问题
I want to make two android application that communicate each other using tcp in the same device itself .
Say when a user from Android A app. clicks a button it must bring Android app B to the front and show a message from Android A and when user clicks a button on Android B ( say processed finished ) it must get behind and Android A must come to the front of the display
How can this be done can it be done by tcp method or what exactly I must use for this
来源：https://stackoverflow.com/questions/52975645/i-want-to-android-app-a-to-communicate-to-android-app-b-using-tcp-method