Bringing the activity to foreground

In my activity class i call start service and service works fine.In the service on the basis of some test i want to bring the activity in the foreground(the activity that start the service).What to write in the service class to开发者_高级运维 get the activity in foreground.I need it foreground because if user opens another application then my activity goes to background.Thanks in advance

you should use this when you start you activity intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);