WeatherProvider.java 文件源码

static UriMatcher buildUriMatcher() {
    // I know what you're thinking.  Why create a UriMatcher when you can use regular
    // expressions instead?  Because you're not crazy, that's why.

    // All paths added to the UriMatcher have a corresponding code to return when a match is
    // found.  The code passed into the constructor represents the code to return for the root
    // URI.  It's common to use NO_MATCH as the code for this case.
    final UriMatcher matcher = new UriMatcher(UriMatcher.NO_MATCH);
    final String authority = WeatherContract.CONTENT_AUTHORITY;

    // For each type of URI you want to add, create a corresponding code.
    matcher.addURI(authority, WeatherContract.PATH_WEATHER, WEATHER);
    matcher.addURI(authority, WeatherContract.PATH_WEATHER + "/*", WEATHER_WITH_LOCATION);
    matcher.addURI(authority, WeatherContract.PATH_WEATHER + "/*/#", WEATHER_WITH_LOCATION_AND_DATE);

    matcher.addURI(authority, WeatherContract.PATH_LOCATION, LOCATION);
    return matcher;
}