73 lines
2.6 KiB
Kotlin
73 lines
2.6 KiB
Kotlin
package com.xscm.moduleutil.diff
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import android.os.Bundle
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import androidx.recyclerview.widget.DiffUtil
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import com.xscm.moduleutil.bean.CircleListBean
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class CircleListDiffCallback(
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private val oldList: List<CircleListBean>?,
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private val newList: List<CircleListBean>?
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) :
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DiffUtil.Callback() {
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override fun getOldListSize(): Int {
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return oldList?.size ?: 0
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}
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override fun getNewListSize(): Int {
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return newList?.size ?: 0
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}
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override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
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return oldList!![oldItemPosition].id == newList!![newItemPosition].id
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}
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override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
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val oldItem = oldList!![oldItemPosition]
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val newItem = newList!![newItemPosition]
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// 判断核心数据是否一致（排除动态字段）
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if (!equalsStr(oldItem.nickname, newItem.nickname)) return false
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if (!equalsStr(oldItem.avatar, newItem.avatar)) return false
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if (!equalsStr(oldItem.content, newItem.content)) return false
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if (oldItem.is_like != newItem.is_like) return false
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if (oldItem.sex != newItem.sex) return false
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if (!equalsStr(oldItem.images, newItem.images)) return false
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// 动态字段不参与整体比较（让 getChangePayload 控制）
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return equalsStr(oldItem.rewards_num, newItem.rewards_num)
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&& equalsStr(oldItem.like_num, newItem.like_num)
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&& equalsStr(oldItem.comment_num, newItem.comment_num)
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// && equalsStr(oldItem.read_num, newItem.read_num)
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}
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override fun getChangePayload(oldItemPosition: Int, newItemPosition: Int): Any? {
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val oldItem = oldList!![oldItemPosition]
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val newItem = newList!![newItemPosition]
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val diff = Bundle()
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if (!equalsStr(oldItem.rewards_num, newItem.rewards_num)) {
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diff.putString("rewards_num", newItem.rewards_num)
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}
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if (!equalsStr(oldItem.like_num, newItem.like_num)) {
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diff.putString("like_num", newItem.like_num)
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diff.putInt("is_like",newItem.is_like)
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}
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if (!equalsStr(oldItem.comment_num, newItem.comment_num)) {
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diff.putString("comment_num", newItem.comment_num)
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}
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// if (!equalsStr(oldItem.read_num, newItem.read_num)) {
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// diff.putString("read_num", newItem.read_num)
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// }
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return if (diff.size() == 0) null else diff
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}
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private fun equalsStr(a: String?, b: String?): Boolean {
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if (a == null && b == null) return true
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if (a == null || b == null) return false
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return a == b
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}
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}
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