Fragments in Android- TecOrb Technologies

A fragment represents a conduct or a part of user interface in an activity. You can integrate more than one fragment in a single activity to build a multi-pane UI and reuse a fraction in multiple activities. you may consider a fragment as a modular phase of an activity, which has its personal life cycle, receives its very own enter events, and which you may upload or dispose of even as the interest is walking (kind of like a “sub interest” that you may reuse in exclusive sports).

Following are crucial points about fragment −

  • A fragment has its very own layout and its own behaviour with its personal life cycle callbacks.
  • You may add or do away with fragments in an interest whilst the interest is strolling.
  • You may integrate multiple fragments in an unmarried hobby to construct a multi-plane UI.

 frag

A fraction can be utilized in multiple activities.

  • Fragment life cycle is closely associated with the life cycle of its host interest which means when the pastime is paused, all the fragments available in the hobby will also be stopped.
  • A fraction can put into effect a behaviour that has no person interface aspect.
  • Fragments were added to the Android API in Honeycomb model of Android which API version eleven.
  • You create fragments via extending Fragment elegance and you can insert a fraction into your hobby layout by way of affirming the fragment inside the hobby’s format document, as a <fragment> detail.
  • Prior to fragment introduction, we had a difficulty because we will display only a single hobby on the display screen at one given factor in time. So we had been not capable of divide device display and control extraordinary components one by one. However with the introduction of fragment we got greater flexibility and removed the difficulty of having a single activity on the display screen at a time. Now we will have a single pastime however every interest can incorporate of more than one fragments in order to have their own format, occasions and entire life cycle.

Right here is the listing of techniques which you can to override for your fragment magnificence

  • onAttach():The fragment example is related to an interest example. The fragment and the hobby aren’t always fully initialized. Generally you get on this approach a connection with the interest which makes use of the fragment for similarly initialization paintings.
  • onCreate(): The device calls this technique when developing the fragment. You have to initialize critical components of the fragment which you need to keep when the fragment is paused or stopped, then resumed.
  • onCreateView(): The system calls this callback while it is time for the fragment to attract its person interface for the primary time. to draw a UI on your fragment, you need to go back a View issue from this technique that is the foundation of your fragment’s format. you may return null if the fragment does no longer provide a UI.
  • onActivityCreated(): The onActivityCreated() is referred to as after the onCreateView() method whilst the host hobby is created. Activity and fragment example have been created in addition to the view hierarchy of the activity. At this point, view may be accessed with the findViewById() method. Example. on this approach you may instantiate objects which require a Context object
  • onStart(): The onStart() technique is known as once the fragment gets visible.
  • onResume(): Fragment turns into lively.
  • onPause(): The device calls this technique because the first indication that the person is leaving the fragment. this is generally where you need to dedicate any modifications that must be endured beyond the modern-day person session.
  • onStop(): Fragment going to be stopped by using calling onStop()
  • onDestroyView():Fragment view will smash after call this technique
  • onDestroy(): onDestroy() known as to do very last smooth up of the fragment’s state however no longer assured to be referred to as by using the Android platform.

How to use Fragments?

  • This involves wide variety of simple steps to create Fragments.
  • To begin with determine what number of fragments you need to apply in an activity. as an instance permit’s we need to apply fragments to address landscape and portrait modes of the device.
  • Next based totally on number of fragments, create instructions to be able to amplify the Fragment class. The Fragment class has above noted callback capabilities. you could override any of the functions based totally to your requirements.
  • Corresponding to each fragment, you’ll need to create layout files in XML record. Those files may have format for the defined fragments.
  • Eventually adjust activity document to outline the actual good judgment of changing fragments based totally to your requirement.

Forms of Fragments

  • Basically fragments are divided as three ranges as proven underneath.
  • Single body fragments− single frame fragments are using for hand keep devices like mobiles, right here we can show best one fragment as a view.
  • List fragments − fragments having special listing view is called as list fragment
  • Fragments transaction− The usage of with fragment transaction. We are able to flow one fragment to any other fragment.

About Intents in Android

Intents are asynchronous message which allow application components to request functionality from other Android components.

The dictionary meaning of Intent is Intention or purpose. So it can be described as the intention to do action.

Android intent is the message that is passed between components such as content providers, activities, broadcast recievers, services etc.

Android Intents are mainly used to:

  • start a service
  • dial a phone call
  • Broadcast a message
  • Display a list of contacts
  • Display a web page

The LabeledIntent is the subclass of android.content.Intent class.

An intent can contain data via a Bundle. This data can be used by the receiving component.

In Android the reuse of other application components is a concept known as task. An application can access other Android components to achieve a task.

Starting activities or services:

To start an activity you have to use a method startActivity().This method is defined the Context object which Activity extends.

The following code demonstrates how you can start activity via intent.

