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Plugin
A plugin is a software add-on that is installed on a program,
enhancing its capabilities. For example, if you wanted to watch
a video on a website, you may need a plugin to do so. If the
plugin is not installed, your browser will not understand how to
play the video.
A plugin is a piece of software containing a group of functions that can be added to a
WordPress website. They can extend functionality or add new features to your WordPress
websites.
Eclipse
Fragments are always optional for their host plug-in and the host plug-in doesn’t even know
that it exists.
The Eclipse IDE supports the creation of fragments via fragment projects. To create a
fragment project select File New Other… Plug-in Development Fragment Project.
Eclipse provides a facility to create a Simple Android Application which does not contains
any Fragment classes or Layout files.
You can just create simple project besides selecting any kind of templates for the project.
Why we need Fragments in Android?
If we already have Activity, and a Fragment is just like a sub-activity,
then what is the use of having an additional component in Android?
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Well, before the introduction of Fragments(Fragments were added in
Honeycomb version of Android i.e API version 11), we could only have
a single Activity on a screen at a given point of time, and there was no
way to divide the screen and control the different parts separately.
And as the screen size of the Mobile devices are increasing, it makes
more sense to show more stuff at the same time on the screen, hence
Fragments are very useful, and are very popular amongst the Android
developers community.
Main use of Fragments in Android
Following are the 3 main usage of Fragments in Android, for which
Fragments were introduced:
1. Modularity: If a single activity is having too many functional
components, its better to divide it into independent fragments,
hence making the code more organized and easier to maintain.
2. Reusability: If we define aany particular feature in a fragment,
then that feature more or less becomes a reusable component
which can be easily intgerated into any activity.
3. Adaptability: If we break UI components of an app screen into
fragments, then it becomes easier to change their orientation
and placement, based on screen size etc.
Lifecycle Methods for Fragment
This is called when the fragment becomes active or interactive.
Method Name
Description
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onAttach(Activity)
It is called once, when the
fragment is attached to
the activity.
onCreate(Bundle)
The system calls this
method when a fragment
is created. This is an
important method and
you should implement
the essential components
of the fragment in this
method.
onCreateView()
This method is called
when the UI of the
fragment has to be
initialised. It is called
when the fragment is first
created and then when
the fragment returns
back to the layout from
the back stack. This
method usually returns
a View component but if
the fragment doesn't
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have a UI, then you can
return a null.
onActivityCreated()
This method is called
when the host activity is
created. By this time, we
can even access the
fragment's view using
the findViewById() method.
onStart()
This method is called
when the fragment
becomes visible on the
device's screen.
onResume()
onPause()
This is called when a
fragemnt is no longer
interactive and the user is
about to leave the
fragment. At this point, it
is suggested to save any
data for the existing user
session, if required.
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onStop()
This method is called
when the fragment is no
longer visible.
onDestroyView()
This is called when the
fragment is to be be
destroyed. Here you can
do the clean up the
resources before the
fragment is destroyed.
onDestroy()
This is called for the final
clean up of fragment's
state.
onDetach()
It is called jus

Unformatted Attachment Preview

Plugin A plugin is a software add-on that is installed on a program, enhancing its capabilities. For example, if you wanted to watch a video on a website, you may need a plugin to do so. If the plugin is not installed, your browser will not understand how to play the video. A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. Eclipse Fragments are always optional for their host plug-in and the host plug-in doesn’t even know that it exists. The Eclipse IDE supports the creation of fragments via fragment projects. To create a fragment project select File New Other… Plug-in Development Fragment Project. Eclipse provides a facility to create a Simple Android Application which does not contains any Fragment classes or Layout files. You can just create simple project besides selecting any kind of templates for the project. Why we need Fragments in Android? If we already have Activity, and a Fragment is just like a sub-activity, then what is the use of having an additional component in Android? Well, before the introduction of Fragments(Fragments were added in Honeycomb version of Android i.e API version 11), we could only have a single Activity on a screen at a given point of time, and there was no way to divide the screen and control the different parts separately. And as the screen size of the Mobile devices are increasing, it makes more sense to show more stuff at the same time on the screen, hence Fragments are very useful, and are very popular amongst the Android developers community. Main use of Fragments in Android Following are the 3 main usage of Fragments in Android, for which Fragments were introduced: 1. Modularity: If a single activity is having too many functional components, its better to divide it into independent fragments, hence making the code more organized and easier to maintain. 2. Reusability: If we define aany particular feature in a fragment, then that feature more or less becomes a reusable component which can be easily intgerated into any activity. 3. Adaptability: If we break UI components of an app screen into fragments, then it becomes easier to change their orientation and placement, based on screen size etc. Lifecycle Methods for Fragment This is called when the fragment becomes active or interactive. Method Name Description It is called once, when the onAttach(Activity) fragment is attached to the activity. The system calls this method when a fragment is created. This is an important method and onCreate(Bundle) you should implement the essential components of the fragment in this method. onCreateView() This method is called when the UI of the fragment has to be initialised. It is called when the fragment is first created and then when the fragment returns back to the layout from the back stack. This method usually returns a View component but if the fragment doesn't have a UI, then you can return a null. This method is called when the host activity is created. By this time, we onActivityCreated() can even access the fragment's view using the findViewById() method. onStart() This method is called when the fragment becomes visible on the device's screen. onResume() onPause() This is called when a fragemnt is no longer interactive and the user is about to leave the fragment. At this point, it is suggested to save any data for the existing user session, if required. onStop() This method is called when the fragment is no longer visible. onDestroyView() This is called when the fragment is to be be destroyed. Here you can do the clean up the resources before the fragment is destroyed. onDestroy() This is called for the final clean up of fragment's state. onDetach() It is called jus Name: Description: ...
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