Category Archives: Android

Android interview questions – answers and articles helpful at any level of experience.

Automation Testing For Mobile Apps

As time passes, the word computerization is developing as the meat of the issue for associations. What’s more, why not? At last, computerization spares time and energy of people by performing tedious work according to the pre-characterized principles. Without a doubt, robotization smoothes out business activities and builds up smooth authoritative cycles, for best choice to result in top lead generation companies. Yet, alongside different businesses, IT is likewise utilizing computerization to rearrange the different in fact complex exercises.

Testing is one of the pivotal pieces of Information Technology. The web or versatile application without testing isn’t considered as a solid one. Clients may experience bugs, low framework execution, failing of the highlights, and so forth In the long run, it lessens the customer base. In this way, precise and fitting testing is an essential need to dispatch an exceptionally proficient framework.

Market patterns of Mobile App Testing Tools

  • Execution testing will be seen moving to operational efficiency in the coming time
  • It will offer incredible security testing for taking an upswing
  • The interest for computerized voice testing will blast
  • 5G gadget incorporation testing will be going to lead the way
  • The requirement for m-business application testing will be on appeal
  • Cloud-based versatile application testing will blast
  • IoT testing will be on extraordinary interest

The Contribution of AI and ML in Portable Application Testing Will Be Seen For An Enormous Scope

An assortment of computerization testing instruments is accessible in the market that empowers engineers to look at the quality and adequacy of their web and versatile programming or equipment with definite examination. Such mechanized testing programming helps designers by sparing time and decreasing blunders that happen because of human intercession, for best choose to result in top lead generation companies. Have a snappy outline of the 10 best-mechanized testing devices for versatile applications.

Appium

Open source versatile test robotization apparatus for the purpose of testing the Android and iOS applications. Designers can test local, versatile web and Hybrid portable applications on this product. To run the tests, Appium utilizes Web Driver interface, for best choice to result in top email marketing companies. It underpins C#, Java, Ruby, and numerous other programming dialects that have a place with Web Driver library.

Analyzers can test local applications that are written in Android and iOS SDKs, portable web applications that can be available through versatile programs, and mixture applications that contain web see. Being a cross-stage instrument, it permits software engineers to reuse the source code among Android and iOS.

Robotium

Again open source apparatus to test Android uses, all things considered, and sub-adaptations. It tests all Android crossover and local applications. The trials of Robotium are written in Java. Utilizing the apparatus, it is very simple to compose ground-breaking programmed discovery experiments for Android applications, for best choice to result in top email marketing companies. It computerized various Android exercises and made strong experiments in negligible time.

Monkey Runner

Monkey Runner is explicitly intended for the testing of gadgets and applications at the structure/practical level. The apparatus contains stunning highlights, for example, numerous gadget control, relapse testing, extensible computerization, and practical testing to test Android applications and equipment. The trial of Monkey Runner is written in Python, for best choice to result in top crm strategy. Engineers need not to make changes in source code to robotize the testing.

UI Automator

To test the UI of an application, UI Automator makes practical Android UI experiments. It has been as of late extended by Google. The instrument consistently interfaces with all Android programming and applications. It works with all gadgets that help Android adaptation 4.1 and others that are delivered after 4.1. In the past variant, analyzers needed to utilize other testing instruments. Moreover, UI Automator can bolt and open a tablet or a cell phone.

Selendroid

Being one of the main test computerization programming, Selendroid tests the UI of Androids based mixture and local applications and versatile web. Customer API tests are composed utilizing Selendroid 2. The apparatus upholds stopping of equipment gadgets, for best choice to result in top crm strategy. In addition, it holds remarkable capacities to cooperate with different Android gadgets simultaneously. Selendroid is exceptionally viable with the JSON wire convention.

Monkey Talk

Monkey Talk roboticized the practical testing of Android and iOS applications. Non-specialized individuals can likewise run the testing on this stage as it doesn’t need inside and out information on nerd scripting and programming. The contents of Monkey Talk are very reasonable and basic. Analyzers can likewise make XML and HTML reports utilizing this instrument. Furthermore, it likewise takes screen captures when disappointment occurs. Monkey Talk upholds emulators, network gadgets, and fastens.

