sun.phaisarn.com

Eclipse Version: Indigo Service Release 2
android-sdk_r18-linux
Ubuntu 12.04

Problem
import android.support.v4.app.Fragment;

there is no file android-support-v4.jar

Solution
right-click on the project > Android Tools > Add Support Library...
Ref: http://code.google.com/p/android/issues/detail?id=21488