97 lines
3.7 KiB
Kotlin
97 lines
3.7 KiB
Kotlin
package com.sw.platecabinet.activity
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import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
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import android.view.ViewGroup
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import android.widget.LinearLayout
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import android.widget.TextView
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import androidx.appcompat.app.AppCompatActivity
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import androidx.recyclerview.widget.GridLayoutManager
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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import com.sw.platecabinet.R
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import kotlin.math.ceil
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class TestActivity : AppCompatActivity() {
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private lateinit var parentRecyclerView: RecyclerView
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private lateinit var pageAdapter: PageAdapter
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private val itemsPerPage = 22 // 每行2个，每列11个，共22个
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_test)
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parentRecyclerView = findViewById(R.id.parentRecyclerView)
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parentRecyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.HORIZONTAL, false)
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// 假设有100个数据项
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val allItems = (1..30).map { "Item $it" }
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val pages = allItems.chunked(itemsPerPage)
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pageAdapter = PageAdapter(pages)
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parentRecyclerView.adapter = pageAdapter
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}
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private fun convertToColumnFirst(original: List<String>, cols: Int): List<String> {
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val rows = ceil(original.size.toDouble() / cols).toInt()
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return List(original.size) { pos ->
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val row = pos % rows
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val col = pos / rows
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val originalPos = col + row * cols
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original.getOrElse(originalPos) { "" }
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}
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}
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inner class PageAdapter(private val pages: List<List<String>>) :
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RecyclerView.Adapter<PageAdapter.PageViewHolder>() {
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PageViewHolder {
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val view = LayoutInflater.from(parent.context)
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.inflate(R.layout.page_item_layout, parent, false)
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return PageViewHolder(view)
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}
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override fun onBindViewHolder(holder: PageViewHolder, position: Int) {
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holder.bind(pages[position])
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}
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override fun getItemCount(): Int = pages.size
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inner class PageViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
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private val childRecyclerView: RecyclerView =
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itemView.findViewById(R.id.childRecyclerView)
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fun bind(items: List<String>) {
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childRecyclerView.layoutManager = GridLayoutManager(itemView.context, 2)
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childRecyclerView.adapter = ChildAdapter(items)
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}
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}
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}
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inner class ChildAdapter(private val items: List<String>) :
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RecyclerView.Adapter<ChildAdapter.ItemViewHolder>() {
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder {
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val view = LayoutInflater.from(parent.context)
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.inflate(R.layout.item_bind_view, parent, false)
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return ItemViewHolder(view)
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}
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override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
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holder.bind(position, items[position])
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}
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override fun getItemCount(): Int = items.size
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inner class ItemViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
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private val llRoot: LinearLayout = itemView.findViewById(R.id.ll_root)
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private val tvNum: TextView = itemView.findViewById(R.id.tv_num)
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fun bind(position: Int, item: String) {
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tvNum.text = item
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llRoot.setBackgroundResource(if (position % 3 == 0) R.drawable.grid_item_bind else R.drawable.grid_item_unbind)
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}
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}
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}
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} |