在 bindService 方法之后从未调用 onServiceConnected [英] onServiceConnected never called after bindService method

问题描述

我有一个特殊情况:由广播接收器启动的服务启动一个活动.我想让此活动能够与服务进行通信.我选择使用 AIDL 使其成为可能.除了在活动的 onCreate() 中调用的 bindService() 方法外，一切似乎都运行良好.事实上，bindService() 会抛出一个空指针异常，因为 onServiceConnected() 永远不会被调用，而服务的 onBind() 方法是.无论如何 bindService() 返回 true.该服务显然处于活动状态，因为它启动了活动.我知道从服务调用 Activity 听起来很奇怪，但不幸的是，这是在服务中进行语音识别的唯一方法.

I have a particular situation: a service started by a broadcast receiver starts an activity. I want to make it possible for this activity to communicate back to the service. I have chosen to use AIDL to make it possible. Everything seems works good except for bindService() method called in onCreate() of the activity. bindService(), in fact, throws a null pointer exception because onServiceConnected() is never called while onBind() method of the service is. Anyway bindService() returns true. The service is obviously active because it starts the activity. I know that calling an activity from a service could sound strange, but unfortunately this is the only way to have speech recognition in a service.

提前致谢

推荐答案

我无法从你的描述中弥补确切的问题，所以我会在这里猜测！

I can't make up the exact problem out of your description, so I'm going to guess here!

bindService() 如何抛出 NullPointerException?这可能(/应该)发生的唯一方法是当您不提供 Service 或 ServiceConnection 侦听器时.

How can bindService() throw a NullPointerException? The only way this could (/should) happen is when you don't supply a Service or a ServiceConnection listener.

bindService() 不能抛出 NullPointerException 因为 onServiceConnected() 没有被调用.对 onServiceConnected() 的调用是 bindService() 的产物.

bindService() can't throw a NullPointerException because onServiceConnected() isn't called. The call to onServiceConnected() is a product of bindService().

所以我猜您在 Service 实际绑定之前调用了 AIDL 方法?

So I guess you are calling a AIDL method, before the Service has actually bonded?

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