我正在尝试转换来自服务器的响应，这是一个JSON字符串，我想将该JSONstring转换为java对象。我正在尝试Gson。请有人解释并告诉我如何使用Gson执行此操作。
@Override
public void onClick(View v) {
if (v == mLoginButton) {
LoginUser();
}
if (v==mSignUpBtn){
Intent intent=new Intent(LoginActivity.this,RegistrationActivity.class);
startActivity(intent);
}
}
private void LoginUser() {
// final String username = editTextUsername.getText().toString().trim();
final String password = editTextPassword.getText().toString().trim();
final String email = editTextEmail.getText().toString().trim();
StringRequest postStringRequest = new StringRequest(Request.Method.POST,LOGIN_API,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Toast.makeText(LoginActivity.this, response, Toast.LENGTH_LONG).show();
Log.d(TAG,"Reponse Check :"+response);
// Gson gson = new Gson();
// String jsonInString = "{}";
//LoginActivity staff = gson.fromJson(jsonInString, LoginActivity.class);
//Log.d(TAG,"Reponse Check staff :"+staff);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(LoginActivity.this, error.toString(), Toast.LENGTH_LONG).show();
Log.e(TAG,"Error Response Check :"+error);
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
Log.d(TAG,"For email :"+email);
Log.d(TAG,"For password :"+password);
//try {
Log.d(TAG,"My Credentials email URL Encoder: "+( mEncryption.AESEncode(email)));
Log.d(TAG,"My Credentials email URL DECODED: "+( mEncryption.AESDecode(mEncryption.AESEncode(email))));
params.put("data[User][email]",(mEncryption.AESEncode(email)));
Log.d(TAG,"My Credentials pass URL Encoder: "+( mEncryption.AESEncode(password)));
paa
}
logcat的
03-16 16:36:08.346 2618-3428/com.example.user.myapplication D/Null: For email :abc@gmail.com
03-16 16:36:08.346 2618-3428/com.example.user.myapplication D/Null: For password :12345678
03-16 16:36:08.354 2618-3428/com.example.user.myapplication D/Null: My Credentials email URL Encoder: RyUMRBg7UyeIlFBBtNemZFuG46PJtAIdiZWXnlJ4zNI=
03-16 16:36:08.358 2618-3428/com.example.user.myapplication D/Null: My Credentials email URL DECODED: abc@gmail.com
03-16 16:36:08.360 2618-3428/com.example.user.myapplication D/Null: My Credentials pass URL Encoder: pfrt1fKLkoZhAT6hoMJFiA==
03-16 16:36:08.361 2618-3428/com.example.user.myapplication D/Null: Params :{data[User][password]=pfrt1fKLkoZhAT6hoMJFiA==
, data[User][email]=RyUMRBg7UyeIlFBBtNemZFuG46PJtAIdiZWXnlJ4zNI=
}
03-16 16:36:08.505 2618-2618/com.example.user.myapplication D/Null: Reponse Check :{"code":200,"user":{"User":{"id":"ui1bJkK19jxbaquTboA2oQ==","email":"RyUMRBg7UyeIlFBBtNemZFuG46PJtAIdiZWXnlJ4zNI=","status":"1","verified":"1","created":"2016-03-07 11:41:59","modified":"2016-04-07 15:43:43","token":"6b987332b77d7c69d76bf7be80a85177fb7fa08d"},"Profile":{"id":"1","first_name":"abc","last_name":"fgh","bio":"sfafaf","address":"82, Debinibash Road\r\nDum Dum, P.O. - Motijheel","phone":"+913325505055","profile_pic":"\/img\/356a192b7913b04c54574d18c28d46e6395428ab\/license.jpg","user_id":"1","Contributor":{"id":"31","profile_id":"1","status":"1","vs_cdn_id":"261961777","secret_token":"s-7Va5z","uploaded_on":null,"statement":"AOK KJDHKJDH bkgkg kkhkjh kjhkj kjh kjhkjh","time":"7 hours per month","created":"2016-05-02 18:40:11","modified":"2016-05-02 18:41:29"},"Moderator":[]},"redirect":"\/"}}
答案 0 :(得分：0)
您可以使用通用的方式：
private final static Gson GSON = new GsonBuilder().create();
public static <T> T fromJSON(String json, Class<T> clazz) {
try {
return GSON.fromJson(json, clazz);
} catch (JsonSyntaxException e) {
LOGGER.warn("Could not deserialize object", e);
}
return null;
}
答案 1 :(得分：0)
你不能从json制作活动/片段。
在你的onResponse（）方法中：
<table id="mazzo">
<tr><td id="pick01">"first onclick choice here"</td></tr>
<tr><td id="pick02">"second onclick choice here"</td></tr>
<tr><td id="pick03">"third onclick choice here"</td></tr>
<tr><td id="pick04">"forth first onclick choice here"</td></tr>
</table>
使ModelObject类像这样：
ModelObject obj = new Gson().fromJson(jsonString, ModelObject.class);
之后，您可以使用此对象执行任何操作（将其传递给任何活动或片段）。
答案 2 :(得分：0)
如果正确给出了字段，Gson会将值映射到相应的模型类对象。看看下面的模型类。之后，如果您致电Example data = GSON.fromJson(yourJson, Example.class);，此数据对象将拥有您需要的所有内容。
----------------------------------- com.example.Contributor.java ----- ------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Contributor {
@SerializedName("id")
@Expose
private String id;
@SerializedName("profile_id")
@Expose
private String profileId;
@SerializedName("status")
@Expose
private String status;
@SerializedName("vs_cdn_id")
@Expose
private String vsCdnId;
@SerializedName("secret_token")
@Expose
private String secretToken;
@SerializedName("uploaded_on")
@Expose
private Object uploadedOn;
@SerializedName("statement")
