AlertDialog.Builder was added in API Level 1
1. Declare an AlertDialog.Builder object.
2. After you declare the AlertDialog.Builder object, add this line below to instantiate it.
myAlertDialogBuilder = new AlertDialog.Builder(this);
3. Compile and run!
Next Recommended Article: How to Set a the Message in an AlertDialog.Builder
Resources:
http://developer.android.com/reference/android/app/AlertDialog.Builder.html