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在RecyclerView中,onCreateViewHolder方法将根据需要创建新的视图持有者。我知道它会被调用多次,因为列表中的项目可以放在屏幕上。但是,由于某种奇怪的原因,当我向下滚动我的RecyclableList时,会再次调用onCreateViewHolder。为什么它会创建一个新的viewHolder?在什么情况下会查看待办事项?我认为它只需要调用一次。RecyclerView - onCreateViewHolders在被刮下时被多次调用
的logcat:
09-27 16:39:20.805 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.814 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.817 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.818 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.822 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.825 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.826 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
当我向下滚动,这些被调用:
09-27 16:39:20.827 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.828 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED
09-27 16:39:20.830 8603-8603/teamtreehouse.com.myapplication D/testHourViewHolder: I AM INVOKED