Android中根据Activity的Category搜索匹配的Activity集合，并对此集合排序

Android中根据Activity的Category搜索匹配的Activity集合，并对此集合排序

protected List> getData(String prefix) {
        List> myData = new ArrayList>();

        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory("com.actionbarsherlock.sample.demos.EXAMPLE");

        PackageManager pm = getPackageManager();
        List list = pm.queryIntentActivities(mainIntent, 0);

        if (null == list)
            return myData;

        String[] prefixPath;
        String prefixWithSlash = prefix;

        if (prefix.equals("")) {
            prefixPath = null;
        } else {
            prefixPath = prefix.split("/");
            prefixWithSlash = prefix + "/";
        }

        int len = list.size();

        Map entries = new HashMap();

        for (int i = 0; i < len; i++) {
            ResolveInfo info = list.get(i);
            CharSequence labelSeq = info.loadLabel(pm);
            String label = labelSeq != null
                    ? labelSeq.toString()
                    : info.activityInfo.name;

            if (prefixWithSlash.length() == 0 || label.startsWith(prefixWithSlash)) {

                String[] labelPath = label.split("/");

                String nextLabel = prefixPath == null ? labelPath[0] : labelPath[prefixPath.length];

                if ((prefixPath != null ? prefixPath.length : 0) == labelPath.length - 1) {
                    addItem(myData, nextLabel, activityIntent(
                            info.activityInfo.applicationInfo.packageName,
                            info.activityInfo.name));
                } else {
                    if (entries.get(nextLabel) == null) {
                        addItem(myData, nextLabel, browseIntent(prefix.equals("") ? nextLabel : prefix + "/" + nextLabel));
                        entries.put(nextLabel, true);
                    }
                }
            }
        }

        Collections.sort(myData, sDisplayNameComparator);

        return myData;
    }

    private final static Comparator> sDisplayNameComparator =
        new Comparator>() {
        private final Collator   collator = Collator.getInstance();

        public int compare(Map map1, Map map2) {
            return collator.compare(map1.get("title"), map2.get("title"));
        }
    };

protected Intent activityIntent(String pkg, String componentName) {
		Intent result = new Intent();
		result.setClassName(pkg, componentName);
		return result;
	}

	protected Intent browseIntent(String path) {
		Intent result = new Intent();
		result.setClass(this, ApiDemos.class);
		result.putExtra(EXTRA_PROGRAM, path);
		return result;
	}
 protected void addItem(List> data, String name, Intent intent) {
		Map temp = new HashMap();
		temp.put("title", name);
		temp.put("intent", intent);
		data.add(temp);
	}