I want to get the data from the 'number' and 'step' properties, but can't seem to find a solution. I'm a beginner at android, so would really appreciate your help
**Here is the json ** https://api.myjson.com/bins/135pdu
Here is my code
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, uri,null,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
String count,step;
try {
Log.d("VolleyResponse","Response:" + response);
for(int i = 0; i<response.length();i++){
JSONObject current = response.getJSONObject(i);
JSONArray arrayStatus = current.getJSONArray("steps");
for(int a = 0; a<arrayStatus.length(); a++){
JSONObject recipe_step = arrayStatus.getJSONObject(i);
count = recipe_step.getString("number");
step = recipe_step.getString("step");
steps.append("Step " +count+":"+step+"\n\n");
}
}
}catch(JSONException e){
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("VolleyError", error.toString());
}
count = recipe_step.getString("number");
步骤号是整数而不是字符串,请尝试:
int count; count = recipe_step.getInt("number");
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, uri,null,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
String count,step;
try {
Log.d("VolleyResponse","Response:" + response);
for(int i = 0; i<response.length();i++){
JSONObject current = response.getJSONObject(i);
JSONArray arrayStatus = current.getJSONArray("steps");
for(int a = 0; a<arrayStatus.length(); a++){
JSONObject recipe_step = arrayStatus.getJSONObject(i);
count = recipe_step.getInt("number")+"";
step = recipe_step.getString("step");
steps.append("Step " +count+":"+step+"\n\n");
}
}
}catch(JSONException e){
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("VolleyError", error.toString());
}
use getInt() for numbers
I believe in smart work instead of long work.
I prefer 2 line code to parse instead of writing whole things to parse json.
Type listType = new TypeToken<List<Response>>() {}.getType();
List<Response> yourList = new Gson().fromJson(yourJson, listType);
Now all values are in your list, use it anywhere :)
Google Gson is a well known library to parse json. Just add a small library implementation 'com.google.code.gson:gson:2.8.4'
to your app level build.gradle.
Thats all, Just you have to make pojo (or model) classes that will hold variables of your response.
-----------------------------------com.example.Equipment.java-----------------------------------
package com.example;
public class Equipment {
private Integer id;
private String name;
private String image;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
-----------------------------------com.example.Ingredient.java-----------------------------------
package com.example;
public class Ingredient {
private Integer id;
private String name;
private String image;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
-----------------------------------com.example.Response.java-----------------------------------
package com.example;
import java.util.List;
public class Response {
private String name;
private List<Step> steps = null;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Step> getSteps() {
return steps;
}
public void setSteps(List<Step> steps) {
this.steps = steps;
}
}
-----------------------------------com.example.Step.java-----------------------------------
package com.example;
import java.util.List;
public class Step {
private Integer number;
private String step;
private List<Ingredient> ingredients = null;
private List<Equipment> equipment = null;
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
public String getStep() {
return step;
}
public void setStep(String step) {
this.step = step;
}
public List<Ingredient> getIngredients() {
return ingredients;
}
public void setIngredients(List<Ingredient> ingredients) {
this.ingredients = ingredients;
}
public List<Equipment> getEquipment() {
return equipment;
}
public void setEquipment(List<Equipment> equipment) {
this.equipment = equipment;
}
}
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