java – 在Android中解析JSON数组和对象（android中如何解析json数据）

25-01-30 22

本篇文章给大家谈谈java–在Android中解析JSON数组和对象，以及android中如何解析json数据的知识点，同时本文还将给你拓展Android-Gson解析JSON数据（JSON对象/JS

本篇文章给大家谈谈java – 在Android中解析JSON数组和对象，以及android中如何解析json数据的知识点，同时本文还将给你拓展Android-Gson解析JSON数据（JSON对象/JSON数组）、Android-解析JSON数据（JSON对象/JSON数组）、java – Android解析Json数组的字符串、java – 如何在Android中解析此JSON？等相关知识，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

java – 在Android中解析JSON数组和对象（android中如何解析json数据）
Android-Gson解析JSON数据（JSON对象/JSON数组）
Android-解析JSON数据（JSON对象/JSON数组）
java – Android解析Json数组的字符串
java – 如何在Android中解析此JSON？

java – 在Android中解析JSON数组和对象（android中如何解析json数据）

这就是JSON的样子：

[{
    "pmid": "2",
    "name": " MANAGEMENT",
    "result": "1",
    "properties": [
        {
            "prop_id": "32",
            "prop_name": "Bonneville",
            "address": "122 Lakeshore",
            "city": "Ripley",
            "state": "OH",
            "zip": "11454",
            "lat": "41.123",
            "long": "-85.5034"
        }
    ]
}]

我试图用Android中的以下Java代码解析它：

JSONObject jObj = null;
尝试{
jObj = new JSONObject(jsonStr);

    // We get weather info (This is an array)
    JSONArray jArr = jObj.getJSONArray("properties");

    // We use only the first value
    //JSONObject JSONWeather = jArr.getJSONObject(0);
    JSONObject c = jArr.getJSONObject(0);
    String name = c.getString(TAG_NAME);
    String email = c.getString(TAG_EMAIL);
    String phone = c.getString(TAG_PHONE);
} catch (JSONException e) {
    e.printstacktrace();
}

return null;

我没有得到任何结果.如何成功解析此JSON？我正在使用Android Studio.

此外,如果阵列中有多个部分,我们怎样才能确保它们中的每一个都被打印出来？

解决方法:

您的JSON字符串以JSONArray开头.

这里是示例代码,试一试.

    JSONArray mJsonArray = new JSONArray(jsonStr);
    JSONObject mJsonObject = mJsonArray.getJSONObject(0);

    String pmid = mJsonObject.getString("pmid");
    String name = mJsonObject.getString("name");
    String result = mJsonObject.getString("result");


    JSONArray mJsonArrayProperty = mJsonObject.getJSONArray("properties");
    for (int i = 0; i < mJsonArrayProperty.length(); i++) {
        JSONObject mJsonObjectProperty = mJsonArrayProperty.getJSONObject(i);

        String prop_id = mJsonObjectProperty.getString("prop_id");
        String prop_name = mJsonObjectProperty.getString("prop_name");
        String address = mJsonObjectProperty.getString("address");
        String city = mJsonObjectProperty.getString("city");
        String state = mJsonObjectProperty.getString("state");
        String zip = mJsonObjectProperty.getString("zip");
        String lat = mJsonObjectProperty.getString("lat");
        String lon = mJsonObjectProperty.getString("long");
    }

检查Android JSON Parsing Tutorial

Android-Gson解析JSON数据（JSON对象/JSON数组）

上一篇博客，Android-解析JSON数据（JSON对象/JSON数组），介绍了使用 org.json.JSONArray;/org.json.JSONObject; 来解析JSON数据；

Google Android 还提供来另外一种方式来解析JSON数据，那就是Gson；

Gson是非常方便的JSON解析/封装/处理等等，强大的工具类：

　　特点：Gson可以把JSON对象数据->转换映射为Bean对象

　　　　 Gson可以把JSON数组数据->转换映射为集合

　　　　　Gson可以把Bean对象->转换为JSON对象数据

　　　　　Gson可以把集合->转换为JSON数组数据

　　　　 ...........　

