Each application Context includes a ContentResolver instance, accessible using the getContentResolver method.
ContentResolver cr = getContentResolver();
The Content Resolver includes a number of methods to modify and query Content Providers. Each method accepts a URI that specifies the Content Provider to interact with.
A Content Provider's URI is its authority as defined by its manifest node. An authority URI is an arbitrary string, so most Content Providers include a public content_uri property to publish that authority.
Content Providers usually expose two forms of URI, one for requests against all data, and another that specifies only a single row. The form for the latter appends /<rowiD> to the general content_uri.
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