Android 如何解析 Json 错误对象

Question

我想解析我的 json 错误对象

这是 json :

{"errors":["The name must be at least 4 characters.","The username must be at least 3 characters.","The password must be at least 6 characters."]}

这是代码：

JSONObject jObject = new JSONObject(result);

if (jObject.has("errors")){
// PARSE RESULT 
String errors = jObject.getString("errors");

Utils.makeAlertDialog(getActivity(), "Ops!", errors, false);

问题是字符串是这样显示的：

["The name must be at least 4 characters.","The username must be at least 3 characters.","The password must be at least 6 characters."]

我想删除 [] 和 ""。有人可以建议吗？谢谢

成为：

-The name must be at least 4 characters.
-The username must be at least 3 characters. 
-The password must be at least 6 characters.

Answer 1

In post JSON 字符串 errors 是 JSONArray 而不是 String 所以你应该首先从 JSONObject 得到 errors 然后遍历获取字符串的数组：

JSONArray arrArrors = jObject.getJSONArray("errors");
//iterate to arrArrors get all values
for(int i=0;i<arrArrors.length;i++) {
  String error = arrArrors.optString(i);
  Log.i("JSONDATA","error :: "+error);
}

Answer 2

错误是 JSONArray:

JSONArray errors = jObject.optJSONArray("errors");
for (int i = 0; i < errors.length(); i++) {
    String errorAtIndex = errors.optString(i);
}

来自文档：optString(index)

Returns the value at index if it exists, coercing it if necessary.

Android 如何解析 Json 错误对象

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