The document discusses various data storage options in Android including shared preferences, internal storage, external storage, SQLite databases, and network/cloud storage. It provides details on how to use shared preferences to store private data in key-value pairs, how to read and write files to internal and external storage, how to create and manage SQLite databases to store structured data, and lists some popular cloud storage providers.
An Activity is an application component that provides a screen with which users can interact in order to do something, such as dial the phone, take a photo, send an email, or view a map.
Each activity is given a window in which to draw its user interface. The window typically fills the screen, but may be smaller than the screen and float on top of other windows.
An application usually consists of multiple activities that are loosely bound to each other. Typically, one activity in an application is specified as the "main" activity, which is presented to the user when launching the application for the first time. Each activity can then start another activity in order to perform different actions.
Each time a new activity starts, the previous activity is stopped, but the system preserves the activity in a stack .
When a new activity starts, it is pushed onto the back stack and takes user focus.
This Presentation will give u information about Android :
1. Implicit Intent Overview (Action, Data, category, etc)
2. How intent works How intent filter works and writing our own intent filters
Data Storage in Andorid used to store application data in databases, files, or preferences, in internal or removeable storage. Used to add a data backup service to let users store and recover application and system data.
Android provides several options for you to save persistent application data. The solution you choose depends on your specific needs, such as whether the data should be private to your application or accessible to other applications (and the user) and how much space your data requires.
An Activity is an application component that provides a screen with which users can interact in order to do something, such as dial the phone, take a photo, send an email, or view a map.
Each activity is given a window in which to draw its user interface. The window typically fills the screen, but may be smaller than the screen and float on top of other windows.
An application usually consists of multiple activities that are loosely bound to each other. Typically, one activity in an application is specified as the "main" activity, which is presented to the user when launching the application for the first time. Each activity can then start another activity in order to perform different actions.
Each time a new activity starts, the previous activity is stopped, but the system preserves the activity in a stack .
When a new activity starts, it is pushed onto the back stack and takes user focus.
This Presentation will give u information about Android :
1. Implicit Intent Overview (Action, Data, category, etc)
2. How intent works How intent filter works and writing our own intent filters
Data Storage in Andorid used to store application data in databases, files, or preferences, in internal or removeable storage. Used to add a data backup service to let users store and recover application and system data.
Android provides several options for you to save persistent application data. The solution you choose depends on your specific needs, such as whether the data should be private to your application or accessible to other applications (and the user) and how much space your data requires.
Assets, Files, and Data Parsing
Android offers a few structured ways to store data, notably SharedPreferences and local SQLite databases.
And, of course, you are welcome to store your data “in the cloud” by using an Internet-based service.
Beyond that, though, Android allows you to work with plain old ordinary files, either one baked into your app (“assets”) or ones on so-called internal or external storage.
To make those files work — and to consume data off of the Internet — you will likely need to employ a parser. Android ships with several choices for XML and JSON parsing, in addition to third-party libraries you can attempt to use.
This session focuses on Assets, Raw, and Files.
Android | Busy Java Developers Guide to Android: Persistence | Ted NewardJAX London
2011-11-02 | 10:00 AM - 11:00 AM
The Android ecosystem offers a few different ways to store things across restarts, but because Android also runs Java, a few more options also make themselves available, which means the Android developer has a pretty wide assortment of choices available to her. In this session, we’ll talk about those available choices, the pros and cons of each, and how to and when to use them. (Note: this session assumes you have some familiarity with the Android environment.)
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
2. Data Storage In Android
Shared Preferences:-Store private primitive data in
key-value pairs.
Internal Storage:-Store private data on the device
memory.
External Storage:-Store public data on the shared
external storage.
SQLite Databases:-Store structured data in a
private database.
Network Connection:-Store data on the web with
your own network server.
3. Shared Preferences
Useful for storing and retrieving primitive
data in key value pairs.
Lightweight usage, such as saving application
settings.
Typical usage of SharedPreferences is for saving
application such as username and password,
auto login flag, remember-user flag etc.
4. Shared Preferences Contd…..
The shared preferences information is stored in
an XML file on the device
Typically in/data/data/<Your Application’s package
name>/shared_prefs
SharedPreferences can be associated with the entire
application, or to a specific activity.
Use the getSharedPrefernces() method to get access
to the preferences
5. Shared Preferences Contd…..
Example:
SharedPrefernces prefs = this.getSharedPrefernces(‘myPrefs,
MODE_PRIVATE’)
If the preferences XML file exist, it is opened,
otherwise it is created.
