用于监听联系人更改的ContentObserver [英] ContentObserver for listening contact changes

问题描述

我真的不明白为什么内容观察者会收听与联系信息无关的更改.

I really don't understand why content observer listens the changes which is not related with the contact info.

我只是注册到我想听的更改的URI:

I simply registered to the URI which I wanna listen the changes:

getContentResolver().registerContentObserver(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, true, contactsObserver);

但是在呼叫某人或发短信给某人后，它会触发并调用ContentObserver中的onChange方法.因此，尽管我不需要这样做，但我需要将所有联系人列表与我的应用程序重新同步.

But after calling someone or texting to someone, it triggers and calls onChange method in ContentObserver. So I need to re-sync all the contact list with my application although I don't need to do.

只有我感兴趣的领域:

• ContactsContract.CommonDataKinds.Phone.CONTACT_ID
• ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME
• ContactsContract.CommonDataKinds.Phone.NUMBER

我应该实施哪种更改来侦听此数据库项目的更改?

What kind of changes should I implement to listen the changes for this DB items?

推荐答案

联系人"数据库​​的字段为ContactsContract.Contacts.TIMES_CONTACTED 每次您与联系人列表中的某人联系时，此字段都会更新.

The Contacts database has a field ContactsContract.Contacts.TIMES_CONTACTED This field is updated every time you contact someone in your contact list.

甚至可以使用自己的应用程序来更新此字段，这意味着，如果您使用更新该字段的应用程序与任何联系人联系，则会调用您的onChange()方法.

It is even possible to update this field using your own app, which means, if you contact any contact using an app that updates this field, your onChange() method will be called.

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