Using Android intent objects
Android Intent objects are used to facilitate communication between different components of an Android application, as well as between different applications. An Intent object represents an action to be performed, along with optional data that can be used by the receiving component.
Intents can be used to start an activity, to start a service, or to broadcast a message to other components. For example, an activity can use an Intent to start a second activity in the same application or in a different application. A service can use an Intent to perform background processing, such as downloading data from the internet. A broadcast intent can be used to send a message to other components of the system or other applications.
Intents consist of two parts: an action and data. The action represents the type of action that should be performed, such as “VIEW” to view data, “EDIT” to edit data, “SEND” to send data, or “DIAL” to dial a phone number. The data is optional and represents the data that should be used by the receiving component. For example, if the action is “VIEW” and the data is a URI, the receiving component might display the contents of the specified web page.
Intents can also include extras, which are additional data items that are passed along with the Intent. Extras can be used to pass data between components or to provide additional information about the action to be performed. For example, an Intent to start an activity might include an extra that specifies the data to be displayed. Overall, Intent objects provide a flexible and powerful mechanism for communicating between different components of an Android application or between different applications.
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