ContentObserver应该调用当且仅当ContactsContract.Contacts.CONTENT_URI改变 [英] ContentObserver should call if and only if ContactsContract.Contacts.CONTENT_URI changes

问题描述

我的应用程序从 android.provider.ContactsContract.Data 使用量（API> 11）和 ContactsContract.Contacts.CONTENT_URI （API＆LT; 11）来填充联系人

As my application uses content from android.provider.ContactsContract.Data (API > 11) and ContactsContract.Contacts.CONTENT_URI (API < 11) to populate Contacts.

我试图 registerContentObserver（）对这些供应商。但它会调用我的 ContentObserver 即使我试图调用一个人从设备，只要我把电话。它确实引起我的 ContentObserver 这是不是对我很有用，因为没有含量的变化联系人提供。

I've tried to registerContentObserver() against these provider. But it calls my ContentObserver even if I tries to Call a person from device as soon as I put the call. It does trigger my ContentObserver which is not useful for me as there's no Content Change in Contacts Provider.

根本原因： 的

好像 LAST_TIME_CONTACTED 或东西在 ContactsContract.Contacts.CONTENT_URI 做更改时调用实现了从设备这合法wokes由 ContentObserver 。

Seems like LAST_TIME_CONTACTED or something in ContactsContract.Contacts.CONTENT_URI do changes when a call has been made from device which legitimate wokes up by ContentObserver.

试过了： 的

private class ContactsContentObserver extends ContentObserver {
    public ContactsContentObserver() {
        super(null);
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);
        Zname.getPreferences().setRefreshContact(true);
    }
}

注册 ContentObserver 在的OnCreate（） 活动的

ContactsContentObserver contactsContentObserver = new ContactsContentObserver();
getContentResolver().registerContentObserver(ContactsContract.Contacts.CONTENT_URI, false, contactsContentObserver);

在 registerContentObserver 与 notifyForDescendents 为假审判。不过它触发了 ContentObserver

Tried with notifyForDescendents as false on registerContentObserver. Still it triggers out ContentObserver

QUES： 的

哪有一个寄存器 ContentObserver 这将触发当且仅当联系人信息下的CRUD（创建，更新，删除），除了 Last_Time_Contacted 或它的后代？ 的

How can one register ContentObserver which triggers if and only if contacts information is under CRUD(Create,Update,Delete) except Last_Time_Contacted or its descendants?

推荐答案

这里的根本问题是，在注册 ContactsContract.Contacts.CONTENT_URI 不工作，你可能合理的想法。

The fundamental problem here is that registering for ContactsContract.Contacts.CONTENT_URI isn't working as you might reasonably think.

为什么你的更新，即使 notifyForDescendents 的理由是假是因为乌里触发更新... ContactsContract.Contacts.CONTENT_URI 和没有的正被拨打的联系人行。

The reason why you get updates even if notifyForDescendents is false is because the Uri triggering the update is... ContactsContract.Contacts.CONTENT_URI and not the contact row that is being dialled.

有问题的code在联系人应用程序可以在<一个发现href="http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android-apps/4.0.1_r1/com/android/providers/contacts/ContactsProvider2.java#ContactsProvider2.notifyChange%28boolean%29"相对=nofollow> grep的code 并有一个bug针对这个上的谷歌code 。

The offending code in the Contacts app can be found at GrepCode and there is a bug filed for this on Google Code.

因此​​，要回答你的问题，您不能注册 ContentObserver 将触发对接触特定的领域。您需要有东西在你的应用程序，这将使计算的差异，只要的onChange 火灾的轨道。

So to answer your question, you can't register a ContentObserver which will trigger for specific fields on a contact. You would need to have something in your app which will keep track of calculating the differences whenever onChange fires.

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