首先要在app/build.gradle配置文件中，导入，Gson支持包

// Gson支持包的导入
implementation ''com.google.code.gson:gson:2.6.2''

需要解析的JSON数据：

/data/data/liudeli.mynetwork01/files/pottingJSON1

{
    "name":"李四",
    "age":99,
    "hobby":"爱好是练习截拳道"
}

/data/data/liudeli.mynetwork01/files/pottingJSONArray1

[
    {
        "name":"君君",
        "age":89,
        "sex":"男"
    },
    {
        "name":"小君",
        "age":99,
        "sex":"女"
    },
    {
        "name":"大君",
        "age":88,
        "sex":"男"
    }
]

定义一个Bean
定义的name/age/hobby 必须要和JSON数据里面的一模一样

package liudeli.mynetwork01.entity;

/**
 * 定义一个Bean
 * 定义的name/age/hobby 必须要和JSON数据里面的一模一样
 * {
 *     "name":"李四",
 *     "age":99,
 *     "hobby":"爱好是练习截拳道"
 * }
 */
public class Student2 {

    private String name;
    private int age;
    private String hobby;

    public Student2(String name, int age, String hobby) {
        this.name = name;
        this.age = age;
        this.hobby = hobby;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name=''" + name + ''\'''' +
                ", age=" + age +
                ", hobby=''" + hobby + ''\'''' +
                ''}'';
    }
}

定义的name/age/sex 必须要和JSON数据里面的一模一样

package liudeli.mynetwork01.entity;

/**
 * 定义一个Bean
 * 定义的name/age/sex 必须要和JSON数据里面的一模一样
 *
 * [
 *     {
 *         "name":"君君",
 *         "age":89,
 *         "sex":"男"
 *     },
 *     {
 *         "name":"小君",
 *         "age":99,
 *         "sex":"女"
 *     },
 *     {
 *         "name":"大君",
 *         "age":88,
 *         "sex":"男"
 *     }
 * ]
 */
public class Student {

    private String name;
    private int age;
    private String sex;

    public Student(String name, int age, String sex) {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name=''" + name + ''\'''' +
                ", age=" + age +
                ", sex=''" + sex + ''\'''' +
                ''}'';
    }
}

GsonAnalyzeJSONActivity.java

package liudeli.mynetwork01;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.List;

import liudeli.mynetwork01.entity.Student;
import liudeli.mynetwork01.entity.Student2;

public class GsonAnalyzeJSONActivity extends Activity {

    private final String TAG = GsonAnalyzeJSONActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_gson_analyze);
    }

    /**
     * Gson解析JSON对象
     * {
     *     "name":"李四",
     *     "age":99,
     *     "hobby":"爱好是练习截拳道"
     * }
     */
    public void gonsAnalyzeJSONObject(View view) {
       String jsonData = readFile("pottingJSON1");
       // Log.d(TAG, "jsonData:" + jsonData);

       Gson gson = new Gson();
       Student2 student2 = gson.fromJson(jsonData, Student2.class);
       Log.d(TAG, "gonsAnalyzeJSONObject 解析后的结果:" + student2.toString());
    }

    /**
     * Gson解析JSON数组
     * [
     *     {
     *         "name":"君君",
     *         "age":89,
     *         "sex":"男"
     *     },
     *     {
     *         "name":"小君",
     *         "age":99,
     *         "sex":"女"
     *     },
     *     {
     *         "name":"大君",
     *         "age":88,
     *         "sex":"男"
     *     }
     * ]
     * @param view
     */
    public void gonsAnalyzeJSONArray(View view) {
        String jsonData = readFile("pottingJSONArray1");
        // Log.d(TAG, "jsonData:" + jsonData);

        Gson gson = new Gson();

        /**
         * TypeToken<List<需要映射的Bean对象>>(){}.getType()
         */
        List<Student> list = gson.fromJson(jsonData, new TypeToken<List<Student>>(){}.getType()); // 参数二：需要指定类型，类型来决定解析的集合

        for (Student student: list) {
            Log.d(TAG, "gonsAnalyzeJSONArray 解析后的结果:" + student.toString());
        }

    }

    /**
     * 读取文件里面的字符串
     * @param fileName
     * @return
     */
    private String readFile(String fileName) {
        String result = null;
        try {
            InputStream inputStream = openFileInput(fileName);

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            byte[] bytes = new byte[inputStream.available()];

            inputStream.read(bytes);

            baos.write(bytes, 0,bytes.length);

            result = new String(baos.toByteArray());

            baos.close();
            inputStream.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
}

activity_gson_analyze.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Gson解析JSON对象"
        android:onClick="gonsAnalyzeJSONObject"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Gson解析JSON数组"
        android:onClick="gonsAnalyzeJSONArray"
        />