Intent i = new Intent (this,Login.class);

startActivity(i);

Activities which are started by other android activities are called sub-activities. To start a service via intents, use the startService(Intent) method call.

Types of Android Intents:

There are two types of Intents in android which are as follows:

  • Implicit Intent
  • Explicit Intent

Implicit Intent:

These Intents do not name a target and the field for the component name is left blank. Implicit Intents are also used to activate components of other activities.

For example-

Intent i= new Intent();

i.setAction(android.content.Intent.ACTION_VIEW);

i.setData(ContactsContracts.CONTENT_URI);

startActivity(i);

Explicit Intent:

Explicit intent going to be connected intenal world of application. Explicit Intent specifies the components. In such case,intent provides the external class to be invoked.

For example-

Intent i= new Intent();

startActivity(this,First.class));

Let’s see a simple example of Intent that take from one activity to another activity.

First Activity XML:

code 1

code 1.1

Second Activity XML:

code1

First.java

fist

In above example, there are two xml activity in which first is our main and login activity in which we take two edit text for email and password and a login button to submit the data by which on click we reach at the other activity where we take an edit text and show welcome as a text.

With the help of java we write code and by intent we connect two activities as first activity with the second.

Also Read- Model View Controller (MVC) Pattern

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Services in Android- TecOrb Technologies

A service is part that runs inside the background to perform long-walking operations while not having to have interaction with the user and it works despite the fact that utility is destroyed. A service can basically take two states −

Sr. No. State & Description
1 Began

A service is commenced whilst an application factor, inclusive of an pastime, starts offevolved it by way of calling startService(). once commenced, a provider can run inside the history indefinitely, even though the thing that commenced it is destroyed.

2 Bound

A service is a bound when an application aspect binds to it with the aid of calling bindService(). A certain provider offers a customer-server interface that lets in additives to have interaction with the service, ship requests, get results, or even accomplish that throughout strategies with interprocess verbal exchange (IPC)

                                          Service Life Cycle

  • A service has life cycle callback methods that you may implement to monitor changes inside the provider’s country and you may carry out paintings at the appropriate level. the subsequent diagram at the left indicates the lifestyles cycle whilst the service is created with startService() and the diagram at the right suggests the existence cycle whilst the provider is created with bindService():

 Service life cycle diagram:

Untitled2

  • To create an service, you create a Java elegance that extends the service base class or one in every of its present subclasses. The service base magnificence defines numerous callback techniques and the maximum vital are given under. You do not want to enforce all of the callbacks strategies. however, it is vital that you apprehend each one and implement those that make sure your app behaves the manner users assume.

Callback & Description

  • onStartCommand(): The gadget calls this approach whilst any other thing, along with an interest, requests that the provider be commenced, by calling startService(). if you put in force this technique, it’s miles your responsibility to forestall the carrier whilst its paintings is achieved, with the aid of calling stopSelf() or stopService() techniques.
  • OnBind(): The gadget calls this technique when every other issue wants to bind with the carrier by calling bindService(). if you implement this method, you must provide an interface that customers use to speak with the carrier, through returning an IBinder object. You must always implement this approach, but in case you do not need to allow binding, then you definately should return null.
  • onUnbind(): The gadget calls this approach whilst all clients have disconnected from a particular interface posted with the aid of the service.
  • OnRebind(): The gadget calls this technique when new customers have related to the service, after it had previously been notified that all had disconnected in its onUnbind(reason).
  • onCreate(): The gadget calls this approach while the provider is first created using onStartCommand() or onBind(). This name is required to carry out one-time set-up.
  • OnDestroy():The system calls this approach while the carrier is not used and is being destroyed. Your provider should implement this to easy up any assets consisting of threads, registered listeners, receivers, etc.

Varieties of android Services

    Services in Android are components which run within the historical past. They do no longer have any person interface. One utility can begin a provider and the Service can run within the background although this application is switched with a new application via the user. There are two styles of offerings namely-

 Unbound service:   it is a form of service which runs in the history indefinitely, even though the activity which commenced this carrier ends.

sure carrier.

Bound Service: it’s miles a type of Services which runs till the lifespan of the interest which commenced this service.

Also Read- Tab Bar Controller In Swift iOS

If you are, looking to Develop and design for your project then feel free to contact us at any time

Call Us- +91 9910781148, +1 8033353593

Email: company@tecorb.com

Skype- tecorb

“We maintain transparency with our customers. Our values and business ethics has given us repeated customers. We tend are proud to be a reliable outsourcing partner for many clients across the World.”

Swift Tips for Those Getting Started

Start developing iOS Apps (Swift) is that the excellent start line for learning to make apps that runs on iPhone and iPad. Get through this set of progressive lessons as a target-hunting introduction to putting together your initial app-including the tools, major ideas, and best practices that may ease your path.

Each chapter contains a tutorial and also the abstract info you wish to complete it. The teachings hinge on one another, walking you thru a step-wise method of making an easy and Real-world iOS app.

