安卓判断手机是否安装了微博

public static boolean isWeiboInstalled(@NonNull Context context) {        PackageManager pm;        if ((pm = context.getApplicationContext().getPackageManager()) == null) {            return false;        }        List<PackageInfo> packages = pm.getInstalledPackages(0);        for (PackageInfo info : packages) {            String name = info.packageName.toLowerCase(Locale.ENGLISH);            if ("com.sina.weibo".equals(name)) {                return true;            }        }        return false;    }