MainActivity.kt
package com.example.jetpack
import android.os.Build
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
textView.text = "Device OS Details"
// base OS build the product is based on
textView.append("\n\nBase OS: ${Build.VERSION.BASE_OS}")
// current development codename, or the string "REL"
// if this is a release build
textView.append("\nCodeName: ${Build.VERSION.CODENAME}")
// internal value used by the underlying source
// control to represent this build
textView.append("\nIncremental: ${Build.VERSION.INCREMENTAL}")
// developer preview revision of a pre-release sdk
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
textView.append("\nPreview SDK Int: ${Build.VERSION.PREVIEW_SDK_INT}")
}
// user-visible version string.
textView.append("\nRelease: ${Build.VERSION.RELEASE}")
// version string show to the user; may be RELEASE or
// CODENAME if not a final release build
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
textView.append("\nRelease Or CodeName: " +
"${Build.VERSION.RELEASE_OR_CODENAME}")
}
// user-visible security patch level
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
textView.append("\nSecurity Patch: ${Build.VERSION.SECURITY_PATCH}")
}
// sdk version of the software currently running on this hardware device
textView.append("\n\nSDK Int (API Level): ${Build.VERSION.SDK_INT}")
}
}
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="30sp"
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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