Android 使用数据绑定回收PagerAdapter中的视图

我一直在尝试在我的PagerAdapter中实现回收，我可以成功地做到这一点，但我遇到了一个问题，即使用数据绑定缓存视图

我试过这样做，保持一个

堆栈

：

---

我仍然会得到同样的错误。如何“回收”这样的数据绑定对象？或者，如果我回收视图本身，如何将它们转换回绑定对象？

我猜您犯了一个简单的错误。 你可以纠正我，如果我错了，我尝试了这个适配器，它的工作

val demoAdapter = object : PagerAdapter() {
        private var recycledViews: Stack<View> = Stack()

        var items: List<String> = ArrayList()
            set(value) {
                field = value
                notifyDataSetChanged()
            }

        override fun instantiateItem(container: ViewGroup, position: Int): Any {
            val binding = inflateOrRecycle(container)


            container.addView(binding.root)
            return binding.root
        }

        private fun inflateOrRecycle(container: ViewGroup): DemoItemBinding {
            val inflater = LayoutInflater.from(container.context)

            return if (recycledViews.isEmpty()) {
                DemoItemBinding.inflate(inflater, container, false)
            } else {
                val view = recycledViews.pop()
                val custBinding = DataBindingUtil.getBinding<DemoItemBinding>(view)
                if(custBinding == null)
                    DemoItemBinding.bind(view)
                else
                    custBinding
            }
        }

        override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
            val view = `object` as View

            container.removeView(view)
            recycledViews.add(view)
        }

        override fun isViewFromObject(view: View, `object`: Any): Boolean {
            return `object` is View && view.equals(`object`)
        }

        override fun getCount(): Int {
            return 4
        }
    }

到

返回if（recycledViews.isEmpty（））{
拆卸绑定。充气（充气机、容器、假）
}否则{
val view=recycledViews.pop（）
val custBinding=DataBindingUtil.getBinding（视图）
if（custBinding==null）
DemoItemBinding.bind（视图）
其他的
保管
}

---

我想，您试图绑定到一个已经附加了绑定的视图。因此，它给了你一个错误。我所做的是检查以前的任何绑定，如果有，请返回关联的绑定。

很抱歉测试此绑定的延迟。它工作得很好！

override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
    val view = `object` as View

    container.removeView(view)
    recycledViews.add(CustomBinding.bind(view))
}

val demoAdapter = object : PagerAdapter() {
        private var recycledViews: Stack<View> = Stack()

        var items: List<String> = ArrayList()
            set(value) {
                field = value
                notifyDataSetChanged()
            }

        override fun instantiateItem(container: ViewGroup, position: Int): Any {
            val binding = inflateOrRecycle(container)


            container.addView(binding.root)
            return binding.root
        }

        private fun inflateOrRecycle(container: ViewGroup): DemoItemBinding {
            val inflater = LayoutInflater.from(container.context)

            return if (recycledViews.isEmpty()) {
                DemoItemBinding.inflate(inflater, container, false)
            } else {
                val view = recycledViews.pop()
                val custBinding = DataBindingUtil.getBinding<DemoItemBinding>(view)
                if(custBinding == null)
                    DemoItemBinding.bind(view)
                else
                    custBinding
            }
        }

        override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) {
            val view = `object` as View

            container.removeView(view)
            recycledViews.add(view)
        }

        override fun isViewFromObject(view: View, `object`: Any): Boolean {
            return `object` is View && view.equals(`object`)
        }

        override fun getCount(): Int {
            return 4
        }
    }

return if (recycledViews.isEmpty()) {
            CustomBinding.inflate(inflater, container, false)
        } else {
            val view = recycledViews.pop()
            CustomBinding.bind(view)
        }

return if (recycledViews.isEmpty()) {
                DemoItemBinding.inflate(inflater, container, false)
            } else {
                val view = recycledViews.pop()
                val custBinding = DataBindingUtil.getBinding<DemoItemBinding>(view)
                if(custBinding == null)
                    DemoItemBinding.bind(view)
                else
                    custBinding
            }