</LinearLayout>

日志的打印：

使用Gson解析，JSON对象数据：

12-23 23:00:52.108 9729-9729/liudeli.mynetwork01 D/GsonAnalyzeJSONActivity: gonsAnalyzeJSONObject 解析后的结果:Student{name=''李四'', age=99, hobby=''爱好是练习截拳道''}

使用Gson解析，JSON数组数据：

12-23 23:00:53.199 9729-9729/liudeli.mynetwork01 D/GsonAnalyzeJSONActivity: gonsAnalyzeJSONArray 解析后的结果:Student{name=''君君'', age=89, sex=''男''}
12-23 23:00:53.199 9729-9729/liudeli.mynetwork01 D/GsonAnalyzeJSONActivity: gonsAnalyzeJSONArray 解析后的结果:Student{name=''小君'', age=99, sex=''女''}
12-23 23:00:53.199 9729-9729/liudeli.mynetwork01 D/GsonAnalyzeJSONActivity: gonsAnalyzeJSONArray 解析后的结果:Student{name=''大君'', age=88, sex=''男''}

Android-解析JSON数据（JSON对象/JSON数组）

在上一篇博客中，Android-封装JSON数据（JSON对象/JSON数组），讲解到Android真实开发中更多的是去解析JSON数据（JSON对象/JSON数组）

封装JSON的数据是在服务器端进行封装了，Android更多的工作是解析（JSON对象/JSON数组），所以Android开发JSON数据的解析非常重要

JSON数据，是存储在文件里面：

/data/data/liudeli.mynetwork01/files/pottingJSON1

{
    "name":"李四",
    "age":99,
    "hobby":"爱好是练习截拳道"
}

/data/data/liudeli.mynetwork01/files/pottingJSON2

{
    "student":{
        "name":"李四",
        "age":99,
        "hobby":"爱好是练习截拳道"
    }
}

/data/data/liudeli.mynetwork01/files/pottingJSON3

{
    "student":{
        "name":"李四",
        "age":99,
        "hobby":"爱好是练习截拳道",
        "dog":{
            "name":"阿黄",
            "age":77,
            "sex":"母"
        }
    }
}

/data/data/liudeli.mynetwork01/files/pottingJSONArray1

[
    {
        "name":"君君",
        "age":89,
        "sex":"男"
    },
    {
        "name":"小君",
        "age":99,
        "sex":"女"
    },
    {
        "name":"大君",
        "age":88,
        "sex":"男"
    }
]

/data/data/liudeli.mynetwork01/files/pottingJSONArray2

{
    "person":[
        {
            "name":"君君",
            "age":89,
            "sex":"男"
        },
        {
            "name":"小君",
            "age":99,
            "sex":"女"
        },
        {
            "name":"大君",
            "age":88,
            "sex":"男"
        }
    ]
}

为什么要使用jsonObject.optString，不使用jsonObject.getString
因为jsonObject.optString获取null不会报错

看着JSON数据，一步一步的解析就好了，当明白JSON数据格式后，解析是非常容易的：

AnalyzeJSONActivity.java

package liudeli.mynetwork01;

import android.app.Activity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.InputStream;

public class AnalyzeJSONActivity extends Activity {

    private final String TAG = AnalyzeJSONActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_analyze_json);
    }

    /**
     * 解析JSON对象
     * {
     *     "name":"李四",
     *     "age":99,
     *     "hobby":"爱好是练习截拳道"
     * }
     * @param view
     */
    public void analyzeJSON1(View view) {

        String result =  readFile("pottingJSON1");
        // Log.d(TAG, "result:" + result);

        try{
           JSONObject jsonObject = new JSONObject(result);
            /**
             * 为什么要使用jsonObject.optString， 不使用jsonObject.getString
             * 因为jsonObject.optString获取null不会报错
             */
           String name = jsonObject.optString("name", null);
           int age = jsonObject.optInt("age", 0);
           String hobby = jsonObject.optString("hobby", null);

            // 日志打印结果：
           Log.d(TAG, "analyzeJSON1解析的结果：name:" + name + " age:" + age + " hobby:" + hobby);

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

    /**
     * 解析JSON对象-带Key
     * {
     *     "student":{
     *         "name":"李四",
     *         "age":99,
     *         "hobby":"爱好是练习截拳道"
     *     }
     * }
     * @param view
     */
    public void analyzeJSON2(View view) {
        String result =  readFile("pottingJSON2");
        // Log.d(TAG, "result:" + result);

        try{
            // 整个最大的JSON对象
            JSONObject jsonObjectALL = new JSONObject(result);
            /**
             * 为什么要使用jsonObject.optString， 不使用jsonObject.getString
             * 因为jsonObject.optString获取null不会报错
             */
            String student = jsonObjectALL.optString("student", null);

            if (!TextUtils.isEmpty(student)) {
                JSONObject jsonObject = new JSONObject(student);
                String name = jsonObject.optString("name", null);
                int age = jsonObject.optInt("age", 0);
                String hobby = jsonObject.optString("hobby", null);