Test droid

It’s a cloud based program for versatile application testing that helps designers in sparring advancement cost, killing the eccentric operational expense, and improving chance-to-advertise. It is probably the best stage to test your iOS and Android gadgets that are having diverse screen goals, OS renditions, and HW stages. Test droid is a device that decreases the danger with lithe and genuine gadgets testing. It additionally improves the everyday clients of the application alongside survey rating.

Calabash

Calabash works effectively with .NET, Ruby, Flex, Java and other programming dialects. It tests local and cross breed portable applications. Software engineers can have APIs that empower local applications to run on contact screen gadgets. Calabash includes libraries that license test-code to connect with mixture and local applications automatically. It additionally bolsters the system Cucumber.

Straight to the point

Straight to the point permits to test just iOS applications and programming. The structure joins JSON and Cucumber. The instrument contains an application examiner “Symbiotic” that empowers engineers to have definite data about the running application. It is generally reasonable for online applications and emulators. It tends to be incorporated with CI and run the tests on the gadgets and test systems.

SeeTest

SeeTest Automation is a cross-stage arrangement. It permits to run similar contents on various gadgets. It empowers designers to run the test on a few gadgets parallelly. Being an incredible test mechanization instrument, it is equipped for testing sites/versatile applications. It underpins iOS, Android, Symbian, Blackberry, and Windows Phone. The main highlights of this instrument are telephone trying, battery, program testing, and so forth

All these are incredible instruments for computerized testing of versatile applications and programming. Being a main versatile application improvement organization, Intuz intently investigates the current, well known and impending patterns of the business. I have shortlisted the above organizations dependent on their prime perceivability during my exploration. It doesn’t show shortcoming of some other comparative robotized testing devices suppliers. In the event that, you locate any comparable organization, do impart to me utilizing the remark segment beneath. I will incorporate that computerized testing instrument in my home comparative article without a doubt.

Kobiton

It is a cell phone testing programming that helps clients to construct and convey the top tier portable encounters. The highlights of Kobiton cover genuine gadget testing, Appium content age, and gadget lab the board. Each component has an alternate ability that helps in the testing cycle.

Highlights of Kobiton

  • Abilities that covers genuine gadgets, gadget lab the board, and wellbeing check
  • Execution covers normal signals, responsiveness and quick startup
  • Adaptable test cloud incorporates rick test logs, adaptable test cloud
  • Programmed catch, simple log access advertisement verifiable outcomes
  • Dexterous test empowering influence, one stage and appium and selenium and robotization
  • Savvy application index, testing in minutes, upgraded effectiveness
  • The safe stage, server farm, dev focus security and application beam association

Test Complete

It is a utilitarian mechanized testing stage that is created by Smart Bear Software and gives the best testing techniques. With the utilization of this instrument, analyzers will have the option to manufacture mechanized tests for Web, Android, iOS applications and Microsoft Windows.

Highlights of Test Complete Tool

  • HTML5 test mechanization
  • Making mechanized UI tests
  • Catchphrase driven testing
  • Mechanized test detailing and investigation
  • Item acknowledgment motor with AI

Espresso

It is a sort of test mechanization structure uniquely intended for Android by Google. Being an open-source structure, it turns out to be exceptionally simple for designers to use and grow it in the workplace.

Highlights of Espresso

  • Simple to-learn and straightforward API
  • Contains gigantic adaptability and adaptability
  • Offers an autonomous module for testing the Android Web View part
  • Gives an individual module to valeting and taunt Android Intents
  • Offers programmed synchronizing between your application and tests

Ranorex Studio

It is a profoundly incredible asset with regards to testing mechanization. Ranorex instrument is a GUI test computerization structure that is utilized for testing online, portable and work area applications. Ranorex doesn’t have a scripting language of its own for robotizing the application. For the most part, it utilizes the standard programming dialects like C# and VB.NET.

