我正在尝试解析Android应用程序的JSON文件。我设法在LogCat上查看文件内容，但我总是收到错误。 LogCat告诉我它期望一个字符串但是BEGIN_ARRAY。
主要活动类：
.../** Called when the activity is first created.
* @return */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Portrait only
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
//Remove title bar
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
//Remove notification bar
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
// Reading text file from assets folder
StringBuffer sb = new StringBuffer();
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(getAssets().open(
"test.json")));
String temp;
while ((temp = br.readLine()) != null)
sb.append(temp);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
br.close(); // stop reading
} catch (IOException e) {
e.printStackTrace();
}
}
String myjsonstring = sb.toString();
Log.d("string: " , myjsonstring);
Gson gson = new Gson();
ShopHeader orderHeader = gson.fromJson(myjsonstring, ShopHeader.class);
System.out.println("Shop Information --->");
System.out.println("Shop id: " + orderHeader.getId());
System.out.println("Shop url: " + orderHeader.getUrl());
System.out.println("Shop created_at: " + orderHeader.getCreated_at());
System.out.println("Shop updated_at: " + orderHeader.getUpdated_at());
System.out.println("Shop name: " + orderHeader.getName());
System.out.println("Shop phone: " + orderHeader.getPhone());
System.out.println("Shop fax: " + orderHeader.getFax());
System.out.println("Shop email: " + orderHeader.getEmail());
System.out.println("Shop website_url: " + orderHeader.getWebsite_url());
System.out.println("Shop detail: " + orderHeader.getDetail());
System.out.println("Shop logo_url: " + orderHeader.getLogo_url());
System.out.println("Shop logo_thumbnail_url: " + orderHeader.getLogo_thumbnail_url());
System.out.println("Shop photos_urls: " + orderHeader.getPhotos_urls());
System.out.println("Shop opening_hours: " + orderHeader.getOpening_hours());
ArrayList<ShopContact> contact = orderHeader.getContact();
for (int i=0; i<contact.size(); i++){
System.out.println("Contact Detail --->");
ShopContact contactDetail = contact.get(i);
System.out.println("Contact title : " + contactDetail.getTitle());
System.out.println("Contact first name : " + contactDetail.getFirst_name());
System.out.println("Contact last name: " + contactDetail.getLast_name());
System.out.println("Shop address_string: " + orderHeader.getAddress_string());
ArrayList<ShopAddress> address = orderHeader.getAddress();
for (int j=0; j<address.size(); j++){
System.out.println("Address Detail --->");
ShopAddress addressDetail = address.get(j);
System.out.println("Address id: " + addressDetail.getId());
System.out.println("Address url: " + addressDetail.getUrl());
System.out.println("Address created_at: " + addressDetail.getCreated_at());
System.out.println("Address updated_at: " + addressDetail.getUpdated_at());
System.out.println("Address street_address: " + addressDetail.getStreet_address());
System.out.println("Address extended_address: " + addressDetail.getExtended_address());
System.out.println("Address postal_code: " + addressDetail.getPostal_code());
System.out.println("Address locality: " + addressDetail.getLocality());
System.out.println("Address country_code_alpha2: " + addressDetail.getCountry_code_alpha2());
System.out.println("Address coordinates: " + addressDetail.getCoordinates());
ArrayList<ShopBooklet> booklet = orderHeader.getBooklet();
for (int k=0; k<booklet.size(); k++){
System.out.println("Booklet Detail --->");
ShopBooklet bookletDetail = booklet.get(k);
System.out.println("Booklet id: " + bookletDetail.getId());
System.out.println("Booklet url: " + bookletDetail.getUrl());
System.out.println("Booklet created_at: " + bookletDetail.getCreated_at());
System.out.println("Booklet updated_at: " + bookletDetail.getUpdated_at());
System.out.println("Booklet title: " + bookletDetail.getTitle());
System.out.println("Booklet thumbnail_url: " + bookletDetail.getThumbnail_url());
System.out.println("Booklet document_url: " + bookletDetail.getDocument_url());
System.out.println("Booklet presented: " + bookletDetail.getPresented());
}
...
