refactor(home): 用FlexboxLayoutManager替换GridLayoutManager，支持动态行列布局

FlexboxLayoutManager(COLUMN+WRAP)天然列优先排列，数据无需重排。
item宽高在拿到接口行列数后直接计算，适配任意rows×cols配置。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/build.gradle.kts

@@ -87,6 +87,8 @@ dependencies {
 
     implementation("org.greenrobot:eventbus:3.3.1")
 
+    implementation("com.google.android.flexbox:flexbox:3.0.0")
+
 //    implementation("io.github.jeremyliao:live-event-bus-x:1.8.0")
 //    implementation("com.hoho:android-usb-serial:1.3.0")
 //    implementation("io.github.jeadyx:jserialport:1.5")

app/src/main/java/com/sw/scalefusion/shelf/HomeV3Activity.kt

@@ -23,8 +23,11 @@ import com.shuwei.intelligent.shelves.serial.ProtocolConstants
 import com.shuwei.intelligent.shelves.serial.ProtocolConstants.C_TEMP_CMD
 import com.shuwei.intelligent.shelves.serial.ProtocolConstants.START_TEMP_CTRL_CMD
 import com.shuwei.intelligent.shelves.serial.ScaleManager
-import com.shuwei.intelligent.shelves.utils.GridLayoutTool
+import com.google.android.flexbox.FlexDirection
+import com.google.android.flexbox.FlexWrap
+import com.google.android.flexbox.FlexboxLayoutManager
 import com.shuwei.intelligent.shelves.utils.IntervalExecutor
+import com.shuwei.intelligent.shelves.utils.ext.dp
 import com.shuwei.intelligent.shelves.utils.ext.gone
 import com.shuwei.intelligent.shelves.utils.ext.toast
 import com.shuwei.intelligent.shelves.utils.ext.visible
@@ -153,10 +156,15 @@ class HomeV3Activity : BaseActivity() {
         log("updateUI: slots=${slots.size}, rows=$rows, columns=$columns")
 
         list.clear()
-        list.addAll(GridLayoutTool.initListSortV3(rows = rows, columns = columns, source = slots))
+        list.addAll(slots)
+
+        val displayMetrics = resources.displayMetrics
+        // 减去 RecyclerView + item 自身的 margin
+        shelfAdapter.itemWidth = (displayMetrics.widthPixels - 24.dp) / columns - 24.dp
+        shelfAdapter.itemHeight = (displayMetrics.heightPixels - 68.dp) / rows - 24.dp
 
         if (binding.rvShelf.adapter == null) {
-            initRecyclerView(columns)
+            initRecyclerView()
         } else {
             shelfAdapter.notifyDataSetChanged()
         }
@@ -258,8 +266,11 @@ class HomeV3Activity : BaseActivity() {
         shelfAdapter.notifyItemChanged(position)
     }
 
-    private fun initRecyclerView(columns: Int) {
-        val layoutManager = GridLayoutTool.getLayoutManagerV2(this, columns = columns)
+    private fun initRecyclerView() {
+        val layoutManager = FlexboxLayoutManager(this).apply {
+            flexDirection = FlexDirection.COLUMN
+            flexWrap = FlexWrap.WRAP
+        }
         binding.rvShelf.let {
             it.layoutManager = layoutManager
             it.adapter = shelfAdapter
@@ -345,7 +356,7 @@ class HomeV3Activity : BaseActivity() {
     /** 全量同步格口重量 */
     private fun syncShelfGoodsToServer() {
         if (list.isEmpty()) return
-        val submitList = GridLayoutTool.submitListSortV3(list)
+        val submitList = list.sortedBy { it.slotNo.toIntOrNull() ?: 0 }
         viewModel.syncWeight(
             SyncWeightRequest(
                 cabinetType = cabinetType,

app/src/main/java/com/sw/scalefusion/shelf/adapter/ShelfV3Adapter.kt

@@ -7,6 +7,7 @@ import androidx.annotation.ColorRes
 import androidx.core.content.ContextCompat
 import com.chad.library.adapter4.BaseQuickAdapter
 import com.chad.library.adapter4.viewholder.QuickViewHolder
+import com.google.android.flexbox.FlexboxLayoutManager
 import com.shuwei.intelligent.shelves.R
 import com.shuwei.intelligent.shelves.databinding.ListItemShelfV3Binding
 import com.sw.scalefusion.shelf.model.SlotModel
@@ -15,6 +16,12 @@ import kotlin.math.abs
 class ShelfV3Adapter(list: MutableList<SlotModel>) :
     BaseQuickAdapter<SlotModel, ShelfV3Adapter.VH>(list) {
 
+    /** 每个格口 item 的高度（像素），由 Activity 动态计算 */
+    var itemHeight: Int = 0
+
+    /** 每个格口 item 的宽度（像素），由 Activity 动态计算 */
+    var itemWidth: Int = 0
+
     inner class VH(val binding: ListItemShelfV3Binding) : QuickViewHolder(binding.root)
 
     override fun onCreateViewHolder(context: Context, parent: ViewGroup, viewType: Int): VH {
@@ -24,6 +31,12 @@ class ShelfV3Adapter(list: MutableList<SlotModel>) :
 
     override fun onBindViewHolder(holder: VH, position: Int, item: SlotModel?) {
         item ?: return
+        // 动态设置 item 宽高
+        val lp = holder.itemView.layoutParams as? FlexboxLayoutManager.LayoutParams
+        lp?.apply {
+            if (itemWidth > 0) width = itemWidth
+            if (itemHeight > 0) height = itemHeight
+        }
         val binding = holder.binding
 
         // 格口编号

app/src/main/res/layout/list_item_shelf_v3.xml

@@ -3,8 +3,8 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/layoutCard"
-    android:layout_width="match_parent"
-    android:layout_height="216dp"
+    android:layout_width="0dp"
+    android:layout_height="0dp"
     android:layout_margin="12dp"
     app:cardBackgroundColor="@color/bg_card_blue"
     app:cardCornerRadius="12dp"