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android - 用凌空获取数组内的对象

问题描述

我正在尝试检索 json 数组中的对象id，例如.brandcreditcard

{
"result_count": "2",
"total_no_of_rows": "2",
"status": {
    "status_code": "-1",
    "status_text": "Success"
},
"cards": [
    {
        "creditCard": {
            "id": "CRC-9C7I2BGN8RJY",
            "brand": "AMEX",
            "first6": "376449",
            "last4": "3005",
            "store": true
        },
        "method": "CREDIT_CARD"
    },
    {
        "creditCard": {
            "id": "CRC-FXDA9E2YCWWQ",
            "brand": "ELO",
            "first6": "636297",
            "last4": "7013",
            "store": true
        },
        "method": "CREDIT_CARD"
    }
  ]
}

我没有成功使用下面的请求，因为它返回没有值的卡。

JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET,
            url, null, response -> {
                arrayData.clear();
                try {
                    JSONArray cards = response.getJSONArray("cards");
                    for (int i = 0; i < cards.length(); i++) {
                        JSONObject token = cards.getJSONObject(i);
                        CardList card = new CardList(
                                token.getString("id"),
                                token.getString("brand"),
                                token.getString("first6"),
                                token.getString("last4"),
                                token.getBoolean("store"));

                        arrayData.add(card);
                    }
                    Log.v("arrayData", String.valueOf(arrayData));
                } catch (JSONException e) {
                    Log.v("arrayDataError", String.valueOf(e));
                    e.printStackTrace();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.v("arrayDataError", String.valueOf(error));
        }
    });

有人可以帮忙吗？谢谢。

标签： androidjsonandroid-volley

解决方案

为有需要的人提供解决方案：

JSONArray cards = response.getJSONArray("cards");
            for (int i = 0; i < cards.length(); i++) {
                JSONObject token = cards.getJSONObject(i);
                JSONObject creditCard = token.getJSONObject("creditCard");
                card_method = token.getString("method").equals("CREDIT_CARD") ?
                        getString(R.string.creditcard) : getString(R.string.debitcard);
                CardList card = new CardList(
                        creditCard.getString("id"),
                        creditCard.getString("brand"),
                        creditCard.getString("first6"),
                        creditCard.getString("last4"),
                        creditCard.getBoolean("store"));
                arrayData.add(card);
            }

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