Here you can find the source of getAppPkg(Context c, int uid)
public static String getAppPkg(Context c, int uid) throws NullPointerException
//package com.java2s; import android.content.Context; import android.content.pm.PackageManager; public class Main { public static String getAppPkg(Context c, int uid) throws NullPointerException { PackageManager pm = c.getPackageManager(); String name = pm.getPackagesForUid(uid)[0]; return name; }//from www.ja va 2s .com }