1-) Android Yeni -  servis

AndroidManifest.xml

<application>
...
<service android:name=".HelloService" android:exported="true"  android:launchMode="singleTop" android:process=":my_process"  >
</service>
<receiver
         android:name=".BootNotificationReceiver"
         android:enabled="true"
         android:exported="true"
         android:label="BootNotificationReceiver">
         <intent-filter>
             <action android:name="android.intent.action.BOOT_COMPLETED" />
         </intent-filter>
     </receiver>
</application>

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servis
https://gelecegiyazanlar.turkcell.com.tr/konu/android/egitim/android-401/android-servisler

önemli
http://mobilecoder.net/android-servis-kullanimi/

https://www.mobilhanem.com/android-service-kullanimi-ve-service-httppost-notificaton/

http://androidce.blogspot.com.tr/2012/06/android-programlama-xix-servis-kullanm.html

kendi
https://developer.android.com/guide/components/services.html