Apply changes button in android studio is disabled(gray color)

Question

I have set up my project's minSdkVersion as 19 and enabled Instant Run . I have deployed the app in my device running on API 21 But the "Apply Changes" button is grayed out.When I hover over the button it says "No Active 'App' launch" although I am running the app in my device at that time .

android studio version : 2.3

gradle version gradle : 3.3

Answer 1

Steps to enable Apply changes option

Step 1: Enable Instant run from Android Studio -> Preferences -> Build,Execution and Deployment ->Enable Instant Run -> Apply -> Ok.

Step 2: Check your minSdkversion should be 21 greater than that and gradle version.

Step 3: Launch your application and it will enable apply changes icon/ option. :)

Answer 2

Try this:-

File-> Invalidate Caches and restart

may be it will help you..