我想使用Retrofit2和Gson库以GET方式接收Json的字符串列表。当我使用POSTMAN从.../titlefaqsjson?_format=json
进行GET时,我会以这种方式收到Json:
[
{
"tid": [
{
"value": 27
}
],
"uuid": [
{
"value": "b3d3c5bb-6a8b-40c1-bafe-d4ddf3a45ff3"
}
],
"langcode": [
{
"value": "en"
}
],
"vid": [
{
"target_id": "faq",
"target_type": "taxonomy_vocabulary",
"target_uuid": "a225614a-917b-4b0d-861b-9113d5a47fa3"
}
],
"name": [
{
"value": "Buscar una SocialFood"
}
],
"description": [
{
"value": null,
"format": null,
"processed": ""
}
],
"weight": [
{
"value": 0
}
],
"parent": [],
"changed": [
{
"value": "2018-05-31T11:42:24+00:00",
"format": "Y-m-d\\TH:i:sP"
}
],
"default_langcode": [
{
"value": true
}
],
"path": [
{
"alias": "/faq/soy-socialguest/buscar-una-socialfood",
"pid": 35,
"langcode": "en"
}
]
},
{
"tid": [
{
"value": 28
}
],
"uuid": [
{
"value": "e2d05fc8-840c-4cc2-8df2-2cd2bf45ee85"
}
],
"langcode": [
{
"value": "en"
}
],
"vid": [
{
"target_id": "faq",
"target_type": "taxonomy_vocabulary",
"target_uuid": "a225614a-917b-4b0d-861b-9113d5a47fa3"
}
],
"name": [
{
"value": "Cancelar una reserva antes de la SocialFood"
}
],
"description": [
{
"value": null,
"format": null,
"processed": ""
}
],
"weight": [
{
"value": 1
}
],
"parent": [],
"changed": [
{
"value": "2018-05-31T11:53:54+00:00",
"format": "Y-m-d\\TH:i:sP"
}
],
"default_langcode": [
{
"value": true
}
],
"path": [
{
"alias": "/faq/soy-socialguest/cancelar-una-reserva-antes-de-la-socialfood",
"pid": 36,
"langcode": "en"
}
]
}, etc..
我具有以这种方式声明GET的接口:
public interface ApiSocialFood {
@GET("titlefaqsjson?_format=json")
Call<ResponseFaqs> faqs();
}
ResponseFaqs对象的类是一个简单的类,以字符串列表作为属性,构造函数以及相应的getter和setter。
接收到的Json的Desserializer代码为:
public class FaqsDeserializador implements JsonDeserializer {
@Override
public ResponseFaqs deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
JsonArray arrayJson = json.getAsJsonObject().get("name").getAsJsonArray();
List<String> lista= new ArrayList<String>();
for (int i=0;i<arrayJson.size();i++){
Log.d("xxx",arrayJson.get(i).getAsJsonObject().get("value").getAsString());
lista.add(arrayJson.get(i).getAsJsonObject().get("value").getAsString());
}
ResponseFaqs respuesta = new ResponseFaqs(lista);
return respuesta;
}
}
我通过以下方式在Activity的onCreate方法中执行所有操作:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity__preguntas__frecuentes);
tvTitulo1= (TextView) findViewById(R.id.textView13);
GsonBuilder builder=new GsonBuilder();
builder.registerTypeAdapter(ResponseFaqs.class,new FaqsDeserializador());
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Api.URL_BASE)
.addConverterFactory(GsonConverterFactory.create(builder.create()))
.build();
ApiSocialFood Service = retrofit.create(ApiSocialFood.class);
Call<ResponseFaqs> peticionFaqs=Service.faqs();
peticionFaqs.enqueue(new Callback<ResponseFaqs>() {
@Override
public void onResponse(Call<ResponseFaqs> call, Response<ResponseFaqs> response) {
if (response.code()== HttpURLConnection.HTTP_OK) {
Toast.makeText(Activity_Preguntas_Frecuentes.this, "DENTRO DE LA IMAGEN", Toast.LENGTH_LONG).show();
List<String> listafaqs = response.body().getListafaqs();
tvTitulo1.setText(listafaqs.get(0));
}else{
Toast.makeText(Activity_Preguntas_Frecuentes.this, "NO HTTP_OK", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(Call<ResponseFaqs> call, Throwable t) {
Toast.makeText(Activity_Preguntas_Frecuentes.this,"FALLO CONEXION",Toast.LENGTH_SHORT);
}
});
}
但是,当我输入要在任何时候加载列表的活动时,程序将进入OnResponse方法。为什么不输入?我以相同的方式获取另一个json的名称和url,并且效果很好,我不知道为什么在这种情况下不起作用。
预先感谢:)
答案 0 :(得分:0)
我找到了解决方法!
在计算机科学中,大多数时候,错误都是您所错过的愚蠢。
在这种情况下,返回的Json以arrayJson开头,而不是以Json对象开头,因此您所要做的就是添加反序列化此步骤的方法。
反序列化类如下:
公共类FaqsDeserializador实现JsonDeserializer {
@Override
public ResponseFaqs deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
JsonArray arrayJson = json.getAsJsonArray();
List<String> lista= new ArrayList<String>();
for (int i=0;i<arrayJson.size();i++){
Log.d("SocialFoodAPPAlvaro",arrayJson.get(i).getAsJsonObject().get("name").getAsJsonArray().get(0).getAsJsonObject().get("value").getAsString());
lista.add(arrayJson.get(i).getAsJsonObject().get("name").getAsJsonArray().get(0).getAsJsonObject().get("value").getAsString());
}
ResponseFaqs respuesta = new ResponseFaqs(lista);
return respuesta;
}