circular imageview android with code examples

Circular ImageView in Android is a popular feature that is used in many Android applications. In this article, we will take a closer look at how to create a Circular ImageView in Android with code examples.

Firstly, let's understand what a Circular ImageView is? Circular ImageView is an image view that displays images in a circular shape. It is used widely in many applications as it looks more attractive and gives a modern look to the UI.

There are different ways to create a Circular ImageView in Android, but we will be discussing two popular methods which are:

• Using a third-party library called 'CircleImageView.'
• Creating a custom ImageView class.

Using CircleImageView Library

Step 1: Add CircleImageView Library to the project

Firstly, you need to add the CircleImageView library to your project. You can add this library by using the following dependency in the build.gradle file:

implementation 'de.hdodenhof:circleimageview:3.1.0'

After adding the dependency, you need to Sync your project to download the library.

Step 2: Adding CircleImageView in XML

After adding the dependency, you can add the CircleImageView in XML as follows:

<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/profile_image"
android:layout_width="96dp"
android:layout_height="96dp"
android:src="@drawable/profile_image"
app:civ_border_width="2dp"
app:civ_border_color="#FF000000"/>

Here, CircleImageView is added with an ID "profile_image" with a width and height of "96dp" and a source image of "profile_image." Moreover, the "app:civ_border_width" and "app:civ_border_color" attributes can be used for adding a border to the image.

Step 3: Loading Image in CircleImageView

To load the image into CircleImageView, you can use the following code in your activity or fragment:

CircleImageView profileImage = findViewById(R.id.profile_image);
Glide.with(this).load(R.drawable.profile_image).into(profileImage);

Here, we are using a popular image loading library called Glide to load the image into the CircleImageView.

Using Custom ImageView Class

Step 1: Create Custom ImageView Class

Firstly, you need to create a custom ImageView class that extends the ImageView class. This class is responsible for drawing a circular ImageView.

public class CircularImageView extends androidx.appcompat.widget.AppCompatImageView {

public CircularImageView(Context context) {
    super(context);
    init();
}

public CircularImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
}

public CircularImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
}

}

Here, we have created a custom ImageView class called "CircularImageView" that extends "AppCompatActivity."

Step 2: Creating a Path and Bitmap

In the init() function, we will create a path and a bitmap to draw the circular ImageView.

private void init() {
this.setScaleType(ScaleType.CENTER_CROP);
path = new Path();
bitmapPaint = new Paint();
bitmapPaint.setAntiAlias(true);
bitmapPaint.setDither(true);
bitmapPaint.setFilterBitmap(true);
borderPaint = new Paint();
borderPaint.setAntiAlias(true);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
radius = Math.min(w, h) / 2f;
bitmapShader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
bitmapPaint.setShader(bitmapShader);
borderWidth = borderPaint.getStrokeWidth();
verticalYPosition = h / 2;
horizontalXPosition = w / 2;
}

Here, we have initialized "path," "bitmapPaint," and "borderPaint."

We have also overridden the "onSizeChanged" function of the ImageView to calculate radius, create a BitmapShader, and set the bitmap shader on the bitmap paint.

Step 3: Drawing Circle in Custom ImageView

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int w = getWidth();
int h = getHeight();
if (borderWidth > 0) {
// Draw Border
borderPaint.setColor(borderColor);
canvas.drawCircle(horizontalXPosition, verticalYPosition, radius, borderPaint);

    // Draw Circle Background
    borderPaint.setColor(circleBackgroundColor);
    canvas.drawCircle(horizontalXPosition, verticalYPosition, radius - borderWidth, borderPaint);
}

// Draw Image
canvas.drawCircle(horizontalXPosition, verticalYPosition, radius - borderWidth * 2, bitmapPaint);

}

Here, we have overridden the onDraw() function to draw a circular ImageView. We have drawn the border, circle background, and image in the circle.

Step 4: Adding Custom ImageView in XML

After creating the custom ImageView class, you can add it in XML as follows:

<com.example.circularimageview.CircularImageView
android:id="@+id/circular_image_view"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/profile_image"
app:borderColor="@color/colorAccent"
app:borderWidth="2dp"
app:circleBackgroundColor="@android:color/white" />

Here, "CircularImageView" is added with an ID "circular_image_view," with a width and height of "100dp" and a source image of "profile_image." Additionally, "app:borderColor," "app:borderWidth," and "app:circleBackgroundColor" attributes are used for adding a border to the image.

