Gson / Retrofit分析变量JSON [英] Gson/Retrofit parse variable JSON
问题描述
通常情况下，我会尝试将JSON对象映射到POJO，但是在这种情况下，我不知道该怎么做。
我的JSON看起来像这样：
parts：[
[
text，
http://www.example.com/
]，
[
page，
[
http://www.example.com/，
\\\
\\ \\ t \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' /picture.jpg
]
]，
[
text，
另一个字符串在这里
]
]
运行这段代码通过典型的Json to Java Object转换器不起作用，我试图转换为列表< List< String>>>> myObject; 但正如所料，这给了我一个例外：
W：com.google.gson。 JsonSyntaxException：java.lang.IllegalStateException：期望一个字符串，但是在第1行的BEGIN_ARRAY列9563路径$ [3] ./ object.parts [1] [1]
我想我必须为此创建一个自定义的DeSerializer，但是我不知道从哪里开始。
任何帮助指向我的好方向都将不胜感激。
编辑：正如评论，是提供的JSON数据不是有效的键值对形成。我已经联系了API提供商，他们会解决这个问题。
直到我遇到前端处理这个问题的一种方法，我会继续打开这个问题。
所以在几天后再次看到这个问题后，我终于找到了适用于我的案例的解决方案！
而不是试图将元素解析为 String ，这与我第一次尝试时一样。我现在将数据存储到一个简单的 java.lang.Object
我的模型现在看起来像这样： $ b
@SerializedName（parts）
@Expose
private List< ;列表与LT;对象>> parts = new ArrayList< List< Object>>（）;
这可以防止GSON分析过程在检测到无效数组时崩溃应用程序。
在尝试访问数据时，我现在检查Object是否为 String 类型，如果这种情况继续下去，忽略所有阵列。
在我的代码中，它看起来像这样：
（在我的情况下，我只需要parts数组中第一个元素的text属性）
List< List< Object>> partList = myParsedObject.getParts（）; （partList.size（）> 0）{
if（partList.get（0）.size（）> 1）{
if（partList.get（0））。 get（1）instanceof String）{
return partList.get（0）.get（1）.toString（）;
}
}
}
I'm struggling in parsing a JSON Object with variable content to a Java Object.
Normally, I'd try to map a JSON Object to a POJO, however in this case I don't know what to do.
My JSON looks like this:
"parts": [
[
"text",
"http://www.example.com/"
],
[
"page",
[
"http://www.example.com/",
"\n\t\n\t\t\n\t\t\tSome of the Page Content preview here...",
"",
"/path/to/picture.jpg"
]
],
[
"text",
"Another String here "
]
]
Running this piece of code trough a typical Json to Java Object converter doesn't work because this cannot be mapped to a simple POJO.
I tried converting to List<List<String>>> myObject; but as expected this gives me an exception:
W: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_ARRAY at line 1 column 9563 path $[3]./object.parts[1][1]
I think I'll have to create a custom DeSerializer for this, however I have no idea where to start.
Any help pointing me in the good direction would be greatly appreciated.
EDIT: As pointed out in the comments, is the JSON data supplied not in valid key-value pair formation. I've contacted the API providers and they will sort this out.
Until I come across a way of dealing with this problem on the frontend, I'll keep this question open.
So after looking at this problem again after af few days, I've finally found a solution that works for my case!
In stead of trying to parse the element into a String as in my first attempts. I'm now storing the data to a simple java.lang.Object
My model now looks like this:
@SerializedName("parts")
@Expose
private List<List<Object>> parts = new ArrayList<List<Object>>();
This prevents the GSON parsing process from crashing the app when the invalid array is detected.
When trying to access the data, I now check if the Object is of type String, if this is the case I continue, ignoring all Arrays.
In my code this looks like this: (In my case, I only need the text attribute of the first element in the parts array)
List<List<Object>> partList = myParsedObject.getParts();
if (partList.size() > 0) {
if (partList.get(0).size() > 1) {
if (partList.get(0).get(1) instanceof String) {
return partList.get(0).get(1).toString();
}
}
}
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