MainActivity.kt
package com.example.jetpack
import android.content.pm.PackageInfo
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.pm.PackageInfoCompat
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// get the package info instance
val packageInfo: PackageInfo = packageManager.getPackageInfo(packageName, 0)
// get this app version name programmatically
val versionName: String = packageInfo.versionName
// get this app version code programmatically
val versionCode: Long = PackageInfoCompat.getLongVersionCode(packageInfo)
// display the collected information in text view
textView.text = "Package Name: $packageName"
textView.append("\nVersion Name: $versionName")
textView.append("\nVersion Code : $versionCode")
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#E5E4E2"
tools:context=".MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="16dp"
android:fontFamily="sans-serif-condensed"
android:textColor="#191970"
android:textSize="25sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="TextView" />
</androidx.constraintlayout.widget.ConstraintLayout>

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