![\"Create](\"https:\/\/techvidvan.com\/tutorials\/wp-content\/uploads\/sites\/2\/2021\/06\/Create_Project1.png\")
<\/a><\/p>\nStep 3: Selecting Activity from New Project Tab.<\/h4>\n
You can see a variety of available activities in front of you. You need to select \u201cEmpty Activity\u201d and proceed. There are options even to create apps for Wear OS and Android TV.<\/p>\n
You would be available with several options, as shown below. You need to provide these details to create your empty activity. Let\u2019s see each field.<\/p>\n You need to provide your application name here. In our case, it is \u201cTechVidvan HelloWorld.\u201d You can provide space in between the words.<\/p>\n If you are working for an organization, you can keep the company domain as a package name. Otherwise, you can proceed with the default form, which \u201ccom.example.your_app_name\u201d.<\/p>\n You can select your location wherever you want to save this project.<\/p>\n Select Kotlin.<\/p>\n Select API 22, which Android Lolipop. You are advised to use an android version that covers more than 90% of the users.<\/p>\n Wait for the project to build and the files to load. After the files have loaded, the screen would appear something like below:<\/p>\n On the left side, you can find the project structure. Using the project structure, you can navigate through the project files.<\/p>\n On the left side, click on the manifest file, and it will load the AndroidManifest.xml file for you. (App —> Manifest —> AndroidManifest.xml)<\/p>\n Manifest describes the various components of Android like Activity, Services, etc. It also contains the app name and app logo and allows you to declare permissions.<\/p>\n <\/p>\n You can locate the Gradle files on the left-side navigation.<\/p>\n App—> Gradle Scripts —> build.gradle<\/p>\n We mainly deal with two types of Gradle files. One is the project level Gradle file and the other being the app level Gradle files. These Gradle files actually contain the dependencies of the various libraries.<\/p>\n We use XML to design the user interface or the layout of the various activities or fragments. You can see the design window. Here you can drag and drop elements.<\/p>\n Click on the Code option to get the chance to code the layout. Now, this completes the steps to create a project in Android.<\/p>\n Now let\u2019s see how you can connect your device to your android studio.<\/p>\n To connect your device to Android Studio, you need to enable USB Debugging on your device. Follow the steps to do that.<\/p>\n Open your device Settings<\/p>\n Click on About Phone<\/p>\n Click on Build options 2-3 times.<\/p>\n You will get a Toast that \u201cYou are now a Developer.\u201d<\/p>\n Now locate developer options in your settings and then enable USB Debugging.<\/p>\n Now connect your device with a USB cable<\/p>\n You can see your phone detected at the top bar.<\/p>\n It doesn\u2019t matter whether you have an Android device or not. Android studio provides you a feature to create your own Android Emulator. The emulator works similar to an Android Device and can support all types of Android Applications.<\/p>\n Let\u2019s see how to set up our own android emulator.<\/p>\n First open AVD Manager from the top menu bar. It will look like below.<\/p>\n Now click on \u201c+ Create Virtual Device.\u201d<\/p>\n Select Category as Phone and Select Pixel 2 or any of your desired models. Click on Next.<\/p>\n Now,\u201d you need to select the Android version you wish to install. When the article is written, the latest version is Android R. Hence we will go with it.<\/p>\n Just click on Download and proceed.<\/p>\n You can notice a window opened named \u201cComponent Installer.\u201d It will download the android tools, components and install them on your virtual device.