Round Corner ImageView in Android: An Ultimate Guide with Code Examples
In the world of mobile app development, images play a crucial role in making the app visually appealing. However, it's not uncommon to see images with harsh edges, especially when using ImageViews. To mitigate this, developers can use a round corner ImageView, which makes the image appear softer and visually appealing. In this article, we'll explore the different ways to achieve rounded corner ImageView in Android.
Before we dive into the code, let's understand what an ImageView is. An ImageView is a view that displays an image. It's one of the most commonly used views in Android development. An ImageView can display an image from a drawable resource file or from a URL. The ImageView has various properties that can be customized, including the scale type, padding, and background color.
To create a round corner ImageView, you can use several methods, including creating a custom drawable, using libraries, or using the Android XML. Let's take a look at each of these methods in detail.
Method 1: Creating a Custom Drawable
The first method is to create a custom drawable that has rounded corners. This method requires a bit of code, but it's flexible and can be used to create any shape you want. To create a custom drawable, you need to extend the Drawable class and override the draw method. In the draw method, you'll use the canvas to draw the image and the paint to specify the color and style. To create rounded corners, you'll need to use the RectF and the roundedRect method.
Here's an example of how to create a custom drawable with rounded corners:
public class RoundedCornerDrawable extends Drawable {
private final Bitmap mBitmap;
private final Paint mPaint;
private final RectF mRectF;
private final int mBitmapWidth;
private final int mBitmapHeight;
private final float mCornerRadius;
public RoundedCornerDrawable(Bitmap bitmap, float cornerRadius) {
mBitmap = bitmap;
mRectF = new RectF();
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
final BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint.setShader(shader);
mBitmapWidth = mBitmap.getWidth();
mBitmapHeight = mBitmap.getHeight();
mCornerRadius = cornerRadius;
}
@Override
public void draw(Canvas canvas) {
canvas.drawRoundRect(mRectF, mCornerRadius, mCornerRadius, mPaint);
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
mRectF.set(bounds);
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mPaint
Method 2: Using Libraries
Another way to create a round corner ImageView is by using libraries. There are many libraries available that make it easy to add rounded corners to an ImageView. Some of the most popular libraries include Picasso, Glide, and Fresco. These libraries provide methods to load images into ImageViews and also allow you to apply transformations to the images, including rounded corners.
Picasso is a powerful image loading library that allows you to easily add rounded corners to an ImageView. Here's an example of how to use Picasso to load an image with rounded corners:
Picasso.get().load(imageUrl)
.transform(new RoundedCornersTransformation(30, 0))
.into(imageView);
Similarly, Glide also provides an easy way to add rounded corners to an ImageView. Here's an example of how to use Glide to load an image with rounded corners:
Glide.with(this)
.load(imageUrl)
.transform(new RoundedCorners(30))
.into(imageView);
Fresco is another popular image loading library that provides an easy way to add rounded corners to an ImageView. Here's an example of how to use Fresco to load an image with rounded corners:
SimpleDraweeView simpleDraweeView = findViewById(R.id.my_image_view);
RoundingParams roundingParams = RoundingParams.fromCornersRadius(30f);
roundingParams.setRoundAsCircle(false);
simpleDraweeView.getHierarchy().setRoundingParams(roundingParams);
simpleDraweeView.setImageURI(imageUri);
Method 3: Using Android XML
The third method to create a round corner ImageView is to use Android XML. You can use the `shape` drawable to define the rounded corners for your ImageView. A `shape` drawable is an XML file that defines a geometric shape, including colors and borders. You can use the `shape` drawable to create a rounded rectangle and then set it as the background for your ImageView.
Here's an example of how to create a `shape` drawable with rounded corners:
You can then use this drawable as the background for your ImageView:
Conclusion
In this article, we've explored the different methods to create a round corner ImageView in Android. You can choose the method that best suits your needs and provides the desired result. Whether you choose to create a custom drawable, use a library, or use Android XML, the result will be a visually appealing ImageView with rounded corners.
## Popular questions
1. How do you create a round corner ImageView in Android?
There are several methods to create a round corner ImageView in Android, including creating a custom drawable, using a library, and using Android XML. Each method provides different ways to achieve the desired result and provides different levels of customization and flexibility.Failed to read response from ChatGPT. Tips:
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### Tag
UI/UX.
