Java 如何将此JSONArray存储到ArrayList中？

我从API Get调用的

JSONArray

构建

ArrayList

时遇到一些问题。我收到一张空名单。我打电话的时候做错了什么

我试图接收的

JSONArray

是“

recipes

”。我只需要“

title

”和“

image\u url

”

方法检索JSONArray并将其存储到ArrayList中

public class JsonHelper {
public List<Recipe> getRecipes(String jsonText) {

    List<Recipe> list = new ArrayList<Recipe>();

    try {
        JSONObject jsonObject = new JSONObject(jsonText);
        JSONArray jsonArrayRecipes = jsonObject.getJSONArray("recipes");

        for (int i = 0; i < jsonArrayRecipes.length(); i++) {

           JSONObject jsonObjectRecipe = jsonArrayRecipes.getJSONObject(i);

            Recipe recipe = new Recipe();
            recipe.setImage_url(jsonObjectRecipe.getString("title"));
            recipe.setName(jsonObjectRecipe.getString("image_url"));
            list.add(recipe);
        }
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    return list;
}}

---

任何帮助都将不胜感激。提前谢谢

我想这对你有用

public ArrayList<HashMap<String, String>> getRecipes(String jsonText) {
        ArrayList<HashMap<String, String>> arra_list = new ArrayList<>();
        try {
            JSONObject jsonObject = new JSONObject(jsonText);
            JSONArray recipesJsonArray = jsonObject.getJSONArray("recipes");
            for (int i = 0; i < recipesJsonArray.length(); i++) {
                HashMap<String, String> hashMap = new HashMap<>();
                JSONObject jsonObject1 = recipesJsonArray.getJSONObject(i);
                hashMap.put("title", jsonObject1.getString("title"));
                hashMap.put("image_url", jsonObject1.getString("image_url"));
                arra_list.add(hashMap);
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }
        return arra_list;
    }

public ArrayList getRecipes（字符串jsonText）{
ArrayList arra_list=新的ArrayList（）；
试一试{
JSONObject JSONObject=新的JSONObject（jsonText）；
JSONArray recipes JSONArray=jsonObject.getJSONArray（“recipes”）；
对于（int i=0；i

首先创建一个类名配方，如下所示

public class Recipe {

private String publisher;
private String f2fUrl;
private String title;
private String sourceUrl;
private String recipeId;
private String imageUrl;
private Double socialRank;
private String publisherUrl;

/**
* 
* @return
* The publisher
*/
public String getPublisher() {
return publisher;
}

/**
* 
* @param publisher
* The publisher
*/
public void setPublisher(String publisher) {
this.publisher = publisher;
}

/**
* 
* @return
* The f2fUrl
*/
public String getF2fUrl() {
return f2fUrl;
}

/**
* 
* @param f2fUrl
* The f2f_url
*/
public void setF2fUrl(String f2fUrl) {
this.f2fUrl = f2fUrl;
}

/**
* 
* @return
* The title
*/
public String getTitle() {
return title;
}

/**
* 
* @param title
* The title
*/
public void setTitle(String title) {
this.title = title;
}

/**
* 
* @return
* The sourceUrl
*/
public String getSourceUrl() {
return sourceUrl;
}

/**
* 
* @param sourceUrl
* The source_url
*/
public void setSourceUrl(String sourceUrl) {
this.sourceUrl = sourceUrl;
}

/**
* 
* @return
* The recipeId
*/
public String getRecipeId() {
return recipeId;
}

/**
* 
* @param recipeId
* The recipe_id
*/
public void setRecipeId(String recipeId) {
this.recipeId = recipeId;
}

/**
* 
* @return
* The imageUrl
*/
public String getImageUrl() {
return imageUrl;
}

/**
* 
* @param imageUrl
* The image_url
*/
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}

/**
* 
* @return
* The socialRank
*/
public Double getSocialRank() {
return socialRank;
}

/**
* 
* @param socialRank
* The social_rank
*/
public void setSocialRank(Double socialRank) {
this.socialRank = socialRank;
}

/**
* 
* @return
* The publisherUrl
*/
public String getPublisherUrl() {
return publisherUrl;
}

/**
* 
* @param publisherUrl
* The publisher_url
*/
public void setPublisherUrl(String publisherUrl) {
this.publisherUrl = publisherUrl;
}

