从assets读取json文件

public static String getJson(String fileName, Context context) {
    StringBuilder stringBuilder = new StringBuilder();
    try {
        AssetManager assets = context.getAssets();
        BufferedReader bf = new BufferedReader(new InputStreamReader(
                assets.open(fileName)));
        String line;
        while ((line = bf.readLine()) != null) {
            stringBuilder.append(line);
        }
        return stringBuilder.toString();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return "";
}

String json = JsonUtil.getJson("contacts.json", this);