android 获取 assets 下的文件

    public static String getJson(String fileName, Context context) {        //将json数据变成字符串        StringBuilder stringBuilder = new StringBuilder();        try {            //获取assets资源管理器            AssetManager assetManager = context.getAssets();            //通过管理器打开文件并读取            BufferedReader bf = new BufferedReader(new InputStreamReader(                    assetManager.open(fileName)));            String line;            while ((line = bf.readLine()) != null) {                stringBuilder.append(line);            }        } catch (IOException e) {            e.printStackTrace();        }        return stringBuilder.toString();    }