I want to set an event listener that dynamically outputs the text of the textview to the textview included in the linearLayout. But I can’t access the text property.
kotlin file
package com.jym.qb
class PrintActivity : AppCompatActivity() {
class PrintActivity : AppCompatActivity() {
private val vBinding by lazy { ActivityPrintBinding.inflate(layoutInflater)}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(vBinding.root)
for(item in vBinding.optionLayout.children){
item.setOnClickListener{
Log.d("test", it.toString())
}
}
}
}
layout File
<LinearLayout
android:id="@+id/optionLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/option0"
tools:text="option0" />
<TextView
android:id="@+id/option1"
tools:text="option1" />
<TextView
android:id="@+id/option2"
tools:text="option2" />
</LinearLayout>
>Solution :
Because the children are View (optionLayout.children), not a TextView, you have to cast:
for(item in vBinding.optionLayout.children){
if (item is TextView) {
item.setOnClickListener{
Log.d("test", it.text)
}
}
}
In this case you know for sure the children’s are View but the method getChildren() from a ViewGroup returns a list of all the child as a generic View