Android URI类-它的作用是什么？

Question

I read the definition of the URI class here and here , but I'm still not sure how I would use an URI object in a android project since the second answer does not address URI in its specific use cases. Does anyone have a better insight on what an URI object can be used for? In what kinds of circumstances should I instantiate an URI object? When is an URI object useful and why should I create one? It would be helpful to have a concrete example. Below is an example I found by creating a blank dialog via Android Studio (factory method provided when one creates).

    public void onButtonPressed(Uri uri) {
    if (mListener != null) {
        mListener.onFragmentInteraction(uri);
    }

or

    public interface OnFragmentInteractionListener {
    void onFragmentInteraction(Uri uri);
    }

If the examples above are not helpful you could use your own explanation as when a developer should consider creating an URI object. Thanks.

Answer 1

@ CBA110，您可以将URI视为您的android系统中的本地地址。由于我已经使用过Contacts URI，因此我是这样考虑的.Contacts URI是通讯录数据库，如果您要从该数据库查询任何联系人，则需要使用此通讯录URI用作您的android手机/系统中的本地地址，并检索您需要的联系人。如果您不理解，请不要挖掘。