refact: remove deprecated kotlin-android-extension

Author: aallam

app/build.gradle

@@ -1,6 +1,5 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion sdkCompile
@@ -21,6 +20,9 @@ android {
     sourceSets {
         main.java.srcDirs += "src/main/kotlin"
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {

app/src/main/kotlin/com/algolia/instantsearch/voice/demo/MainActivity.kt

@@ -4,15 +4,13 @@ import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import android.view.View
 import com.algolia.instantsearch.voice.VoiceSpeechRecognizer
+import com.algolia.instantsearch.voice.demo.databinding.MainBinding
 import com.algolia.instantsearch.voice.ui.Voice
 import com.algolia.instantsearch.voice.ui.Voice.isRecordAudioPermissionGranted
 import com.algolia.instantsearch.voice.ui.Voice.shouldExplainPermission
 import com.algolia.instantsearch.voice.ui.Voice.showPermissionRationale
 import com.algolia.instantsearch.voice.ui.VoiceInputDialogFragment
 import com.algolia.instantsearch.voice.ui.VoicePermissionDialogFragment
-import kotlinx.android.synthetic.main.main.*
-import kotlinx.android.synthetic.main.main.view.*
-
 
 class MainActivity : AppCompatActivity(), VoiceSpeechRecognizer.ResultsListener {
 
@@ -21,28 +19,36 @@ class MainActivity : AppCompatActivity(), VoiceSpeechRecognizer.ResultsListener
         Voice
     }
 
+    private lateinit var binding: MainBinding
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.main)
+        binding = MainBinding.inflate(layoutInflater)
+        val view = binding.root
+        setContentView(view)
 
-        main.buttonVoice.setOnClickListener { _ ->
+        binding.buttonVoice.setOnClickListener { _ ->
             if (!isRecordAudioPermissionGranted()) {
                 VoicePermissionDialogFragment().show(supportFragmentManager, Tag.Permission.name)
             } else {
                 showVoiceDialog()
             }
         }
 
-        main.buttonPermission.setOnClickListener {
+        binding.buttonPermission.setOnClickListener {
             VoicePermissionDialogFragment().show(supportFragmentManager, Tag.Permission.name)
         }
     }
 
     override fun onResults(possibleTexts: Array<out String>) {
-        main.results.text = possibleTexts.firstOrNull()?.capitalize()
+        binding.results.text = possibleTexts.firstOrNull()?.capitalize()
     }
 
-    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray
+    ) {
         super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         if (Voice.isRecordPermissionWithResults(requestCode, grantResults)) {
             when {
@@ -64,10 +70,12 @@ class MainActivity : AppCompatActivity(), VoiceSpeechRecognizer.ResultsListener
         }
     }
 
-    private fun getVoiceDialog() = (supportFragmentManager.findFragmentByTag(Tag.Voice.name) as? VoiceInputDialogFragment)
-
-    private fun getPermissionDialog() = (supportFragmentManager.findFragmentByTag(Tag.Permission.name) as? VoicePermissionDialogFragment)
+    private fun getVoiceDialog() =
+        (supportFragmentManager.findFragmentByTag(Tag.Voice.name) as? VoiceInputDialogFragment)
 
-    private fun getPermissionView(): View = getPermissionDialog()!!.view!!.findViewById(R.id.positive)
+    private fun getPermissionDialog() =
+        (supportFragmentManager.findFragmentByTag(Tag.Permission.name) as? VoicePermissionDialogFragment)
 
+    private fun getPermissionView(): View =
+        getPermissionDialog()!!.view!!.findViewById(R.id.positive)
 }

voice/src/main/kotlin/com/algolia/instantsearch/voice/ui/VoiceAndroidView.kt

@@ -15,13 +15,13 @@ class VoiceAndroidView(
     private val context = view.context
     private val voiceInput: ConstraintLayout get() = view.findViewById(R.id.voiceInput)
     private val suggestionsView: TextView? get() = view.findViewById(R.id.voiceInput)
-    private val ConstraintLayout.close: ImageView get() = findViewById(R.id.close)
-    private val ConstraintLayout.microphone: VoiceMicrophone get() = findViewById(R.id.microphone)
-    private val ConstraintLayout.title: TextView get() = findViewById(R.id.microphone)
-    private val ConstraintLayout.subtitle: TextView get() = findViewById(R.id.subtitle)
-    private val ConstraintLayout.suggestions: TextView? get() = findViewById(R.id.suggestions)
-    private val ConstraintLayout.hint: TextView get() = findViewById(R.id.hint)
-    private val ConstraintLayout.ripple: RippleView get() = findViewById(R.id.ripple)
+    private val View.close: ImageView get() = findViewById(R.id.close)
+    private val View.microphone: VoiceMicrophone get() = findViewById(R.id.microphone)
+    private val View.title: TextView get() = findViewById(R.id.microphone)
+    private val View.subtitle: TextView get() = findViewById(R.id.subtitle)
+    private val View.suggestions: TextView? get() = findViewById(R.id.suggestions)
+    private val View.hint: TextView get() = findViewById(R.id.hint)
+    private val View.ripple: RippleView get() = findViewById(R.id.ripple)
 
     override val formatterSuggestion = { suggestion: String ->
         context.getString(