Application Framework Layer Introduction

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Activity Manager

Used to manage the application life cycle and to provide navigation fallback functionality that is often used.

Window Manager

Provide some ways to access our phone's screen.

The transparency, brightness, and background of the screen.

Content Providers

Enables applications to access data from an application, such as a contact database, or to share their own data.

View System

Can be used to build the application, which contains the list (Lists). A grid (Grids), a text box (boxes), a button (Buttons), or even a Web browser that can be embedded.

Notification Manager

Enables the application to display its own defined cue information in the status bar.

Package Manager

Provides access to the system's installation package. Includes installing, uninstalling apps. Query permission related information, query application related information and so on.

Telephony Manager

It provides a range of ways to access the status and information related to mobile communication. Query telecommunications network status information. SIM card information, and so on.

Resource Manager

Provides access to non-code resources, such as a local string. Graphics. and layout files.

Location Manager

Provides a way to obtain the address location of the device. Obviously, GPS navigation is sure to be able to use location services.

Xmpp
Extensible communication and presentation protocol.

Formerly known as Jabber, it provides instant messaging services. such as push function, Google talk.

Application Framework Layer Introduction