Android/java用编号数据解析JSON

Question

我一直在寻找用java/android解析JSON数据的方法。不幸的是，没有与我的JSON相同的JSON。我有包含奇怪数字的JSON数据，看起来如下：

{
"formules": [{"1":
    {
  "formule": "Linear Motion",
  "url": "qp1"
},"2":
{
  "formule": "Constant Acceleration Motion",
  "url": "qp2"
},"3":
{
  "formule": "Projectile Motion",
  "url": "qp3"
}
}
]
}

请帮助我如何在Java/android中解析这一点。谢谢

Answer 1

尝尝这个

JSONObject jsonObject = new JSONObject(string);
JSONArray jsonArray = jsonObject.getJSONArray("formules");
JSONObject jsonObject1 = jsonArray.getJSONObject(0);

现在您可以访问对象"1“作为

JSONObject json = jsonObject1.getJSONObject("1");

或使用迭代器进行如下迭代

Iterator keys = jsonObject1.keys();
while(keys.hasNext()) {
            // loop to get the dynamic key
            String currentDynamicKey = (String)keys.next();
            JSONObject json = jsonObject1.getJSONObject(currentDynamicKey);

        }

如果能用，请告诉我。

Answer 2

对于在Android中解析Json，我发现Gson库很有帮助

http://mvnrepository.com/artifact/com.google.code.gson/gson/2.3

它需要的是创建一个表示对象的pojo类。可能看上去像

public class ClassPojo
{
private Formules[] formules;

public Formules[] getFormules ()
{
    return formules;
}

public void setFormules (Formules[] formules)
{
    this.formules = formules;
}

@Override
public String toString()
{
    return "ClassPojo [formules = "+formules+"]";
}
}
public class Formules
{
private Formule 3;

private Forumle 2;

private Formule 1;



}

public class Formule
{
private String formule;

private String url;

public String getFormule ()
{
    return formule;
}

public void setFormule (String formule)
{
    this.formule = formule;
}

public String getUrl ()
{
    return url;
}

public void setUrl (String url)
{
    this.url = url;
}

@Override
public String toString()
{
    return "ClassPojo [formule = "+formule+", url = "+url+"]";
}
}       

然后，要将它与JSon进行转换，您可以使用

//Convert to JSON
ClassPojo pojo = new ClassPojo();
Gson gson = new Gson();
String json = gson.toJson(pojo);

//COnvert back to Java object
ClassPojo pojo = gson.fromJson(json,ClassPojo.class);