如何在 kotlin 中将 Json 数据解析为 tablayout？答案

【问题标题】：How to Json data parse to tablayout in kotlin?如何在 kotlin 中将 Json 数据解析为 tablayout？
【发布时间】：2020-04-29 10:51:30
【问题描述】：

我有一个 json 数据。我想将其解析为选项卡。当我使用邮递员并发送请求时。结果响应此图像。

我已经设置了接口 API，并尝试使用改造来回调响应。但我失败了。检查我的代码，如何修复 ViewPagerAdapter 和 MainActivity？有人可以帮忙吗？

接口 API

interface API{
    @Headers("Content=Type:application/json","Authorization:token:String")


    @GET("/store/category/info")
    fun getcategory(@Header("Authorization") token: String?):Call<Category>
}

主活动

class MainActivity : AppCompatActivity() {

  lateinit var  tabLayout:TabLayout
  lateinit  var viewPager: ViewPager

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


        val token = SharedPreference.getTokenInfo(applicationContext)

        Client.retrofitService.getcategory(token).enqueue(object:Callback<Category>{

            override fun onResponse(call: Call<Category>, response: Response<Category>) {
                Log.d("test","Category complete")
                viewPager = findViewById(R.id.viewpager) as ViewPager
                setupViewPager(viewPager)
                tabLayout = findViewById(R.id.category_tab_layout) as TabLayout
                tabLayout.setupWithViewPager(viewPager)
            }

            override fun onFailure(call: Call<Category>, t: Throwable) {
                Log.d("test","Category fail")
            }

        })
    }
    private fun setupViewPager(viewPager: ViewPager) {
        var adapter: ViewPagerAdapter = ViewPagerAdapter(supportFragmentManager)

        viewPager.adapter = adapter

    }
}

ViewPagerAdapter

class ViewPagerAdapter: FragmentPagerAdapter {

    private val mFragmentList: MutableList<Fragment> = mutableListOf()
    private val mFragmentTitleList: MutableList<Child> = mutableListOf()

    constructor(manager: FragmentManager) : super(manager)


    override fun getItem(position: Int): Fragment {

        return mFragmentList.get(position)
    }

    override fun getCount(): Int {

        return mFragmentList.size

    }

    override fun getPageTitle(position: Int): CharSequence? {

        return mFragmentTitleList.get(position).title
    }

}

【问题讨论】：

标签： json android-studio kotlin retrofit

【解决方案1】：

试试这个

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


        val token = SharedPreference.getTokenInfo(applicationContext)
                viewPager = findViewById(R.id.viewpager) as ViewPager
                tabLayout = findViewById(R.id.category_tab_layout) as TabLayout

        Client.retrofitService.getcategory(token).enqueue(object:Callback<Category>{

            override fun onResponse(call: Call<Category>, response: Response<Category>) {
                Log.d("test","Category complete")
                setupViewPager(viewPager)
                tabLayout.setupWithViewPager(viewPager)
            }

            override fun onFailure(call: Call<Category>, t: Throwable) {
                Log.d("test","Category fail")
            }

        })
    }

【讨论】：