Java tutorial
//package com.java2s; import android.app.ActivityManager; import android.content.ComponentName; import android.content.Context; public class Main { public static String getTopPackage(Context context) { ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); String ret = ""; try { ComponentName cn = am.getRunningTasks(1).get(0).topActivity; ret = cn.getPackageName(); } catch (Exception e) { } return ret; } }