What is Uri.parse in android
The "tel:" and "geo:" are called Data schemes in android it tells the intent what application are you looking for
eg- if you use tel: it will tell the android system that you are looking for callling applicaion and it will open all the calling applications.If you use geo: it will tell androdid system that you are looking for a map or location app eg the google maps
1.1 Overview of URI
URI are characterized by the following definitions:
Uniform Uniformity provides several benefits: it allows different types of resource identifiers to be used in the same context, even when the mechanisms used to access those resources may differ; it allows uniform semantic interpretation of common syntactic conventions across different types of resource identifiers; it allows introduction of new types of resource identifiers without interfering with the way that existing identifiers are used; and, it allows the identifiers to be reused in many different contexts, thus permitting new applications or protocols to leverage a pre-existing, large, and widely-used set of resource identifiers. Resource A resource can be anything that has identity. Familiar examples include an electronic document, an image, a service (e.g., "today's weather report for Los Angeles"), and a collection of other resources. Not all resources are network "retrievable"; e.g., human beings, corporations, and bound books in a library can also be considered resources. The resource is the conceptual mapping to an entity or set of entities, not necessarily the entity which corresponds to that mapping at any particular instance in time. Thus, a resource can remain constant even when its content---the entities to which it currently corresponds---changes over time, provided that the conceptual mapping is not changed in the process. Identifier An identifier is an object that can act as a reference to something that has identity. In the case of URI, the object is a sequence of characters with a restricted syntax.
Here are some in use:
1.3. Example URI
The following examples illustrate URI that are in common use.
ftp://ftp.is.co.za/rfc/rfc1808.txt -- ftp scheme for File Transfer Protocol services
gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles -- gopher scheme for Gopher and Gopher+ Protocol services
http://www.math.uio.no/faq/compression-faq/part1.html -- http scheme for Hypertext Transfer Protocol services
[email protected] -- mailto scheme for electronic mail addresses
news:comp.infosystems.www.servers.unix -- news scheme for USENET news groups and articles
telnet://melvyl.ucop.edu/ -- telnet scheme for interactive services via the TELNET Protocol
References:
http://www.faqs.org/rfcs/rfc2396.html
Uniform Resource Identifier (URI) is a string of characters used to identify a resource.A URI identifies a resource either by location, or a name, or both. Such identification enables interaction with representations of the resource over a network, typically the World Wide Web, using specific protocols. ex- a URL is a URI. * What is Uri.parse()* it does not 'parse'but it actually creates a Uri object, using the string passed to it and the string is hidden from the user. Now the question is what does the Uri object do?? So the URI object is an immutable reference to a URI which we can use to refer to resources .
A Uri object is usually used to tell a ContentProvider what we want to access by reference. It is an immutable one-to-one mapping to a resource or data. The method Uri.parse
creates a new Uri
object from a properly formated String
. See here for more information about ContentProviders
.