Android用RecyclerView实现图标拖拽排序以及增删管理

// 当前的操作状态
enum class Option {
 ADD, REMOVE, NONE
}

if (enable) {
 itemTouchHelper.attachToRecyclerView(binding.rvApps)
} 

val newData = mutableListOf<Pair<String, Int>>()
commonAppsAdapter.data.forEachIndexed { index, _ ->
 val holder = recyclerView.findViewHolderForAdapterPosition(index) as AppsHolder
 newData.add(Pair(holder.funcUrl, index))
}
for (i in newData) {
  val sameFuncIndex = commonAppsAdapter.data.indexOfFirst { i.first == it.uid }
  Collections.swap(commonAppsAdapter.data, i.second, sameFuncIndex)
}

commonAppsAdapter.onRemoveBtnClickListener = object : OnRemoveBtnClickListener {
 override fun onClick(view: View, appBean: AppBean) {
  val theSameElementIndex = allAppsAdapter.data.indexOfFirst { it.uid == appBean.uid }
  if (theSameElementIndex < 0) return
  allAppsAdapter.data[theSameElementIndex].option = AppBean.Companion.Option.ADD
  allAppsAdapter.notifyItemChanged(theSameElementIndex)
 }
}