}

private void getRecipes(JSONObject response) {
        try {
            JSONArray recipes = response.getJSONArray("recipes");


            for (int i = 0; i < recipes.length(); i++) {
                JSONObject object = recipes.getJSONObject(i);
                Recipe recipe = new Recipe();
                recipe.setF2fUrl(object.getString("F2fUrl"));
                recipe.setImageUrl(object.getString("ImageUrl"));
                recipe.setPublisher(object.getString("Publisher"));
                recipe.setPublisherUrl(object.getString("PublisherUrl"));
                recipe.setRecipeId(object.getString("RecipeId"));
                recipe.setSocialRank(object.getDouble("SocialRank"));
                recipe.setSourceUrl(object.getString("SourceUrl"));
                recipe.setTitle(object.getString("Title"));
                recipesArrayList.add(recipe);
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }


    }

创建食谱的数组列表

ArrayList<Recipe> recipes =new ArrayList<>(); 

ArrayList recipes=new ArrayList（）；

像这样填写你的arraylist

public class Recipe {

private String publisher;
private String f2fUrl;
private String title;
private String sourceUrl;
private String recipeId;
private String imageUrl;
private Double socialRank;
private String publisherUrl;

/**
* 
* @return
* The publisher
*/
public String getPublisher() {
return publisher;
}

/**
* 
* @param publisher
* The publisher
*/
public void setPublisher(String publisher) {
this.publisher = publisher;
}

/**
* 
* @return
* The f2fUrl
*/
public String getF2fUrl() {
return f2fUrl;
}

/**
* 
* @param f2fUrl
* The f2f_url
*/
public void setF2fUrl(String f2fUrl) {
this.f2fUrl = f2fUrl;
}

/**
* 
* @return
* The title
*/
public String getTitle() {
return title;
}

/**
* 
* @param title
* The title
*/
public void setTitle(String title) {
this.title = title;
}

/**
* 
* @return
* The sourceUrl
*/
public String getSourceUrl() {
return sourceUrl;
}

/**
* 
* @param sourceUrl
* The source_url
*/
public void setSourceUrl(String sourceUrl) {
this.sourceUrl = sourceUrl;
}

/**
* 
* @return
* The recipeId
*/
public String getRecipeId() {
return recipeId;
}

/**
* 
* @param recipeId
* The recipe_id
*/
public void setRecipeId(String recipeId) {
this.recipeId = recipeId;
}

/**
* 
* @return
* The imageUrl
*/
public String getImageUrl() {
return imageUrl;
}

/**
* 
* @param imageUrl
* The image_url
*/
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}

/**
* 
* @return
* The socialRank
*/
public Double getSocialRank() {
return socialRank;
}

/**
* 
* @param socialRank
* The social_rank
*/
public void setSocialRank(Double socialRank) {
this.socialRank = socialRank;
}

/**
* 
* @return
* The publisherUrl
*/
public String getPublisherUrl() {
return publisherUrl;
}

/**
* 
* @param publisherUrl
* The publisher_url
*/
public void setPublisherUrl(String publisherUrl) {
this.publisherUrl = publisherUrl;
}

}

private void getRecipes(JSONObject response) {
        try {
            JSONArray recipes = response.getJSONArray("recipes");


            for (int i = 0; i < recipes.length(); i++) {
                JSONObject object = recipes.getJSONObject(i);
                Recipe recipe = new Recipe();
                recipe.setF2fUrl(object.getString("F2fUrl"));
                recipe.setImageUrl(object.getString("ImageUrl"));
                recipe.setPublisher(object.getString("Publisher"));
                recipe.setPublisherUrl(object.getString("PublisherUrl"));
                recipe.setRecipeId(object.getString("RecipeId"));
                recipe.setSocialRank(object.getDouble("SocialRank"));
                recipe.setSourceUrl(object.getString("SourceUrl"));
                recipe.setTitle(object.getString("Title"));
                recipesArrayList.add(recipe);
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }


    }

private void getRecipes（JSONObject响应）{
试一试{
JSONArray recipes=response.getJSONArray（“recipes”）；
对于（int i=0；i

---

我认为这将非常清楚地帮助您

这段代码的结果是什么？您想要什么？只需要将值转换为数组列表？实际问题是什么？发布实际错误对不起，伙计们，我是网站上的新成员。我发布了一些我用来进行API调用的方法的额外代码。问题是我收到一个空的ArrayList。我想我在JSONHelper中做错事了。我发现了问题所在。我的一节课上有个打字错误。我的结构和你给我的差不多！谢谢你的帮助！