如何从 RecyclerView 的所有项目视图中清除 EditText 输入？

Question

我正在寻找解决方案来迭代我的 Recycler View Adapter 元素的所有视图以获取 EditTexts 并更改输入。

我使用 RecyclerView 列表。项目行包含 EditText。当用户单击一个按钮时，我想清除所有项目视图的输入，即使是那些尚未绑定的。我该怎么做？

class ScoresAdapter : RecyclerView.Adapter<ScoresViewHolder>() {

private var scores: List<Score> = ArrayList()
private var listener: ScoreItemListener? = null

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ScoresViewHolder {
    val view =
        LayoutInflater
            .from(parent.context)
            .inflate(R.layout.score_item, parent, false)

    return ScoresViewHolder(view)
}

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

override fun onBindViewHolder(holder: ScoresViewHolder, position: Int) {
    val score = scores[position]

    holder.playerView.text = score.player.email
    holder.totalScoreView.text = score.total().toString()
}

fun setItemListener(listener: ScoreItemListener) {
    this.listener = listener
}

fun loadScores(scores: ArrayList<Score>) {
    this.scores = scores
    notifyDataSetChanged()
}

fun clearInputs() {
    // for all scores in list remove text from EditText and set ""
}

inner class ScoresViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    var playerView = itemView.findViewById<TextView>(R.id.player)!!
    var currentScoreView = itemView.findViewById<EditText>(R.id.current_score)!!
    var totalScoreView = itemView.findViewById<TextView>(R.id.total_score)!!

    init {
        setTextChangedListener(itemView)
    }

    private fun setTextChangedListener(itemView: View) {
        if (listener != null)
            currentScoreView.addTextChangedListener(object : TextWatcher {
                override fun afterTextChanged(s: Editable?) {

                }

                override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {

                }

                override fun onTextChanged(text: CharSequence?, start: Int, before: Int, count: Int) {
                    listener!!.textChanged(itemView, text!!.toString(), adapterPosition)
                }

            })
    }
}
}

Answer 1

您可以执行以下操作::

var clearEditText = false

override fun onBindViewHolder(holder: ScoresViewHolder, position: Int) {
    val score = scores[position]

    holder.playerView.text = if(clearEditText) "" else score.player.email
    holder.totalScoreView.text = score.total().toString()
}


fun clearInputs() {
    clearEditText = true
    notifyDataSetChanged();
}

Answer 2

我知道您稍后可能需要将EditText 输入保存为currentScore 到Score。

假设这个和currentScore 为String。

在java中：

public void clearInputs() {
 for(Score score: scores) {
  score.currentScore = "";
 }
 notifyDataSetChanged();
}

在 Kotlin 中：

fun clearInputs() {
  for (score in scores)
  {
    score.currentScore = ""
  }
  notifyDataSetChanged()
}

Answer 3

试试这个可能有用

override fun onBindViewHolder(holder: ScoresViewHolder, position: Int) {
    val score = scores[position]

    holder.playerView.text = if(clearEditText) "" else score.player.email
    holder.totalScoreView.text = score.total().toString()
    holder.currentScoreView.setText("")
}

public void clearInputs() {
 notifyDataSetChanged();
}