Question

您好我正在尝试学习Android并且目前正在实施改造，并尝试使用相关帖子解决这个问题，遗憾的是没有帮助我请听我说。

我有一个json数据，我需要在这里解析它是

{
"-KNea90tV5nZlkeqxc3Q": {
    "accountName": "Mark Angelo Noquera",
    "accountNumber": "12435656443",
    "accountType": "Peso Savings"
},
"-KNeaPmBoTXV4mQC6cia": {
    "accountName": "Mark Angelo Noquera",
    "accountNumber": "12435656444",
    "accountType": "Peso Checking"
},
"-KNeaWe_ZbtI9Tn6l-oF": {
    "accountName": "Mark Angelo Noquera",
    "accountNumber": "12435656445",
    "accountType": "Personal Loan"
}}

然后一些教程告诉我使用hashmap所以我实现了我的这是我的ModelClass1.class

public class MarkSamples {
public HashMap<String, MarkSample> marksamples;
public HashMap<String, MarkSample> getMarksamples() {
    return marksamples;
}}

ModeClass2.class - 用于处理对象

public class MarkSample {

@SerializedName("accountName")
public String acntName;
@SerializedName("accountNumber")
public String acntNumber;
@SerializedName("accountType")
public String acntType;

public String getName() {
    return (acntName);
}

public void setName(String acntName) {
    this.acntName = acntName;
}

public String getNumber() {
    return (acntNumber);
}

public void setNumber(String acntNumber) {
    this.acntNumber = acntNumber;
}

public String getType() {
    return (acntType);
}

public void setType(String acntType) {
    this.acntType = acntType;
}

}

我的API在这里更新

public interface ContactsAPI {
      @GET("/api/accounts.json")
public void getSamples(Callback<HashMap<String, MarkSample>> response);}

最后我在这里打电话给我的经纪人更新

       api.getSamples(new Callback<HashMap<String, MarkSample>>() {
                @Override
                public void success(HashMap<String, MarkSample> stringMarkSampleHashMap, Response response) {
                    loading.dismiss();
                    int mint = stringMarkSampleHashMap.size();
                    Toast.makeText(mainActivity, mint, Toast.LENGTH_SHORT).show();
                }

                @Override
                public void failure(RetrofitError error) {

                }
            });

每次我举起结果我得到一个空值我没有实现它错了吗？我确定我正确使用了我的RootUrl如果这不是问题我可以使用的其他方法是什么？请帮帮我。

这是我的Logcat 更新

FATAL EXCEPTION: main
                                                                     Process: com.exist.kelvs.retrofit2, PID: 2517
                                                                     android.content.res.Resources$NotFoundException: String resource ID #0x3
                                                                         at android.content.res.Resources.getText(Resources.java:312)
                                                                         at android.widget.Toast.makeText(Toast.java:286)
                                                                         at com.exist.kelvs.retrofit2.RetrofitHandler$2.success(RetrofitHandler.java:51)
                                                                         at com.exist.kelvs.retrofit2.RetrofitHandler$2.success(RetrofitHandler.java:46)
                                                                         at retrofit.CallbackRunnable$1.run(CallbackRunnable.java:45)
                                                                         at android.os.Handler.handleCallback(Handler.java:739)
                                                                         at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                         at android.os.Looper.loop(Looper.java:148)
                                                                         at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                         at java.lang.reflect.Method.invoke(Native Method)
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

将api定义更新为：

@GET("/api/accounts.json")
public void getSamples(Map<String,MarkSample> response);}

api致电：

api.getSamples(new Callback<Map<String,MarkSample>() {
        @Override
        public void success(Map<String,MarkSample> samplelist, Response response) {
            loading.dismiss();
            int mint = samplelist.size();
...

<强>更新

要获取所有帐户名，请将此代码添加到回调中：

...

loading.dismiss();
int mint = 0;
if (samplelist!=null){  
  mint = samplelist.size(); 
  for (MarkSample item:samplelist.values()){
    Log.d("TEST","value: "+item.getName(); 
  }
}
...

Answer 2

查看这篇文章： Getting Starter with Retrofit 2

使用设置转换器工厂的Retrofit2调用来排队数据

您的问题是序列化：响应中没有marksamples字段。您不需要特殊的MarkSamples类。看看如何修改代码：

public interface ContactsAPI {

    @GET("/api/accounts.json")
    Call<LinkedHashMap<String, MarkSample>> getSamples();

    Retrofit retrofit = new Retrofit.Builder()
        .baseUrl(" https://pbcom.firebaseio.com")
        .addConverterFactory(GsonConverterFactory.create())
        .build();
}

并请求：

ContactsAPI api = ContactsAPI.retrofit.create(ContactsAPI.class);
Call<LinkedHashMap<String, MarkSample>> call = api.getSamples();
call.enqueue(new Callback<LinkedHashMap<String, MarkSample>>() {
    @Override
    public void onResponse(Call<LinkedHashMap<String, MarkSample>> call, Response<LinkedHashMap<String, MarkSample>> response) {
        LinkedHashMap<String, MarkSample>> samples = response.body();
    }

    @Override
    public void onFailure(Call<LinkedHashMap<String, MarkSample>> call, Throwable t) {

    }
});

改造HashMap为空

2 个答案: