Java Android-解析JSON数据显示重复结果
我正在尝试从以下站点下载数据 这是我下载数据的Android代码 公共类DownloadTask扩展了AsyncTask{Java Android-解析JSON数据显示重复结果,java,android,json,networking,okhttp,Java,Android,Json,Networking,Okhttp,我正在尝试从以下站点下载数据 这是我下载数据的Android代码 公共类DownloadTask扩展了AsyncTask{ private List<Ingredients> tIngredients = new ArrayList<>(); private List<Steps> tSteps = new ArrayList<>(); String result; @Override protected String doInBackgrou
private List<Ingredients> tIngredients = new ArrayList<>();
private List<Steps> tSteps = new ArrayList<>();
String result;
@Override
protected String doInBackground(String... params) {
result = "";
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url("https://d17h27t6h515a5.cloudfront.net/topher/2017/May/59121517_baking/baking.json").build();
try {
result = client.newCall(request).execute().body().string();
Log.i("RESULT", result);
JSONArray rootArray = new JSONArray(result);
for (int i = 0; i < rootArray.length(); i++) {
JSONObject tempObject = rootArray.getJSONObject(i);
JSONArray ingredients = tempObject.getJSONArray("ingredients");
for(int j = 0 ; j< ingredients.length(); j++) {
JSONObject tempIngredient = ingredients.getJSONObject(j);
Ingredients newIngredient = new Ingredients(tempIngredient.getString("quantity"),
tempIngredient.getString("measure"),
tempIngredient.getString("ingredient"));
tIngredients.add(newIngredient);
j++;
}
JSONArray steps = tempObject.getJSONArray("steps");
for (int k = 0; k < steps.length(); k++) {
JSONObject tempStep = steps.getJSONObject(k);
Steps newStep = new Steps(tempStep.getString("id"), tempStep.getString("shortDescription"),
tempStep.getString("description"), tempStep.getString("videoURL"));
tSteps.add(newStep);
}
Recipe newRecipe = new Recipe(tempObject.getString("id"), tempObject.getString("name"), tempObject.getString("servings"), tIngredients, tSteps);
MainActivity.mRecipies.add(newRecipe);
}
} catch (Exception e) {
Log.i("TAG", e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(String s) {
for (int i = 0; i < MainActivity.mRecipies.size(); i++) {
Log.i("Recipie Number", String.valueOf(i));
for (int j = 0; j < MainActivity.mRecipies.get(i).getIngredients().size(); j++) {
Log.i("Ingre - ", MainActivity.mRecipies.get(i).getIngredients().get(j).getIngredient());
}
MainActivity.myList.setAdapter(MainActivity.myAdapter);
super.onPostExecute(s);
}
}
然后我想可能是因为我没有清理两个ArrayList
这是我为这两个命令添加clear命令时的结果
Log.i("RESULT", result);
JSONArray rootArray = new JSONArray(result);
for (int i = 0; i < rootArray.length(); i++) {
tIngredients.clear();
tSteps.clear();
JSONObject tempObject = rootArray.getJSONObject(i);
JSONArray ingredients = tempObject.getJSONArray("ingredients");
请说明原因,提前感谢。这两行需要进入您的循环:
private List<Ingredients> tIngredients = new ArrayList<>();
private List<Steps> tSteps = new ArrayList<>();
private List tingedints=new ArrayList();
private List tSteps=new ArrayList();
另外,第二个循环有一个额外的
j++
删除它。在第二个循环的doinbackground方法中,您将j变量增加两倍,一个用于循环j++,然后是循环内j++。除非您想跳过成分,否则您应该删除循环内的j++,您不需要字段
您需要每个配方的单独成分和步骤
你可能还想看看
JSONArray rootArray=新的JSONArray(结果);
//每种食谱
对于(int i=0;i
建议:
- 改造
- 格森
- 在活动类中不使用静态变量
配方
或Component
类尤其不应该有静态值。如果有,那么,是的,所有对象都是重复的,因为这些对象的所有实例只有一个静态值。非常感谢,我一定会尝试单例模式
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Recipie Number: 0
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Ingre -: Graham Cracker crumbs
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Ingre -: granulated sugar
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Ingre -: vanilla,divided
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Ingre -: large whole eggs
06-21 05:21:50.464 32625-32625/com.example.vamshi.baking I/Ingre -: heavy cream
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Recipie Number: 1
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: Graham Cracker crumbs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: granulated sugar
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: vanilla,divided
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: large whole eggs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: heavy cream
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Recipie Number: 2
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: Graham Cracker crumbs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: granulated sugar
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: vanilla,divided
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: large whole eggs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: heavy cream
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Recipie Number: 3
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: Graham Cracker crumbs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: granulated sugar
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: vanilla,divided
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: large whole eggs
06-21 05:21:50.465 32625-32625/com.example.vamshi.baking I/Ingre -: heavy cream
private List<Ingredients> tIngredients = new ArrayList<>();
private List<Steps> tSteps = new ArrayList<>();
JSONArray rootArray = new JSONArray(result);
// For each Recipe
for (int i = 0; i < rootArray.length(); i++) {
JSONObject tempObject = rootArray.getJSONObject(i);
JSONArray jIngredients = tempObject.getJSONArray("ingredients");
JSONArray jSteps = tempObject.getJSONArray("steps");
// Get the ingredients
List<Ingredients> ingredients = new ArrayList<>();
for(int j = 0 ; j< jIngredients.length(); j++) {
JSONObject tempIngredient = jIngredients.getJSONObject(j);
Ingredients newIngredient = new Ingredients(tempIngredient.getString("quantity"),
tempIngredient.getString("measure"),
tempIngredient.getString("ingredient"));
ingredients.add(newIngredient);
}
// Get the steps
List<Steps> steps = new ArrayList<>();
for (int j = 0; j < jSteps.length(); j++) {
JSONObject tempStep = jSteps.getJSONObject(j);
Steps newStep = new Steps(tempStep.getString("id"), tempStep.getString("shortDescription"),
tempStep.getString("description"), tempStep.getString("videoURL"));
steps.add(newStep);
}
// Create the recipe
Recipe newRecipe = new Recipe(tempObject.getString("id"), tempObject.getString("name"), tempObject.getString("servings"), ingredients, steps);
MainActivity.mRecipies.add(newRecipe);
}