As you create your means through the teachings and build the app, you’ll study ideas in iOS app development, gain a deeper understanding of the

Swift programming language, and inform yourself with the numerous valuable options of Xcode, Apple’s integrated development surroundings (IDE).

Since its 1.0 release in September 2014, Savvy Apps’ development team has been experimenting with and using Swift in iOS projects.

Though the majority of our current projects remain in OC (Objective-C) because of the relative youth of Swift, we have started coding new projects in Swift since its 2.0 release in September 2015.

Swift Tips for Those Getting Started

ios-apps-development-comapmy

Clean Up Asynchronous Code

Swift had got a neat syntax for writing off the completion functions. We had completion blocks in the Objective-C, but they were delayed in the language’s development process.

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Control Access to Our Code

We should always use the appropriate access control modifier to encapsulate the code. Good encapsulation helps us to understand how pieces of code interact with each other.

sw

Perform experiment and validation

Playground is an interactive and easy coding environment in Swift. We can also create playgrounds in order to test and validate the ideas, learn Swift and share concepts to each other.

ios-application-develoment

Leave NSNumber Behind

Here the Objective-C uses the C primitives for numbers, also the Foundation Objective-C API provides the NSNumber type for boxing and unboxing the primitives as well.  We can actually add Int / Float / AnyObject values for Swift dictionaries and array.

The most common Swift type that are used instead of NSNumber:

Swift: Objective-C

Int: [NSNumber integerValue]

UInt: [NSNumber unsignedIntegerValue]

Float: [NSNumber floatValue]

Bool: [NSNumber boolValue]

Double: [NSNumber doubleValue]

Download

downlad

To download the latest version of Xcode

-Open the App Store app on your Mac (by default it’s in the Dock).

-In the SF (search field) in the top-right corner, type Xcode and press the Return key.

-The Xcode app shows up as the first search result.

-Click Get and then click Install App.

-Enter your Apple ID and password when prompted.

-Xcode is download into your Application directory.

Conclusion

ios-apps

Here in Swift we had used may update classes and methods from time to time. We need to choose the correct development methodology so that we can develop more secure and flexible application.

As the Apple CEO said, “The sidelines are not where you want to live your life. The world needs you in the arena.” Its’s just the beginning for better future and technology advancement.

We TecOrb Technologies Pvt Lmt is the best company for mobile and web application development. If you want to developed any application for mobile and web and you have any query regarding this then you contact us by our website http://tecorb.com and you also call us

Call Us- +91 9910781148, +1 8033353593
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Skype- tecorb

Android application development company- Tecorb Technologies

Being a popular mobile OS, there is no doubt that android founds full number when once it involves safety and security. There is a multiple-layer for security protection that has been embedded in it for its usage across a range of platforms. Android protect to saved data of all its users. Well, the protection is not solely created for shielding user’s data, however conjointly for developers for a strong android apps development.

To help the android developers create the android apps development method make the more secure, we suggest some basic security practices.

android-mobile-application-development

Store All Data In Private Mode: If you utilize Open File input, then it is counseled to store all the information within the internal storage area. All the files, that you produce, are accessed here by line of work AN application. Storing the information in SD card is strictly not offer to allow. In case, you do not have any options left, encrypt all the information before you begin the storage method.

Broadcast Data With in The Process: Local Broad cast Manager helps and offers you to share the data within the apps. No matter information you broadcast gets keep in your apps. Hence, you are doing not thought to worry regarding information leak. No different application will send your broadcasts to the apps, therefore let go any risk of security loopholes.

Authenticate The Caller’s Package Name: Before you begin process the intent, it is more important to certify the package of the caller. Please remember in mind that only those broadcasters who are allowed this permission will tag the Android Manifest.XML file. This may make sure that your application is safe from any kinds of virus or malicious attacks. So as to enforce permission, a developer will provide a non-null permission where as registering the receiver.

Always Set The Exported Flag As False: keep in mind that the default price depends on the intent filters. To invoke it, use its precise category name. The attribute not solely restricts the exposure to alternative applications; in fact, it also offers or allows you to put a limit to the external entities, which might move with the service as well. In fact, the permission may be accustomed to stop any external entity from interacting with the service.

Android Application Sandbox protects all your data and information apps or codes from being accessed.

android-development-satik

Security is primary in each operating system (OS) even within the case of an android. Adopting the above-mentioned measures can assist you to keep maintain an error-free database and at the equivalent time ensure more or more apps security.

If you are search for an android apps development solution for your business, then we are just the right persons to contact with.

If you can want to develop security apps on android then you contact with us Tecorb Technologies. Tecorb Technologies is the best leading company in India, USA, UK and some other country. Tecorb Technologies is the best company because we give all application to the clients in time and we full fill all requirements of clients and users.