我有一个用于注册学生的web api，在我发布学生后它返回了他的id，我想将这个id从json解析为字符串并存储在变量中供以后使用，响应以这种形式表示1234，表示用户id没有“ “这是我的代码
try {
RequestQueue requestQueue = Volley.newRequestQueue(Register.this);
String URL = "http://192.168.0.148/WebApplication7/api/users";
JSONObject jsonBody = new JSONObject();
jsonBody.put("tblRegisteredUsers_UserName", userName.getText().toString().trim());
jsonBody.put("tblRegisteredUsers_FirstName", firstName.getText().toString());
jsonBody.put("tblRegisteredUsers_SecondName", secondName.getText().toString());
jsonBody.put("tblRegisteredUsers_LastName", familyName.getText().toString());
jsonBody.put("tblRegisteredUsers_Country", nationality.toString());
jsonBody.put("tblRegisteredUsers_MobileNumber", mobileNo.getText().toString());
jsonBody.put("tblRegisteredUsers_Email", email.getText().toString());
jsonBody.put("tblRegisteredUsers_Nationality", nationality.toString());
jsonBody.put("tblRegisteredUsers_Active", "false");
jsonBody.put("tblRegisteredUsers_PayType", saved_payment_type.toString());
jsonBody.put("tblRegisteredUsers_DraftInfo", saved_payment_type.toString());
jsonBody.put("tblRegisteredUsers_AccountStates", "pending");
jsonBody.put("tblRegisteredUsers_Password", encrypt(password.getText().toString()));
jsonBody.put("tblRegisteredUsers_registrationDate", DateFormat.getDateTimeInstance().format(new Date()).toString());
jsonBody.put("tblRegisteredUsers_nickName", userName.getText().toString().trim());
jsonBody.put("tblRegisteredUsers_Activeby_FKID", "-1");
jsonBody.put("tblRegisteredUsers_Year", "1");
jsonBody.put("tblRegisteredUsers_ActivebyPayment", "false");
jsonBody.put("tblRegisteredUsers_intensified", contract_Type.toString());
final String requestBody = jsonBody.toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if (response.equals("success")) {
//login authenticated. Start the next activity of your app
Toast.makeText(getApplicationContext(), response.toString(), Toast.LENGTH_LONG).show();
// Toast.makeText(getApplicationContext(), "registered successfully ", Toast.LENGTH_SHORT).show();
} else {
//login failed. prompt to re-enter the credentials
Toast.makeText(Register.this, "Failed to log In", Toast.LENGTH_SHORT).show();
// Log.i("VOLLEY", response);
Toast.makeText(getApplicationContext(), response.toString(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY", error.toString());
}
}) {
@Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
@Override
public byte[] getBody() throws AuthFailureError {
try {
return requestBody == null ? null : requestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", requestBody, "utf-8");
return null;
}
}
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
try {
/**
First you will have to convert the NetworkResponse into a jsonstring.
Then that json string can be converted into the required java object
using gson
**/
addEncodeing2Request(response);
return
super.parseNetworkResponse(response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return Response.error(new ParseError(e));
}
}
};
requestQueue.add(stringRequest);
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(), "الرجاء قيول لائحة النظم", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "password does not match", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext(), "password is not strong", Toast.LENGTH_SHORT).show();
}
}
});
}
顺便说一句，解析网络方法中的return语句有一个编译错误，这里是响应
{
"tblRegisteredUsers_UserPKID": 3034,
"tblRegisteredUsers_UserName": "hi21323",
"tblRegisteredUsers_Password": null,
"tblRegisteredUsers_FirstName": null,
"tblRegisteredUsers_SecondName": null,
"tblRegisteredUsers_LastName": null,
"tblRegisteredUsers_Country": null,
"tblRegisteredUsers_City": null,
"tblRegisteredUsers_Gender": null,
"tblRegisteredUsers_BirthDate": null,
"tblRegisteredUsers_Education": null,
"tblRegisteredUsers_Job": null,
"tblRegisteredUsers_HomePhone": null,
"tblRegisteredUsers_MobileNumber": null,
"tblRegisteredUsers_FaxNumber": null,
"tblRegisteredUsers_Email": null,
"tblRegisteredUsers_HowYouKnowUS": null,
"tblRegisteredUsers_Nationality": null,
"tblRegisteredUsers_Active": null,
"tblRegisteredUsers_PayType": null,
"tblRegisteredUsers_photo": null,
"tblRegisteredUsers_DraftInfo": null,
"tblRegisteredUsers_AccountStates": null,
"tblRegisteredUsers_registrationDate": null,
"tblRegisteredUsers_nickName": null,
"tblRegisteredUsers_Activeby_FKID": null,
"tblRegisteredUsers_ActivationDate": null,
"tblRegisteredUsers_Year": null,
"tblRegisteredUsers_ActivebyPayment": null,
"tblRegisteredUsers_intensified": null,
"tblRegisteredUsers_Shiping_Address": null,
"tblRegisteredUsers_intensified_Status": null,
"tblRegisteredUsers_ReactivationDateTime": null,
"tblRegisteredUsers_ActivebyPayment_Intensive": null,
"tblRegisteredUsers_ActivationDate_IntensiveChange": null,
"tblRegisteredUsers_Installment": null,
"tblRegisteredUsers_InstallmentActivationDate": null,
"tblRegisteredUsers_Installment_ActivePayment": null,
"tblRegisteredUsers_Hide": null,
"tblRegisteredUsers_Hide_User_FK_ID": null,
"tblRegisteredUsers_Hide_DateTime": null,
"tblRegisteredUsers_Renew_Datetime": null
}
任何帮助，将不胜感激
如果你有一个特定的Json对象/结构，你可能想在某处实现MyStructureObject.class并将所有这些变量添加到它。
MyStructureObject{
String id;
public String getIdField(){
return id;
}
... // add all other variables of your json structure
}
您可以使用com.google.code.gson（from maven gradle repository）等JSON库，并从JsonString中序列化（或反序列化）JsonObject。
MySturctureObject instance = new Gson().fromJson(yourJsonString,MyStructureObject.class);
String id = instance.getIdField();
我希望这有点帮助:)我已经成功地在我自己的android java / libgdx应用程序中添加了gson库，但是也许你想要使用另一个库。这只是一个建议。