Hello world program in android studio
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Hello world program in android studio

gourav kumar October 06, 2022

 Hello world program in android studio

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Hello world program in android studio:- Let’s start android application development. In this tutorial we discuss about android projects folder and files like likes Java, res, manifest.xml etc which is used into a Android project.

Install Android Studio:-  First download the android studio on your system given below links. after complete the installation we starting a android projects.

Download Android Studio:-

1.      Windows 64-bits:-

1.    Exe file:- https://redirector.gvt1.com/edgedl/android/studio/install/2021.3.1.16/android-studio-2021.3.1.16-windows.exe 

2.     Zip File:- https://redirector.gvt1.com/edgedl/android/studio/ide-zips/2021.3.1.16/android-studio-2021.3.1.16-windows.zip

3.  Mac 64-bits:- https://redirector.gvt1.com/edgedl/android/studio/install/2021.3.1.16/android-studio-2021.3.1.16-mac.dmg

4. Mac 64-bit ARM:- https://redirector.gvt1.com/edgedl/android/studio/install/2021.3.1.16/android-studio-2021.3.1.16-mac_arm.dmg

5. Linux:- https://redirector.gvt1.com/edgedl/android/studio/ide-zips/2021.3.1.16/android-studio-2021.3.1.16-linux.tar.gz

6. Chrome OS:- https://redirector.gvt1.com/edgedl/android/studio/install/2021.3.1.16/android-studio-2021.3.1.16-cros.deb


Hello world Example:-

1.  Now after completion of installation of android studio then create a our first project in android studio. There is show templates likes Phone and Tablets, Wear OS , Android TV and Automotive. These all as per your requirement selected. In this we select a Phone a Tablet.  if you want activity on your project select Basic Activity type, Basic Activity(Material3) etc. and if you not want create any activity then select “No Activity”. In this project we select “Basic Activity” then click on next.

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      2. After click “Next” then shown new screen, in this screen 1. firstly write a “Project Name” like our project name is “Hello World Example” 2. Next,  second is write your package name. package name is write like “com.example.helloworld”. 3.  After next, you select a location of the project where to store. 4. After next, Selection of language like Java and Kotlin because that time Android application is develop in two language Kotlin and Java so you select as you like. for this project we select “Java” 5. After Next, Selection of Minimum version of Android SDK for your project.  6. After that click on the “Finish” button.

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       3. This is the final step for open a development tool for write a code

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      Analysis of Android Application:- 

              Before run android project, we learn about the directories and file that use in this Android project:-

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1.  Manifest:- This folder contain a AndroidManifest.xml file. Manifest file is describes the characteristics of your project and define the components of the android project. This is the root directory of the project. If you use any components in your project then require to declare that components in the manifest file if you not declare then manifest file is not consider that components for your project. Manifest file look like this:-
      
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     2.  Java:- Java folder contains the Main Activity that is .java extension file. There is the backend part of the android project. There developer write a functionality of design that  you create in activity.xml that locate at res/layout file. MainActivity file look like this:-
      
     
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     3. res/drawable:- This folder contains the different types of the images and icons of the project.  drawable folder contains different types of image inside this folder given below:-
            1.      drawable-ldpi:- Lower images quality supported by the earlier sets of the android – 240×320 pixels
            2.      drawable-mdpi (medium-density): For medium images support – 320×480 pixels      
            3.      drawable-hdpi(high-density): Images for the Android Broad Screen set or Android Phones with the Higher resolution – 480×800 pixels 
           4.      drawable-xhdpi(extra high-density): Devices with maximum resolution – 720×1280 pixels
     
     4.  res/layout:- In this folder contains the activity_main.xml file.This file contains the all the user interface components likes screen, textview, button, listview, Redio button, Toggle etc. There is you change frequently. In this file we write a code in xml. For your “Hello world” Application we use a text view. activity_main.xml look like as follows:-
      
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      5. res/values:- This folder contains the colors.xml and other is strings.xml. colors.xml file there you define the all the colors which is use in your app you define here. this file look like this:-
           
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       6. String.xml File:- string.xml file that contains the all the string that use in your project which is define here. so you can easily use in your project  for example you write a all text like button name, label name, default text etc. string.xml file look like as follows:-
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       7. Run Android Project:- Finally you run this application then show “Hello World” on the mobile screen look like this:-



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gourav kumar

Posted by: gourav kumar

I am B.Tech Engineer. I have experienced in Java Development and Android Development.

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