测试一下内存会不会爆
需要准备：
1.省市区三份json
2.依赖三级联动控件 compile 'com.contrarywind:Android-PickerView:3.2.4'
最终效果如下：
如下提供一个工具类：
package com.zyf.fwms.commonlibrary.pickerview;
import android.content.Context;
import android.util.Log;
import android.view.View;
import com.bigkoo.pickerview.OptionsPickerView;
import com.bigkoo.pickerview.TimePickerView;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import com.google.gson.reflect.TypeToken;
import com.zyf.fwms.commonlibrary.utils.LogUtil;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* 公司：杭州融科网络科技
* 刘宇飞 创建 on 2017/3/7.
* 描述：pickerview工具类
*/
public class PickCityUtil {
public static List options1Items = new ArrayList<>();//一级
public static List> options2Items = new ArrayList<>();//二级
public static List>> options3Items = new ArrayList<>();//三级
public static List areaId1 = new ArrayList<>();//一级
public static List> areaId2 = new ArrayList<>();//二级
public static List>> areaId3 = new ArrayList<>();//三级
private static Gson gson;
public static void initData(final Context context) {
new Thread(new Runnable() {
@Override
public void run() {
try {
setProvince(context);
setCity(context);
setArea(context);
}catch (Exception e){
LogUtil.getInstance().e(e.getMessage());
}
}
}).start();
}
/**
* 生成省份列表
*/
public static void setProvince(Context context) {
//读取省份字符串
String province = getAssetsJson(context, "json/province.json");
if (province != null && province.length() > 0) {
List list = getCityList(province);
if (!list.isEmpty()) {
options1Items.clear();
areaId1.clear();
for (CityModel model : list) {
options1Items.add(model.name);
areaId1.add(model.id);
}
}
}
}
/**
* 生成城市列表
*/
public static void setCity(Context context) {
//读取城市字符串
String city = getAssetsJson(context, "json/city.json");
try {
JSONObject jsonObject = new JSONObject(city);
for (String id : areaId1) {
List newCity = new ArrayList<>();
List newCityId = new ArrayList<>();
String cityJson = jsonObject.getString(id);
List cityList = getCityList(cityJson);
if (!cityList.isEmpty()) {
for (CityModel model : cityList) {
newCity.add(model.name);
newCityId.add(model.id);
}
}
options2Items.add(newCity);
areaId2.add(newCityId);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* 生成地区列表
*/
public static void setArea(Context context) {
//读取地区字符串
String area = getAssetsJson(context, "json/area.json");
try {
JSONObject jsonObject = new JSONObject(area);
for(List list1:areaId2){
List> newArea=new ArrayList<>();
List> newAreaId=new ArrayList<>();
for(String id:list1){
List newArea2 = new ArrayList<>();
List newArea2Id = new ArrayList<>();
String cityJson = jsonObject.getString(id);
List cityList = getCityList(cityJson);
if (!cityList.isEmpty()) {
for (CityModel model : cityList) {
newArea2.add(model.name);
newArea2Id.add(model.id);
}
}
newArea.add(newArea2);
newAreaId.add(newArea2Id);
}
options3Items.add(newArea);
areaId3.add(newAreaId);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* 获取list 集合
*/
public static List getCityList(String json) {
List list = new ArrayList<>();
JsonArray arry = new JsonParser().parse(json).getAsJsonArray();
for (JsonElement jsonElement : arry) {
list.add(getGson().fromJson(jsonElement, CityModel.class));
}
return list;
}
/**
* 获取资源文件字符串
*
* @param context
* @return
*/
public static String getAssetsJson(Context context, String fileName) {
try {
StringBuffer sb = new StringBuffer();
// InputStream is = context.getAssets().open("json/city.json");
InputStream is = context.getAssets().open(fileName);
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();
return sb.toString();
} catch (Exception e) {
return null;
}
}
/**
* 获取gson
*/
public static Gson getGson() {
if (gson == null)
