问题
Here is the JSON response from a server (which i cannot change the structure of)
My issues are as follows: 1. The data changes based on the query so sometimes the Primary posts & Secondary Posts are an array and sometimes they are an object/ string.
- How would i go about retrieving a value from Address without getting the whole structure?
Eg.
- only retrieve Email & post code strings from MainAddress
- only retrieve Address1 from Website & Twitter
{
"Members": {
"Member": {
"@First_Id": "000",
"@Second_Id": "000",
"@Third_Id": "000",
"@Fourth_Id": "000",
"DisplayAs": "Title FirstName LastName",
"ListAs": "LastName, Title FirstName",
"FullTitle": "Title Title FirstName LastName Title",
"PreviousName": null,
"DateOfBirth": "2020-01-01T00:00:00",
"DateOfDeath": {
"@xsi:nil": "true",
"@xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance"
},
"Gender": "M OR F",
"Party": {
"@Id": "4",
"#text": "Party Name"
},
"House": "House Name",
"MemberFrom": "Area Name",
"HouseStartDate": "2020-01-01T00:00:00",
"HouseEndDate": {
"@xsi:nil": "true",
"@xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance"
},
"CurrentStatus": {
"@Id": "0",
"@IsActive": "True",
"Name": "Current Member",
"Reason": null,
"StartDate": "2020-01-01T00:00:00"
},
"Addresses": {
"Address": [
{
"@Type_Id": "6",
"Type": "Website",
"IsPreferred": "False",
"IsPhysical": "False",
"Note": null,
"Address1": "https://www.example.co.uk"
},
{
"@Type_Id": "1",
"Type": "MainAddress",
"IsPreferred": "False",
"IsPhysical": "True",
"Note": null,
"Address1": "Line 1",
"Address2": "Line 2",
"Address3": "Line 3",
"Address4": null,
"Address5": "County Name",
"Postcode": "Postcode",
"Phone": "000 0000 000",
"Fax": "000 0000 000",
"Email": "example@email.co.uk",
"OtherAddress": null
},
{
"@Type_Id": "7",
"Type": "Twitter",
"IsPreferred": "False",
"IsPhysical": "False",
"Note": null,
"Address1": "https://twitter.com/twitter_name"
},
{
"@Type_Id": "4",
"Type": "Address2",
"IsPreferred": "False",
"IsPhysical": "True",
"Note": null,
"Address1": "Line1",
"Address2": "Line2",
"Address3": "Line3",
"Address4": "Line4",
"Address5": null,
"Postcode": "Postcode",
"Phone": "0000 000 000",
"Fax": null,
"Email": "example2@email.co.uk",
"OtherAddress": null
}
]
},
"PrimaryPosts": {
"PrimaryPost": [
{
"@Id": "000",
"Name": "Name",
"ProperName": "The Name",
"StartDate": "2020-01-01T00:00:00",
"EndDate": "2020-01-01T00:00:00",
"Note": null,
"EndNote": null,
"IsJoint": "False",
"IsUnpaid": "False",
"Email": null,
"FormerName": "Name"
},
{
"@Id": "000",
"Name": "Name",
"ProperName": "The Name",
"StartDate": "2020-01-01T00:00:00",
"EndDate": "2020-01-01T00:00:00",
"Note": null,
"EndNote": null,
"IsJoint": "False",
"IsUnpaid": "False",
"Email": null,
"FormerName": "Name"
}
]
},
"FormerPosts": {
"FormerPost": [
{
"@Id": "000",
"Name": "Name",
"ProperName": "The Name",
"StartDate": "2020-01-01T00:00:00",
"EndDate": "2020-01-01T00:00:00",
"Note": null,
"EndNote": null,
"IsJoint": "False",
"IsUnpaid": "False",
"Email": null
},
{
"@Id": "000",
"Name": "Name",
"ProperName": "The Name",
"StartDate": "2020-01-01T00:00:00",
"EndDate": "2020-01-01T00:00:00",
"Note": null,
"EndNote": null,
"IsJoint": "False",
"IsUnpaid": "False",
"Email": null
}
]
},
"BiographyEntries": {
"BiographyEntry": [
{
"@Category_Id": "1",
"Category": "Interest 1",
"Entry": "Value1, Value2, Value3, Value4"
},
{
"@Category_Id": "2",
"Category": "Interest 2",
"Entry": "Value1, Value2, Value3, Value4"
}
]
}
}
}
}
My current code for parsing is:
public class Main Activity extends AppcompatActivity {
private DataCallAPI dataCallAPI;
private static final String BASE_URL = "http://example.co.uk/data/";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
dataCallAPI = retrofit.create(DataCallAPI.class);
Call<RootObject> call = dataCallAPI.getMember(postcode);
call.enqueue(new Callback<RootObject>() {
@Override
public void onResponse(Call<RootObject> call, Response<RootObject> response) {
Log.d("JSON Log D", "onResponse: Server Response" + response.toString()+ "\n\n");
RootObject callData= response.body();
ArrayList<Address> addressList =
response.body().getMembers().getMember().getAddresses().getAddress();
for( int i = 0; i < addressList.size(); i++) {
Log.d("JSON Log D", "onResponse: \n" +
addressList.get(i).getType() + " Address: " + addressList.get(i).getAddress1() + "\n" +
addressList.get(i).getType() + " Number: " + addressList.get(i).getPhone() + "\n" +
addressList.get(i).getType() + " Email: " + addressList.get(i).getEmail() + "\n" +
"------------------------------------------------------------------\n\n");
}
}
@Override
public void onFailure(Call<RootObject> call, Throwable t) {
Log.e("JSON Log E", "onFailure: Something went wrong: " + t.getMessage() );
Toast.makeText(MainActivity.this,"Something Went Wrong",Toast.LENGTH_SHORT).show();
}
});
}
I have setup models for all the POJO that I can, but the model for Addresses which contains either ArrayList or Object will fail dependant on the json data being returned.
package com.example.retrofittutorialbuild.Model;
import java.util.ArrayList;
import com.example.retrofittutorialbuild.Model.Address.Address;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Addresses {
@SerializedName("Address")
@Expose
private ArrayList<Address> address = null;
public ArrayList<Address> getAddress() { return address;}
@Override
public String toString() {
return "Addresses{" +
"address=" + address +
'}';
}
}
The current response i am getting is:
2020-01-31 11:18:35.058 27987-27987/com.example.retrofittutorialbuild D/JSON Log D: onResponse:
Website Address: http://www.exampleurl.co.uk
Website Number: null
Website Email: null
------------------------------------------------------------------
2020-01-31 11:18:35.058 27987-27987/com.example.retrofittutorialbuild D/JSON Log D: onResponse:
MainAddress Address: example address
MainAddress Number: 000 0000 000
MainAddress Email: email@example.co.uk
------------------------------------------------------------------
2020-01-31 11:18:35.058 27987-27987/com.example.retrofittutorialbuild D/JSON Log D: onResponse:
Twitter Address: https://twitter.com/example
Twitter Number: null
Twitter Email: null
------------------------------------------------------------------
2020-01-31 11:18:35.058 27987-27987/com.example.retrofittutorialbuild D/JSON Log D: onResponse:
Address2 Address: example address
Address2 Number: 000 0000 000
Address2 Email: email@example.co.uk
---------------------------------------------------------------------
来源：https://stackoverflow.com/questions/60002782/how-to-retrieve-specific-data-from-json-array-via-retrofit2-using-gson-parsing