Add Bluetooth service to Android-Multibluetooth-Library

[reixd]

This changes extend the library functionality to also support Android Services to host the Bluetooth handling code.

• The Bluetooth manager was extended to support Activities and Services:
  • add extra constructor
  • add extra variable for Service object
  • handle actions according to which object is defined: service or activity
  • adapt notification code to also handle services
• Add activity to help the service to start an activity for result to make the Bluetooth device discoverable. This is sort of a workaround, because services cannot start activities and wait for results.
• Modify the android manifest to reflect the needed changes.
• Missing: report back to application that discovery was initialized.

Add example module "BluetoothService_sample" with an Activity and Service to demonstrate how to program and use the introduced Bluetooth Service in the lib.

• Just compile the sample and start the main activity.
• Click on the button to start the service

Tested with AndroidStudio 141.2024585 and Samsung GT-P7320 Android 4.1.2 (API v16)

[arissa34]

Thanks for your work.

[arissa34]

I think you missed to add the file EnableBluetoothDiscoveryActivity.class into the lib.

[reixd]

The file was added in my pull request. When I search the pull request with the String "EnableBluetoothDiscoveryActivity" I find a file with that name that is added by a commit.

See https://github.com/arissa34/Android-Multi-Bluetooth-Library/blob/025a5713f47e77c3a2a769382b7188ee9248228a/Bluetooth/Bluetooth_lib/src/main/java/com/ramimartin/multibluetooth/activity/EnableBluetoothDiscoveryActivity.java