To Control access permission to the file:
MODE_PRIVATE:private only to the application
MODE_WORLD_READABLE:all application can read XML file
MODE_WORLD_WRITABLE:all application can write XML file
6. Shared Preferences Contd…..
To add Shared preferences, first an editor object is
needed
Editor prefsEditor = prefs.edit();
Then,use the put() method to add the key-value pairs
prefsEditor.putString(“username”,”D-Link”);
prefsEditor.putString(“password”,”vlsi#1@2”);
prefsEditor.putint(“times-login”,1);
prefsEditor.commit();
7. Shared Preferences Contd…..
To retrieve shared preferences data:
String username = prefsEditor.getString(“username”.” ”);
String password = prefsEditor.getString(“password”.” ”);
If you are using SharedPrefernces for specific
activity, then use getPreferences() method
No need to specify the name of the preferences file
9. Internal Storage
Android can save files directly to the device
internal storage.
These files are private to the application and will
be removed if you uninstall the application.
We can create a file using openFileOutput() with
parameter as file name and the operating mode.
Generally not recommended to use files.
10. Internal Storage Contd….
Similarly, we can open the file using
openFileInput() passing the parameter as the
filename with extension.
File are use to store large amount of data
Use I/O interfaces provided by java.io.* libraries
to read/write files.
Only local files can be accessed.
11. File Operation(Read)
Use context.openFileInput(string name) to
open a private input file stream related to a program.
Throw FileNotFoundException when file does
not exist.
Syntax:-
fileinputStram.in=this.openfileinput(“xyz.txt”)
.
.
.
.
.
In.close()://Close input stream
12. File Operation (Write)
Use context.openFileOutput(string name,int
mode ) to open a private output file stream related
to a program.
The file will be created if it does not exist.
Output stream can be opened in append mode,
which means new data will be appended to end of
the file.
String mystring=“Hello World”
14. External Storage
Every Android-compatible device supports a shared
“external storage” that you can use to save files
Removable storage media (such as an SD card)
Internal (non-removable) storage
File saved to the external storage are world readable
and can be modified by the user when they enable
USB mass storage to transfer files on computer.
These files are private to the application and will
be removed when the application is uninstalled.
15. External Storage Continue
Must check whether external storage is available first
by calling getExternalStorageState()
Also check whether it allows read/write before reading/writing
on it
getExternalFilesDir() takes a parameter such as
DIRECTORY_MUSIC,DIRECTORY_RINGTONE
etc,to open specific type of subdirectories.
For public shared directories,use
getExternalStoragePublicDirectory()
16. External Storage Contd…..
For cache files,use getExternalCacheDir()
All these are applicable for API level 8 or above
For API level 7 or below ,use the method;
getExternalStorageDirectory()
Private files stored in//Android/data/<package_name>/files/
Cache files stored in//Android/data/<package_name>/cache/
18. SQLite Databases
android.database.sqlite Contains the SQLite
database management classes that an application
would use to manage its own private database.
android.database.sqlite.SQLiteDatabase
Contains the methods for: creating, opening, closing,
inserting, updating, deleting and quering an SQLite
database.
19. android.database.sqlite - Classes
SQLiteCloseable - An object created from a SQLiteDatabase that can be
closed.
SQLiteCursor - A Cursor implementation that exposes results from a
query on a SQLiteDatabase.
SQLiteDatabase - Exposes methods to manage a SQLite database.
SQLiteOpenHelper - A helper class to manage database creation and
version management.
SQLiteProgram - A base class for compiled SQLite programs.
SQLiteQuery - A SQLite program that represents a query that reads the
resulting rows into a CursorWindow.
SQLiteQueryBuilder - a convenience class that helps build SQL queries
to be sent to SQLiteDatabase objects.
SQLiteStatement - A pre-compiled statement against a SQLiteDatabase
that can be reused.
20. OpenOrCreateDatabase
This method will open an existing database or create
one in the application data area
import android.database.sqlite.SQLiteDatabase;
SQLiteDatabase myDatabase;
myDatabase = openOrCreateDatabase ("my_sqlite_database.db" ,
SQLiteDatabase.CREATE_IF_NECESSARY , null);
21. Creating Tables
Create a static string containing the SQLite
CREATE statement, use the execSQL( ) method to
execute it.
String createAuthor = "CREAT TABLE authors (
id INTEGER PRIMARY KEY AUTOINCREMENT,
fname TEXT,
lname TEXT);
myDatabase.execSQL(createAuthor);