<\/p>\n After the installation is done, the package click on Finish.<\/p>\n You need to now select your downloaded system image(which is android R) and proceed.<\/p>\n Give your virtual device a name and click on the finish\u2014no need to change other settings for now.<\/p>\n <\/p>\n Now your emulator is successfully installed. To test your emulator, install just press on the run button present in actions.<\/p>\n So, below is how your android emulator would look like.<\/p>\n Now, as we have already set up our project, move on to activity_main.xml.<\/p>\n You can see by default a text view created containing the text \u201cHello World.\u201d<\/p>\n Just scroll below, and you can locate an attribute named android: name = \u201cHello World.\u201d<\/p>\n Change this with your desired text.<\/p>\n (Code: activity_main.xml)<\/strong><\/p>\n After this, all, come back to your MainActivity.kt. This activity is the first screen visible to the user and using this screen, the user can interact.<\/p>\n Just make sure that your MainActivity is bound with your activity_main.xml layout.Your MainActivity.kt file should look like below:<\/p>\n (Code: MainActivity.kt)<\/strong><\/p>\n After you are done with these then now you are ready to test your app.<\/p>\n You can either select your android device or emulator from the top menu bar. After you have chosen your desired device, just go ahead to press the run button. It will install the application on your device.<\/p>\n For your device, your application will appear as follows:<\/p>\n In your emulator, the application would appear as follows:<\/p>\n<\/a><\/p>\nStep 4: Configuring your Activity<\/h4>\n
Name –<\/h5>\n
Package Name:<\/h5>\n
Save Location:<\/h5>\n
Language:<\/h5>\n
Minimum SDK:<\/h5>\n
<\/a><\/p>\nStep 5:<\/h4>\n
<\/a><\/p>\nStep 6:Project Structure<\/h4>\n
Step 7: Android Manifest File<\/h4>\n
Step 8: Gradle Scripts<\/h4>\n
App Level Gradle File:<\/h4>\n
<\/a><\/p>\nProject Level Gradle File:<\/h4>\n
<\/a><\/p>\nStep 9: XML Layout Files<\/h4>\n
\nGo to res —> Layout —> activity_main.xml<\/p>\n<\/a><\/p>\n<\/a><\/p>\nSteps to Connect your Device to Android Studio<\/h3>\n
Step 1:<\/h4>\n
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<\/a><\/p>\nStep 6:<\/h4>\n
Step 7:<\/h4>\n
<\/a><\/p>\nSteps to Install Emulator in Android Studio<\/h3>\n
Step 1:<\/h4>\n
<\/a><\/p>\nStep 2:<\/h4>\n
Step 3:<\/h4>\n
<\/a><\/p>\nStep 4:<\/h4>\n
<\/a><\/p>\nStep 5:<\/h4>\n
<\/a><\/p>\nStep 6:<\/h4>\n
<\/a><\/p>\nStep 7: Virtual Device Configuration<\/h4>\n
<\/a><\/p>\nStep 8:<\/h4>\n
<\/a><\/p>\nStep 9:<\/h4>\n
<\/a><\/p>\n<\/a><\/p>\nCreating a Hello World Program in Android<\/h3>\n
Step 1:<\/h4>\n
<\/a><\/p>\nStep 2:<\/h4>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\n xmlns:tools=\"http:\/\/schemas.android.com\/tools\"\n android:layout_width=\"match_parent\"\n android:layout_height=\"match_parent\"\n tools:context=\".MainActivity\">\n\n <TextView\n android:layout_width=\"wrap_content\"\n android:layout_height=\"wrap_content\"\n android:text=\"Hello World! From TechVidvan\"\n app:layout_constraintBottom_toBottomOf=\"parent\"\n app:layout_constraintLeft_toLeftOf=\"parent\"\n app:layout_constraintRight_toRightOf=\"parent\"\n app:layout_constraintTop_toTopOf=\"parent\" \/>\n\n<\/androidx.constraintlayout.widget.ConstraintLayout>\n<\/pre>\n
Step 3:<\/h4>\n
package com.example.techvidvanhelloworld\n\nimport androidx.appcompat.app.AppCompatActivity\nimport android.os.Bundle\n\nclass MainActivity : AppCompatActivity() {\n override fun onCreate(savedInstanceState: Bundle?) {\n super.onCreate(savedInstanceState)\n setContentView(R.layout.activity_main)\n }\n}\n<\/pre>\n<\/a><\/p>\nTesting your Application both on Android and Emulator<\/h3>\n
<\/a><\/p>\n