Step 5: Loading Image in Custom ImageView

To load the image into the custom ImageView, you can use the following code in your activity or fragment:

CircularImageView profileImage = findViewById(R.id.circular_image_view);
Glide.with(this).load(R.drawable.profile_image).into(profileImage);

Here, we are using a popular image loading library called Glide again to load the image into the CircularImageView.

Conclusion

In this article, we have discussed two popular ways to create a circular ImageView in Android. The first method is by using the CircleImageView library, and the second method is by creating a custom ImageView class.

Both methods have their own benefits, and you can choose one according to your project requirements. A Circular ImageView in Android can elevate your app's UI and provide an immersive user experience.

Circular ImageView in Android is a popular feature that provides a modern look to the UI of Android applications. Let's dive deeper into both the methods mentioned above and understand the code in detail.

Using CircleImageView Library

CircleImageView is an excellent library that provides a simple way to create a Circular ImageView in your Android project. As mentioned above, the library can be easily added as a dependency in the build.gradle file. Once the library is installed, we can add the XML attributes described above to create a Circular ImageView.

One of the benefits of using the CircleImageView library is that it also allows us to add borders to the image that we want to display in the ImageView. We can change the color and width of the border easily by using the app:civ_border_* attributes.

Another benefit of using this library is that it provides a high level of compatibility with different versions of Android, from Android 2.3 (Gingerbread) to the latest Android version. This makes it an excellent option for developers who are creating applications for a wide range of devices.

Creating Custom ImageView Class

Creating a custom ImageView class allows us to have more control over how our ImageView looks and behaves. As mentioned above, we can create a custom ImageView class that extends the ImageView class and override several methods to draw a Circular ImageView.

The custom ImageView class works by drawing a circle, and then drawing the image inside that circle. We can customize the circle size and color to give it a unique look. Additionally, we can add a border to the circle by adjusting the properties of the borderPaint object and drawing a circle with borderWidth around the inside circle.

One of the benefits of creating a custom ImageView class is that it provides us the ability to create a completely custom design for our ImageView, rather than using a pre-built library. Additionally, we can easily reuse this custom ImageView class across different activities and applications.

However, compared to using CircleImageView, creating a custom ImageView class requires more work and code. It may not be an ideal solution for developers who want to create a Circular ImageView quickly.

Conclusion

Both methods allow us to create a Circular ImageView in our Android application. Choosing which method to use depends on the specific requirements of our projects. Using the CircleImageView library is an easy and efficient way of creating a Circular ImageView, while creating a custom ImageView class allows us to have more control and customization.

In summary, a Circular ImageView in Android can enhance the user experience of an application and elevate its visual appeal. Whether we use a pre-built library or create a custom ImageView class, it's an essential feature that can provide a modern look to our users.

Popular questions

1. What is a Circular ImageView in Android?
   A: A Circular ImageView is an ImageView that is designed to display images in a circular shape in an Android application.

2. What are the two methods to create a Circular ImageView in Android?
   A: The two popular methods to create a Circular ImageView in an Android application are: using a third-party library called 'CircleImageView' and creating a custom ImageView class.

3. How can we create a Circular ImageView using CircleImageView library?
   A: Firstly, we need to add the CircleImageView library as a dependency in the build.gradle file of our Android project. After that, we can add CircleImageView in XML and load the image using libraries like Glide.

4. How can we create a Circular ImageView using a custom ImageView class?
   A: Firstly, we need to create a custom ImageView class that extends the ImageView class. Then, we can override several methods to draw a Circular ImageView, such as onDraw() and onSizeChanged(). Finally, we can add it to XML and load the image using libraries like Glide.

5. What are the benefits of using CircleImageView library and creating a custom ImageView class?
   A: Using CircleImageView library provides a simple way to create Circular ImageView, allows us to add borders, and provides compatibility with different versions of Android. Creating a custom ImageView class provides more control and customization over the design of an ImageView and enables us to reuse it efficiently in different activities and applications.

Tag

"CircularImageView"