Android Layout with Kotlin Databinding

Pre-Request

Activatate Databinding

Enable Databinding in build.gradle file that app part inside android{} tag

dataBinding {
    enabled = true
}

After That Sync your app

Basic Viewbinding

Layout Compatible

if you using linear layout add layout <layout> .... linear layout ..... </layout> over there and move layout name space like xmlns:android="......" to this layout and Build your App

Programing

go to MainActivity.kt or other program file

Active Binding Variable using lateinit that is predefine without value initial like
```
  private lateinit var binding: ActivityMainBinding
```
Set Content View Using Data Binding everything using the attribute of variable that have define in the previous step
```
  binding = DataBindingUtil.setContentView(this,R.layout.activity_main)
```

this tell you that ‘this activity’ and R.layout.activity_main show that layout that you want to bind or showing

Databinding will generate A Specific Variable Name of Attribute like nickname_show to nicknameShow using Camel Case that automatically making by an IDE

Activity Recieving

Using Binding Variable in this code using bind in syntax using dot method like
```
  binding.doneButton.setOnClickListener {
          addNickname(it)
      }
```
it in Kotlin like this in Java to call compiler that I want to make function on this class ### Managing Activity

Using Binding Variable and dot syntax like

  binding.nicknameShow.text = binding.nicknameInput.text

Using binding.apply{...} to easy managing code (binding is Binding Variable)
Using invalidateAll() to invaluate data (Get new data) when Refresh UI

Example on this program

   binding.apply {
          binding.nicknameShow.text = binding.nicknameInput.text
          invalidateAll() /* to invaluate data (Get new data) when Refresh UI */
          binding.nicknameInput.visibility = View.GONE
          binding.doneButton.visibility = View.GONE
          binding.nicknameShow.visibility = View.VISIBLE
      }

Using Attribute As same as using findViewById

Recommended Data-Binding

Using Data Class (in Another Kotlin File) for keep the object type variable like the stuct in C or can use any class instead of data class
Link The Layout to that class
```
  <data>
      <variable name="myName" type="com.example.aboutme.MyName"/>
  </data>
```
The name of the variable you can define but link to your data class or Any structure class.