Host Application
As stated previously an "Android Service" is always packaged as part of a host application which manages or makes use of the service. That application will reference System.Android.Service library to interact with the service.
Attaching the Service
First build the service then in the host application select the Android target platform. On the Android target platform, right-click and select Add Android Service.
Starting The Service
The TLocalServiceConnection/TRemoteServiceConnection class functions
• StartService(const AServiceName: string);
• StartJobIntentService(const AServiceName: string; AJobID: Integer = 1; const AIntent: JIntent = nil);
can be used to launch a service that then controls its own destiny.
If you wish to interact with the service you create and hold an instance of a connection object and populate the call backs.
• OnConnected
• OnDisconnected
or use procedures
• BindService
• UnbindService
Call Backs (From TLocalServiceConnection)
ServiceConnected(const LocalService: TAndroidBaseService);
Called when the connection between the native activity and the service has been established. It is used to obtain the
binder object that allows the direct interaction between the native activity and the service.
A pointer to the Service Datamodule is made available in the call back.
It can be type cast using FDMService := TSrvDM(ALocalService);
but I had trouble using FDMService := ALocalService as TSrvDM;
ServiceDisconnected;
Called when the connection between the native activity and the service has been unexpectedly lost (e.g. when the user
manually stops the service using the 'Settings' application).
Wake lock permission
WAKE_LOCK
JStringToString
(TJManifest_permission.JavaClass.ACCESS_FINE_LOCATION);
https://developer.android.com/training/scheduling/wakelock
PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
"MyApp::MyWakelockTag");
wakeLock.acquire();
TAndroidHelper.Activity.bindService(LIntent, FConnection, AFlags);
