This post will walk you through Android ListView Tutorial for building simple and customized ListView using different Android adapters.
List is one of the most common UI patterns, which is being used extensively to display the collection of data elements in rows. In android ListView is a view group that displays a list of scrollable items. The list items are automatically inserted to the list using an Adapter that pulls content from a source such as an array.
This post will walk you through Android ListView Tutorial for building simple and customized ListView using different Android adapters.
List is one of the most common UI patterns, which is being used extensively to display the collection of data elements in rows. In android ListView is a view group that displays a list of scrollable items. The list items are automatically inserted to the list using an Adapter that pulls content from a source such as an array.
This presentation is about RecyclerView
and special features which can make work with it even better: Adapter, LayoutManager, ItemAnimator, ItemDecoration etc.
Presentation by Oleksandr Kravchenko (Software Engineer, GlobalLogic, Lviv), delivered at Mobile TechTalk Lviv on April 28, 2015.
More details - http://globallogic.com.ua/mobile-techtalk-lviv-2015-report
This presentation is about RecyclerView
and special features which can make work with it even better: Adapter, LayoutManager, ItemAnimator, ItemDecoration etc.
Presentation by Oleksandr Kravchenko (Software Engineer, GlobalLogic, Lviv), delivered at Mobile TechTalk Lviv on April 28, 2015.
More details - http://globallogic.com.ua/mobile-techtalk-lviv-2015-report
Chia sẻ của anh Lê Văn Giáp: Android Tech Leader- VCCorp, Tech Advisor GDG Hanoi, Founder/Admin VietAndroid.com, cựu CEO của ViMarket - Kho ứng dụng thuần Việt đầu tiên của VN.
Bonnes pratiques et méthodes pour le développement sur Android ; Collectées ici et là à travers différentes conférences, lectures et pratiques du développement android.
Grid View- GridView is a ViewGroup that displays items in a two d.pdfdeepua8
Grid View:
- GridView is a ViewGroup that displays items in a two dimensional,
scrollable grid. The grid items are automatically inserted to the
layout using a Adapter.
- An Adapter (BaseAdapter or ListAdapter) is the bridge between a
List/Grid View and the data that fill the view.
- Grid View implementation is a perfect example of Model View
Controller approach.
Grid View shows elements.
The Adapter manages the model defining information structure
and providing data to the view.
The method setOnItemClickListener(new OnItemClickListener()
{..});
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_view);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));
gridview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View v, int position, long id) {
Log.d(TAG,
\"\" + position);
}
});
}
Scroll View:
Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger
than the physical display.
- A ScrollView is a FrameLayout, meaning you should place one child in it containing the entire
contents to scroll; this
child may itself be a layout manager with a complex hierarchy of objects. A child that is often
used is a LinearLayout in
a vertical orientation, presenting a vertical array of top-level items that the user can scroll
through.
- The TextView class also takes care of its own scrolling, so does not require a ScrollView, but
using the two together is
possible to achieve the effect of a text view within a larger container.
- ScrollView only supports vertical scrolling
...
List View:
- ListView is a ViewGroup that creates a list of scrollable items. The
list items are automatically inserted to the list using a ListAdapter.
- The ListAdapter extends Adapter creating the bridge between a
ListView and the data that backs the list.
- The ListView can display any data provided that it is wrapped in a
ListAdapter.
- You can use default Adapters like the ArrayAdapter that use a List
of String object as input and by default expects that the provided
resource id references a single TextView.
- You can create your own Adapter to create customized ListViews
according to a specific application requirements.
Solution
Grid View:
- GridView is a ViewGroup that displays items in a two dimensional,
scrollable grid. The grid items are automatically inserted to the
layout using a Adapter.
- An Adapter (BaseAdapter or ListAdapter) is the bridge between a
List/Grid View and the data that fill the view.
- Grid View implementation is a perfect example of Model View
Controller approach.
Grid View shows elements.
The Adapter manages the model defining information structure
and providing data to the view.
The method setOnItemClickListener(new OnItemClickListener()
{..});
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
.
