Chip Group 侦听器在片段重新创建时更改芯片位置

Question

我正在以编程方式创建芯片。筹码已创建，但当应用程序停止 （未销毁） 并重新打开时，筹码在筹码组侦听器中的位置发生变化。

这是我的代码：

private lateinit var playlist: Array<Pair<String, String>>

override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
for (item in playlist){
    createChip(item.first)
}}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
chip_group.setOnCheckedChangeListener { chipGroup, position ->
    for (i in 0 until chipGroup.childCount){
        val chip = chipGroup.getChildAt(i)
        chip.isClickable = chip.id != chipGroup.checkedChipId
    }
    Toast.makeText(context, position.toString(), Toast.LENGTH_SHORT).show()
}}

fun createChip(name: String){
    val chip = Chip(chip_group.context)
    chip.text = name
    chip.isClickable = true
    chip.isCheckable = true
    chip.isCheckedIconVisible = false
    chip_group.addView(chip)
}

我希望芯片在应用程序重新打开时具有相同的位置，但位置反而增加了。

Answer 1

您正在将 id 与 position 混合使用。
onCheckedChanged(ChipGroup group, int checkedId)是检查芯片发生变化时调用的接口方法

override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
var index=0
for (item in playlist){
    createChip(item.first,index++)
}}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
chip_group.setOnCheckedChangeListener { chipGroup, id ->
    for (i in 0 until chipGroup.childCount){
        val chip = chipGroup.getChildAt(i)
        chip.isClickable = chip.id != chipGroup.checkedChipId
    }
    Toast.makeText(context, position.toString(), Toast.LENGTH_SHORT).show()
}}

fun createChip(name: String,index:Int){
    val chip = Chip(chip_group.context)
    chip.text = name
    chip.isClickable = true
    chip.isCheckable = true
    chip.isCheckedIconVisible = false
    chip.id=index //maybe you can use tag
    chip_group.addView(chip)
}

Chip Group 侦听器在片段重新创建时更改芯片位置

Chip Group listener change chip position when fragment recreate

android

kotlin

fragment

android-chips