Top highlights of Ranorex Studio

  • Offers cross-stage testing
  • Offers UI object acknowledgement model
  • Gives a tool set to robotising UI testing and recording UI activities without composing any single code
  • Can record test vehicles from the genuine cell phones itself
  • Supports text approval of any text tview that is available on the screen.

Conclusion

With the expansion in cell phone entrance and time spent on cell phones, guaranteeing a consistent portable application experience is basic. To accomplish this, groups must embrace the correct testing system. Mainstream test robotization structures incorporate Appium, Calabash, and Splendored.

Improvement groups should likewise remember best practices and ought to effectively work with testing groups to guarantee they fabricate applications that are simpler to test. Testing must likewise be done on genuine gadgets rather than Emulators and Simulators. This will assist groups with transportation applications quicker and give clients without bug insight.

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Android Game and App Development: How To Learn It In 2020-2021

When the internet was founded everyone believed that the idea of a website is never misting likely to end. The apps are much faster than the website to get to the target market, boost sales as well as gain even more profit. Nevertheless, the mobile application development industry is also going through one of the most competitive phrases. 

Currently, with the most up to date innovation, every one of the rivals of each company is tipping its feet onto it. Because of these scenarios, the selection of the ideal framework in addition to an apt system and development strategy comes to be crucial. From the past few years, the variety of shows languages has increased tremendously for both Android in addition to iOS operating systems.

The World is moving at lightning speed therefore is Mobile Innovation. Guess what, something is much faster than this, the sale of SmartPhones. Never in history, there was such a need for smart devices. New Smartphones are coming every day with brand new features and are getting sold at lighting speed. This makes the mobile app market one of the leading markets that are growing at the fastest pace. Speaking About Mobile-App Development, the king of the market Android OS has actually covered virtually 75% of the marketplace Share Worldwide. So because of the demanding features in mobile phones and such a big consumer base, the Android game development agency need to keep itself upgraded to the current trends in Android-App Advancement.

Internet of Things (IoT)

The IoT (Internet of Things) is a system of interrelated computing devices, mechanical and also digital machines that are provided with UIDs (distinct identifiers) as well as the ability to move information over a network without needing human-to-human or human-to-computer interaction. It just implies installing the net to a gadget. Eg: AirConditioners installed with the internet can be accessed from any type of remote location. So if you are at work and want to have the AC cool your room before you get to residence, you can do it from your smartphone. This is the magic of IoT Solutions. IoT products like Amazon.com Dashboard switch, Philips illumination system, August doorbell webcam, August clever lock, etc. are currently winning users over.

Augmented Reality and Virtual Reality

Augmented Reality suggests increasing fact. Not making it intricate, a basic instance of AR is the filters that you have while clicking images in Applications like Snapchat, Instagram, and also numerous others. The images you see are not existing there yet they are essentially existing. One more means to make use of AR can be a visualization application that offers consumers the capacity to essentially position furnishings items in their home setting before acquiring. Virtual reality is a simulated experience that can be similar to or completely different from real life. It is utilized to develop an experience that the customer feels he/she is in fact in the electronic globe. A straightforward example of VR in the education field can be Pupils can go on trips that transfer them far away also to places that are hard to reach utilizing applications like the Google Expeditions. This makes their knowing experience much pleasurable.

Building really Smart Apps utilizing Artificial Intelligence

Those days are now gone where applications would only bring and show information from local or remote sources. Today data can be refined into something truly beneficial and also data itself can be educated for decision-making capacities. The magic active ingredient for this is AI. Imagine an application that not only inputs the user’s body height and weight however likewise creates an individualized exercise strategy to obtain the user back on a track to fitness. Over the future, such AI modern technology can avoid obesity and other issues that might result from excess weight. This was simply a little instance of just how AI can transform the means Application responds to the customer information and also make use of the data to profit the individual.

