By clicking on a button, I can find the id of the button through findViewById(v.getId()). How can I replace it with View Binding?
This is my code:
fun TastoClick(v: View) {
val btn = findViewById(v.getId()) as Button
var name = btn.text.toString().toInt()
}
Please do give the documentation for View Binding a look I'm sure you will find it answers your question.
But in summary:
in the module-level build.gradle add:
android {
...
buildFeatures {
viewBinding true
}
}
For a Fragment with an xml like result_profile.xml a binding class will be generated in the format: ResultProfileBinding you will then need to setup an instance for that class as below:
result_profile.xml:
<LinearLayout ... >
<TextView android:id="@+id/name" />
<ImageView android:cropToPadding="true" />
<Button android:id="@+id/button"
android:background="@drawable/rounded_button" />
</LinearLayout>
ResultProfileFragment.kt:
private var _binding: ResultProfileBinding? = null
// This property is only valid between onCreateView and
// onDestroyView.
private val binding get() = _binding!!
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
_binding = ResultProfileBinding.inflate(inflater, container, false)
val view = binding.root
return view
}
override fun onDestroyView() {
super.onDestroyView()
_binding = null
}
ResultProfileActivity.kt:
private lateinit var binding: ResultProfileBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ResultProfileBinding.inflate(layoutInflater)
val view = binding.root
setContentView(view)
}
You can then access the layout elements like this:
binding.name.text = viewModel.name
binding.button.setOnClickListener { viewModel.userClicked() }
Update:
If you have one listener for multiple buttons you can simple compare the view passed into the onClick method with your view bindings id i.e.
v.id == binding.yourbutton.id
A switch statement or if statement may be used to check which id matches the view that was clicked.