如何在Android Studio中添加一个Onke侦听器RecyclerView与静态编程语言？

Question

所以，我想有一个onclicklistener为我的回收视图在Android中，但我不知道我应该怎么做。

我有一个CustomAdapterClass用于我的Workoutlist，看起来像这样：

class CustomAdapter(val workoutList: ArrayList<workout>) : RecyclerView.Adapter<CustomAdapter.ViewHolder>() {

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomAdapter.ViewHolder {
    val v = LayoutInflater.from(parent.context).inflate(R.layout.list_layout, parent, false)
    return ViewHolder(v)
}

override fun onBindViewHolder(holder: CustomAdapter.ViewHolder, position: Int) {
    holder.bindItems(workoutList[position])
}

override fun getItemCount(): Int {
    return workoutList.size
}

class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

    fun bindItems(workout: workout) {
        val cardDate = itemView.findViewById<TextView>(R.id.cardDate)
        val cardDescription  = itemView.findViewById<TextView>(R.id.cardDescription)
        cardDate.text = workout.date
        cardDescription.text = workout.description
    }
}
}

我把我的锻炼像这样推进（在我的主要活动中）：

    val recyclerView = findViewById<RecyclerView>(R.id.RecyclerView)

    recyclerView.layoutManager = GridLayoutManager(this, 3)


    val workouts = ArrayList<workout>()

    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))
    workouts.add(workout("12.09.2018", "Kniebeugen und Bizeps + Rücken"))

    val adapter = CustomAdapter(workouts)

    recyclerView.adapter = adapter

我想让我的锻炼可以点击，这样我就可以使用锻炼的名称和描述来打开一个新的活动，并以此为目的。

感谢您的帮助！

我不明白他把分机放在“副本”里的地方

Answer 1

好了，伙计们，我发现了如何在Kotlin中实现onclicklistener，下面是链接：https://gist.github.com/nesquena/231e356f372f214c4fe6

Answer 2

在视窗内使用它

  override fun onClick(view: View) {

    }

如果你有特定的身份证

@OnClick(R.id.id1, R.id.id2)
 fun onClick(view: View) {
        when (view.id) {

            R.id.id1 -> {}
            R.id.id2 -> {}
            else ->{}
       }
}

Answer 3

>

让我们为这个用例定义一个接口：

interface WorkoutClickLisetner{
   fun onWorkoutClicked(workout: workout)
}

将WorkoutClickListener添加为CustomAdapter

var listener : WorkoutClickListener? = null

在bindItem方法中注册itemView的单击侦听器

itemView.listener = object : View.OnClickListener {

  override fun onClick(v: View){
    listener?.onWorkoutClicked(workout)
  }
}

不要忘记初始化您的WorkoutClickListener，当用户单击单元格时，您将在其中委托操作：

val adapter = CustomAdapter(workouts)

adapter.listener = object : WorkoutClickListener { 
    override fun onWorkoutClicked(workout: workout){  
   /*your delegation goes here*/`
 }
}

recyclerView.adapter = adapter