How to create a Circular image view in Android without using any library? - Software Development PDF Download

How to Create a Circular ImageView in Android Without using Any Library?

This guide focuses on creating a Circular ImageView in Android without relying on external libraries within an Android Application. It demonstrates how to craft a Circular ImageView with a White Border and Transparent Content of any shape using Java and Kotlin programming languages for Android development.

Step by Step Implementation

Step 1: Creating the Layout of the Circular ImageView

Create a new Drawable Resource File in the Drawable Directory that outlines the shape of the ImageView as a Circle.

• Define a new XML file in the Drawable directory named "circular.xml" to specify the circular shape and its attributes.

Step 2: Making a LayerList Drawable

• Create a new XML file named image.xml in the Drawable Directory.
• Define a LayerList in the XML file to serve as a background for your ImageView.
• Within the LayerList, specify the images to be displayed on the circular ImageView.

Example:

In the image.xml file, you can set the circular image and the launcher icon to be displayed as layers on the ImageView.

Step 3: Creating the activity_main.xml

• Set up a RelativeLayout in the XML file with specific layout parameters.
• Place the previously created image.xml file as the background for your ImageView.

Example:

In the activity_main.xml file, the RelativeLayout is used to position the ImageView with the specified background image.

Step 4: Creating the Backend MainActivity File

• Java
• Kotlin

Let's delve into the process of creating the Backend MainActivity file in Java and Kotlin.

MainActivity Class Structure

In this section, we'll outline the structure of the MainActivity class:

• The MainActivity class extends AppCompatActivity in Android development.
• Within the MainActivity class, various components and functionalities are implemented.

Key Components

Now, let's explore the key components of the MainActivity class:

• ActionBar: Manages the visual representation of the app's top bar.
• ColorDrawable: Helps in setting the background color of the ActionBar.
• Toast: Displays a brief message to the user.

Functionality Overview

Next, we will discuss the functionality implemented within the MainActivity class:

• Setting the content view to 'activity_main' layout.
• Customizing the ActionBar by changing its background color.
• Displaying a Toast message to the user about a "Circular Image View" without using any external libraries.

By following these steps, you can effectively create the Backend MainActivity file in your Android application.

Code Snippet

Here is a snippet of the code for reference:

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