Android Studio 3.1 “Run” not compiling code

I have solution for your issue.

Also confirmed by Android Studio on Twitter : https://twitter.com/androidstudio/status/981914632892960768

  1. Edit your app configuration as below.

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  1. Here you can see your app configuration as below.

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  1. Here is missing Gradle-aware make attribute in before launch configuration. You can see here.

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  1. Please add this Gradle-aware Make attribute through this way. Click on + icon and select Gradle-aware Make as seen in this screen.

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  1. You can add this without writing any task just press OK button and task will be added and now it should look like this. Now apply changes and run your application.

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It will solve this old apk installing issue on clean build in new Android Studio 3.1 issue.

Note : This issue is resolved in new Android Studio 3.1.1 Stable release.

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