获取系统中软件的信息

 /**     * 得到手机中所有的应用程序信息     *     * @return     */    public List<AppInfo> getAppInfos() {        PackageManager pm = this.getPackageManager(); // 获得PackageManager对象        //创建要返回的集合对象        List<AppInfo> appInfos = new ArrayList<AppInfo>();        //获取手机中所有安装的应用集合        List<ApplicationInfo> applicationInfos = pm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);        //遍历所有的应用集合        for (ApplicationInfo info : applicationInfos) {            AppInfo appInfo = new AppInfo();            //获取应用程序的图标            Drawable app_icon = info.loadIcon(pm);            appInfo.setApp_icon(app_icon);            //获取应用的名称            String app_name = info.loadLabel(pm).toString();            appInfo.setApp_name(app_name);            //获取应用的包名            String packageName = info.packageName;            appInfo.setPackagename(packageName);            try {                //获取应用的版本号                PackageInfo packageInfo = pm.getPackageInfo(packageName, 0);                String app_version = packageInfo.versionName;                appInfo.setApp_version(app_version);            } catch (PackageManager.NameNotFoundException e) {                e.printStackTrace();            }            //判断应用程序是否是用户程序            boolean isUserApp = filterApp(info);            appInfo.setUserApp(isUserApp);            appInfos.add(appInfo);        }        return appInfos;    }    //判断应用程序是否是用户程序    public boolean filterApp(ApplicationInfo info) {        //原来是系统应用，用户手动升级        if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {            return true;            //用户自己安装的应用程序        } else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {            return true;        }        return false;    }

<uses-permission android:name="android.permission.READ_PHONE_STATE" />