修改：JSON的结构：
[
{
"id": "5295ca1e3131610014250000",
"url": "http://api.site.com/v1/shops/5295ca1e3131610014250000.json",
"created_at": "2013-11-27T11:31:58+01:00",
"updated_at": "2013-12-12T17:27:04+01:00",
"name": "NAME",
"phone": "05 46 05 02 96",
"fax": null,
"email": "mail@orange.fr",
"website_url": "http://api.site.com/",
"detail": null,
"logo_url": "http://s3.amazonaws.com/api.site.com/shops/logos/5295/ca1e/3131/6100/1425/0000/normal?1386586749",
"logo_thumbnail_url": "http://s3.amazonaws.com/api.site.com/shops/logos/5295/ca1e/3131/6100/1425/0000/thumb/test.jpg?1386586749",
"photos_urls": [
"http://s3.amazonaws.com/api.site.com/shops/image1s/5295/ca1e/3131/6100/1425/0000/normal/test.jpg?1386604322"
],
"opening_hours": [
null,
null,
null,
null,
null,
null,
null
],
"contact": {
"title": "M.",
"first_name": "First",
"last_name": "Name"
},
"address_string": "Address",
"address": {
"id": "defe",
"url": "http://api.site.com/v1/addresses/5295ca1e3131610014270000.json",
"created_at": "2013-11-27T11:31:58+01:00",
"updated_at": "2013-12-11T20:46:54+01:00",
"street_address": "address",
"extended_address": null,
"postal_code": "40303",
"locality": "City",
"country_code_alpha2": "uk",
"coordinates": [
27.6232869,
-8.0304642
]
},
"booklet": {
"id": "dldl",
"url": "http://api.site.com/v1/booklets/5295ca1e3131610014280000.json",
"created_at": "2013-11-27T11:31:58+01:00",
"updated_at": "2013-12-13T18:32:33+01:00",
"title": "Name",
"thumbnail_url": "http://s3.amazonaws.com/api.site.com/booklets/documents/5295/ca1e/3131/6100/1428/0000/thumb/name.png?1386955949",
"document_url": "http://s3.amazonaws.com/api.site.com/booklets/documents/5295/ca1e/3131/6100/1428/0000/original/name.pdf?1386955949",
"presented": false
}
}
]
编辑：这是标题类
import java.util.ArrayList;
public class ShopHeader {
String id = null;
String url = null;
String created_at = null;
String updated_at = null;
String name = null;
String phone = null;
String fax = null;
String email = null;
String website_url = null;
String detail = null;
String logo_url = null;
String logo_thumbnail_url = null;
String photos_urls = null;
String opening_hours = null;
ArrayList<ShopContact>contact;
String address_string = null;
ArrayList<ShopAddress>address;
ArrayList<ShopBooklet>booklet;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getCreated_at() {
return created_at;
}
public void setCreated_at(String created_at) {
this.created_at = created_at;
}
public String getUpdated_at() {
return updated_at;
}
public void setUpdated_at(String updated_at) {
this.updated_at = updated_at;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getFax() {
return fax;
}
public void setFax(String fax) {
this.fax = fax;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getWebsite_url() {
return website_url;
}
public void setWebsite_url(String website_url) {
this.website_url = website_url;
}
public String getDetail() {
return detail;
}
public void setDetail(String detail) {
this.detail = detail;
}
public String getLogo_url() {
return logo_url;
}
public void setLogo_url(String logo_url) {
this.logo_url = logo_url;
}
public String getLogo_thumbnail_url() {
return logo_thumbnail_url;
}
public void setLogo_thumbnail_url(String logo_thumbnail_url) {
this.logo_thumbnail_url = logo_thumbnail_url;
}
public String getPhotos_urls() {
return photos_urls;
}
public void setPhotos_urls(String photos_urls) {
this.photos_urls = photos_urls;
}
public String getOpening_hours() {
return opening_hours;
}
public void setOpening_hours(String opening_hours) {
this.opening_hours = opening_hours;
}
public ArrayList<ShopContact> getContact() {
return contact;
}
public void setContact(ArrayList<ShopContact> contact) {
this.contact = contact;
}
public String getAddress_string() {
return address_string;
}
public void setAddress_string(String address_string) {
this.address_string = address_string;
}
public ArrayList<ShopAddress> getAddress() {
return address;
}
public void setAddress(ArrayList<ShopAddress> address) {
this.address = address;
}
public ArrayList<ShopBooklet> getBooklet() {
return booklet;
}
public void setBooklet(ArrayList<ShopBooklet> booklet) {
this.booklet = booklet;
}
}
Elevine请求的LogCat：
12-26 14:46:42.226: E/AndroidRuntime(1931): FATAL EXCEPTION: main
12-26 14:46:42.226: E/AndroidRuntime(1931): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.begital.votrebijoutier/com.begital.votrebijoutier.ShopActivity}: java.lang.IllegalStateException: This is not a JSON Array.
