Tag Archives: Android

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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