@Expose
private String statement;
@SerializedName("time")
@Expose
private String time;
@SerializedName("created")
@Expose
private String created;
@SerializedName("modified")
@Expose
private String modified;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getProfileId() {
return profileId;
}
public void setProfileId(String profileId) {
this.profileId = profileId;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getVsCdnId() {
return vsCdnId;
}
public void setVsCdnId(String vsCdnId) {
this.vsCdnId = vsCdnId;
}
public String getSecretToken() {
return secretToken;
}
public void setSecretToken(String secretToken) {
this.secretToken = secretToken;
}
public Object getUploadedOn() {
return uploadedOn;
}
public void setUploadedOn(Object uploadedOn) {
this.uploadedOn = uploadedOn;
}
public String getStatement() {
return statement;
}
public void setStatement(String statement) {
this.statement = statement;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getCreated() {
return created;
}
public void setCreated(String created) {
this.created = created;
}
public String getModified() {
return modified;
}
public void setModified(String modified) {
this.modified = modified;
}
}
----------------------------------- com.example.Example.java ----- ------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Example {
@SerializedName("code")
@Expose
private Integer code;
@SerializedName("user")
@Expose
private User user;
public Integer getCode() {
return code;
}
public void setCode(Integer code) {
this.code = code;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
----------------------------------- com.example.Profile.java ----- ------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Profile {
@SerializedName("id")
@Expose
private String id;
@SerializedName("first_name")
@Expose
private String firstName;
@SerializedName("last_name")
@Expose
private String lastName;
@SerializedName("bio")
@Expose
private String bio;
@SerializedName("address")
@Expose
private String address;
@SerializedName("phone")
@Expose
private String phone;
@SerializedName("profile_pic")
@Expose
private String profilePic;
@SerializedName("user_id")
@Expose
private String userId;
@SerializedName("Contributor")
@Expose
private Contributor contributor;
@SerializedName("Moderator")
@Expose
private List<Object> moderator = null;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getBio() {
return bio;
}
public void setBio(String bio) {
this.bio = bio;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getProfilePic() {
return profilePic;
}
public void setProfilePic(String profilePic) {
this.profilePic = profilePic;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public Contributor getContributor() {
return contributor;
}
public void setContributor(Contributor contributor) {
this.contributor = contributor;
}
public List<Object> getModerator() {
return moderator;
}
public void setModerator(List<Object> moderator) {
this.moderator = moderator;
}
}
----------------------------------- com.example.User.java ----- ------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class User {
@SerializedName("User")
@Expose
private User_ user;
@SerializedName("Profile")
@Expose
private Profile profile;
@SerializedName("redirect")
@Expose
private String redirect;
public User_ getUser() {
return user;
}
public void setUser(User_ user) {
this.user = user;
}
public Profile getProfile() {
return profile;
}
public void setProfile(Profile profile) {
this.profile = profile;
}
public String getRedirect() {
return redirect;
}
public void setRedirect(String redirect) {
this.redirect = redirect;
}
}
----------------------------------- com.example.User_.java ----- ------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class User_ {
@SerializedName("id")
@Expose
private String id;
@SerializedName("email")
@Expose
private String email;
@SerializedName("status")
@Expose
private String status;
@SerializedName("verified")
@Expose
private String verified;
@SerializedName("created")
@Expose
private String created;
@SerializedName("modified")
@Expose
private String modified;
@SerializedName("token")
@Expose
private String token;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getVerified() {
return verified;
}
public void setVerified(String verified) {
this.verified = verified;
}
public String getCreated() {
return created;
}
public void setCreated(String created) {
this.created = created;
}
public String getModified() {
return modified;
}
public void setModified(String modified) {
this.modified = modified;
}
public String getToken() {
return token;
}
public void setToken(String token) {
this.token = token;
}
}