Start guide for android studio

Start guide for android studio


Android Studio is the official Integrated Development Environment (IDE) for Android app development, based on IntelliJ IDEA
.On top of IntelliJ's powerful code editor and developer tools, Android Studio offers even more features that enhance your productivity when building Android apps.


Download android studio and install.
https://developer.android.com/studio

1. Start a new Android Studio project.
 Click on ‘Start a new Android Studio project’. You will be moved on to a screen that asks additional details of the project.

 2. Give the application name under ‘Application name:’

3. Target Android Devices screen Here, we are adjusting the settings of the devices our Android app will run on. For each major update of the Android OS, the API level is incremented. Having a lower API level will target a higher number of devices. 
 
4. Selecting a preloaded Activity screen

In this section of the project configuration, select an Activity to be preloaded.

Activity can be defined as a page on the Android app. Like how websites have different pages, Android apps have Activities. Each activity has two files, the XML (.xml) file to design how it looks and the Java (.java) file to write code in that activity. By selecting an empty activity, all other activities can be included. This is why all our projects will start with an empty activity.

Select the Empty Activity and proceed.




5. Customizing the selected Activity

Here we are describing the activity we have selected. Android Studio will provide default values [Activity Name: MainActivity] and [Layout Name: activity_main].

Make sure to check the two options [Generate Layout File and Backwards Compatibility (AppCompat)].

When you click Finish, Android Studio will start building your app. Once all processes are finished, you’ll get the Android Studio Interface.



6.Android Studio Interface
 
Palette has all the elements to design an application. All buttons, text fields, textviews, imageviews and many more things are available here.

Click on the run button and that will take us to an AVD manager. Here, we have to set up our virtual device.


7. Set up a Virtual Device in Android Studio

A virtual device is some space in the memory that functions as a phone. We can have multiple virtual devices with different versions of Android OS running on it. This is helpful when testing your app for backward compatibility. Multiple devices can be used to debug instant messaging applications.

Click on ‘Create New Virtual Device’ and Android Studio will give you a lot more options to configure your Virtual Device.

AVD name is simply the name given to your virtual device. You can just let it be what it is, or give it a name to remember your configuration.

You also have to select the device to run the app on.

Let the remaining options be set to default and click on finish.


Now you have a virtual device set up and can use it to run the app. Once everything is set, Android Studio will take about a minute and then launch your virtual device. If it doesn’t already launch your App, click the run button again and this time the emulator will launch the app.

8. Java Folder

Expand your project folder on left side folder structure and find the java folder. It contains the java code of your application.
 Open MainActivity.java file.

You can add new activities for your project here.

Right click on your MainActivity.java file

→New →Activity This will add a new java file as well as the interface connected with this java file.



9. User Interface

Find the layout folder inside src folder.


This folder contains the user interfaces of your application. Initially it has the activity_main.xml file which is connected with the MainActivity.java file.

Once you open this xml file you will be able to see the interface on screen. You can edit this screen using the design view and text view.
 In design view you can drag and drop anything from the pallet.
Use the properties to do modifications to added items on screen.

If select text tab at the bottom of the mobile interface, your screen will be switched to the xml view of your user interface.
You can edit your interface from this xml view as well.


 Other important files in your project

AndroidManifest.xml: Every application must have an AndroidManifest.xml file (with precisely that name) in its root directory. The manifest file presents essential information about your app to the Android system, information the  system must have before it can run any of the app's code. drawable: Stores all the graphic files in your application. 


Thank you!
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2020 August 

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