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GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
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The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
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Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
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Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
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1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
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What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
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Presented by Vladimir Iglovikov:
- https://www.linkedin.com/in/iglovikov/
- https://x.com/viglovikov
- https://www.instagram.com/ternaus/
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Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
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Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
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Key insights include the importance of automation, making the adoption process seamless, and leveraging offline interactions for marketing. The presentation also emphasizes the need for continuous small improvements and building a friendly, inclusive community that contributes to the project's growth.
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Explore more about Albumentations and join the community at:
GitHub: https://github.com/albumentations-team/albumentations
Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations
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End-to-end overview of CI/CD pipeline with Azure devops
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Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
2. AdapterView
The AdapterView is a ViewGroup subclass
whose child Views are determined by an
Adapter that binds AdapterView object to
data of some type.
Typically you are going to use subsclasses of
AdapterView class instead of using it directly
Example subclasses of AdapterView class
ListView
Spinner
Gallery
3. Adapter
You
can populate an AdapterView such
as ListView or GridView by binding the
AdapterView instance to an Adapter,
which retrieves data from an external
source and creates a View that
represents each data entry.
5. So
The
Adapter provides access to the data
items.
The Adapter is also responsible for making
a View for each item in the data set.
Types of Adatpers - they implements
ListAdatper interface
ArrayAdatper
CursorAdatper
There are a few more
6. Adapter Class Hierarchy
BaseAdatper
abstract class implements
ListAdapter and SpinnerAdatper
interfaces
ArrayAdapter and CursorAdapter classes
are subclasses of BaseAdapter class
7. AdapterView Responsibilities
Two
main responsibilities of AdapterView
Filling the layout with data (with a help from
Adapter)
Handling user selections - when a user
selects an item, perform some action
AdapterView.OnItemClickListener
AdapterView.OnItemLongClickListener
AdapterView.OnItemSelectedListener
8. ListActivity
Android-provided class specially designed for
displaying a list of items by binding to a data
source such as an array or Cursor, and exposes
event handlers when the user selects an item.
ListActivity hosts a ListView object that can be
bound through an adatper to different data
sources, typically either an array or a Cursor
holding query results.
setListAdapter(ListAdatper adapter) method
automatically creates ListView object from the
ListAdapter object
Has a default layout that consists of a single, fullscreen list in the center of the screen
10. Notice
that this does not load a layout file
for the Activity (which you usually do with
setContentView(int)).
setListAdapter(ListAdapter) automatically
adds a ListView to fill the entire screen of
the ListActivity.
11. What is the difference
between a ListView and a
ScrollView ?
13. Listview
ListView
is a view group that displays a list
of scrollable items. The list items are
automatically inserted to the list using an
Adapter that pulls content from a source
such as an array or database query and
converts each item result into a view
that's placed into the list.
14. Spinner
A
view that displays one child at a time
and lets the user pick among them.
The items in the Spinner come from the
Adapter associated with this view.
16. In ArrayAdapter
Data updates
The ArrayAdapter class allows to remove all
elements in its underlying data structure with the
clear() method call.
You can then add new elements via the add()
method or a Collection via the addAll() method.
You can also directly modify the underlying data
structure and call the notifyDataSetChanged()
method on the adapter to notify him about the
changes in data.
Editor's Notes
public class HelloListView extends ListActivity { static final String[] COUNTRIES = new String[] { ”Palestine", ”Jordan", ”Sudan", ”Egypt" }; /** Called when the activity is first created. */ @Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Create an adapterArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>( this, // Application contextR.layout.list_item, // layout description for each list item COUNTRIES); // String array of countries defined setListAdapter(arrayAdapter); }}
For example, you may use a ScrollView to display a graphical user interface larger then the actual screen. The GUI is static in the sense that its content will never change, and the reason to use a ScrollView is to access all the widgets on the GUI. On the other hand consider the contacts list on your android phone, if you access it you will get a list of contacts, if you delete a contact and reopen it, you will get a different list of contacts. For that reason the ListView displays dynamic content.
public class MyAndroidAppActivity extends Activity { private Spinner spinner1; @Override public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);static final String[] COUNTRIES = new String[] { ”Palestine", ”Jordan", ”Sudan", ”Egypt" };spinner1 = (Spinner) findViewById(R.id.spinner1);ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, COUNTRIES );dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);spinner.setAdapter(dataAdapter); }}