update bug #84: switch read activity requests to v2 api
update bug #84: switch read activity requests to v2 api

PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile,PowerlineApp/powerline-mobile