简介android进行左右声道的切换，解决android系统mediaplayer的声道缺陷.-Introduction android switch for left and right channels to resolve the channel mediaplayer android system defects.

在android系统实现两个蓝牙设备的链接、通信。-In the android system to achieve two Bluetooth devices links and communications.

Android 城市便民通系统，包括日程管理，记事本管理，记账管理和联系人管理四大功能-Android City pass for the convenience of the system, including schedule management, Notepad management, account management and contact management functions of Android City pass for the convenience of the sy