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How to detect Android user agent type in general using kotlin?
This example demonstrates how to detect Android user agent type in general using Kotlin.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp" tools:context=".MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="50dp" android:text="Tutorials Point" android:textAlignment="center" android:textColor="@android:color/holo_green_dark" android:textSize="32sp" android:textStyle="bold" /> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="Detect Android user agent type in general" android:textAlignment="center" android:textColor="@android:color/holo_red_dark" android:textSize="24sp" android:textStyle="bold" /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.content.Context
import android.media.AudioManager
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import java.util.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
title = "KotlinApp"
val am = getSystemService(Context.AUDIO_SERVICE) as AudioManager
when (Objects.requireNonNull(am).ringerMode) {
AudioManager.RINGER_MODE_SILENT -> Toast.makeText(
this@MainActivity,
"Silent Mode",
Toast.LENGTH_SHORT
).show()
AudioManager.RINGER_MODE_VIBRATE -> Toast.makeText(
this@MainActivity,
"Vibrate Mode",
Toast.LENGTH_SHORT
).show()
AudioManager.RINGER_MODE_NORMAL -> Toast.makeText(
this@MainActivity,
"Normal Mode",
Toast.LENGTH_SHORT
).show()
}
}
}Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.q11"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run 
icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen
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