                // 日志打印结果：
                Log.d(TAG, "analyzeJSON2解析的结果：name:" + name + " age:" + age + " hobby:" + hobby);
            }

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

    /**
     * 解析JSON对象-嵌套对象
     * {
     *     "student":{
     *         "name":"李四",
     *         "age":99,
     *         "hobby":"爱好是练习截拳道",
     *         "dog":{
     *             "name":"阿黄",
     *             "age":77,
     *             "sex":"母"
     *         }
     *     }
     * }
     * @param view
     */
    public void analyzeJSON3(View view) {
        String result =  readFile("pottingJSON3");
        // Log.d(TAG, "result:" + result);

        try{
            // 整个最大的JSON对象
            JSONObject jsonObjectALL = new JSONObject(result);
            /**
             * 为什么要使用jsonObject.optString， 不使用jsonObject.getString
             * 因为jsonObject.optString获取null不会报错
             */
            String student = jsonObjectALL.optString("student", null);

            if (!TextUtils.isEmpty(student)) {
                JSONObject jsonObject = new JSONObject(student);
                String name = jsonObject.optString("name", null);
                int age = jsonObject.optInt("age", 0);
                String hobby = jsonObject.optString("hobby", null);

                // 以下是dog JSON 对象相关的解析

                String dogStr = jsonObject.optString("dog", null);
                // 定义dog的JSON对象
                JSONObject dogJSONObject = new JSONObject(dogStr);
                String dogName = dogJSONObject.optString("name", null);
                int dogAge = dogJSONObject.optInt("age", 0);
                String dogSex = dogJSONObject.optString("sex", null);

                // 日志打印结果：
                Log.d(TAG, "analyzeJSON3解析的结果：name:" + name + " age:" + age + " hobby:" + hobby + "\n"
                                 + "dogName:" + dogName + " dogAge:" + dogAge + " dogSex:" + dogSex);
            }

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

    /**
     * 解析JSON数组
     * [
     *     {
     *         "name":"君君",
     *         "age":89,
     *         "sex":"男"
     *     },
     *     {
     *         "name":"小君",
     *         "age":99,
     *         "sex":"女"
     *     },
     *     {
     *         "name":"大君",
     *         "age":88,
     *         "sex":"男"
     *     }
     * ]
     * @param view
     */
    public void analyzeJSONArray1(View view) {
        String result =  readFile("pottingJSONArray1");
        // Log.d(TAG, "result:" + result);

        try{
            // 整个最大的JSON数组
            JSONArray jsonArray = new JSONArray(result);
            Log.d(TAG, "analyzeJSONArray1 jsonArray:" + jsonArray);
            // [{"name":"君君","age":89,"sex":"男"},{"name":"小君","age":99,"sex":"女"},{"name":"大君","age":88,"sex":"男"}]

            for (int i = 0; i < jsonArray.length(); i++) {
                // JSON数组里面的具体-JSON对象
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                String name = jsonObject.optString("name", null);
                int age = jsonObject.optInt("age", 0);
                String sex = jsonObject.optString("sex", null);

                // 日志打印结果：
                Log.d(TAG, "analyzeJSONArray1 解析的结果：name" + name + " age:" + age + " sex:" + sex);
            }

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

    /**
     * 解析JSON数组-带Key
     * {
     *     "person":[
     *         {
     *             "name":"君君",
     *             "age":89,
     *             "sex":"男"
     *         },
     *         {
     *             "name":"小君",
     *             "age":99,
     *             "sex":"女"
     *         },
     *         {
     *             "name":"大君",
     *             "age":88,
     *             "sex":"男"
     *         }
     *     ]
     * }
     * @param view
     */
    public void analyzeJSONArray2(View view) {
        String result =  readFile("pottingJSONArray2");
        // Log.d(TAG, "result:" + result);

        try{
            /**
             * JSON数组在牛逼，一旦有了 key person 这样的标记，就必须先是个 JSON对象
             * 最外层的JSON对象，最大的哪个 { ... }
             */
            JSONObject jsonObjectALL = new JSONObject(result);

