Android - How can I access nested objects? - json

Question

I know this question has been brought up quite often, but so far I didn't really find an answer...
I am trying to use Android with GSON. I want to use a JSON String to fill a Gridview but I dont know how to access the nested objects.
The JSON File:
[{'ProductCategories':[
{
'name':'Cat1', 'Product Series':[
{
'name':'ProdSeries1', 'Description':'Lorem Ipsum Bla Bla','Products':[
{
'name':'Product1','key':'value','key':'...'
},
{
'name':'Product2','key':'value','key':'...'
},
]
}
]
},
]
}]
I made 4 classes:Products,ProductSeries,ProductCatalog and ProductCategory.
example:
public class ProductCatalog {
#SerializedName("ProductCategories")
#Expose
private List<ProductCategory> productCategories = null;
public List<ProductCategory> getProductCategories() {
return productCategories;
}
public void setProductCategories(List<ProductCategory> productCategories) {
this.productCategories = productCategories;
}
}
After that I parsed the JSON with gson:
Gson gson = new Gson();
Type type = new TypeToken<List<ProductCatalog>>(){}.getType();
List<ProductCatalog> productcatalog = gson.fromJson(JSONstring,type);
Now I have a parsed list of the JSON data but dont know how to work with the nested objects like 'Product1'. I thought the getters would help, but I cant access getProductCategories() in my activity. How can I do that?

Answer 1

If your using Gson means This will help you
public class MainClazz {
#SerializedName("ProductCategories")
#Expose
private List<ProductCategory> productCategories = null;
public List<ProductCategory> getProductCategories() {
return productCategories;
}
public void setProductCategories(List<ProductCategory> productCategories) {
this.productCategories = productCategories;
}
}
public class Product {
#SerializedName("name")
#Expose
private String name;
#SerializedName("key")
#Expose
private String key;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
}
public class ProductCategory {
#SerializedName("name")
#Expose
private String name;
#SerializedName("Product Series")
#Expose
private List<ProductSeries> productSeries = null;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<ProductSeries> getProductSeries() {
return productSeries;
}
public void setProductSeries(List<ProductSeries> productSeries) {
this.productSeries = productSeries;
}
}
public class ProductSeries {
#SerializedName("name")
#Expose
private String name;
#SerializedName("Description")
#Expose
private String description;
#SerializedName("Products")
#Expose
private List<Product> products = null;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public List<Product> getProducts() {
return products;
}
public void setProducts(List<Product> products) {
this.products = products;
}
}