Android Intercom
这个APP也可以，它利用蓝牙或者wifi来通信，但不需要路由器的哦，是两个手机之间就可以直接通信，不需要网络，不需要基站
Description
Android Intercom let you place group calls with other Android devices over Bluetooth and Wifi.
Android Intercom acts like a simple walkie talkie (two way radio):
·No Internet needed. It only uses local communications.
·Minimum configuration.
·No registration.
·No accounts.
·No buddy list.
Sometimes you can't talk directly to people around you:
·Motorbike communications. Rider-copilot. There are special headsets for all types of helmets.
·Inter vehicle communications (up to 100 meters / 238 feet). Motorbikes, cars, ...
·Sports (ski, cycling, hiking, climbing).
·Noisy environments (construction, concerts, etc.)
Remember, with Android Intercom you will not be charged and you will not waste data from your data plan.
Notes:
*Bluetooth headsets are supported on Android 2.2+ devices.
*We recommend specialized headsets for each use case, just find the one that fits you best.