            // 通过标识(person)，获取JSON数组
            JSONArray jsonArray = jsonObjectALL.getJSONArray("person");

            Log.d(TAG, "analyzeJSONArray1 jsonArray:" + jsonArray);
            // [{"name":"君君","age":89,"sex":"男"},{"name":"小君","age":99,"sex":"女"},{"name":"大君","age":88,"sex":"男"}]

            for (int i = 0; i < jsonArray.length(); i++) {
                // JSON数组里面的具体-JSON对象
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                String name = jsonObject.optString("name", null);
                int age = jsonObject.optInt("age", 0);
                String sex = jsonObject.optString("sex", null);

                // 日志打印结果：
                Log.d(TAG, "analyzeJSONArray2 解析的结果：name" + name + " age:" + age + " sex:" + sex);
            }

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

    /**
     * 读取文件里面的字符串
     * @param fileName
     * @return
     */
    private String readFile(String fileName) {
        String result = null;
        try {
            InputStream inputStream = openFileInput(fileName);

            byte[] bytes = new byte[inputStream.available()];
            inputStream.read(bytes);
            result = new String(bytes);

            inputStream.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 定义一个Bean
     */
    /*class Student {
        private String name;
        private int age;
        private String hobby;

        public Student(String name, int age, String hobby) {
            this.name = name;
            this.age = age;
            this.hobby = hobby;
        }

        @Override
        public String toString() {
            return "Student{" +
                    "name=''" + name + ''\'''' +
                    ", age=" + age +
                    ", hobby=''" + hobby + ''\'''' +
                    ''}'';
        }
    }*/
}

activity_analyze_json.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="解析JSON对象"
            android:onClick="analyzeJSON1"
            android:layout_weight="1"
            />


        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="解析JSON对象-带Key"
            android:onClick="analyzeJSON2"
            android:layout_weight="1"
            />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="解析JSON对象-嵌套对象"
            android:onClick="analyzeJSON3"
            android:layout_weight="1"
            />


    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="解析JSON数组"
            android:onClick="analyzeJSONArray1"
            android:layout_weight="1"
            />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="解析JSON数组-带Key"
            android:onClick="analyzeJSONArray2"
            android:layout_weight="1"
            />

    </LinearLayout>

</LinearLayout>

所有解析JSON的Log打印：

analyzeJSON1

12-23 21:46:44.127 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSON1解析的结果：name:李四 age:99 hobby:爱好是练习截拳道

analyzeJSON2

12-23 21:46:59.161 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSON2解析的结果：name:李四 age:99 hobby:爱好是练习截拳道

analyzeJSON3

12-23 21:47:12.240 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSON3解析的结果：name:李四 age:99 hobby:爱好是练习截拳道
dogName:阿黄 dogAge:77 dogSex:母

analyzeJSONArray1

12-23 21:47:35.108 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray1 解析的结果：name君君 age:89 sex:男
12-23 21:47:35.108 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray1 解析的结果：name小君 age:99 sex:女
12-23 21:47:35.108 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray1 解析的结果：name大君 age:88 sex:男

analyzeJSONArray2

12-23 21:47:55.457 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray2 解析的结果：name君君 age:89 sex:男
12-23 21:47:55.457 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray2 解析的结果：name小君 age:99 sex:女
12-23 21:47:55.457 8204-8204/liudeli.mynetwork01 D/AnalyzeJSONActivity: analyzeJSONArray2 解析的结果：name大君 age:88 sex:男

java – Android解析Json数组的字符串

如何在 Android中解析一个Json数组的字符串并将其保存在java字符串数组(如：xy [])？

我的Json要被解析：

[
  {
    "streets": [ "street1","street2","street3",... ],}
 ]

后来在我的代码中,我想用这个数组填充我的布局中的微调项.
我尝试的一切都只能在旋转器中列出一个街道项目.

解决方法

解析

try {

   JSONArray jr = new JSONArray("Your json string");
   JSONObject jb = (JSONObject)jr.getJSONObject(0);
   JSONArray st = jb.getJSONArray("streets");
   for(int i=0;i<st.length();i++)
       {
      String street = st.getString(i);
      Log.i("..........",""+street);
      // loop and add it to array or arraylist
        }
}catch(Exception e)
{
        e.printstacktrace();
}

一旦你解析并添加到数组.使用它来填充您的微调.

[表示json数组节点

{表示json对象节点

java – 如何在Android中解析此JSON？

我想拉出用户块. JSON结果将始终更改,有时将返回4个用户,有时10个等.

