首先，从4月30日，您将不再能够获取全部的用户朋友们的图形API的1.0版本将是德precated和2.0版将成为API的当前版本。更多关于版本可以发现这里。

First off from the 30th of April you will no longer be able to fetch all a users friends as version 1.0 of the Graph API will be deprecated and v2.0 will become the current version of the API. More on versioning can be found here.

至于大家介绍一下在Android上发送消息的实际问题，这是目前无法通过Android SDK

As for you actual question about sending messages on Android this is not currently possible via the Android SDK