如何从android

Question

请问我正在尝试从JSON数组中获取URL thumbnail_images，它位于另一个media_large数组中，如何从第二个数组中获取数据。我已经能够从这个JSON获取URL

"attachments": [

{
    "id": 367,
    "url": "http://street2view.com/wp-content/uploads/2017/01/mmm.png",

使用此代码：

JSONArray attachments = post.getJSONArray("attachments");
if (null != attachments && attachments.length() > 0) {
   JSONObject attachment = attachments.getJSONObject(0);
   if (attachment != null)
      item.setAttachmentUrl(attachment.getString("url"));
}

那么如何从内部数组中获取数据，就像在此代码中一样，我如何获取URL

"thumbnail_images": {
    "medium_large": {
        "url": "http://street2view.com/wp-content/uploads/2017/01/mmm.png",
        "width": 749,
        "height": 400

Answer 1

这是基于你没有＆＃34; thumbnail_images＆＃34;作为一个数组，但它只是一个属性

JSONObject images = post.getJSONObject("thumbnail_images");
JSONObject mediumLarge = images.getJSONObject("medium_large");
String url = mediumLarge.optString("url");

Answer 2

我知道了！

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感谢@classicalConditioning提示。