trying to reinstall the ADT plug-in, but the Android SDK and AVD manager are not displayed.
I have a JavaEE perspective, changed it to Java. Now the AVD manager and SDK manager are displayed.
In Eclipse: Menu Navigation -
Press the blue BIG button
http://developer.android.com/sdk/index.html
Do not set up your Android development environment from within Eclipse itself. This is cumbersome. Download the version of eclipse that Google has already completed for you all the necessary configuration.