java类型的值。无法将lang.String转换为JSONObject-Android

Question

我将客户数据对象存储为共享首选项（Android）中的JSON字符串，并尝试检索转换回客户对象的字符串并用于验证。从对象到JSON字符串的转换非常好，并且存储在首选项中（作为键值（字符串）对）。
当我尝试使用SharedP创建JSONObject或数组（它不是数组，但还是尝试了）references.get字符串（键"）-我总是得到相同的错误值...类型java.lang.字符串不能转换为JSONObject。
我希望一双不同的眼睛能捕捉到我不能捕捉到的东西。带有数据的错误消息（屏蔽）：
Value

{"address":{"city":"city","country":"country","customer_address_id":0,"customer_id":0,"house_number":"#123, Lane 1, Street 1","latitude":0.0,"longitude":0.0,"postcode":"12001","street":"Lane 2, Street 2"},"ageGroup":"25-45","dateOfBirth":"1537308474000","email":"[e-mail]","firstName":"abcdefg","gender":"","id":"108","lastName":"xyz","locale":"en_us","middleName":"none","phone":"1234567890","uuid":"8c3ce2c5-600f-3c4e-bc07-727d61fae7ff"}

类型为java。无法将lang.String转换为JSONObject
我要做的就是（代码要点）：
使用以下命令保存到共享pref：

jsonAdapter = moshi.adapter(RegisterUser.class);
mRegisterUser = (RegisterUser) jsonAdapter.fromJson(regisCustUser.toString());
prefs = UserPrefs.getUserPrefs(getApplicationContext());
prefs.setPrefsItem(UserPrefs.getregUserKey(), jsonAdapter.toJson(mRegisterUser));`  

其中setPrefsItem做以下：

JsonAdapter jsonAdapter = moshi.adapter(javaObject.getClass());
String cartJson = jsonAdapter.toJson(javaObject);
// Log.e("CartJsonreflection", cartJson);
editor.putString(prefKey, cartJson);
editor.commit();

以下是检索发生的位置：

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

...
private static SharedPreferences settings; 

...
public static Object someMethod(String prefKey, Object javaObject) {
    String prefJson = settings.getString(prefKey, "");
    JSONObject regisCustomer = new JSONObject(prefJson);
    javaObject = (someObject) jsonAdapter.fromJson(regisCustomer.toString()); 
    // casting is redundant but added for clarity
    return javaObject;
}

其中prefJson具有上述字符串。我尝试在两个网站上验证JSON字符串-https://jsoneditoronline.org/和https://jsonlint.com/我甚至在记事本上粘贴了任何特殊字符的字符串，但没有找到。

Answer 1

解决方案包括来自其他帖子的答案。我必须做：

   prefJson= prefJson.replace("\\\"", "\"");
   prefJson = prefJson.substring(prefJson.indexOf("{"), prefJson.lastIndexOf("}") + 1);

奇怪的是SharedReferences的值中有如下精确的字符串（包括开始和结束引号（““”）。不确定为什么会出现问题，只是作为参数传递。硬编码到字符串变量中时，引号和转义字符被忽略：

"{\"address\":{\"city\":\"City\",\"country\":\"Country\",\"customer_address_id\":0,\"customer_id\":0,\"house_number\":\"#123, Lane 1, Street 1\",\"latitude\":0.0,\"longitude\":0.0,\"postcode\":\"PA 12345\",\"street\":\"Lane 2, Street 2\"},\"ageGroup\":\"25-45\",\"dateOfBirth\":\"1537368909000\",\"email\":\"[e-mail]\",\"firstName\":\"First Name\",\"gender\":\"\",\"id\":\"119\",\"lastName\":\"Last Name\",\"locale\":\"en_us\",\"middleName\":\"none\",\"phone\":\"0987654321\",\"uuid\":\"8c3ce2c5-600f-3c4e-bc07-727d61fae7ff\"}"  

必须转换为：

{"address":{"city":"City","country":"Country","customer_address_id":0,"customer_id":0,"house_number":"#123, Lane 1, Street 1","latitude":0.0,"longitude":0.0,"postcode":"PA 12345","street":"Lane 2, Street 2"},"ageGroup":"25-45","dateOfBirth":"1537368909000","email":"[e-mail]","firstName":"First Name","gender":"","id":"119","lastName":"Last Name","locale":"en_us","middleName":"none","phone":"0987654321","uuid":"8c3ce2c5-600f-3c4e-bc07-727d61fae7ff"}  

注意：版主，如果这听起来重复，请随意删除或合并此问题。谢谢大家。

Answer 2

试试下面

Gson gson = new GsonBuilder().create();
public static <T> T someMethod(String prefKey, Class<T> type) {
   String prefJson = settings.getString(prefKey, "");
   return gson.fromJson(prefJson , type);
}

Answer 3

可能是这样的情况，您试图将默认的字符串转换为JSONObject的空字符串。请确保您在prefJsonby中获得一个值，确保您已经用正确的键初始化了Shared首选项，并且getString（）的键也是正确的。

    var s ="{\"address\":{\"city\":\"city\",\"country\":\"country\",\"customer_address_id\":0,\"customer_id\":0,\"house_number\":\"#123, Lane 1, Street 1\",\"latitude\":0.0,\"longitude\":0.0,\"postcode\":\"12001\",\"street\":\"Lane 2, Street 2\"},\"ageGroup\":\"25-45\",\"dateOfBirth\":\"1537308474000\",\"email\":\"[e-mail]\",\"firstName\":\"abcdefg\",\"gender\":\"\",\"id\":\"108\",\"lastName\":\"xyz\",\"locale\":\"en_us\",\"middleName\":\"none\",\"phone\":\"1234567890\",\"uuid\":\"8c3ce2c5-600f-3c4e-bc07-727d61fae7ff\"}";
    val regisCustomer = JSONObject(s)
    println(regisCustomer.toString())

因为用你的值硬编码字符串是有效的。