Changes

Although the Instant Run feature has improved significantly since being introduced it can still occasionally produce unexpected results when performing hot or warm swaps. It is worth being aware, therefore, that clicking the run button when an app is currently running will force a cold swap to be performed regardless of the changes made to the project.

Instant Run is a feature of Android Studio designed to significantly accelerate the code, build and run cycle. Using a swapping mechanism, Instant Run is able to push updates to the running application, in many cases without the need to re-install or even restart the app. Instant Run provides a number of different levels of support depending on the nature of the modification being applied to the project. These levels are referred to as hot, warm and cold swapping. This chapter has introduced the concepts of Instant Run and worked through some demonstrations of the different levels of swapping.