先来张效果图吧，
在网上也有很多demo，点击按钮，弹出对话框选择省市区，直接设置进去，类似ios的省市区三联动。但客户需要以上样式的，么得办法，只能一点点撸。
布局文件跳过，直接上代码
一、省市区json文件解析
省市区json文件，放在assets文件夹中，就不用从服务器拉取。
1、省市区json文件解析：
String json = getJson();
try {
if (json != null && json.length() > 0) {
getJsonData(json);
}
} catch (Exception e) {
e.printStackTrace();
}
/**
* 读取json数据源
*/
public String getJson() {
AssetManager assetManager = this.getAssets();
StringBuilder stringBuilder = new StringBuilder();
try {
BufferedReader bd = new BufferedReader(new InputStreamReader(assetManager.open("area.json")));
String line;
while ((line = bd.readLine()) != null) {
stringBuilder.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return stringBuilder.toString();
}
2、解析json文件
/**
* 解析储存数据
*/
private void getJsonData(String json) {
try {
JSONArray jsonArray = new JSONArray(json);
ProvinceArea provinceArea;
for (int i = 0; i < jsonArray.length(); i++) {
provinceArea = new ProvinceArea();
JSONObject js = (JSONObject) jsonArray.get(i);
String value = js.getString("value");
String text = js.getString("text");
JSONArray cityJson = js.getJSONArray("children");
cityData = new ArrayList<CityArea>();
CityArea cityArea;
for (int j = 0; j < cityJson.length(); j++) {
cityArea = new CityArea();
JSONObject cityJo = (JSONObject) cityJson.get(j);
String cityValue = cityJo.getString("value");
String cityName = cityJo.getString("text");
JSONArray countryArray = cityJo.getJSONArray("children");
countryData = new ArrayList<CountryArea>();
CountryArea countryArea;
for (int m = 0; m < countryArray.length(); m++) {
countryArea = new CountryArea();
JSONObject countryJo = (JSONObject) countryArray.get(m);
String countryValue = countryJo.getString("value");
String countryName = countryJo.getString("text");
countryArea.setName(countryName);
countryArea.setValue(countryValue);
countryData.add(countryArea);
}
cityArea.setCityName(cityName);
cityArea.setCityValue(cityValue);
cityArea.setCountryList(countryData);
cityData.add(cityArea);
}
provinceArea.setCityList(cityData);
provinceArea.setProvinceName(text);
provinceArea.setProvinceValue(value);
pData.add(provinceArea);
provinceCode.add(value);
provinceName.add(text);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
3、将数据分别存入对应的集合中，然后设置适配器
adapter01 = new ArrayAdapter<ProvinceArea>(this,android.R.layout.simple_spinner_dropdown_item, pData);
spinnerProvince.setAdapter(adapter01);
spinnerProvince.setSelection(0, true);
provence = pData.get(0); //默认选中第一项，防止在获取城市id时候为空（省市区默认都选择第一项，不点击spinner，选择城市下标时会出现nullpoint）
adapter02 = new ArrayAdapter<CityArea>(this,
android.R.layout.simple_spinner_dropdown_item, pData.get(0).getCityList());
spinnerCity.setAdapter(adapter02);
spinnerCity.setSelection(0, true);
city = pData.get(0).getCityList().get(0);//默认选中第一项，防止在获取城市id时候为空
adapter03 = new ArrayAdapter<CountryArea>(this,
android.R.layout.simple_spinner_dropdown_item, pData.get(0).getCityList().get(0).getCountryList());
spinnerArea.setAdapter(adapter03);
spinnerArea.setSelection(0, true);
country = pData.get(0).getCityList().get(0).getCountryList().get(0);//默认选中第一项，防止在获取城市id时候为空
spinnerProvince.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
//
// // 设置选中之后的字体和颜色
// if(view instanceof TextView){
// ((TextView)view).setTextColor(Color.RED);
// ((TextView)view).setTextSize(12f);
// }
adapter02 = new ArrayAdapter<CityArea>(RegisterActivity.this,
android.R.layout.simple_spinner_dropdown_item, pData.get(position).getCityList());
spinnerCity.setAdapter(adapter02);
provence = pData.get(position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {}
});
spinnerCity.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
adapter03 = new ArrayAdapter<CountryArea>(RegisterActivity.this,
android.R.layout.simple_spinner_dropdown_item, provence.getCityList().get(position).getCountryList());
spinnerArea.setAdapter(adapter03);
city = provence.getCityList().get(position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {}}
);
spinnerArea.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// country = provence.getCityList().get(position).getCountryList().get(position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {}
});
/*-------------------------------------------------省市区三联动 end------------------------------------------------------*/
4、然后选取spinner相应index对应省市区的编号返回服务器，大功告成。
一些需要初始化的东东
/* 省市区实体类*/ private ProvinceArea provence; private CityArea city; private CountryArea country; /*省市区适配器*/ private ArrayAdapter<ProvinceArea> adapter01; private ArrayAdapter<CityArea> adapter02; private ArrayAdapter<CountryArea> adapter03; /*省市区集合*/ private ArrayList<ProvinceArea> pData = new ArrayList<ProvinceArea>(); private ArrayList<CityArea> cityData; private ArrayList<CountryArea> countryData; private ArrayList<String> provinceCode = new ArrayList<String>(); private ArrayList<String> provinceName = new ArrayList<String>();
ps：一般情况下，spinner默认选中index为0的项，这时候在获取城市编号的时候，会报空指针；需要加如上代码
provence = pData.get(0); <pre name="code" class="html">city = pData.get(0).getCityList().get(0); ...
如有不当之处，敬请指出。