【发布时间】：2014-08-01 03:12:47
【问题描述】：
我正在使用包含 GSON 的 Azure SDK 将来自 Microsoft Azure 的查询结果存储到一个类中。我一直按照此示例中的说明进行操作：http://blogs.msdn.com/b/carlosfigueira/archive/2013/06/19/custom-api-in-azure-mobile-services-client-sdks.aspx
所以我能够将一个简单的示例保存到一个包含所有字符串的类中。但是，当我尝试将数据存储到包含 ArrayList 在内的混合类型的类中时，我遇到了障碍。这是我的课：
class clsUser {
public String UserID;
public String UserName;
public String UserStatus;
public ArrayList<String> UserEmails;
//Constructors, methods, etc
}
一个 clsUser 实例可以有 0 个或多个 UserEmail，所以我使用 ArrayList。我应该说我一直在我的应用程序中使用这个类 - 提取 JSON 数据是新的，但我想走这条路。
JsonObject 看起来像这样：
{"UserID":85,"UserName":null,"UserEmails":"Call.Me@Maybe.org","UserStatus":"T"}
我也尝试过调整 API，使其返回以下各项：
{"UserID":85,"UserName":null,"UserEmails":"[Call.Me@Maybe.org]","UserStatus":"T"}
{"UserID":85,"UserName":null,"UserEmails":"[{Call.Me@Maybe.org}]","UserStatus":"T"}
我收到一个错误“Expected BEGIN_ARRAY but was STRING”，我知道这意味着它将“Call.Me@Maybe.org”视为一个字符串，但我怎样才能让它进入 ArrayList 字段？：
07-31 22:59:18.776 27842-27842/com.myapp.app.debug E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.myapp.app.debug, PID: 27842
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:859)
at com.google.gson.Gson.fromJson(Gson.java:832)
at com.microsoft.windowsazure.mobileservices.JsonEntityParser.parseResults(JsonEntityParser.java:62)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$4.onCompleted(MobileServiceClient.java:615)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$5.onResponse(MobileServiceClient.java:710)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$6.onPostExecute(MobileServiceClient.java:825)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$6.onPostExecute(MobileServiceClient.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING
at com.google.gson.internal.bind.JsonTreeReader.expect(JsonTreeReader.java:139)
at com.google.gson.internal.bind.JsonTreeReader.beginArray(JsonTreeReader.java:58)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:859)
at com.google.gson.Gson.fromJson(Gson.java:832)
at com.microsoft.windowsazure.mobileservices.JsonEntityParser.parseResults(JsonEntityParser.java:62)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$4.onCompleted(MobileServiceClient.java:615)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$5.onResponse(MobileServiceClient.java:710)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$6.onPostExecute(MobileServiceClient.java:825)
at com.microsoft.windowsazure.mobileservices.MobileServiceClient$6.onPostExecute(MobileServiceClient.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
我认为错误出在数据或类中，但为了完整起见，这是我正在使用的代码。在错误出现之前，所有日志都没有机会运行：
List<Pair<String, String>> params = new ArrayList<Pair<String, String>>();
params.add(new Pair<String, String>("email", emailtext));
params.add(new Pair<String, String>("token", Token));
Azure.invokeApi("user/login", "GET", params, clsUser.class, new ApiOperationCallback<clsUser>() {
@Override
public void onCompleted(clsUser result, Exception e, ServiceFilterResponse response) {
if (e == null) {
Log.d("Login GetToken","Azure success: ID=" + result.getUserID());
Log.d("Login GetToken","Azure success: " + result.getAll().toString());
currentUser = result;
} else {
Log.d("Login GetToken","Azure Error: " + e.toString());
}
}
});
有人有这种混班的经验吗？
【问题讨论】：
-
我认为 Json 的格式应该是：{"UserID":85,"UserName":null,"UserEmails":["Call.Me@Maybe.org"],"UserStatus" :"T"}
标签： java android json azure gson