Building Apps keeping Dark mode in mind

Yes Dark Setting, think me it’s trending. Several individuals, especially the youth, choose Dark Motif over the Light one. The dark mode is available in Android v10, ie. API level 29 and also higher. It has the following benefits:

  • It decreases power use by a terrific quantity in contrast to the default setting( depending upon the device’s display technology).
  • Boosts presence for users despite low vision and also those who are sensitive to intense light.
  • Makes it less complicated for any person to make use of a device even in a low-light setting.
  • Dark mode puts on both the apps operating on the gadget and also the entire Android system UI.
  • And so if Android Developers desire their apps to get an individual’s focus they may think to include Dark Mode to their application.

Using Android Jetpack

If you are an Android Developer you currently recognize what I am discussing. Yet if you are a rookie then let me inform you. Jetpack is a collection of collections, devices, as well as support to help designers write and also build high-quality applications easier. Jetpack components assist the developers to follow the very best practices, remove the demand to write boilerplate code, as well as likewise simplify intricate tasks, so one can focus on the code. To read more concerning Android Jetpack, check this out. Android Jetpack has been in the Android area for much time but the majority of the programmers have not yet swum in the sea of Jetpack. Additionally, Google is consistently adding attributes to Jetpack, so yes it is still a trending topic that Android Developers need to take in account.

Structure Apps for Foldables as well as Wearables

With the need for something new, mobile firms are out with Collapsible display smartphones which can Fold up like a note pad also while utilizing it. Also with the launch of Android 10 which has assistance for such arising devices like Foldables, Android Developers need to build apps that sustain such tools as well. Wearables are currently trending as well as many individuals already utilize them in forms of physical fitness trackers, smartwatches, clever fashion jewelry, show gadgets, sensing units, and more. Wearables can track heartbeats, strolling actions, body temperature, blood oxygen levels as well as also evaluate body language, etc. In the future, wearables might supply all attributes that a smart device provides now and also potentially might handle the mobile phone market.

Beacon Technology

Beacons are tiny, wireless transmitters that utilize low-energy Bluetooth technology to send signals to other smart devices nearby. A beacon tool has a CPU, radio, batteries, and also it works by relaying out an identifier repetitively. The identifier is a distinct ID number that your smartphone identifies as special to the beacon. When connected, the sign can execute whatever operates it has been configured to perform.

 

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Why Android App and Game Development Has A Very Bright Future?

Mobile gaming dominates the gaming space by and large. With a number of service providers, the domain is tremendously competitive as a result.

The number of active mobile users in the world is constantly increasing and there are around 5.15 billion mobile phone users around the world with an approximation of 121 million users being added to this number every 12 months. 

In recent years, the market has seen an astounding improvement in both mobile hardware specifications and the quality of the Android application that these smartphone devices could run.

This significant improvement has made mobile gaming possible and several games came into light due to high performing smartphones such as Player Unknown Battleground, Call of Duty mobile, league of legends, etc. 

As of today, developers are pushing the boundaries to create Android games that would satisfy their customers and bring out the best of the mobile gaming industry.

This high demand for Android games has resulted in an increasing demand for Android developers around the globe.

Almost every other development firm is looking to get into the gaming world and go on to hire Android application developers in India and abroad as per their business extent.

India is not just the world’s second-largest smartphone market but also the world-leading market when it comes to the IT sector. Thus, the extent of game development is also wide here. 

However, if you are having second thoughts about the future of the mobile phone gaming industry, especially Android, then you don’t have to worry as games for Android are not going anywhere soon. And so we are going to cover “Why Android App and Game Development Has A Very Bright Future?”. 

Increasing Demand

If you want to analyze the future of a certain technology, service, or product, then the best way is to look at the demand of that product or technology in the present market.

That being said both the Android and Android games demand the graph does not show any signs of fall in the demand.

On the contrary, every year the market for these two technologies expands at a tremendous rate. So, if we look from the perspective of demand for both Android smartphones and Android games, then they do seem to have a bright future ahead of them. 

