How to run Background Service in Android Studio using Kotlin.
Last updated Dec 18, 2021 In this android example, we will see how to run a Background Service in Android Studio by using Kotlin Language.
Implementation:
Step 1: Create a new Project in android studio.
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Go to File > New > New Project > Empty Activity > Next > Enter Name > Select Language Kotlin > Finish
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Step 2: Go to activity_main.xml file and add the following code
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<?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"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="RRTUTORS"
android:textAlignment="center"
android:textColor="@color/purple_500"
android:textSize="32sp"
android:textStyle="bold" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Start Background Service"
android:textSize="16sp"
android:textStyle="bold" />
</RelativeLayout>
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Step 3: Create a new kotlin file.
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app > new > Kotlin File(Class) > Enter Name(MyService) > Enter
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Step 4: Open MyService.kt file and add the following code.
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class MyService : Service() {
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
onTaskRemoved(intent)
Toast.makeText(
applicationContext, "This is a Service running in Background",
Toast.LENGTH_SHORT
).show()
return START_STICKY
}
override fun onBind(intent: Intent): IBinder? {
// TODO: Return the communication channel to the service.
throw UnsupportedOperationException("Not yet implemented")
}
override fun onTaskRemoved(rootIntent: Intent) {
val restartServiceIntent = Intent(applicationContext, this.javaClass)
restartServiceIntent.setPackage(packageName)
startService(restartServiceIntent)
super.onTaskRemoved(rootIntent)
}
}
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Step 5: Add following code in AndroidManifest.xml file inside tag.
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<service
android:name=".MyService"
android:enabled="true"
android:exported="true" />
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Step 6: Open MainActivity.kt file and add the following code below setContentView(R.layout.activity_main).
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val button: Button = findViewById(R.id.button)
button.setOnClickListener {
startService(Intent(applicationContext, MyService::class.java))
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Step 7: Run the app on emulator or real device, you will get the output as following in video
Complete Source Code of Run Background Service Example
activity_main.xml file
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<?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"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="RRTUTORS"
android:textAlignment="center"
android:textColor="@color/purple_500"
android:textSize="32sp"
android:textStyle="bold" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Start Background Service"
android:textSize="16sp"
android:textStyle="bold" />
</RelativeLayout>
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MainActivity.kt file
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import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
class ServiceActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val button: Button = findViewById(R.id.button)
button.setOnClickListener {
startService(Intent(applicationContext, MyService::class.java)) }
}
}
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MyService.kt file
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import android.app.Service
import android.content.Intent
import android.os.IBinder
import android.widget.Toast
class MyService : Service() {
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
onTaskRemoved(intent)
Toast.makeText(
applicationContext, "This is a Service running in Background",
Toast.LENGTH_SHORT
).show()
return START_STICKY
}
override fun onBind(intent: Intent): IBinder? {
// TODO: Return the communication channel to the service.
throw UnsupportedOperationException("Not yet implemented")
}
override fun onTaskRemoved(rootIntent: Intent) {
val restartServiceIntent = Intent(applicationContext, this.javaClass)
restartServiceIntent.setPackage(packageName)
startService(restartServiceIntent)
super.onTaskRemoved(rootIntent)
}
}
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Conclusion: In this android example we have covered how to run a background service in Android Studio by using Kotlin Language.
<?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"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="RRTUTORS"
android:textAlignment="center"
android:textColor="@color/purple_500"
android:textSize="32sp"
android:textStyle="bold" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Start Background Service"
android:textSize="16sp"
android:textStyle="bold" />
</RelativeLayout>
MainActivity.kt file
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
class ServiceActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val button: Button = findViewById(R.id.button)
button.setOnClickListener {
startService(Intent(applicationContext, MyService::class.java)) }
}
}
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MyService.kt file
import android.app.Service
import android.content.Intent
import android.os.IBinder
import android.widget.Toast
class MyService : Service() {
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
onTaskRemoved(intent)
Toast.makeText(
applicationContext, "This is a Service running in Background",
Toast.LENGTH_SHORT
).show()
return START_STICKY
}
override fun onBind(intent: Intent): IBinder? {
// TODO: Return the communication channel to the service.
throw UnsupportedOperationException("Not yet implemented")
}
override fun onTaskRemoved(rootIntent: Intent) {
val restartServiceIntent = Intent(applicationContext, this.javaClass)
restartServiceIntent.setPackage(packageName)
startService(restartServiceIntent)
super.onTaskRemoved(rootIntent)
}
}
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Conclusion: In this android example we have covered how to run a background service in Android Studio by using Kotlin Language.
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