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important considerations for the limited memory and
battery-powered devices.
2.
Core Java libraries, which come with Android.
c.
Application Framework
This layer provides the advanced components which are
important in developing android applications. Android comes
with the framework preinstalled, but it is possible to further
extend it with other components.
The most important parts of the framework are as follows:
1.
Activity Manager. This part controls the life cycle of
applications and maintains user application navigation.
2.
Content Providers. These objects encapsulate data
that needs to be shared between applications, such as
contacts.
3.
Resource Manager. This manages resources, which
are anything that goes with your program but is not a
code.
4.
Location Manager. Allows an Android device to
know where it is.
5.
Notification Manager. Alerts user for events such as
arriving messages, appointments, proximity alerts, and
more, in an unobtrusive fashion.
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