 {
      "results": [
        {
          "user": {
            "avatar_url_thumb": "http://avatars.stocktwits.com/production/9998/thumb-1270014645.png?1270014645",
            "avatar_url_medium": "http://avatars.stocktwits.com/production/9998/medium-1270014645.png?1270014645",
            "created_at": "2010-03-15T05:44:51Z",
            "following_count": 14,
            "updated_at": "2010-08-30T18:22:15Z",
            "id": 9998,
            "updates_count": 31,
            "avatar_url_large": "http://avatars.stocktwits.com/production/9998/large-1270014645.png?1270014645",
            "investor_relations": false,
            "last_name": "Reporter",
            "followers_count": 25,
            "recommended": false,
            "bio": "Apple News & AAPL Stock Analysis, visit Apple Digest blog link above",
            "login": "AppleReporter",
            "first_name": "Apple"
          }
        },
        {
          "user": {
            "avatar_url_thumb": "http://api.stocktwits.com/images/default_avatar_thumb.jpg",
            "avatar_url_medium": "http://api.stocktwits.com/images/default_avatar_medium.jpg",
            "created_at": "2010-04-14T01:02:05Z",
            "following_count": 0,
            "updated_at": "2010-08-30T18:29:56Z",
            "id": 12924,
            "updates_count": 1,
            "avatar_url_large": "http://api.stocktwits.com/images/default_avatar_large.jpg",
            "investor_relations": false,
            "last_name": "Shareholder",
            "followers_count": 0,
            "recommended": false,
            "bio": null,
            "login": "Imurphit",
            "first_name": "Apple"
          }
        },
        {
          "user": {
            "avatar_url_thumb": "http://api.stocktwits.com/images/default_avatar_thumb.jpg",
            "avatar_url_medium": "http://api.stocktwits.com/images/default_avatar_medium.jpg",
            "created_at": "2010-04-17T20:52:09Z",
            "following_count": 0,
            "updated_at": "2010-08-30T18:31:23Z",
            "id": 13234,
            "updates_count": 0,
            "avatar_url_large": "http://api.stocktwits.com/images/default_avatar_large.jpg",
            "investor_relations": false,
            "last_name": "Apple",
            "followers_count": 0,
            "recommended": false,
            "bio": null,
            "login": "apple11",
            "first_name": "John"
          }
        },
        {
          "user": {
            "avatar_url_thumb": "http://api.stocktwits.com/images/default_avatar_thumb.jpg",
            "avatar_url_medium": "http://api.stocktwits.com/images/default_avatar_medium.jpg",
            "created_at": "2010-07-12T19:04:51Z",
            "following_count": 0,
            "updated_at": "2010-08-30T20:12:15Z",
            "id": 18691,
            "updates_count": 0,
            "avatar_url_large": "http://api.stocktwits.com/images/default_avatar_large.jpg",
            "investor_relations": false,
            "last_name": "Smith",
            "followers_count": 0,
            "recommended": false,
            "bio": null,
            "login": "apple",
            "first_name": "Jacob"
          }
        },
        {
          "user": {
            "avatar_url_thumb": "http://api.stocktwits.com/images/default_avatar_thumb.jpg",
            "avatar_url_medium": "http://api.stocktwits.com/images/default_avatar_medium.jpg",
            "created_at": "2010-07-13T17:06:27Z",
            "following_count": 0,
            "updated_at": "2010-08-30T20:12:30Z",
            "id": 18808,
            "updates_count": 3,
            "avatar_url_large": "http://api.stocktwits.com/images/default_avatar_large.jpg",
            "investor_relations": false,
            "last_name": "apple",
            "followers_count": 0,
            "recommended": false,
            "bio": null,
            "login": "applejames",
            "first_name": "James"
          }
        }
      ],
      "page": 1,
      "symbol": false,
      "per_page": 20,
      "response": {
        "status": 200
      },
      "total_pages": 1,
      "total_entries": 6
    }

解决方法:

使用JSONObject

 // Get some JSON from wherever
 String json = getJSONFromServer();

 // Parse the JSON response into an object
 JSONObject object = new JSONObject(json);

 // Get the results array
 JSONArray users = object.getJSONArray("results");
 for(int i = 0; i < users.length(); i++) {
     // Each element in the results array is a JSONObject with a single
     // property "user" which is a JSONObject that contains the user data
     JSONObject user = users.getJSONObject(i).getJSONObject("user");

     // Do something with the user
     String firstName = user.getString("first_name");
 }

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