我正在尝试获取此JSON数组，但没有得到结果。有人可以告诉我怎么用截击。我需要预订中的所有数据。请帮助我实现它。
{
"code": 200,
"savebooking": [
{
"Booking": {
"id": "304",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7469",
"completion": "2017-06-30",
"approved": null,
"cdn_id": "328301423",
"secret_token": "s-riQMc",
"uploaded_on": "2017-06-16 07:51:35",
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 07:51:35"
}
},
{
"Booking": {
"id": "305",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7470",
"completion": "2017-06-30",
"approved": null,
"cdn_id": "328318377",
"secret_token": "s-naSse",
"uploaded_on": "2017-06-16 10:43:39",
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 10:43:39"
}
},
{
"Booking": {
"id": "306",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7471",
"completion": "2017-06-30",
"approved": null,
"cdn_id": null,
"secret_token": null,
"uploaded_on": null,
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 07:48:31"
}
},
{
"Booking": {
"id": "307",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7472",
"completion": "2017-06-30",
"approved": null,
"cdn_id": null,
"secret_token": null,
"uploaded_on": null,
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 07:48:31"
}
}
]
}
如何使用volley解析此JSON响应？ 我试过这个，但没有得到结果。
StringRequest postStringRequest = new StringRequest(Request.Method.POST, BOOK_API,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Response Check :" + response);
try {
JSONObject json = new JSONObject(response);
JSONObject booking = json.getJSONArray("savebooking").getJSONObject("Booking");
Log.d(TAG, "booking Response Check :" + booking);
} catch (JSONException e) {
e.printStackTrace();
}
}
});
答案 0 :(得分：1)
这是
//Here is main response object
JSONObject json = new JSONObject(response);
//now get your json array like this
JSONArray booking = json.getJSONArray("savebooking");
//现在检查数组长度＆gt; 0
if(booking.length ()> 0){
for(int countItem = 0;countItem<booking.length;countItem++){
JSONObject bookingObject = booking.getJsonObject(countItem);
String id = bookingObject.isNull("id")?"":bookingObject.optString("id");
list.add(id);
}
}
答案 1 :(得分：1)
使用Volley和Gson以POJO（普通旧Java对象）格式获取数据需要执行四个步骤。
准备请求对象：
你正在准备一个不错的StringRequest。但是，由于您要获取JSON对象作为响应，因此应使用JSONObjectRequest，如下所示。
JsonObjectRequest saveBookingsRequest = new JsonObjectRequest(BOOK_API, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray saveBookings = response.getJSONArray("savebooking");
Gson gson = new Gson();
SaveBooking[] bookings = gson.fromJson(books, SaveBooking[].class);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, error.getMessage());
}
});
调用API：
要调用准备好的请求，您需要RequestQueue。而且，您必须将准备好的请求添加到队列中。
RequestQueue queue = Volley.newRequestQueue(this);
// Add the request to the RequestQueue.
queue.add(saveBookingsRequest);
抓住回复：
我们在准备请求时已编写此代码。我们通过覆盖onResponse() Response.Listener方法来捕获响应。在这里，我们从savebooking对象中提取response JSONArray。
@Override
public void onResponse(JSONObject response) {
try {
JSONArray saveBookings = response.getJSONArray("savebooking");
Gson gson = new Gson();
SaveBooking[] bookings = gson.fromJson(books, SaveBooking[].class);
} catch (JSONException e) {
e.printStackTrace();
}
}
解析响应：
最后，您需要从JSON解析为POJO。用于JSON解析的最佳库是Gson。为此，您需要创建一个Booking类和一个包装器SaveBooking类。
Booking：
public class Booking {
@SerializedName("id")
public int mId;
@SerializedName("contributor_id")
public int mContributorId;
@SerializedName("table_of_content_id")
public int mTableOfContentId;
@SerializedName("composition_id")
public int mCompositionId;
@SerializedName("completion")
public String completion;
@SerializedName("approved")
public Object mApproved;
@SerializedName("cdn_id")
public int mCdnId;
@SerializedName("secret_token")
public String mSecretToken;
@SerializedName("uploaded_on")
public String mUploadedOn;
@SerializedName("created")
public String mCreated;
@SerializedName("modified")
public String mModified;
}
SaveBooking：
public class SaveBooking {
@SerializedName("Booking")
public Booking booking;
}
然后在onResponse()中，您需要将JSON字符串解析为Booking个对象数组：
Gson gson = new Gson();
SaveBooking[] bookings = gson.fromJson(books, SaveBooking[].class);
<强>假设/限制：
Booking.approved的类型为Object，因为所有已批准的值都为null。Date或DateTime字段都存储为String。Booking类，那么您应该更改响应以从JSON响应中删除SaveBooking包装。在这种情况下，您的savebooking将如下所示：
{
"savebooking": [
{
"id": "304",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7469",
"completion": "2017-06-30",
"approved": null,
"cdn_id": "328301423",
"secret_token": "s-riQMc",
"uploaded_on": "2017-06-16 07:51:35",
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 07:51:35"
},
{
"id": "305",
"contributor_id": "16",
"table_of_content_id": "6791",
"composition_id": "7470",
"completion": "2017-06-30",
"approved": null,
"cdn_id": "328318377",
"secret_token": "s-naSse",
"uploaded_on": "2017-06-16 10:43:39",
"created": "2017-06-16 07:48:31",
"modified": "2017-06-16 10:43:39"
}
]
}
答案 2 :(得分：0)
使用此网址将json作为模型
http://pojo.sodhanalibrary.com/
