Service In Background android studio

assalamu'alaikum.

to day i show you. how to run app in background procces

lets do it

in the firs u can start a new project and create activity.java and layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout 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:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MenuAwal">
<Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="simpanexternal"android:onClick="strservice"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="bacaexternal"android:onClick="stopservice"/>
</LinearLayout>

now see in activity.java

public class Activity extends AppCompatActivity {

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);    setContentView(R.layout.layout);
    }
    public void strservice(){
       Intent intent=new Intent(this,ServiceBackground.class);       startService(intent);    }
    public void stopservice(){
       Intent intent=new Intent(this,ServiceBackground.class);       stopService(intent);    }

}

now create a new activity. java  but change the name with ServiceBackground.java

public class ServiceBackground extends Service {

    @Override    public void onCreate() {
       super.onCreate();    }
    @Nullable    @Override    public IBinder onBind(Intent intent) {
       return null;
    }
    @Override    public int onStartCommand(Intent intent, int flags, int startId) {
    Toast.makeText(this, "start service", Toast.LENGTH_SHORT).show();
    return START_STICKY;
    }
    @Nullable    @Override    public IBinder onBind(Intent intent) {
    return null;
    }
    @Override
    public void onDestroy() {
    Toast.makeText(this, "Service Destroy", Toast.LENGTH_SHORT).show();
    }
}

ok its finishing add configuration service in manifest file

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.blogspot.programer27android.downloadmode">

<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=".Activity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <service android:name=".ServiceBackground"            android:exported="false">        </service>    </application>
</manifest>

now you can try to run your projet..
thanks ..

enjoy your code