Mar*_*eer 2 android android-edittext kotlin android-recyclerview
我有一个 RecyclerView,其中包含带有 EditText 字段的视图列表。
我希望能够更改 EditTexts 中的值并更新我的数据集。我似乎正在完成此任务,但是当我向列表中添加新项目时,EditText 中的值会混淆。
我找不到为什么会发生这种情况。有什么想法吗?
主要活动
class MainActivity : AppCompatActivity() {
private lateinit var recyclerView: RecyclerView
private lateinit var viewAdapter: RecyclerView.Adapter<*>
private lateinit var viewManager: RecyclerView.LayoutManager
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val myDataSet = ArrayList<Person>()
myDataSet.add(Person("Tommy"))
myDataSet.add(Person("John"))
myDataSet.add(Person("Suzie"))
myDataSet.add(Person("Leslie"))
viewManager = LinearLayoutManager(this)
viewAdapter = PersonAdapter(myDataSet)
recyclerView = findViewById<RecyclerView>(R.id.rvPersons).apply {
setHasFixedSize(true)
layoutManager = viewManager
adapter = viewAdapter
}
val button = findViewById<Button>(R.id.myButton)
button.setOnClickListener {
myDataSet.add(Person("new person"))
myDataSet.forEach {person ->
Log.i("my-tag", person.name)
}
rvPersons.adapter?.notifyDataSetChanged()
}
}
}
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人员适配器
class PersonAdapter(private val myDataSet: ArrayList<Person>) :
RecyclerView.Adapter<PersonAdapter.MyViewHolder>() {
class MyViewHolder(view: View) : RecyclerView.ViewHolder(view) {
val editText: EditText = view.my_edittext
var textView: TextView = view.my_textView
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
return MyViewHolder(
LayoutInflater.from(parent.context)
.inflate(R.layout.item_person, parent, false)
)
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
holder.editText.setText(myDataSet[position].name)
holder.editText.doAfterTextChanged { text ->
if (!text.isNullOrBlank()) {
myDataSet[position].name = text.toString()
}
}
holder.textView.text = myDataSet[position].name
}
override fun getItemCount(): Int = myDataSet.size
}
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小智 7
对于回收者视图回收问题:- 添加此
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
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