binding add

.idea/misc.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="app/src/main/res/layout/activity_main.xml" value="0.22" />
+      </map>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="Android Studio default JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>

app/build.gradle

@@ -29,6 +29,9 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    buildFeatures{
+        viewBinding true
+    }
 }
 
 dependencies {

app/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="uz.ssd.mobiuz">
 
+    <uses-permission android:name="android.permission.CALL_PHONE"/>
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

app/src/main/java/uz/ssd/mobiuz/MainActivity.kt

 package uz.ssd.mobiuz
 
+import android.content.Intent
+import android.net.Uri
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import uz.ssd.mobiuz.databinding.ActivityMainBinding
+import java.lang.NullPointerException
 
 class MainActivity : AppCompatActivity() {
+    private var _bn: ActivityMainBinding? = null
+    private val bn get() = _bn ?: throw NullPointerException("cannot inflate")
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        _bn = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(bn.root)
+        bn.button.setOnClickListener {
+            val intent = Intent(Intent.ACTION_CALL)
+//            intent.data = Uri.parse(Uri.parse("tel:" + "211")  Uri.encode("#"))
+            startActivity(intent)
+        }
+
+    }
+
+    override fun onDestroy() {
+        _bn = null
+        super.onDestroy()
     }
 }
\ No newline at end of file

app/src/main/res/layout/activity_main.xml

@@ -6,10 +6,12 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello World!"
+        android:id="@+id/button"
+        android:paddingHorizontal="20dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"