android - 如何在recyclerview中显示所有复选框?
问题描述
我想长按显示所有复选框,但只显示一个我的适配器有一部分
override fun onBindViewHolder(holder: ViewHoldder, position: Int) {
holder.textView?.text = lstWords[position].engWord
holder.textView2?.text = lstWords[position].transWord
holder.textView3?.text = lstWords[position].rusWord
holder.checkBox?.setOnCheckedChangeListener(object : CompoundButton.OnCheckedChangeListener {
override fun onCheckedChanged(buttonView: CompoundButton?, isChecked: Boolean) {
val word = Words(
lstWords[position].idWord!!,
lstWords[position].engWord!!,
lstWords[position].transWord!!,
lstWords[position].rusWord!!,
lstWords[position].check!!
)
if (holder.checkBox?.isChecked!!){
words.add(word.idWord.toString())
Log.d("MYTAG", "$words")
}
if (!holder.checkBox?.isChecked!!){
words.remove(word.idWord.toString())
Log.d("MYTAG", "$words")
}
}
})
holder.itemView.setOnLongClickListener {
holder.checkBox?.visibility = CheckBox.VISIBLE
true
}
}
如何更改所有复选框?
解决方案
使用适配器类中的属性来确定是否应显示复选框。调用notifyDataSetChanged()
强制所有项目视图被反弹,因此它将有机会修改它们中的每一个。
private var shouldShowCheckBoxes = false
//...
override fun onBindViewHolder(holder: ViewHoldder, position: Int) {
//...
holder.checkBox?.visiblility = if (shouldShowCheckBoxes) View.VISIBLE else View.INVISIBLE
holder.itemView.setOnLongClickListener {
shouldShowCheckBoxes = true
notifyDataSetChanged()
true
}
}