我的活动中有一些文本字段和一个recyclerview。我需要从回收者视图适配器类访问文本字段值，并从适配器类访问活动中的方法。但是我不能使用Kotlin来做同样的事情来帮助我解决这个问题
活动
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_addstaff)
try {
sprefs = this!!.getSharedPreferences(
Config.PACKAGE_NAME, Context.MODE_PRIVATE)
token = sprefs!!.getString("token", "No")!!
} catch (e: Exception) {
}
try {
layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
outletnameslistrecycle!!.layoutManager = layoutManager
Outnameslist = ArrayList()
adapter = outletname_adapter(Outnameslist as ArrayList<Outletnamelist>, this,btneditstaff as Button)
outletnameslistrecycle!!.adapter = adapter
getoutletlist();
} catch (e: Exception) {
e.printStackTrace()
}
}
Adapterclass
class outletname_adapter(internal var Outnamelist: List<Outletnamelist>, private val context: Context, val button: Button) : RecyclerView.Adapter<outletname_adapter.ViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
try {
val v = LayoutInflater.from(parent.context)
.inflate(R.layout.lay_outletnamelist, parent, false)
return ViewHolder(v, context, Outnamelist)
} catch (e: Exception) {
e.printStackTrace()
}
return null!!
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
try {
button.setOnClickListener {
}
var OutletList =Outnamelist[position]
holder.outlet_name!!.text=OutletList.name
} catch (e: Exception) {
e.printStackTrace()
}
}
override fun getItemCount(): Int {
return Outnamelist.size
}
inner class ViewHolder(v: View, var context: Context, private val outnamelist: List<Outletnamelist>)
: RecyclerView.ViewHolder(v), View.OnClickListener {
var outlet_checkbox: CheckBox? = null
var outlet_name: TextView?=null
var layTop: LinearLayout?= null
init {
itemView.setOnClickListener(this)
try {
outlet_checkbox=v.findViewById<View>(R.id.checkBox) as CheckBox
outlet_name=v.findViewById<View>(R.id.txt_in)as TextView
} catch (e: Exception) {
e.printStackTrace()
}
}
override fun onClick(v: View) {
val position = adapterPosition
}
}
}
XML`
<ScrollView xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/diagonal_bg"
tools:context=".Activity_addstaff">
<de.hdodenhof.circleimageview.CircleImageView xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/img_staff"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginStart="30dp"
android:layout_marginTop="137dp"
android:src="@drawable/subadmin"
app:civ_border_color="#ffffff"
app:civ_border_width="2dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="1dp"
android:paddingRight="1dp"
android:layout_marginTop="250dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:animateLayoutChanges="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:animateLayoutChanges="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/staffname_text_input"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:id="@+id/staffname_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/label_staffname" />
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:animateLayoutChanges="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/staffaddress_text_input"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:id="@+id/staffaddress_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/label_address" />
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:animateLayoutChanges="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/staffplace_text_input"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:id="@+id/staffplace_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/label_place" />
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:animateLayoutChanges="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/staffpin_text_input"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:id="@+id/staffpin_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/label_pin" />
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:animateLayoutChanges="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/staffmob_text_input"
style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TextInputEditText
android:id="@+id/staffmob_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/label_mob"
/>
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/lay_root"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">
<LinearLayout
android:id="@+id/lay_root2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/outletnameslistrecycle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="1dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:orientation="horizontal"
android:padding="20dp">
<Button
android:id="@+id/btneditstaff"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:layout_gravity="center"
android:layout_marginEnd="5dp"
style="@style/DefaultButton"
android:background="@drawable/btn_border"
android:foreground="?attr/selectableItemBackground"
android:text="Save"
android:textAllCaps="false"
android:textColor="@color/white" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
从活动中，我已经将按钮引用传递给了适配器类，但是与尝试传递文本字段引用时遇到错误的方式相同。
您可以通过这种方式在适配器中访问活动方法或其他方法：
if(context is XXXActivity){
context.xxx()
context.xx
}
但是这不是很好的代码。您可以尝试以下两种方法：
class outletname_adapter(internal var Outnamelist: List<Outletnamelist>, private val context: Context, val button: Button , val xxxtextProvider:()->String={""}/*it return the data you need*/ ) : RecyclerView.Adapter<outletname_adapter.ViewHolder>() {
...
}