Picasso
A powerful image downloading and caching library for Android.
Apache-2.0
Quick Start
Maven Coordinates
com.squareup.picasso:picassoSetup Steps
- Add the Picasso dependency to your build.gradle file using the Maven coordinates.
- Initialize Picasso in your Application class or Activity, typically with Picasso.get().
- Use Picasso.get().load(url).into(imageView) to load images.
Overview
Picasso is a widely-used image loading library for Android that simplifies the process of downloading, caching, and displaying images from various sources. It handles image resizing, transformations, and memory management efficiently.
Features
✓Simple and easy-to-use API
✓Automatic memory and disk caching
✓Image transformations (e.g., resize, crop, rotate)
✓Placeholder and error image support
✓Network resilience with retry logic
Use Cases
●Loading images from URLs in lists or grids
●Displaying profile pictures or avatars
●Caching images to reduce network usage
When Not to Use
✗Applications requiring advanced image processing or GIF support
✗Projects using Jetpack Compose exclusively (consider Coil instead)
✗When minimal library size is critical (Picasso adds overhead)
Usage Examples
Load Image from URL
Picasso.get().load("http://example.com/image.jpg").into(imageView);Basic usage to load an image into an ImageView.
Add Placeholder and Error Images
Picasso.get().load(url).placeholder(R.drawable.placeholder).error(R.drawable.error).into(imageView);Set placeholder while loading and error image on failure.
Common Pitfalls
- Memory leaks if context is not managed properly
- Limited support for animated images like GIFs
- Deprecated methods in newer Android versions
Integration
Works well with
Retrofit for network callsOkHttp for custom HTTP clientGlide or Coil for mixed usage in large projects
- Can be integrated with custom image loaders or caches.
Alternatives
Glide
More feature-rich, better GIF support, and actively maintained.
Coil
Kotlin-first, coroutine-based, and optimized for modern Android development.