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(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(this, areas));
		mArea.setCurrentItem(0);
	} 

5)     联动效果的实现代码

@Override
	public 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
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