Hello everyone,
by mistake when it asks me to choose the folder where you have installed SDK I selected the wrong folder, and now I always mistake.
how do I select the right one, because now I always opens this automatically?
thank you very much
From http://docs.unity3d.com/Documentation/Manual/android-sdksetup.html
Add the Android SDK path to Unity
The first time you build a project for Android (or if Unity later fails to locate the SDK) you will be asked to locate the folder where you installed the Android SDK (you should select the root folder of the SDK installation). The location of the Android SDK can also be changed in the editor by selecting Unity > Preferences from the menu and then clicking on External Tools in the preferences window.