How to set/update the Build Tools version in your Android gradle project

The Build Tools version of your project is (by default) specified in a build.gradle file, most likely in the app sub directory.

Open the file and change/specify the Build Tools version you want to use by adding/changing a buildToolsVersion property to the android section:

android {
    buildToolsVersion "24.0.3"
    ...
}

Example: https://github.com/bitrise-samples/sample-apps-android-sdk22/blob/master/app/build.gradle#L5