Kotlin-使用Android-PickerView实现地址三级联动选择器

使用Android-PickerView选择器实现地址选择器

实现效果

20181117030512773.jpg

导入依赖

```

api 'com.contrarywind:Android-PickerView:4.1.6'

```

导入最新地址数据Json文件到与assets目录（若没有assets则新建，目录与res同级）

创建实体类(用来Json2Bean)

```

import com.contrarywind.interfaces.IPickerViewData

//存放省以及所属市

data class PCACodePO(

        val code: String,

        val name: String,

        val children: MutableList

)

//存放市以及所属辖区

data class CCodePO(

        val code: String,

        val name: String,

        val children: MutableList

)

//用于显示PickerView显示

data class AddressInfoPO(

        //地区编码

        val code: String,

        //地区名称

        val name: String

) : IPickerViewData {

    override fun getPickerViewText(): String = name

}

```

编写获取json文件内容工具类

```

import android.content.Context

import android.content.res.AssetManager

import java.io.*

object FileUtil{

    fun getAssetsFileText(context: Context,fileName:String):String{

        val strBuilder=StringBuilder()

        val assetManager=context.assets

        val bf =BufferedReader(InputStreamReader(assetManager.open(fileName)))

        bf.use { strBuilder.append(it.readLine())}

        bf.close()

        return strBuilder.toString()

    }

}

```

显示PickerView

```

/**

* 显示地址选择

*/

override fun showAddressPicker(provinceItems: MutableList,

                              cityItems: MutableList>,

                              areaItems: MutableList>>) {

    val addressPv =

            OptionsPickerBuilder(this, OnOptionsSelectListener { options1, options2, options3, v ->

                //省份

                provinceItems[options1]

                //城市

                cityItems[options1][options2]

                //辖区

                areaItems[options1][options2][options3]

            })

                    .setTitleText(pickerEnum.title)

                    .setDividerColor(Color.BLACK)

                    .setTextColorCenter(Color.BLACK) //设置选中项文字颜色

                    .setContentTextSize(20)

                    .build()

    addressPv.setPicker(provinceItems, cityItems, areaItems)

    addressPv.show()

}

```

初始化三级联动所需数据

```

/**

* 初始化地址数据

*/

fun initAddressPicker() {

    val provinceItems = mutableListOf()

    val cityItems = mutableListOf>()

    val areaItems = mutableListOf>>()

    //Json2Bean

    val pcaCodeList = Gson().fromJson>(FileUtil.getAssetsFileText(mApplication, "pcacode.json"), object : TypeToken>() {}.type)

    //遍历省

    pcaCodeList.forEach {pcaCode ->

        //存放省内市区

        val cityList= mutableListOf()

        //存放省内所有辖区

        val areaList= mutableListOf>()

        //遍历省内市区

        pcaCode.children.forEach { cCode ->

            //添加省内市区

            cityList.add(AddressInfoPO(cCode.code,cCode.name))

            //存放市内辖区

            val areas= mutableListOf()

            //添加市内辖区

            cCode.children.forEach {addressInfo->

                areas.add(addressInfo)

            }

            areaList.add(areas)

        }

        //添加省份

        provinceItems.add(AddressInfoPO(pcaCode.code,pcaCode.name))

        //添加市区

        cityItems.add(cityList)

        //添加辖区

        areaItems.add(areaList)

    }

    //显示选择器

    mRootView.showAddressPicker(provinceItems,cityItems,areaItems)

}

```