How to test an Activity that USES a ContentProvider without affecting production database?

如何测试活动，使用一个内容提供者不影响生产数据库？

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The inputChanged() method accepts a Viewer as an input argument, so multiple views can use a single ContentProvider.

inputChanged()方法接受 Viewer作为输入参数，所以多个视图可以使用一个 ContentProvider。

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A content provider is implemented as a subclass of ContentProvider and must implement a standard set of APIs that enable other applications to perform transactions.

一个content provider通过继承ContentProvider抽象类并且实现允许其他应用执行事务的一组标准API来实现。

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