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[android]data binding 2 - BindingAdapter example EditText 본문
databinding send view & BindingAdapter
ViewModel
class ViewModel() : ViewModel() {
//If want update view data then use LiveData
//EditText support String simple
private val _text = MutableLiveData(String)
val data: LiveData = _text
//EditText not support Int Type need BindingAdapter
private val _num = MutableLiveData(String)
val num: LiveData = _num
layout
<data>
<variable
name="viewmodel"
type="com.test.name.ViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
...
//simple '{data}'
<EditText
android:text='@{viewmodel.text}'
/>
//need BindingAdapter Int
<EditText
android:text='@{viewmodel.num}'
/>
BindingAdapter
object EditTextDataBindingAdapter{
//EditText Int Type BindingAdapter
//need to static
@JvmStatic
//binding target "android:text"
@BindingAdapter("android:text")
// function name is user define
fun setText(view: TextView, text: Int)
{
view.text = text.toString()
}
}
[android]data binding 3 - Two-way data binding & BindingAdapter example EditText
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