问题
I am using ION to GET/POST for REST and also to get Images into ListView but I am unable to use POST method and receive response as a JSON The ION version that I am using is 1.3.7. Tested on emulator and also on real devices 4.1.1, 4.2.2 and 4.4
ION Link on gitHub
This code is called on a button click to post to the server after the validations are successful. This is inside support fragment v4:20 defined in gradle
compile 'com.android.support:support-v4:20.+'
///////////////////
Ion.with(getActivity())
.load(URLStr)
.addQuery("action", "dummyAction")
.addHeader("Content-Type", "application/json")
.setLogging("ION_VERBOSE_LOGGING", Log.VERBOSE)
.setJsonObjectBody(jsonStr)
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {
if (null != e) {
if (null != result) {
Log.d(Constants.LOG_TAG, "JSON Result User basic Info: " + result);
} else {
Log.e(Constants.LOG_TAG, "error in posting User basic Info");
}
} else {
Log.e(Constants.LOG_TAG, "error in posting User basic Info", e);
}
}
});
I am getting NullPointer at result. The request JSON is also valid, and I am using GSON to construct it. The response JSON is valid as I checked it using POSTMAN chrome app.
However, below code works perfectly fine, but it's depricated ION.with(getActivity(), URL) So I dont know, where am I making mistake.
Ion.with(getActivity(), URLStr)
.addQuery("action", "dummyAction")
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {
if (e != null) {
e.printStackTrace();
Toast.makeText(getActivity(), "Error loading user data", Toast.LENGTH_LONG).show();
return;
}
Log.d(Constants.LOG_TAG, "DATA: " + result.toString());
String data = result.get("status").getAsString();
Log.d(Constants.LOG_TAG, "DATA: " + data);
}
});
Below is the verbose output from the first call
08-12 14:18:06.010 27928-27928/com.abc.xyz: D/ION_VERBOSE_LOGGING﹕ (0 ms) http://urlHidden/service.php?action=dummyAction: preparing request
08-12 14:18:06.010 27928-27928/com.abc.xyz: I/ION_VERBOSE_LOGGING﹕ (0 ms) http://urlHidden/service.php?action=dummyAction: Using loader: com.koushikdutta.ion.loader.HttpLoader@42d0e6c8
08-12 14:18:06.025 27928-28187/com.abc.xyz: D/ION_VERBOSE_LOGGING﹕ (0 ms) http://urlHidden/service.php?action=dummyAction: Executing request.
08-12 14:18:06.040 27928-28187/com.abc.xyz: I/ION_VERBOSE_LOGGING﹕ (14 ms) http://urlHidden/service.php?action=dummyAction: Response may be served from conditional cache
08-12 14:18:06.040 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (16 ms) http://urlHidden/service.php?action=dummyAction: Resolving domain and connecting to all available addresses
08-12 14:18:06.195 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (167 ms) http://urlHidden/service.php?action=dummyAction: socket connected
08-12 14:18:06.195 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (169 ms) http://urlHidden/service.php?action=dummyAction:
GET /service.php?post=stepOne HTTP/1.1
Host: 188.226.224.99
User-Agent: Dalvik/1.6.0 (Linux; U; Android 4.4.4; GT-N7000 Build/KTU84P)
Accept-Encoding: gzip, deflate
Connection: keep-alive
Accept: */*
Content-Type: application/json
If-Modified-Since: Tue, 12 Aug 2014 06:42:34 UTC
08-12 14:18:06.200 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (170 ms) http://urlHidden/service.php?action=dummyAction: request completed
08-12 14:18:06.355 27928-27928/com.abc.xyz: D/MatchBot﹕ DATA: {"status":"pending"}
08-12 14:18:06.370 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (347 ms) http://urlHidden/service.php?action=dummyAction: Received headers:
HTTP/1.1 200 OK
Date: Tue, 12 Aug 2014 08:48:08 GMT
Server: Apache/2.2.22 (Ubuntu)
X-Powered-By: PHP/5.3.10-1ubuntu3.11
