如何使用 Klaxon 解析嵌套的 JSON 并在回收器视图中显示?

Question

这是我的 MainActivity.kt

class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var data = Klaxon()
.parseArray<ProductData>(readArray())
if(!data!!.isEmpty()) {
recyclerView.layoutManager = LinearLayoutManager(this)
recyclerView.hasFixedSize()
recyclerView.adapter = ListAdapter(data, { partItem : ProductData -> partItemClicked(partItem)})
}
}
private fun partItemClicked(partItem : ProductData) {
Toast.makeText(this, "You click ${partItem.title}", Toast.LENGTH_SHORT).show()
val showDetailActivityIntent = Intent(this, DetailProduct::class.java)
showDetailActivityIntent.putExtra(Intent.EXTRA_TEXT, partItem.title)
startActivity(showDetailActivityIntent)
}
private fun readArray(): String {
return application.assets.open("products.json").bufferedReader().use {
it.readText()
}
}

这是我的适配器，ListAdapter.kt

class ListAdapter (var catalogList: List<ProductData>, var clickListener: (ProductData) -> Unit) :
RecyclerView.Adapter<RecyclerView.ViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
var v = LayoutInflater.from(parent.context).inflate(R.layout.product_catalog_list, parent, false)
return ListHolder(v)
}
override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
(holder as ListHolder).bind(catalogList[position], clickListener)
}
override fun getItemCount() = catalogList.size
class ListHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
fun bind(_list: ProductData, clickListener: (ProductData) -> Unit) {
itemView.nama_produk.text = _list.title
itemView.deskripsi_produk.text = _list.snip
itemView.harga.text = _list.calc.toString()
itemView.setOnClickListener { clickListener(_list) }
}
}

我的 JSON 文件，产品.json

{
"snippets": [
{
"title": "Huben Tarikan Laci Sabit TH-211",
"snip": "Handle lemari atau laci dapat memudahkan penggunaan pada furniture rumah dengan ukuran yang bervariasi, desain&nbsp;..<br />",
"calc": 0
},
{
"title": "Huben Rak Piring Stainless RP + Ukuran",
"snip": "Huben rak piring dengan bahan stainless berkualitas sangat awet dan tahan lama ideal untuk keperluan dapur anda Huben&nbsp;..<br />",
"calc": 0
},
{
"title": "Huben Tarikan Laci TA-24 ",
"snip": "Tarikan laci huben berbahan stainless steel sangat awet dan tahan lama serta simple, gunakan tarikan ini sebagai&nbsp;..<br />",
"calc": 0
},
{
"title": "Yane A 910 Handle Laci Wooden / Tarikan Laci ",
"snip": " Tarikan laci kayu tidak pernah kalah dengan bahan stainless karena mampu mempercantik tampilan laci atau lemari.&nbsp;..<br />",
"calc": 0
},
{
"title": "Yane B - I006C Kitchen Set / Rak Dapur ",
"snip": " Ayo gunakan rak dapur kitchen set untuk menjaga kerapihan pada dapur Rak dapur minimalis sebagai tempat untuk&nbsp;..<br /><span class="priOffi">Rp 549.000</span><small class="unit"> / item</small>",
"calc": 0
},
{
"title": "Yane AI 002 L Kitchen Set / Rak Dapur ",
"snip": " Ayo beli dan gunakan rak dapur untuk menyimpan stok makanan agar rapi dan aman Rak dapur solusi untuk menyimpan barang&nbsp;..<br /><span class="priOffi">Rp 4.399.000</span><small class="unit"> / item</small>",
"calc": 0
}
]
}

我应该在我的klaxon((中做什么来调用嵌套在"片段"中的"标题"？

数据类怎么样？我应该申报什么？ 我不明白如何使用回收器视图显示调用嵌套 JSON 中的数据，尤其是使用 Klaxon。

Answer 1

你的数据类将是

data class ProductData(val snippets: List<SnippetsItem>?)
data class SnippetsItem(val snip: String = "",
val calc: Int = 0,
val title: String = "")

和解析器 JSON

val jsonFile= assets.open("myjson.json")
val result = Klaxon().parse<ProductData>(InputStreamReader(jsonFile))
val list = result?.snippets ?: emptyList()

这是列表。将此列表发送到回收商视图适配器。修改适配器

class ListAdapter(var catalogList: List<SnippetsItem>, var clickListener: ClickListener)
: RecyclerView.Adapter<ListAdapter.ListHolder>() {

interface ClickListener {
fun click(snip: SnippetsItem)
}
inner class ListHolder(itemView: View) : RecyclerView.ViewHolder(itemView),
View.OnClickListener {
override fun onClick(v: View?) {
val pos = adapterPosition
clickListener.click(catalogList[pos])
}
fun bind(snip: SnippetsItem) {
//bind with view
itemView.setOnClickListener(this)
}
}
}

现在在主要活动

class MainActivity : AppCompatActivity(),ListAdapter.ClickListener {

override fun click(snip: SnippetsItem) {
//do whatever you want
}
}