PackageManager packmngr = this.getPackageManager();
    Intent ints = new Intent(Intent.ACTION_MAIN, null)
    ints.addCategory(Intent.CATEGORY_LAUNCHER);
    List<ResolveInfo> list = packmngr.queryIntentActivities(ints, PackageManager.PERMISSION_GRANTED);

for(ResolveInfo rlnfo: list)
        {
             //Adjust the code and do tests within here.
            Log.i("ACTIVITY INFO: ", rlnfo.activityInfo.toString());
            Log.i("ACTIVITY NAME: ",rlnfo.resolvePackageName.toString());
        }

new AppsUtil(this).printInstalledAppPackages(AppsUtil.AppType.SYSTEM);

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;

public class AppsUtil
{
    public static final String  TAG = "PackagesInfo";
    private Context             _context;
    private ArrayList<PckgInfo> _PckgInfoList;

    public enum AppType
    {
        ALL {
            @Override
            public String toString() {
              return "ALL";
            }
          },
        USER {
            @Override
            public String toString() {
              return "USER";
            }
          },
        SYSTEM {
            @Override
            public String toString() {
              return "SYSTEM";
            }
          }
    }

    class PckgInfo
    {
        private AppType appType;
        private String  appName     = "";
        private String  packageName = "";
        private String  versionName = "";
        private int     versionCode = 0;

        private void prettyPrint()
        {
            Log.i(TAG, appName + "n  AppType: " + appType.toString() + "n  Package: " + packageName + "n  VersionName: " + versionName + "n  VersionCode: " + versionCode);
        }
    }

    public AppsUtil(Context context)
    {
        super();
        this._context = context;
        this._PckgInfoList = new ArrayList<PckgInfo>();
    }

    public void printInstalledAppPackages(AppType appType)
    {
        retrieveInstalledAppsPackages();
        Log.i(TAG, "");
        for (int i = 0; i < _PckgInfoList.size(); i++)
        {
            if (AppType.ALL == appType)
            {
                _PckgInfoList.get(i).prettyPrint();
            }
            else
            {
                if (_PckgInfoList.get(i).appType == appType)
                    _PckgInfoList.get(i).prettyPrint();
            }
        }
    }

    public ArrayList<PckgInfo> getInstalledAppPackages(AppType appType)
    {
        retrieveInstalledAppsPackages();
        ArrayList<PckgInfo> resultPInfoList = new ArrayList<PckgInfo>();

        if (AppType.ALL == appType)
        {
            return _PckgInfoList;
        }
        else
        {
            for (int i = 0; i < _PckgInfoList.size(); i++)
            {
                if (_PckgInfoList.get(i).appType == appType)
                    resultPInfoList.add(_PckgInfoList.get(i));
            }
            return resultPInfoList;
        }
    }

    private void retrieveInstalledAppsPackages()
    {
        PackageManager pm = _context.getPackageManager();
        List<PackageInfo> packs = pm.getInstalledPackages(0);
        for (PackageInfo pi : packs)
        {
            try
            {
                PckgInfo newInfo = new PckgInfo();
                ApplicationInfo ai = pm.getApplicationInfo(pi.packageName, 0);

                newInfo.appType = getAppType(ai);
                newInfo.appName = pi.applicationInfo.loadLabel(pm).toString();
                newInfo.packageName = pi.packageName;
                newInfo.versionName = pi.versionName;
                newInfo.versionCode = pi.versionCode;
                _PckgInfoList.add(newInfo);
            }
            catch (NameNotFoundException e)
            {
                e.printStackTrace();
            }
        }
    }

    AppType getAppType(ApplicationInfo ai)
    {
        AppType resultType ;
        if (isUserApp(ai))
            resultType = AppType.USER;
        else
            resultType = AppType.SYSTEM;

        return resultType;
    }

    boolean isUserApp(ApplicationInfo ai)
    {
        int mask = ApplicationInfo.FLAG_SYSTEM | ApplicationInfo.FLAG_UPDATED_SYSTEM_APP;
        return (ai.flags & mask) == 0;
    }
}