我的问题是我需要在我的应用程序中实现通讯录，支持安卓1.5、1.6和2.x。
我使用旧的Contacts API完成了它，而不是ContactsContract，因为兼容1.x系列。但是在显示我的应用程序时，2.x上的联系人列表不完整。在某些设备上，它显示为空，而在某些设备上，它只显示设备中的某些联系人。
我知道在2.x系列上使用联系人API只会显示主要帐户联系人，但实际上不是这样的。看起来只有最近更新的联系人会显示，但实际上也不是这样的。
那么问题就是：如何在2.x和1.x的Android版本中正确实施联系人列表？
提前致謝
But when displaying my app on 2.x the contact list is not complete. In some devices it s shown as empty, and in some devices it only displays some of the contacts in the device.
正确。旧版联系人API仅访问仅存储在设备上的联系人，而不是通过从其他提供商同步获得的联系人。还存在一个bug，即在Android 2.0中甚至无法获得本地存储的联系人，尽管在Android 2.0.1中已经修复。
So the question is: How to correctly implement contact list for both 2.x and 1.x android version?
对于小版本的具体改动(例如,你刚刚需要正确的<代码>Uri),你只能使用“思考”,见。
如果您的需求更加复杂，您可以通过创建一个接口（或抽象基类）和两个实现来利用条件类加载，分别针对每个API级别，然后只使用正确的实现。这在这个样本项目中演示了。
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