判斷是否安裝微網誌

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;
    }