![]() Main use of Fragments in Androidįollowing are the 3 main usage of Fragments in Android, for which Fragments were introduced: Therefore it is also suggested to keep the design of a Fragment modular and independent, so that it can be used on different screens/activity based on the screen size or any other factor. If the screen size is big, then we can easily show 2 or maybe more fragments on the screen, but if the display size is smaller, it is advised to use Fragments in separate activities. The usage of Fragment in an android app totally depends on the screen size of the device on which the app is being used. ![]() 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.Īnd 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. 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? So, Fragment is a very interesting component of Android OS which can be used in multiple ways in an android app. Generally, fragments are used to create multi-pane UI in Android apps.Ī Fragment has it's own Layout for the UI(user interface), but we can even define a fragment without any layout, to implement a behavious which has no user interface, more like a background service. If you know Biology, and are aware of the concept of Host and Parasite, then in Android, Activity is the host while a Fragment is a parasite.įragment has its own lifecycle events, which are different from an Activity's lifecylce events.Īn Activity can have any number of fragments in it, although it is suggested to not to use too many fragments in a single activity.Īlso, a fragment is a re-usable component, hence, a single fragment can be included in multiple activities, if required. It functions independently, but as it is linked to the Activity, when an activity is destroyed, the fragment also gets destroyed. Android SDK Manager & required PackagesĪ Fragment in Android is a component which can be used over an activity to define an independent modular UI component attached to the activity.In our discovered inventory view – we should be able to see the state change from “Unmonitored” to “Healthy” because our custom class now gets health rollup from the monitor we just created. When enough time passes, the agent will get the new MP, and will load the new monitor. Step 6: Import or Deploy the management pack. ![]() There are also display strings which can be modified for the monitor display name, alert name, and alert description. It is a simple monitor definition, that will generate an alert and change state when the spooler service isn’t running. Take another few minutes to review the XML we have in this fragment. For a service monitor, I like to use the short name of the service, with NO SPACES OR SPECIAL CHARACTERS. Replace #UniqueID# with something that represents what this monitor does. For this Demo, since “DemoApp” is a made up application example, we will just use the Print Spooler service. Replace #ServiceName# with the short name of any service. This was “ ” from our previous class fragment. Replace #ClassID# with the custom class we created in Step 2. Replace #AppName# with our App ID, which is “ DemoApp” Replace #CompanyID# with our company ID which is “ Fab” Select in solution explorer to display the XML. Right click Monitors, and Add > Existing item.įind the fragment named “ ” and add it. Step 3: Create a folder and add the fragment to it.Ĭreate a folder called “Monitors” in your MP: This solution was created in Part 1, and the class was created in Part 2. ![]() Step 2: Open your newly created MP solution, and open Solution Explorer. I will update these often as I enhance and add new ones, so check back often for new versions. Step 1: Download and extract the sample MP fragments. ![]() In our next example fragment – we will monitor a service by creating a monitor that targets our custom class. This is Part 3 in a series of posts described here: ![]()
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