Download from http://developer.android.com/sdk/index.html

• ADT Bundle

or

• SDK Tools, e.g. http://dl.google.com/android/installer_r22.6.2-windows.exe

For the later choice you need also

• Install into existing Eclipse, from https://dl-ssl.google.com/android/eclipse/ , see http://developer.android.com/sdk/installing/installing-adt.html that also links to zip archive like http://dl.google.com/android/ADT-22.6.2.zip

Alex Ruiz's (from Android team) Blog about Android, Gradle & ADT

• http://stackoverflow.com/questions/22988475/cant-run-imported-gradle-android-project-in-eclipse
• http://stackoverflow.com/questions/17470831/how-to-use-gradle-to-generate-eclipse-and-intellij-project-files-for-android-pro
• http://stackoverflow.com/questions/19907397/exporting-an-eclipse-project-as-gradle
• http://stackoverflow.com/questions/17709972/using-gradle-in-android-development
• http://stackoverflow.com/questions/17340455/adt-eclipse-gradle-incomplete-buildconfig-java
• http://stackoverflow.com/questions/22744839/how-do-i-convert-a-gradle-project-to-android-project
• http://stackoverflow.com/questions/22826748/how-do-i-open-a-gradle-project-in-eclipse
• http://stackoverflow.com/questions/16709305/add-dependencies-via-gradle-to-eclipse-in-android-project

##GitHub

• https://github.com/evant/gradle-retrolambda/issues/19 Android with lambda on Eclipse