Android:ArrayList Gson Deformat

我想知道如何使物体的Gson阵列列表变形

我得了下列疾病

public class Disease {

    private int diseaseID;
    private String diseaseName;
    private String diseaseDescription;
    private String diseaseImageURL;
}

使用变量的setter和getter

我有一个android布局中的微调器，我想用疾病名称填充它

下面是微调器代码

<Spinner
       android:id="@+id/consultation_deseases"
       android:layout_width="@dimen/bigSpinnerWidth"
       android:layout_height="@dimen/bigSpinnerHeight"
       android:prompt="@string/disease_prompt" />

我尝试使用下面的代码

Disease dis = gson.fromJson(json, Disease.class); 

但是我犯了以下错误

08-12 11:29:18.273: E/AndroidRuntime(7518): FATAL EXCEPTION: main
08-12 11:29:18.273: E/AndroidRuntime(7518): com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:180)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.Gson.fromJson(Gson.java:755)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.Gson.fromJson(Gson.java:721)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.Gson.fromJson(Gson.java:670)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.Gson.fromJson(Gson.java:642)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.example.onlineconsultation.LoginActivity$3.onClick(LoginActivity.java:117)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.view.View.performClick(View.java:3558)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.view.View$PerformClick.run(View.java:14152)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.os.Handler.handleCallback(Handler.java:605)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.os.Looper.loop(Looper.java:137)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at android.app.ActivityThread.main(ActivityThread.java:4514)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at java.lang.reflect.Method.invokeNative(Native Method)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at java.lang.reflect.Method.invoke(Method.java:511)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at dalvik.system.NativeStart.main(Native Method)
08-12 11:29:18.273: E/AndroidRuntime(7518): Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.stream.JsonReader.expect(JsonReader.java:339)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:322)
08-12 11:29:18.273: E/AndroidRuntime(7518):     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:168)

错误在这一行

Disease dis = gson.fromJson(json, Disease.class); 

问题已解决：

Disease[]dis=gson.fromJson（json，Disease[].class）

我很聪明地认识到我应该在一个疾病数组中得到响应，而不是在疾病对象=）
使用：
Disease[]dis=gson.fromJson（json，Disease[].class）

而不是
dis=gson.fromJson（json，Disease.class）
尝试一下，您需要将Json arraylist转换为Java arraylist

Gson gson = new Gson();
ArrayList<Disease> disArray = gson.fromJson(json, new TypeToken<List<Disease>>(){}.getType());

Gson-Gson=new-Gson（）；
ArrayList disArray=gson.fromJson（json，new-TypeToken（）{}.getType（））；

Gson gson = new Gson();
ArrayList<Disease> disArray = gson.fromJson(json, new TypeToken<List<Disease>>(){}.getType());