Java 在android中读取Json数组
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Reading a Json Array in android
提问by nala4ever
I'm trying to read a JSON array. Here is my code.
我正在尝试读取 JSON 数组。这是我的代码。
JSONArray jArray = new JSONArray(jsonString);
System.out.println("*****JARRAY*****"+jArray.length());
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag","_id"+json_data.getInt("account")+
", mall_name"+json_data.getString("name")+
", location"+json_data.getString("number")+
", telephone"+json_data.getString("url")+
",----"+json_data.getString("balance")+
",----"+json_data.getString("credit")+
",----"+json_data.getString("displayName")
);
}
And my sample JSON files syntax is as follows,
我的示例 JSON 文件语法如下，
{
"list": [
{
"account": 1,
"name": "card",
"number": "xxxxx xxxx xxxx 2002",
"url": "http://www.google.com",
"balance": 1.0,
"credit": 1.0,
"displayName": "hsbc bank"
},
{
"account": 2,
"name": "card2",
"number": "xxxxx xxxx xxxx 3003",
"url": "http://www.google.com",
"balance": 2.0,
"credit": 2.0,
"displayName": "nsb bank"
}
],
"count": 2
}
It has a curly brace in front. When i try to execute this code block it gives an error saying
它前面有一个花括号。当我尝试执行此代码块时，它给出了一个错误提示
A JSONArray text must start with '[' at character 1 of....
JSONArray 文本必须以 '[' 开头的字符 1 of....
Has anyone encountered a problem like this? Any help would be greatly appreciated. Please show me a sample code block if can. Thanks in advance.
有没有人遇到过这样的问题？任何帮助将不胜感激。如果可以，请给我看一个示例代码块。提前致谢。
采纳答案by Buhake Sindi
A JSON Object starts with a {and ends with a }while a JSON Array starts with a [and ends with a ].
JSON 对象以 a 开头并以 a{结尾，}而 JSON 数组以 a 开头并以 a[结尾]。
In your case, change your code to have a JSONObjectinstead.
在您的情况下，请更改您的代码以JSONObject改为使用。
JSONObject json = new JSONObject(jsonString);
JSONArray jArray = json.getJSONArray("list");
System.out.println("*****JARRAY*****" + jArray.length());
for(int i=0; i<jArray.length(); i++){
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag", "_id" + json_data.getInt("account") +
", mall_name" + json_data.getString("name") +
", location" + json_data.getString("number") +
", telephone" + json_data.getString("url") +
",----" + json_data.getString("balance") +
",----" + json_data.getString("credit") +
",----" + json_data.getString("displayName")
);
}
回答by Matt Colliss
You first need to create a JSONObject to get the Array from, something like this should work:
您首先需要创建一个 JSONObject 来从中获取数组，这样的事情应该可以工作：
JSONObject jsonObject = new JSONObject(jsonString);
JSONArray jArray = jsonObject.getJSONArray("list");
回答by ??????? ????????
String result = js.getString("Result");
String result = js.getString("Result");
JSONArray js2 = new JSONArray(result);
for (int i = 0; i < js2.length(); i++) {
JSONObject js3 = js2.getJSONObject(i);
categoriescity.add(js3.getString("Title"));
}
