Image Loading

Dependencies #

Loading an image from the Internet may sound like a trivial task, but it is not. There are a lot of cases which we would have to handle, some of them:

• storing and retrieving the image from the RAM cache
• storing and retrieving the image from the disk cache
• scaling and resizing the image
• displaying loading and error states
• handling out of memory scenarios
• handling concurrent image loading
• etc.

To avoid handling all the scenarios described above, there are several popular image loader libraries developed and distributed as open source. The most popular are:

• Glide
• Fresco
• Picasso

In this lesson, we are going to use the Glide image loader. Let’s add the new library dependencies to the app/build.gradle file in the dependencies section.