Android Kotlin ImageView内置于Kotlin ImageView中.适配器未按预期更新

问题出在专用功能setIcon中. 您需要使用每个ActuatorDeviceInfo更新每个项目的视图. 您需要使用项目视图的绑定来设置数据和图像.

Bind()中的for语句使用每个项的绑定. 但是SETIcon使用了一些其他绑定，该绑定具有上次初始化的视图，而根据您的要求，它不应该这样做.

解

1. 删除变量private lateinit var binding: AdapterActuatorBinding.
2. 在onCreateViewHolder函数中将局部变量绑定声明为val binding = .
3. 将私有的SETIcon函数移动到ViewHolder类.

以上1、2步为可选步骤.

结果

class ActuatorDeviceInfoAdapter(
    val ctx: FragmentActivity,
    var itemLst: MutableList<ActuatorDeviceInfo>,
    val showToggle: Boolean
) : RecyclerView.Adapter<ActuatorDeviceInfoAdapter.ViewHolder>() {
    // 1. Removed
    // private lateinit var binding: AdapterActuatorBinding
    var onItemClick: ((ActuatorDeviceInfo) -> Unit)? = null
    var onToggleClick: ((ActuatorDeviceInfo, Boolean, AdapterActuatorBinding) -> Unit)? = null

    override fun onCreateViewHolder(
        parent: ViewGroup,
        viewType: Int
    ): ActuatorDeviceInfoAdapter.ViewHolder {
        // 2. Declared
        val binding = AdapterActuatorBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return ViewHolder(binding)
    }

    override fun onBindViewHolder(holder: ActuatorDeviceInfoAdapter.ViewHolder, position: Int) {
        val pic = itemLst[position]
        holder.bind(pic)
    }

    override fun getItemCount(): Int = itemLst.size

    inner class ViewHolder(private val binding: AdapterActuatorBinding) :
        RecyclerView.ViewHolder(binding.root) {

        fun bind(actuatorDeviceInfo: ActuatorDeviceInfo) {
            binding.actuatorDevInfo = actuatorDeviceInfo

            if (showToggle) {
                binding.tglStatus.visibility = View.VISIBLE
                binding.tglStatus.isChecked = actuatorDeviceInfo.status
            } else {
                binding.tglStatus.visibility = View.GONE
            }

            setIcon(actuatorDeviceInfo.type!!)
        }
        // 3. Moved
        private fun setIcon(type: ActuatorType) {
            val iconPath = "${Utils.instance.getServerHost(ctx)}${type.iconPath}"
            binding.imgIcon.load(iconPath)
        }

        init {
            itemView.setOnClickListener {
                onItemClick?.invoke(itemLst[adapterPosition])
            }
            binding.tglStatus.setOnClickListener {
                onToggleClick?.invoke(itemLst[adapterPosition], binding.tglStatus.isChecked, binding)
            }
        }
    }

    

    companion object{
        const val TAG = "ActuatorDeviceInfoAdapter"
    }
}

您可以通过遵循最佳实践来避免此类问题.

• 不要在嵌套块或内部类中声明相同的变量名(变量隐藏)