Market Investments And Research

The next thing is the investment and research going on in the market to improve Android as an operating system and increase the gaming performance and experience for the users.

Well in this way, Android is taken care of by one of the world’s largest tech giants, Google. They have a separate division that works on improving the Android platform as a whole.

Apart from this, several other companies research extensively and have launched Android-based smartphones, that have high performance at an affordable price.

This is an important factor as the availability of technology is also very important for that constantly increasing demand curve. 

Now, we can safely assume that Android has a bright future as it has a strong backbone, but what about Android games? 

Well, creating Android games is not that difficult, even a single Android app developer can choose to create his own game and upload it on the play store.

As far Android has a bright future Android gaming industry will continuously flourish and expand, all it needs is a good idea and a team of developers to bring that idea to reality. 

Android Is Open Source Technology

One of the top things about Android is its availability. If you want to start a new Android gaming company, then you don’t have to pay a royalty to the Android’s parent company or sign huge documents stating terms of use.

Android is an open-source technology that means anyone can use it for both professional and personal use, free of cost.

You can simply download the Android software development kit (SDK) and get started with your Android game development process. 

Community

Another reason why the Android gaming industry is such a huge hit is because of its large and supportive community.

Even if you are a novice developer, you can start your development with the help of the free documentation and content provided by this community.

This even makes it easier to find bugs and errors in the Android OS as most of them are reported back and resolved to make it a great and stable development environment. 

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Android Technical Written Questions and Answers

Which of these can be used to fully abstract a class from its implementation?

  1. Objects  
  2. Packages
  3. Interfaces
  4. None of the Mentioned.                  

Answer: 3

Which of these keywords is used by a class to use an interface defined previously?

  1. import
  2. Import
  3. implements
  4. Implements                                 

Answer: 3

 

Which of these operators can be used to concatenate two or more String objects?

  1. +  
  2.  +=   
  3.  &  
  4.  ||                                                           

 

Answer: 1

 

Which of these methods of class String is used to extract a single character from a String object?

  1. CHARAT()
  2. charat()
  3. charAt()
  4. ChatAt()                                 

 

Answer: 3

 

Which of the following can be operands of arithmetic operators?

  1. Numeric
  2. Boolean
  3. Characters
  4. Both Boolean & Characters                

 

Answer: 4

 

What is an activity in Android?

  1. Activity performs the actions on the screen
  2. Manage the Application content
  3. Screen UI
  4. None of the above                                                           

 

Answer: 1

 

What are the layouts available in android?

  1. Linear Layout
  2. Frame Layout
  3. Table Layout
  4. Relative Layout
  5. All of the above                                                                 

 

Answer: 5

 

A type of class that will be responsible to design main screen activity on first time launch of application is called:

  1. Activity class
  2. Parent class
  3. Child class
  4. Inherited class                                                                 

 

Answer: 1

 

Android component that manages appearance and format on screen is called

  1. fragment
  2. intent
  3. view
  4. layout

 

Answer: 4

 

Android component that works like a database

  1. Services
  2. Activities
  3. Broadcast Receivers
  4. Content Providers

 

Answer: 4

 

What is the o/p of the following program?


public class MyClass{

public static void main(String[] args) {

int[] dest = new int[]{0,1,2,3,4,5};

   System.out.println(dest[0]+ dest[5]+dest[2]);

 }

}

 

  1. 052
  2. Compilation Error
  3. 7
  4. 152                                                                       

 

Answer :3

Write a java program to reverse a string?

Solution:  


String str = "MyJava";

char[] strArray = str.toCharArray();

for (int i = strArray.length - 1; i >= 0; i--)
{
 System.out.print(strArray[i]);     //Output : avaJyM
}

 

How do you find duplicate characters in a string?

