用于扫描 RF 来拦截手机呼叫的 Android 应用程序
我正在阅读以下文章，我了解到 RF（射频）信号是连接手机通话之间的通信媒介。
我想到了一个想法，那就是开发一款 Android 应用程序类型的射频扫描仪，它可以秘密窃听你周围的手机对话。
我知道我需要更多的研究，但我很快想知道 Android 应用程序是否可行？
I was reading following article and I come up to know about RF(Radio frequency) signals are the medium of communication between connect mobile phone calls.
Idea came in my mind to have android app kind of RF scanner which secretly eavesdrop on mobile phone conversations around you.
I know i need more research but i quickly want to know if it is possible with android apps or not ?
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Android 不提供 API 来执行此操作。它们被隐藏在无线电内核中，该内核来自 pphone 供应商。所以答案是否定的。可以，但是安卓不行。
PS：这样做的 COTS 解决方案通常在出口方面受到限制并且相当昂贵。
Android does not offer APIs to do this. They are buried in radio kernel, which comes from pphone vendor. So answer is negative. It is possible but not with android.
PS: COTS solutions doing this are usually restricted in export and pretty expensive.
老实说，我不明白为什么这是不可能的。构建这样的应用程序的陷阱是
：用户很可能需要一部已root的手机和某种带有其内核的定制无线电。这不应该是一个大问题，因为大多数寻找类似功能的用户应该知道如何root他们的手机。
b.你将无法在市场上发布它。一旦谷歌发现此类恶意应用程序，他们就会立即将其删除。
Honestly I don't see why this would be impossible. The pitfall of building an app like this would be:
a. user will most likely need a rooted phone and some kind of custom radio with their kernel. This shouldn't be a huge issue though as most users looking for something like this should have the know how to root their phone.
b. you wouldn't be able to release this on the market. as soon as google caught wind of such a malicious app they would remove it immediately.
捕获其他对话的信号是不够的，因为信号至少是加密的！
Catching the signal of other conversation is not enough, cause signal is at least encrypted!