okhttp

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val url="http://localhost:8080/kotlin/hello.json"
        var client=OkHttpClient()
        var request=Request.Builder().url(url).get().build()
        client.newCall(request).enqueue(object:Callback{
            override fun onFailure(call: Call, e: IOException) {
            }

            override fun onResponse(call: Call, response: Response) {
                println("返回的内容是-----------------"+response.body?.string())
            }})

//        readPage()
    }

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 gson解析json

1.简单测试

MainActivity.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val string="""{"name":"jack","age":"20","hobbies":{"indoor":"music","outdoor":"basketball"},"other":[{"workin":"baidu","duration":"3years"},{"workin":"google","duration":"1years"}]}"""

        val gson:Gson= Gson()
        try {
            val student = gson.fromJson<Student>(string, Student::class.java)
            println(student.hobbies?.indoor)
            println(student.other[1].workin)
            println("解析json成功")
        }catch (e:Exception){
            println("解析json失败")
        }

    }
}

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Student.kt

open class Student {

    //{"name":"jack","age":"20","hobbies":{"indoor":"music","outdoor":"basketball"},"other":[{"workin":"baidu","duration":"3years"},{"workin":"google","duration":"1years"}]}
    var name:String?=null
    var age:Int?=null
    var hobbies:Hobbies?=null
    var other= listOf<Other>()

}
open class Hobbies() {
    var indoor:String?= null
    var outdoor:String?=null
}

open class Other(){
    var workin:String?=null
    var duration:String?=null
}

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2.解析QQ音乐MV界面返回的json

写这个真心花了好长的时间。。那个发送get请求的url有空再研究下

MainActivity.kt

class MainActivity : AppCompatActivity() ,AnkoLogger{

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val url="https://u.y.qq.com/cgi-bin/musicu.fcg?-=mvlib9586712011620675&g_tk=5381&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq.json&needNewCode=0&data=%7B%22comm%22%3A%7B%22ct%22%3A24%7D%2C%22mv_list%22%3A%7B%22module%22%3A%22MvService.MvInfoProServer%22%2C%22method%22%3A%22GetAllocMvInfo%22%2C%22param%22%3A%7B%22start%22%3A0%2C%22size%22%3A20%2C%22version_id%22%3A7%2C%22area_id%22%3A19%2C%22order%22%3A0%7D%7D%7D&mv_list"
        //val url="http://localhost:8080/kotlin/hotel.json"
        var client=OkHttpClient()
        var request=Request.Builder().url(url).get().build()
        client.newCall(request).enqueue(object:Callback{
            override fun onFailure(call: Call, e: IOException) {
            }

            override fun onResponse(call: Call, response: Response) {
                val gson: Gson= Gson()
                try {
                    val mvListResp=gson.fromJson<MvListResp>(response.body?.string(),MvListResp::class.java)//object:TypeToken<MvListResp>(){}.type
                    println(mvListResp.mv_list?.data?.list!![0].singers[0].name)
                } catch (e: Exception) {
                    println("解析JSON数据失败")
                    e.printStackTrace()

                }
            }})


    }

}

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MVListResponse.kt

class MvListResp {
    var code: Int? = null
    var ts: Long? = null
    var mv_list: MvList? = null
}

class MvList() {
    var code: Int? = null
    var data:MvListData?=null
    var total: Int? = null
}

class MvListData(){
    var list= listOf<MvInfo>()
}

class MvInfo() {
    var comment_cnt: Int? = null
    var diff: Int? = null
    var duration: Int? = null
    var has_fav: Int? = null
    var has_star: Int? = null
    var mv_switch: Int? = null
    var mvid: Int? = null
    var picurl: String? = null
    var playcnt: Int? = null
    var pubdate: Long? = null
    var score: Int? = null
    var singers = listOf<SingeInfo>()
    var star_cnt: Int? = null
    var subtitle: String? = null
    var title: String? = null
    var uploader: Uploader? = null
    var vid: String? = null
}

class SingeInfo() {
    var id: Int? = null
    var mid: String? = null
    var name: String? = null
    var picurl: String? = null
}

class Uploader() {
    var enc_uin: String? = null
    var headurl: String? = null
    var nick: String? = null
}

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标签：Int,String,杂七杂八,22%,有效,var,null,class,亲测
来源： https://www.cnblogs.com/vocus/p/12267544.html