How to add a curved bottom to an ImageView in Android?

Use CrescentoImageView in your XML layout with the curvature attribute set to a value like 50dp, and optionally set gravity to bottom for top curves. It integrates like a standard ImageView but adds the curve automatically.

Crescento vs custom drawable for curves: which is better?

Crescento is faster for simple curves with XML attributes, but custom drawables offer more flexibility for complex shapes. Choose Crescento for quick setups, but for advanced effects, writing custom code might be necessary.

How to change gradient direction in Crescento?

Use the gradientDirection attribute with values like TOP_TO_BOTTOM or LEFT_TO_RIGHT in XML, as listed in the README, to control overlay gradients on CrescentoImageView.

Is Crescento compatible with Jetpack Compose?

No, Crescento is designed for traditional View-based XML layouts and does not support Jetpack Compose. For Compose, you'd need to implement curves using Canvas or other Compose APIs.

Can I use Crescento with image loading libraries like Glide?

Yes, since CrescentoImageView extends standard ImageView, you can use it with Glide or Picasso by setting the image source programmatically, and tint or gradients will apply as configured.

What Android versions does Crescento support?

It supports API level 11 and above, as indicated by the badge in the README, making it compatible with most older and newer Android devices.

Open-Awesome

Crescento

MITJava

An Android library that adds customizable curved bottoms to ImageViews and RelativeLayouts.

GitHub

1.3k stars154 forks0 contributors

What is Crescento?

Crescento is an Android library that adds curved bottom edges to ImageViews and RelativeLayouts, allowing developers to create visually appealing UI elements with minimal effort. It solves the problem of manually implementing complex curved designs by providing customizable components with attributes for curvature, tint, gradients, and gravity.

Target Audience

Android developers looking to enhance their app's visual design with curved view edges, particularly those working on media-rich or card-based interfaces.

Value Proposition

Developers choose Crescento for its simplicity, flexibility, and ease of integration—offering a declarative XML approach to curved designs without requiring custom drawing code.

Overview

Add curve at bottom of image views and relative layouts.

Use Cases

Best For

Creating profile headers with curved bottom edges
Designing card-based layouts with distinctive visual boundaries
Adding gradient overlays to images with curved containers
Implementing tinted image views with automatic color extraction
Building media-rich interfaces like cinema or gallery apps
Enhancing RelativeLayouts with curved decorative elements

Not Ideal For

Projects requiring complex, multi-sided curved designs beyond top or bottom edges
Apps built with modern UI frameworks like Jetpack Compose that don't use XML views
High-performance interfaces with many dynamically changing views where drawing overhead matters
Teams needing extensive, actively maintained libraries with frequent updates

Pros & Cons

Pros

Curved Design Simplification

Eliminates the need for custom drawing code by providing declarative XML attributes like curvature and gravity, making it easy to add elegant curves.

Flexible Tint Control

Supports automatic tint extraction from images or manual tinting with tintMode, enhancing visual appeal without extra image processing.

Gradient and Alpha Support

Offers gradient overlays with configurable directions and transparency control via tintAlpha, adding depth to UI elements.

Easy Integration

Can be added via Gradle from JitPack and used directly in XML layouts, fitting seamlessly into existing Android projects.

Cons

Limited Customization Scope

Only supports curves at the top or bottom with basic inward/outward directions, not arbitrary shapes or curves on other sides, which restricts creative designs.

Dependency on JitPack

Requires adding a third-party maven repository (JitPack), which can introduce reliability or security concerns for some development workflows.

Potentially Outdated

Last notable update appears to be around 2016 based on badges and copyright, so it may lack compatibility with newer Android features or best practices.

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