如何检测和管理来电（Android）？
我想创建一个应用程序，可以检测来电并在一定数量的蜂鸣声（响铃）后启动我的自定义活动，我的意思是在 2 或 3 或 5 声蜂鸣声（响铃）后我的 activity 被触发。我该怎么做呢？
谢谢
I want to create an application that can detect incoming calls and start my custom activity after a certain number of beeps (rings), I mean after 2 or 3 or 5 beeps (rings) my activity is triggered. How can I do it?
Thanks
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我认为您无法计算自来电开始以来电话响了多少次。无法对单个铃声进行明确的测量，因为用户可以轻松地将铃声更改为不重复的曲调，例如歌曲。
然而，您可以做的是计算自呼叫到达以来所经过的时间。为
PHONE_STATE设置一个BroadcastReceiver（您需要清单中的相应权限才能接收事件）。收到PHONE_STATE附带的EXTRA_STATE_RINGING后，通过AlarmManager设置闹钟，该闹钟将触发Service检查EXTRA_STATE_OFFHOOK（在接听电话时广播）是否在您的等待时间后广播。如果没有，那么您可以启动答录机。我写了一个快速教程在我的网站中，了解如何捕获呼叫的到达（当电话响起时）、呼叫何时接听以及呼叫何时结束。
I don't think you can count the number of rings the phone made since the start of the incoming call. There can't be a definitive measure of a single ring because the user can easily change the ringtone to a non-repetitive tune, for example, a song.
What you can do, however, is count the amount of time that passed since the arrival of the call. Set up a
BroadcastReceiverforPHONE_STATE(you will need the corresponding permission in the manifest to receive the event). Once you receive theEXTRA_STATE_RINGINGthat came with thePHONE_STATE, set an alarm via theAlarmManagerthat will fire aServicethat checks ifEXTRA_STATE_OFFHOOK(broadcast when the call is picked up) has been broadcast after your waiting time. If not, then you can start your answering machine.I have written a quick tutorial in my website on how to catch the call's arrival (when the phone rings), when the call is picked up, and when it ends.
我关于检测来电和去电的文章，包含分步说明：
在 Android 上检测来电和去电
当您检测到来电时，您可以启动一个计时器，间隔等于 beepInterval * beepCount。并在此计时器上启动活动。
My article about detecting incoming and outgoing calls, with the step-by-step instructions:
Detecting incoming and outgoing phone calls on Android
When you detect incoming call, you can start a timer, with interval equal to beepInterval * beepCount. And launch activity on this timer.