i 写入客户端- 服务器应用程序, 它使用 TCP 套接字连接。 在我和机器人项目中, Service 为收听 TCP 套接字创建一条线 。
似乎一切都很好。但我有一个问题。。 我的网络服务在背景上运行很好; 但过了一段时间( 10-15 分钟), 当我试图再次打开应用程序( 主要活动)时, 我无法从插座连接中得到回应。 它冻结了还是什么??? 我无法发送或从插座获得 TCP 信息。 原因是什么? 我正在通过 3G 连接在手机上工作 。
(此外,模拟器中运行的应用程序没有遇到这样的问题; 我猜它的连接是稳定的, 长期的 )
谢谢你的回答
由于电力优化,也许连通性(GPRS/HSDPA/Wifi)发生变化,你的连通极有可能被删除。
为了维持连接, 您的背景服务需要使用 PowerManager 类来申请锁住 。 这样可以防止设备进入节电模式, 从而切断您的插座 。 但请注意, 这会大大降低设备的电池使用寿命 。
另外,您还需要处理连接的变更,这些变更打破了您的开放式连接。Android发送了一个名为
仅当设备正在积极使用或只是使用 C2DM 推进通知时才建立连接
当我在应用程序中体验到这样的事情时,通常是因为手机上的电源优化(不能被覆盖 ) 。 如果插座闲置时间太长, 它会自动关闭, 需要重新开放 。
您不时发送数据吗? 比如执行心跳协议? 如果您不是, 您应该... 或者它可能与插座 READ/ WriteTimeOUT 有关 。
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