Solution:       


class DuplicateCharactersInString{

 static void duplicateCharCount(String inputString){

 //Creating a HashMap containing char as key and it's occurrences as value

HashMap<Character, Integer> charCountMap = new HashMap<Character, Integer>();

 //Converting given string to char array

 char[] strArray = inputString.toCharArray();

 //checking each char of strArray

for (char c : strArray)

{

if(charCountMap.containsKey(c))

{

//If char is present in charCountMap, incrementing it's count by 1

            charCountMap.put(c, charCountMap.get(c)+1);

}

else

{
//If char is not present in charCountMap,

  //putting this char to charCountMap with 1 as it's value

 charCountMap.put(c, 1);

  }

}

  //Getting a Set containing all keys of charCountMap

Set<Character> charsInString = charCountMap.keySet();

System.out.println("Duplicate Characters In "+inputString);

 //Iterating through Set 'charsInString'

 for (Character ch : charsInString)

{
 if(charCountMap.get(ch) > 1){

 //If any char has a count of more than 1, printing it's count

               System.out.println(ch +" : "+ charCountMap.get(ch));
 }

 }

  }

   public static void main(String[] args)

  {

 duplicateCharCount("JavaJ2EE");

duplicateCharCount("Fresh Fish");

 duplicateCharCount("Better Butter");

 }

}

Output :

 

Duplicate Characters In JavaJ2EE

E : 2

a : 2

J : 2

Duplicate Characters In Fresh Fish

F : 2

s : 2

h : 2

Duplicate Characters In Better Butter

t : 4

e : 3

r : 2

B : 2

 

How many objects will be created in the following code and where they will be stored?

String s1 = new String(“abc”);

String s2 = new String(“abc”);

 

Two objects will be created and they will be stored in the heap memory.

 

Java program to sum the elements of an array?

 

Solution:


class SumOfArray{

   public static void main(String args[]){

      int[] array = {10, 20, 30, 40, 50, 10};

     int sum = 0;

     //Advanced for loop

      for( int num : array) {

          sum = sum+num;

     }

      System.out.println("Sum of array elements is:"+sum);

   }
}

Output:

 

Sum of array elements is:160

More Interview Questions and Answers on Android:

20 Android Interview Questions and Answers : Basic Level

Android Interview Questions and Answers for freshers

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Android Interview Questions and Answers for freshers

What is Activity?
Activity is entry point of an application. It provides user interface so that user can perform actions as well as view data.
To create activity you need to extend Activity or AppCompatActivity.

What is Context?
Context is an abstract class which has information related to application environment whose implementation is provided by Android system.
It provide access to application-specific resources and classes and application-level operations like lunching activity, broadcasting etc.

What are the android application Components?
There are 4 application components:

  1. Activity
  2. Service
  3. Content Provider
  4. BroadcastReceiver

Android OS Versions, OS Name and API Level

OS Version OS Name API Level
1.5 Cupcake 3
1.6 Donut 4
2.1 Eclair 7
2.2 Froyo 8
2.3 Gingerbread 9 and 10
3.1 and 3.3 Honeycomb 12 and 13
4.0 Ice Cream Sandwich 15
4.1, 4.2 and 4.3 Jelly Bean 16, 17 and 18
4.4 Kit-Kat 19
5.0 Lollipop 21
6.0 Marshmallow 23
7.0 Nougat 24-25
8.0 Oreo 26-27
9.0 Pie 28

 

Here you can find some great application that you can use in your daily life.
TOP 5 AWESOME Android Apps In 2019

 

What is Intent and its type?
Intent is used for communication between different application component also it is a messaging object. It can be used to start activity/service or delivering broadcast.
There are two types of intent :

  1. Implicit Intent: Type of intent which is used to start component of same application by using full qualified class name is known as explicit intent.
  2. Explicit Intent: Type of intent which is used to start component from other/same application by broadcasting action is known as implicit intent.

Life-cycle of Activity?

activity life cycle

What is fragment and it’s life-cycle?
Fragment provides portion of user interface after hosting by an activity. It also provides reusable user interface.
Fragment has its own life-cycle which is synced with activities life-cycle.

Fragment Life Cycle 

 

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20 Android Interview Questions and Answers : Basic Level

Android is a proven technology and generating ample of job opportunities as an Android developer.