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread.access$600(ActivityThread.java:130)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.os.Handler.dispatchMessage(Handler.java:99)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.os.Looper.loop(Looper.java:137)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-26 14:46:42.226: E/AndroidRuntime(1931): at java.lang.reflect.Method.invokeNative(Native Method)
12-26 14:46:42.226: E/AndroidRuntime(1931): at java.lang.reflect.Method.invoke(Method.java:511)
12-26 14:46:42.226: E/AndroidRuntime(1931): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-26 14:46:42.226: E/AndroidRuntime(1931): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-26 14:46:42.226: E/AndroidRuntime(1931): at dalvik.system.NativeStart.main(Native Method)
12-26 14:46:42.226: E/AndroidRuntime(1931): Caused by: java.lang.IllegalStateException: This is not a JSON Array.
12-26 14:46:42.226: E/AndroidRuntime(1931): at com.google.gson.JsonElement.getAsJsonArray(JsonElement.java:106)
12-26 14:46:42.226: E/AndroidRuntime(1931): at com.begital.votrebijoutier.ShopActivity.onCreate(ShopActivity.java:87)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.Activity.performCreate(Activity.java:5008)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
12-26 14:46:42.226: E/AndroidRuntime(1931): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
12-26 14:46:42.226: E/AndroidRuntime(1931): ... 11 more
12-26 14:48:16.306: E/AndroidRuntime(2087): FATAL EXCEPTION: main
12-26 14:48:16.306: E/AndroidRuntime(2087): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.begital.votrebijoutier/com.begital.votrebijoutier.ShopActivity}: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_ARRAY at line 1 column 659
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread.access$600(ActivityThread.java:130)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.os.Handler.dispatchMessage(Handler.java:99)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.os.Looper.loop(Looper.java:137)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-26 14:48:16.306: E/AndroidRuntime(2087): at java.lang.reflect.Method.invokeNative(Native Method)
12-26 14:48:16.306: E/AndroidRuntime(2087): at java.lang.reflect.Method.invoke(Method.java:511)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-26 14:48:16.306: E/AndroidRuntime(2087): at dalvik.system.NativeStart.main(Native Method)
12-26 14:48:16.306: E/AndroidRuntime(2087): Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_ARRAY at line 1 column 659
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.Gson.fromJson(Gson.java:803)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.Gson.fromJson(Gson.java:768)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.Gson.fromJson(Gson.java:717)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.Gson.fromJson(Gson.java:689)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.begital.votrebijoutier.ShopActivity.onCreate(ShopActivity.java:89)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.Activity.performCreate(Activity.java:5008)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
12-26 14:48:16.306: E/AndroidRuntime(2087): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
12-26 14:48:16.306: E/AndroidRuntime(2087): ... 11 more
12-26 14:48:16.306: E/AndroidRuntime(2087): Caused by: java.lang.IllegalStateException: Expected a string but was BEGIN_ARRAY at line 1 column 659
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.stream.JsonReader.nextString(JsonReader.java:821)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:358)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:346)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
12-26 14:48:16.306: E/AndroidRuntime(2087): at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
12-26 14:48:16.306: E/AndroidRuntime(2087): ... 19 more
12-26 15:00:37.516: E/AndroidRuntime(2355): FATAL EXCEPTION: main
12-26 15:00:37.516: E/AndroidRuntime(2355): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.begital.votrebijoutier/com.begital.votrebijoutier.ShopActivity}: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected STRING but was BEGIN_ARRAY
答案 0 :(得分：0)
您的JSON是一个包含一个对象的数组。该对象映射到您的ShopHeader类。但是，在您的代码中，您尝试将该JSON作为单个ShopHeader对象读取：
ShopHeader orderHeader = gson.fromJson(myjsonstring, ShopHeader.class);
您需要告诉GSON将其作为数组或ShopHeader列表读取。以下可能有效：
List<ShopHeader> orderHeaders = gson.fromJson(myjsonstring, ShopHeader.class);
ShopHeader orderHeader = orderHeaders.get(0);