gson = new Gson();
return gson;
}
/**
* 城市选择
*
* @param
* @param context
*/
public static void showCityPickView(Context context, final ChooseCityListener listener) {
if (options1Items.isEmpty() || options2Items.isEmpty() || options3Items.isEmpty()) {
return;
}
OptionsPickerView pvOptions = new OptionsPickerView.Builder(context, new OptionsPickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(int options1, int options2, int options3, View v) {
//返回的分别是三个级别的选中位置
String p = options1Items.get(options1);
String c = options2Items.get(options1).get(options2);
String a = "";
if (!options3Items.get(options1).get(options2).isEmpty())
a = options3Items.get(options1).get(options2).get(options3);
else
a = "--";
if (p.equals(c)) {
listener.chooseCity(c + "_" + a);
} else {
listener.chooseCity(p + "_" + c + "_" + a);
}
}
})
.setTitleText("选择城市")
.build();
pvOptions.setPicker(options1Items, options2Items, options3Items);
pvOptions.show();
}
/**
* 单列表
*
* @param
* @param context
*/
public static void showSinglePickView(Context context, final List list, String title, final ChoosePositionListener listener) {
if (list.isEmpty()) {
return;
}
OptionsPickerView pvOptions = new OptionsPickerView.Builder(context, new OptionsPickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(int options1, int options2, int options3, View v) {
listener.choosePosition(options1, list.get(options1));
}
})
.setTitleText(title)
.build();
pvOptions.setPicker(list);
pvOptions.show();
}
/**
* 双列表
*
* @param
* @param context
*/
public static void showDoublePickView(Context context, final List list1, final List> list2, String title, final ChooseDPositionListener listener) {
if (list1.isEmpty() || list2.isEmpty()) {
return;
}
OptionsPickerView pvOptions = new OptionsPickerView.Builder(context, new OptionsPickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(int options1, int options2, int options3, View v) {
try {
listener.choosePosition(options1, options2, list1.get(options1) + "_" + list2.get(options1).get(options2));
} catch (Exception e) {
LogUtil.getInstance().e(e.getMessage());
}
}
})
.setTitleText(title)
.build();
pvOptions.setPicker(list1, list2);
pvOptions.show();
}
/**
* @param
* @param context
*/
public static void showCityPickView(Context context, final ChooseCityListener listener, final ChooseCityAreaIdListener areaIdListener) {
if (options1Items.isEmpty() || options2Items.isEmpty() || options3Items.isEmpty()) {
return;
}
OptionsPickerView pvOptions = new OptionsPickerView.Builder(context, new OptionsPickerView.OnOptionsSelectListener() {
@Override
public void onOptionsSelect(int options1, int options2, int options3, View v) {
//返回的分别是三个级别的选中位置
String p = options1Items.get(options1);
String c = options2Items.get(options1).get(options2);
String a = "";
if (!options3Items.get(options1).get(options2).isEmpty())
a = options3Items.get(options1).get(options2).get(options3);
else
a = "--";
if (p.equals(c)) {
listener.chooseCity(c + "_" + a);
} else {
listener.chooseCity(p + "_" + c + "_" + a);
}
String ap = areaId1.get(options1);
String ac = areaId2.get(options1).get(options2);
String aa = "";
if (!areaId3.get(options1).get(options2).isEmpty())
aa = areaId3.get(options1).get(options2).get(options3);
else aa = "--";
areaIdListener.chooseAreaId(ap + "_" + ac + "_" + aa);
}
})
.setTitleText("选择城市")
.build();
pvOptions.setPicker(options1Items, options2Items, options3Items);
pvOptions.show();
}
/**
* 显示时间
*/
public static void showTimeDialog(Context context, final ChooseTimeListener listener) {
//时间选择器
TimePickerView pvTime = new TimePickerView.Builder(context, new TimePickerView.OnTimeSelectListener() {
@Override
public void onTimeSelect