapDrawable());        popupWindow.setOutsideTouchable(false);        popupWindow.setFocusable(true);        popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {            public void onDismiss() {                layoutParams.alpha = 1.0f;                context.getWindow().setAttributes(layoutParams);                popupWindow.dismiss();            }        });    }    private void bindData() {        provinceWheel.setViewAdapter(new ProvinceWheelAdapter(context, province));        updateCitiy();        updateDistrict();    }    @Override    public void onChanged(MyWheelView wheel, int oldValue, int newValue) {        if (wheel == provinceWheel) {            updateCitiy();//省份改变后城市和地区联动        } else if (wheel == cityWheel) {            updateDistrict();//城市改变后地区联动        } else if (wheel == districtWheel) {        }    }    private void updateCitiy() {        int index = provinceWheel.getCurrentItem();        List<AddressDtailsEntity.ProvinceEntity.CityEntity> citys = province.get(index).City;        if (citys != null && citys.size() > 0) {            cityWheel.setViewAdapter(new CityWheelAdapter(context, citys));            cityWheel.setCurrentItem(0);            updateDistrict();        }    }    private void updateDistrict() {        int provinceIndex = provinceWheel.getCurrentItem();        List<ProvinceEntity.CityEntity> citys = province.get(provinceIndex).City;        int cityIndex = cityWheel.getCurrentItem();        List<ProvinceEntity.AreaEntity> districts = citys.get(cityIndex).Area;        if (districts != null && districts.size() > 0) {            districtWheel.setViewAdapter(new AreaWheelAdapter(context, districts));            districtWheel.setCurrentItem(0);        }    }    public void show(View v) {        layoutParams.alpha = 0.6f;        context.getWindow().setAttributes(layoutParams);        popupWindow.showAtLocation(v, Gravity.BOTTOM, 0, 0);    }    public void setProvince(List<ProvinceEntity> province) {        this.province = province;        bindData();    }    public void defaultValue(String provinceStr, String city, String arae) {        if (TextUtils.isEmpty(provinceStr)) return;        for (int i = 0; i < province.size(); i++) {            ProvinceEntity provinces = province.get(i);            if (provinces != null && provinces.Name.equalsIgnoreCase(provinceStr)) {                provinceWheel.setCurrentItem(i);                if (TextUtils.isEmpty(city)) return;                List<ProvinceEntity.CityEntity> citys = provinces.City;                for (int j = 0; j < citys.size(); j++) {                    ProvinceEntity.CityEntity cityEntity = citys.get(j);                    if (cityEntity != null && cityEntity.Name.equalsIgnoreCase(city)) {                        cityWheel.setViewAdapter(new CityWheelAdapter(context, citys));                        cityWheel.setCurrentItem(j);                        if (TextUtils.isEmpty(arae)) return;                        List<ProvinceEntity.AreaEntity> areas = cityEntity.Area;                        for (int k = 0; k < areas.size(); k++) {                            ProvinceEntity.AreaEntity areaEntity = areas.get(k);                            if (areaEntity != null && areaEntity.Name.equalsIgnoreCase(arae)) {                                districtWheel.setViewAdapter(new AreaWheelAdapter(context, areas));                                districtWheel.setCurrentItem(k);                            }                        }                    }                }            }        }    }    @OnClick(R.id.confirm_button)    public void confirm() {        if (onAddressChangeListener != null) {            int provinceIndex = provinceWheel.getCurrentItem();            int cityIndex = cityWheel.getCurrentItem();            int areaIndex = districtWheel.getCurrentItem();            String provinceName = null, cityName = null, areaName = null;            List<ProvinceEntity.CityEntity> citys = null;            if (province != null && province.size() > provinceIndex) {                ProvinceEntity provinceEntity = province.get(provinceIndex);                citys = provinceEntity.City;                provinceName = provinceEntity.Name;            }            List<ProvinceEntity.AreaEntity> districts = null;            if (citys != null && citys.size() > cityIndex) {                ProvinceEntity.CityEntity cityEntity = citys.get(cityIndex);                districts = cityEntity.Area;                cityName = cityEntity.Name;            }            if (districts != null && districts.size() > areaIndex) {                ProvinceEntity.AreaEntity areaEntity = districts.get(areaIndex);                areaName = areaEntity.Name;            }            onAddressChangeListener.onAddressChange(provinceName, cityName, areaName);        }        cancel();    }    @OnClick(R.id.cancel_button)    public void cancel() {        popupWindow.dismiss();    }    public void setOnAddressChangeListener(OnAddressChangeListener onAddressChangeListener) {        this.onAddressChangeListener = onAddressChangeListener;    }</span>

然后通过三个Adapter去设置值，这里展示一个

<span style="font-size:18px;">public class ProvinceWheelAdapter extends BaseWheelAdapter<AddressDtailsEntity.ProvinceEntity> {public ProvinceWheelAdapter(Context context, List<AddressDtailsEntity.ProvinceEntity> list) {super(context,list);}@Overrideprotected CharSequence getItemText(int index) {AddressDtailsEntity.ProvinceEntity data = getItemData(index);if(data != null){return data.Name;}return null;}}</span>

那么在我们的页面中我们怎么用呢？

我们先初始化：

<span style="font-size:18px;">private void init() {        initWheel();        initData();    }</span>

 <span style="font-size:18px;">private void initWheel() {        chooseAddressWheel = new ChooseAddressWheel(this);        chooseAddressWheel.setOnAddressChangeListener(this);    }</span>

接下来设置值了

<span style="font-size:18px;">private void initData() {        String address = Utils.readAssert(this, "address.txt");        AddressModel model = JsonUtil.parseJson(address, AddressModel.class);        if (model != null) {            AddressDtailsEntity data = model.Result;            if (data == null) return;            chooseAddress.setText(data.Province + " " + data.City + " " + data.Area);            if (data.ProvinceItems != null && data.ProvinceItems.Province != null) {                chooseAddressWheel.setProvince(data.ProvinceItems.Province);                chooseAddressWheel.defaultValue(data.Province, data.City, data.Area);            }        }    }</span>

好了，就写到这里了，有需要的请加我们的群：278792776或者188716429
最后附上代码下载地址：
https://github.com/xiangzhihong/wheelview-master