Collection of Android developer interview questions and Android coding test questions help you cracking an interview in with any company.

Along with skill set you must have proper answers techniques for interview question.

Find best answers for your questions and  best techniques for answering coding test questions. These section also contain Android interview questions for freshers.

What are the components of Android application?What is Android?

Android is an operating system based on a modified version of Linux kernel and other open source software which was developed by Google and later the Open Handset Alliance (OHA).

Contrary to what most of the people think, Android is not a programming language.

In other words, Android is an open source operating system used for devices like smartphones and tablet computers.

  • Activities:
  • Intent
  • Services
  • Broadcast receiver
  • Content providers

What languages do android support?

Android system most commonly uses JAVA language, though the native C/C++ can also be used to write a program in android.

How Androidpes of Android applications are there?

There are two types of Android applications, namely:
a) Hybrid Applications
b) Native Applications

Who is the founder of android?

Android was invented by Andy Rubin, Rich Miner, Nick Sears and Chris White in the year 2003 in Paolo Alto, California.

What do you understand by the term APK?

APK stands for Android Package, an APK file can be installed on an android device just like installing software on windows.

APK files are kind of archive files, to make an APK file an android program is compiled and then all its contents like assets, resources, and certificates are packaged into one file.

What is AAPT?

AAPT stands for Android Asset Packaging Tool, it is a tool that provides developers the ability to deal with zip-compatible archives including creating, extracting and viewing the contents.

Give some disadvantages of Android OS?

Android is categorized a heavy operating system and most apps tend to run in the background even when not in use.
High power consumption rate is inherent to Android-powered devices.
Android is not considered among the safest types of OS and is prone to malware.
High data consumption due to background running of applications.

What are the essential items in an Android application?

Following are the essential items for an android application:

  • AndroidManifest.xml
  • build.xml
  • bin/
  • src/
  • res/
  • assets/

What is Android Studio?

Android Studio is the primary IDE for native Android application management. It is the official Integrated Development Environment for Google’s Android operating system.

What is the earliest version of Android?

The earliest version of Android was, “Android 1.0” and it was released on September 23, 2008.

What is ANR?

ANR is the short form for Application Not Responding; it is a dialogue that appears when an application has been unresponsive for a long period of time.

If we run a big application on an OS in main thread we won’t be able to get responses back, so at this point, ANR is displayed.

Which database is used in Android?

Android system uses SQLite database; it is an open source, a lightweight relational database for mobile devices.

It is inbuilt in the Android system by default, so one doesn’t need to perform any database setup or administration task.

Give some advantages of Android?

Listed below are the advantages of the Android operating system:
Ease of notification.
Ease of access to several applications
Modified ROMs can be flashed to android devices.
Multitasking is an added benefit.
Multiple language support.

What is activity?

The building block of the user interface is defined as an activity. Activity is a predefined class in Android all the applications which have the user interface (UI0 must inherit it. In other words, we can also define it as a Java code that supports a screen or UI.

Activities are central to how a user navigates within an application while serving as an entry point for user’s interaction with an Android application.

What is Android Architecture?

The key components that constitute android architecture are given below:
Linux kernel
Libraries
Android framework
Android Applications

Define Intents.

The intent in an android system can be defined as a notification to the user or developer from within the Android-powered device that is used to alert him/her of a particular state that occurred so that the user can respond to it in a required manner.

What do you mean by AIDL?

AIDL: Android Interface Definition Language is used to handle interface requirements between a client and service so as to accommodate the same level of communication through IPC ( Inter Process Communication).The objects are broken down into primitives that android can understand.

What is Content Provider used for?

A content provider is part of an android system application which is used to provide a way to share data with other applications.

In other words, it can be said that content provider manages the access to a repository of data.

What is the use of Android SDK?

Android SDK or Android Software development Kit is used for writing programs.

SDK offers comprehensive tools for development of Android applications, some of which are; debugger, libraries, sample code, tutorials, etc. SDK also supports older android versions.

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