// This field is initialized lazily in getSearchables(), and then never modified.
    private Searchables mSearchables;

    private synchronized Searchables getSearchables() {
        if (mSearchables == null) {
            Log.i(TAG, "Building list of searchable activities");
            new MyPackageMonitor().register(mContext, true);
            mSearchables = new Searchables(mContext);
            mSearchables.buildSearchableList();
        }
        return mSearchables;
    }

    class MyPackageMonitor extends PackageMonitor {
        @Override
        public void onSomePackagesChanged() {
            // Update list of searchable activities
            getSearchables().buildSearchableList();
            // Inform all listeners that the list of searchables has been updated.
            Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
            intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
            mContext.sendBroadcast(intent);
        }
    }

    private HashMap<ComponentName, SearchableInfo> mSearchablesMap = null;
    private ArrayList<SearchableInfo> mSearchablesList = null;
    private ArrayList<SearchableInfo> mSearchablesInGlobalSearchList = null;
    private ComponentName mGlobalSearchActivity = null;
    private ComponentName mWebSearchActivity = null;

       final PackageManager pm = mContext.getPackageManager();

        // Use intent resolver to generate list of ACTION_SEARCH & ACTION_WEB_SEARCH receivers.
        List<ResolveInfo> searchList;
        final Intent intent = new Intent(Intent.ACTION_SEARCH);
        searchList = pm.queryIntentActivities(intent, PackageManager.GET_META_DATA);

        List<ResolveInfo> webSearchInfoList;
        final Intent webSearchIntent = new Intent(Intent.ACTION_WEB_SEARCH);
        webSearchInfoList = pm.queryIntentActivities(webSearchIntent, PackageManager.GET_META_DATA);

        if (searchList != null || webSearchInfoList != null) {
            int search_count = (searchList == null ? 0 : searchList.size());
            int web_search_count = (webSearchInfoList == null ? 0 : webSearchInfoList.size());
            int count = search_count + web_search_count;
            for (int ii = 0; ii < count; ii++) {
                // for each component, try to find metadata
                ResolveInfo info = (ii < search_count)
                        ? searchList.get(ii)
                        : webSearchInfoList.get(ii - search_count);
                ActivityInfo ai = info.activityInfo;
                // Check first to avoid duplicate entries.
                if (newSearchablesMap.get(new ComponentName(ai.packageName, ai.name)) == null) {
                    SearchableInfo searchable = SearchableInfo.getActivityMetaData(mContext, ai);
                    if (searchable != null) {
                        newSearchablesList.add(searchable);
                        newSearchablesMap.put(searchable.getSearchActivity(), searchable);
                        if (searchable.shouldIncludeInGlobalSearch()) {
                            newSearchablesInGlobalSearchList.add(searchable);
                        }
                    }
                }
            }
        }

    public void startSearch(String initialQuery, 
                            boolean selectInitialQuery,
                            ComponentName launchActivity,
                            Bundle appSearchData,
                            boolean globalSearch) {
        if (globalSearch) {
            startGlobalSearch(initialQuery, selectInitialQuery, appSearchData);
            return;
        }

        ensureSearchDialog();

        mSearchDialog.show(initialQuery, selectInitialQuery, launchActivity, appSearchData);
    }

    /* package */ void startGlobalSearch(String initialQuery, boolean selectInitialQuery,
            Bundle appSearchData) {
        ComponentName globalSearchActivity = getGlobalSearchActivity();
        if (globalSearchActivity == null) {
            Log.w(TAG, "No global search activity found.");
            return;
        }
        Intent intent = new Intent(INTENT_ACTION_GLOBAL_SEARCH);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.setComponent(globalSearchActivity);
        // Make sure that we have a Bundle to put source in
        if (appSearchData == null) {
            appSearchData = new Bundle();
        } else {
            appSearchData = new Bundle(appSearchData);
        }
        // Set source to package name of app that starts global search, if not set already.
        if (!appSearchData.containsKey("source")) {
            appSearchData.putString("source", mContext.getPackageName());
        }
        intent.putExtra(APP_DATA, appSearchData);
        if (!TextUtils.isEmpty(initialQuery)) {
            intent.putExtra(QUERY, initialQuery);
        }
        if (selectInitialQuery) {
            intent.putExtra(EXTRA_SELECT_QUERY, selectInitialQuery);
        }
        try {
            if (DBG) Log.d(TAG, "Starting global search: " + intent.toUri(0));
            mContext.startActivity(intent);
        } catch (ActivityNotFoundException ex) {
            Log.e(TAG, "Global search activity not found: " + globalSearchActivity);
        }
    }