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);}

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