The main components of the Android application (application)

The various components of the Android application are bound together using manifest (checklists);

Mainly includes

1. Activity: Presentation layer, use fragment and view to layout and display information, and respond to user actions;

2. Service: No UI at run time, update data source and activity, trigger notification (notification) and broadcast intent;

3. Content Provider: Used to manage and persist application data, typically interacting with SQL databases;

4. Intent: It can be used to initiate and stop activity and service, to broadcast messages within the system or to targets, service or broadcast receiver, and to request a specific piece of data to be performed;

5. Broadcast Receiver: Enables applications to listen to intent broadcasts that match the specified filtering criteria;

6. Widget: A special variant of the broadcast receiver that can be used to create dynamic interactive application components that users can add to their home screens;

7. Notification: Send prompt information to users to attract users;

Author: csdn Blog spike_king

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