Android JSON解析引发意外异常 资料来源：

如有任何建议，我们将不胜感激

价值观： 日志：

1-21 21:15:40.775 23532-23532/com.example.examplemobile W/System.err:org.json.JSONException:java.lang.String类型的值Johnny无法转换为JSONArray
11-21 21:15:40.775 23532-23532/com.example.examplemobile W/System.err:at org.json.json.typemissmatch（json.java:111）
11-21:15:40.785 23532-23532/com.example.examplemobile W/System.err:at org.json.JSONArray.（JSONArray.java:96）
11-21:15:40.785 23532-23532/com.example.examplemobile W/System.err:at org.json.JSONArray.（JSONArray.java:108）

我认为您需要将字符串JSON

intent.getStringExtra（“chatData”）

转换为JSON数组

也许这个链接能帮上忙

---

我认为您需要将字符串JSON

intent.getStringExtra（“chatData”）

转换为JSON数组

也许这个链接能帮上忙

---

您试图将

字符串

解析为

JSONArray

，这就是它抛出异常的原因。为了将其解析为JSONArray，必须有如下数据：

{“message”：[“String1”、“String2”、“String3”]}

---

将

messagesArr

变量更改为字符串，然后通过调用

messagesArr=item.getString（“message”）访问“message”字符串

您试图将

字符串

解析为

JSONArray

，这就是它抛出异常的原因。为了将其解析为JSONArray，必须有如下数据：

{“message”：[“String1”、“String2”、“String3”]}

---

将

messagesArr

变量更改为字符串，然后通过调用

messagesArr=item.getString（“message”）访问“message”字符串
从您在评论中提供的json字符串中，它不是有效的json字符串

[{"type":"agent","message":"User has joined the chat.","created":"2016-11-21 21:40:31","name":"User"},{"type":"agent","message":"example message,"created":"2016-11-21 21:40:36","name":"User"},{"type":"agent","message":"User has left the chat.","created":null,"name":"User"}]

在
示例消息

尝试将json字符串更改为

[
  {
    "type": "agent",
    "message": "User has joined the chat.",
    "created": "2016-11-21 21:40:31",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "example message",
    "created": "2016-11-2121: 40: 36",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "Userhasleftthechat.",
    "created": null,
    "name": "User"
  }
]

请告诉我您在评论中提供的json字符串的结果，它不是有效的json字符串

[{"type":"agent","message":"User has joined the chat.","created":"2016-11-21 21:40:31","name":"User"},{"type":"agent","message":"example message,"created":"2016-11-21 21:40:36","name":"User"},{"type":"agent","message":"User has left the chat.","created":null,"name":"User"}]

在
示例消息

尝试将json字符串更改为

[
  {
    "type": "agent",
    "message": "User has joined the chat.",
    "created": "2016-11-21 21:40:31",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "example message",
    "created": "2016-11-2121: 40: 36",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "Userhasleftthechat.",
    "created": null,
    "name": "User"
  }
]

让我知道结果
什么异常？您的JSON没有数组，它看起来像JSONObjectNote-当更改为messagesArr=newJSONObject（item.getString（“message”））时；我得到以下错误：org.json.JSONException:java.lang.String类型的值无法转换为JSONObject logging intent.getStringExtra（“chatData”）打印出什么？您确定Intent.putExtra（）正在输入有效的JSON吗？+1@iNan@droidthusiast：您的日志猫说java.lang.String类型的
值Johnny无法转换为JSONArray
，这意味着要么您获取了错误的json数据，要么您将json数据字符串读取为数组。什么异常？您的json没有数组，它看起来像JSONObjectNote-当更改为messagesArr=new JSONObject（item.getString（“message”）时); 我得到以下错误：org.json.JSONException:java.lang.String类型的值无法转换为JSONObject logging intent.getStringExtra（“chatData”）打印出什么？您确定Intent.putExtra（）正在输入有效的JSON吗？+1@iNan@droidthusiast：您的日志猫说java.lang.String类型的
值Johnny无法转换为JSONArray
，这意味着您要么获取了错误的json数据，要么将json数据字符串读取为数组。
[{"type":"agent","message":"User has joined the chat.","created":"2016-11-21 21:40:31","name":"User"},{"type":"agent","message":"example message,"created":"2016-11-21 21:40:36","name":"User"},{"type":"agent","message":"User has left the chat.","created":null,"name":"User"}]

[
  {
    "type": "agent",
    "message": "User has joined the chat.",
    "created": "2016-11-21 21:40:31",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "example message",
    "created": "2016-11-2121: 40: 36",
    "name": "User"
  },
  {
    "type": "agent",
    "message": "Userhasleftthechat.",
    "created": null,
    "name": "User"
  }
]