Android省市区三级联动

1.      首先非常感谢鸿洋，大神是CSDN上我非常敬仰开发工程师。我是在大神提供的demo基础上稍稍改动一下就达到我自己想要的效果

2.      我的省市区实现的是能够动态修改自定义控件的数据，非常简单就是你需要什么信息传递什么信息，数据就能改动，直接拷贝到自己的项目中就能用

3.      部分关键代码，完整的代码自行下载使用

1)     解析json数据

private void initJsonData1() {try {StringBuffer sb = new StringBuffer();InputStream is = getAssets().open("area.json");int len = -1;byte[] buf = new byte[1024];while ((len = is.read(buf)) != -1) {sb.append(new String(buf, 0, len, "utf-8"));}is.close();mJsonObj1 = new JSONArray(sb.toString());} catch (IOException e) {e.printStackTrace();} catch (JSONException e) {e.printStackTrace();}}

2)     加载解析的省市区数据

private void initJson() {try {for (int i = 0; i < mJsonObj1.length(); i++) {JSONObject jsonP = mJsonObj1.getJSONObject(i);// 每个省的json对象String province = jsonP.getString("name");String cityList = jsonP.getString("cityList");// Log.i("province", province);provinceshuzu.add(province);array1 = (String[]) provinceshuzu.toArray(new String[provinceshuzu.size()]);// Log.i("provinceshuzu1", ""+Arrays.asList(array1));JSONArray array = new JSONArray(cityList);for (int k = 0; k < array.length(); k++) {JSONObject jsonC = array.getJSONObject(k);// 每个省的json对象city = jsonC.getString("name");areaList = jsonC.getString("areaList");name = areaList.substring(1, areaList.length() - 1);name1 = name.replace("\"", "");name2 = name1.replace("\",", ",");name3 = name2.split(",");// Log.i("5555559999", ""+Arrays.asList(name3));if (province.equals("北京")) {cityshuzu.add("京" + city);mAreaDatasMap1.put("京" + city, name3);} else if (province.equals("天津")) {cityshuzu.add("津" + city);mAreaDatasMap1.put("津" + city, name3);} else if (province.equals("上海")) {cityshuzu.add("沪" + city);mAreaDatasMap1.put("沪" + city, name3);} else {cityshuzu.add(city);mAreaDatasMap1.put(city, name3);}array2 = (String[]) cityshuzu.toArray(new String[cityshuzu.size()]);// Log.i("9999", ""+Arrays.asList(array2));}cityshuzu.clear();mCitisDatasMap1.put(province, array2);}} catch (Exception e) {}mJsonObj1 = null;}

3)     根据当前的省更新市

private void updateCities() {int pCurrent = mProvince.getCurrentItem();mCurrentProviceName = array1[pCurrent];String[] cities = mCitisDatasMap1.get(mCurrentProviceName);if (cities == null) {cities = new String[] { "" };}Log.i("777771111111", "" + mCurrentProviceName);Log.i("77777", "" + Arrays.asList(cities));mCity.setViewAdapter(new ArrayWheelAdapter<String>(this, cities));mCity.setCurrentItem(0);updateAreas();}

4)  根据当前的市更新相应的区

private void updateAreas() {int pCurrent = mCity.getCurrentItem();mCurrentCityName = mCitisDatasMap1.get(mCurrentProviceName)[pCurrent];Log.i("5555555555", "--" + mCurrentCityName);Log.i("5555555555", "--" + mCitisDatasMap1.get(mCurrentProviceName)[pCurrent]);String[] areas = mAreaDatasMap1.get(mCurrentCityName);if (areas == null) {areas = new String[] { "" };}Log.i("6666666666", "" + Arrays.asList(areas));mArea.setViewAdapter(new ArrayWheelAdapter<String>(this, areas));mArea.setCurrentItem(0);} 

5)     联动效果的实现代码

@Overridepublic void onChanged(WheelView wheel, int oldValue, int newValue) {if (wheel == mProvince) {Log.i("4444444444444444", "8888888888888");updateCities();if (mAreaDatasMap1 != null && mAreaDatasMap1.get(mCurrentCityName) != null) {mCurrentAreaName = mAreaDatasMap1.get(mCurrentCityName)[0];} else {mCurrentAreaName = "";}} else if (wheel == mCity) {updateAreas();// 地区if (mAreaDatasMap1 != null && mAreaDatasMap1.get(mCurrentCityName) != null) {mCurrentAreaName = mAreaDatasMap1.get(mCurrentCityName)[0];} else {mCurrentAreaName = "";}} else if (wheel == mArea) {mCurrentAreaName = mAreaDatasMap1.get(mCurrentCityName)[newValue];if (mAreaDatasMap1 != null && mAreaDatasMap1.get(mCurrentCityName) != null) {mCurrentAreaName = mAreaDatasMap1.get(mCurrentCityName)[newValue];} else {mCurrentAreaName = "";}}}

6)     动态更新省市区的代码

private void changeSheng(String sheng) {Log.i("sheng", sheng);for (int i = 0; i < array1.length; i++) {if (array1[i].equals(sheng)) {mProvince.setCurrentItem(i);Log.i("sheng", array1[i]);}}}private void changeShi(String shi) {Log.i("shi", shi);int pCurrent = mProvince.getCurrentItem();mCurrentProviceName = array1[pCurrent];String[] cities = mCitisDatasMap1.get(mCurrentProviceName);if (cities == null) {cities = new String[] { "" };}for (int i = 0; i < cities.length; i++) {if (cities[i].equals(shi)) {mCity.setCurrentItem(i);Log.i("shi1111111", cities[i]);}}}private void changeQu(String qu) {Log.i("qu", qu);int pCurrent = mCity.getCurrentItem();mCurrentCityName = mCitisDatasMap1.get(mCurrentProviceName)[pCurrent];String[] areas = mAreaDatasMap1.get(mCurrentCityName);if (areas == null) {areas = new String[] { "" };}for (int i = 0; i < areas.length; i++) {if (areas[i].equals(qu)) {mArea.setCurrentItem(i);Log.i("qu111111", areas[i]);}}}

6.      如需修改代码只需要改动以下内容

1)     根据json数据的不同自行解析自己的json数据就行，相信大家对于解析json很擅长。

2)     乱码的问题：用editplus重新编码json文件，然后将代码中解码也改成utf-8在试一下。

代码下载地址
点击打开链接