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 64
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html
08-12 14:18:06.380 27928-28187/com.abc.xyz: D/ION_VERBOSE_LOGGING﹕ (355 ms) http://urlHidden/service.php?action=dummyAction: Caching response
08-12 14:18:06.380 27928-28187/com.abc.xyz: V/ION_VERBOSE_LOGGING﹕ (356 ms) http://urlHidden/service.php?action=dummyAction: Final (post cache response) headers:
HTTP/1.1 200 OK
Date: Tue, 12 Aug 2014 08:48:08 GMT
Server: Apache/2.2.22 (Ubuntu)
X-Powered-By: PHP/5.3.10-1ubuntu3.11
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 64
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html
08-12 14:18:06.380 27928-28187/com.abc.xyz: D/ION_VERBOSE_LOGGING﹕ (356 ms) http://urlHidden/service.php?action=dummyAction: Connection successful
08-12 14:18:06.385 27928-27928/com.abc.xyz: E/MatchBot﹕ error in posting User basic Info
08-12 14:18:06.390 27928-28187/com.abc.xyz: D/ION_VERBOSE_LOGGING﹕ (364 ms) http://urlHidden/service.php?action=dummyAction: Recycling keep-alive socket
////////////////////////////////////////////////////////////////
import com.google.gson.annotations.SerializedName;
import java.io.Serializable;
import java.util.Date;
/**
* Created by riinav on 17/6/14.
*/
public class User implements Serializable {
@SerializedName("facebook_id")
private String userFBId;
@SerializedName("status")
private String registrationStatus;
private transient Date registeredOnDate;
public User() {
}
public User(String userFBId, String registrationStatus) {
this.userFBId = userFBId;
this.registrationStatus = registrationStatus;
}
/*
* getters, setters and overidden equals and hashcode methods
*/
}
///////////////////////////////////////////////////////////////////////////
import com.google.gson.annotations.SerializedName;
/**
* Created by riinav on 27/6/14.
*/
public class UserBasicInfo extends User {//implements Serializable {
@SerializedName("name")
private String userName;
@SerializedName("email")
private String emailId;
@SerializedName("gender")
private String gender;
@SerializedName("bday")
private String dob;
@SerializedName("country")
private String country;
@SerializedName("city")
private String city;
@SerializedName("self_image")
private String profilePicUrl;
@SerializedName("school")
private String school;
@SerializedName("college")
private String college;
@SerializedName("degree")
private String qualification;
@SerializedName("sorientation")
private String sexualPreference;
@SerializedName("prefered_age")
private String preferedAge;
@SerializedName("prefered_city")
private String preferedCity;
public UserBasicInfo() {
super();
}
/*
* getters, setters and overidden equals and hashcode methods
*/
}
/////////////////////////////////////// User Model json posted to server
User: {
"college": "University of Mumbai,",
"bday": "01/01/1980",
"email": "dummyEmail@gmail.com",
"gender": "Male",
"degree": "college degree",
"school": "abc High School,",
"name": "awesome name",
"status": "PROCESS",
"facebook_id": "000000000000000" // test fbId
}
///////////////// Server expected response
onSuccess:
{"status":"success"}
OnError:
{"status":"error MESSAGE”}
回答1:
Pass in the POJO object directly. Ion will automatically serialize it into JSON for you.
回答2:
Use method as argument to load
Ion.with(getActivity())
.load("POST",URLStr)
.addQuery("action", "dummyAction")
.addHeader("Content-Type", "application/json")
.setLogging("ION_VERBOSE_LOGGING", Log.VERBOSE)
.setJsonObjectBody(jsonStr)
.asJsonObject()
.setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {}
});
来源：https://stackoverflow.com/questions/25153340/android-koush-ion-lib-unable-to-post-and-receive-json-response