androidx.recyclerview.widget.RecyclerView的使用方法

Posted 2021-02-21 天也高 地也厚

首先需要在布局里添加一下组件

<androidx.recyclerview.widget.RecyclerView
                android:id="@+id/recipe_list_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="100dp">
            </androidx.recyclerview.widget.RecyclerView>

 

然后再代码中初始化

private lateinit var recyclerView: RecyclerView
private lateinit var viewManager: RecyclerView.LayoutManager
private lateinit var viewAdapter: RecyclerView.Adapter<*>

fun initListView() {
    val viewManager = LinearLayoutManager(MyApplication.getContext())
    viewManager.orientation = LinearLayoutManager.HORIZONTAL
    this.viewManager = viewManager
    viewAdapter = MyAdapter(forecast)

    recyclerView = binding.recipeListView.apply {
        layoutManager = viewManager
        adapter = viewAdapter
        setHasFixedSize(true)
    }
}

//创建Adapt

class MyAdapter(var list: MutableList<Forecast>) :
    RecyclerView.Adapter<MyAdapter.ViewListViewHolder>() {
　　　
　　//新建ViewHolder
    class ViewListViewHolder(var viewItem: View) : RecyclerView.ViewHolder(viewItem) {}

    private val inflater: LayoutInflater =
        MyApplication.getContext()
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewListViewHolder {
        var view = inflater.inflate(R.layout.forecast, parent, false)

        return ViewListViewHolder(view)
    }

    override fun getItemCount(): Int {
        return list.size
    }

    override fun onBindViewHolder(holder: ViewListViewHolder, position: Int) {

        holder.viewItem.findViewById<TextView>(R.id.text_weekday_tem_one).apply {
            this.text = list[position].tmp_max + "°" + "/" + list[position].tmp_min + "°"
            this.typeface = MainActivity.getEnglishFontsOne()
        }

        holder.viewItem.findViewById<TextView>(R.id.text_weekday_one).apply {
            val df = SimpleDateFormat("yyyy-MM-dd")
            val date = df.parse(list[position].date)
            this.text = SpUtils.getWeek(date)
            this.typeface = MainActivity.getMyFonts()
        }

        holder.viewItem.findViewById<ImageView>(R.id.image_weekday_one).apply {
            this.setImageResource(MyIconUtils.getWeatherIcon(list[position].cond_code_d))
        }
    }
}