ArrayList<Booking> bookingeventModelList=new Arrayllist();
JSONArray array=new JsonArray("savebooking")
for(int i=0;i<array.size;i++)
{
Type listType = new TypeToken<List<Booking>>() {
}.getType();
bookingeventModelList= gson.fromJson(array.get(i), listType);
}
答案 3 :(得分：0)
试试这个我的朋友
像这样读取json数据
try{
Booking myBooking= new Booking();
//Here is main response object
JSONObject json = new JSONObject(response);
//now you have json array
JSONArray booking = json.getJSONArray("savebooking");
// now get your json array data
if(booking.length ()> 0){
for(int i=0;i<booking.length ();i++){
// now get you all data like this
JSONObject bookingObject = booking.getJsonObject(i);
myBooking.setId( bookingObject.getString("id"));
myBooking.setContributor_id( bookingObject.getString("contributor_id"));
list.addAll(myBooking);
}
}
}catch (Exception e){
Log.e("Error",e+"");
}
像这样创建一个模型类。
public class Booking {
private String id;
private String contributor_id;
private String table_of_content_id;
private String composition_id;
private String completion;
private String approved;
private String cdn_id ;
private String secret_token;
private String uploaded_on;
private String created;
private String modified;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getContributor_id() {
return contributor_id;
}
public void setContributor_id(String contributor_id) {
this.contributor_id = contributor_id;
}
public String getTable_of_content_id() {
return table_of_content_id;
}
public void setTable_of_content_id(String table_of_content_id) {
this.table_of_content_id = table_of_content_id;
}
public String getComposition_id() {
return composition_id;
}
public void setComposition_id(String composition_id) {
this.composition_id = composition_id;
}
public String getCompletion() {
return completion;
}
public void setCompletion(String completion) {
this.completion = completion;
}
public String getApproved() {
return approved;
}
public void setApproved(String approved) {
this.approved = approved;
}
public String getCdn_id() {
return cdn_id;
}
public void setCdn_id(String cdn_id) {
this.cdn_id = cdn_id;
}
public String getSecret_token() {
return secret_token;
}
public void setSecret_token(String secret_token) {
this.secret_token = secret_token;
}
public String getUploaded_on() {
return uploaded_on;
}
public void setUploaded_on(String uploaded_on) {
this.uploaded_on = uploaded_on;
}
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;
}
}
答案 4 :(得分：0)
你可以这样实现，尝试使用optJSONArray，optJSONObject和optString，而不是get，Get会给出异常但是如果你没有那个键，opt会给你null。
try {
JSONObject responseObject = new JSONObject(response);
JSONArray saveBookingArray = responseObject.optJSONArray("savebooking");
if (saveBookingArray == null || saveBookingArray.length() == 0) {
return;
}
for (int i = 0; i < saveBookingArray.length(); i++) {
JSONObject bookingJsonObject = saveBookingArray.optJSONObject(i);
if(bookingJsonObject == null) {
continue;
}
String id = bookingJsonObject.optString("id");
String contributorId = bookingJsonObject.optString("contributor_id");
String tofId = bookingJsonObject.optString("table_of_content_id");
String compositionId = bookingJsonObject.optString("composition_id");
String completion = bookingJsonObject.optString("completion");
String approved = bookingJsonObject.optString("approved");
String cdnId = bookingJsonObject.optString("cdn_id");
String secretToken = bookingJsonObject.optString("secret_token");
String uploadedOn = bookingJsonObject.optString("uploaded_on");
String created = bookingJsonObject.optString("created");
String modified = bookingJsonObject.optString("modified");
// You can create on Object and add it in list
}
} catch (JSONException e) {
e.printStackTrace();
}
答案 5 :(得分：0)
您可以选择将解析JsonArray的GSON库并将其添加到Model（POJO）中，也可以手动解析它。
对于手动解析，您可以尝试以下代码
StringRequest postStringRequest = new StringRequest（Request.Method.POST，BOOK_API， 新的Response.Listener（）{
@Override
public void onResponse(String response) {
Log.d(TAG, "Response Check :" + response);
try {
JSONObject json = new JSONObject(response);
JSONArray bookArray=json.getJSONArray("savebooking");
for (int i=0;i<bookArray.length();i++){
JSONObject bookObject=bookArray.getJSONObject(i);
String id = bookObject.optString("id");
String contributor_id= bookObject.optString("contributor_id");
String tbId = bookObject.optString("table_of_content_id");
String compositionId = bookObject.optString("composition_id");
String completion = bookObject.optString("completion");
String approved = bookObject.optString("approved");
String cdnId = bookObject.optString("cdn_id");
String secretToken = bookObject.optString("secret_token");
String uploadedOn = bookObject.optString("uploaded_on");
String created = bookObject.optString("created");
String modified = bookObject.optString("modified");
list.add(new YourModelName(id,contributor_id,.....)) //all required parameters
}
} catch (JSONException e) {
e.printStackTrace();
}
}