Android Json数据的解析 java数据解析

0.xml布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="cn.ldc456sina.myjson.MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <EditText
                android:id="@+id/show"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="#000000"
                android:enabled="false"
                android:gravity="center"
                android:hint="@string/ldc_str"
                android:textColor="#990000" />

            <Button
                android:id="@+id/btn1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/show"
                android:layout_margin="3dp"
                android:text="json数据解析"
                android:textSize="20sp"
                android:textStyle="bold" />

            <Button
                android:id="@+id/btn2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/btn1"
                android:layout_margin="3dp"
                android:text="json数组解析"
                android:textSize="20sp"
                android:textStyle="bold" />

            <Button
                android:id="@+id/btn3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/btn2"
                android:layout_margin="3dp"
                android:text="json数组数据解析"
                android:textSize="20sp"
                android:textStyle="bold" />
        </LinearLayout>
    </ScrollView>


</RelativeLayout>

 

1.布局

2.

3.

4.

5json数据解析

/**
 * 简单的json数据
 *
 * @return
 * @throws JSONException
 */

public String createJson1() throws JSONException {
    String result = "";
    JSONObject create_js = new JSONObject();
    create_js.put("name", "DigitalKing");
    create_js.put("age", 14);
    create_js.put("address", "中国").put("province", "武汉");
    result = create_js.toString();
    return result;
}

 

/**
 * json数组解析
 * 创建一个学生数组
 *
 * @return
 */

public String createjson2() throws JSONException {
    String result = "";
    JSONObject create_json2 = new JSONObject();
    JSONArray jsonArray = new JSONArray();
    jsonArray.put(0, "数字帝国");
    jsonArray.put(1, "23");
    jsonArray.put(2, "中国湖北省武汉市");
    jsonArray.put(3, "热干面");
    jsonArray.put(4, "樱花");
    create_json2.put("Student", jsonArray);
    result = create_json2.toString();
    return result;
}

 

/**
 * 数组数据解析
 * 数组数据混合解析
 *
 * @return
 */

public String createjson3() throws JSONException {
    String result = "";
    JSONObject create_json3 = new JSONObject();
    create_json3.put("name", "@小小古怪");
    create_json3.put("age", 222);
    create_json3.put("school", "世界一流/家里蹲航天理工大学");
    JSONArray address = new JSONArray();
    address.put("中国").put("湖北省").put("武汉市").put("江夏区");
    create_json3.put("address", address);
    result = create_json3.toString();
    return result;
}

 

/**
 * 解析简单的json数据
 */

public void fun1() {
    //解析数据
    try {
        String resule_str = createJson1();
        JSONObject js = new JSONObject(resule_str);
        String name = js.getString("name");
        int age = js.getInt("age");
        String address = js.getString("address");
        String province = js.getString("province");
        String result = resule_str + "\n\n\n ------------------------------\n 姓 名:" + name + "   年  龄:" + age + "\n  地  址:" + address + " " + province + "\n------------------------------\n";
        show.setText(result);
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

 

/**
 * 解析json数组数据
 */

public void fun2() {
    try {
        String result = createjson2();
        String vals = "";
        JSONObject jsonObject = new JSONObject(result);
        JSONArray ja = jsonObject.getJSONArray("Student");
        int length = ja.length();
        for (int i = 0; i < length; i++) {
            vals += ja.getString(i) + "|\n";
        }
        show.setText(result + "\n\n ------------------------\n" + vals + "\n----------------------");
    } catch (JSONException ex_str) {
        ex_str.printStackTrace();
    }
}

 

//json数组数据解析

public void fun3() {
    try {
        String result = createjson3();
        String val_str = "";//获取数组的值
        JSONObject jsonObject = new JSONObject(result);
        String nameval = jsonObject.getString("name");
        int ageval = jsonObject.getInt("age");
        String schoolval = jsonObject.getString("school");
        JSONArray ja = jsonObject.getJSONArray("address");
        int length = ja.length();
        for (int i = 0; i < length; i++) {
            val_str += ja.get(i);
        }
        show.setText(result+"\n\n\n-----------------------------------\n" + "姓名 :" + nameval + "  年龄:" + ageval + "\n   学校:" + schoolval + "\n" + val_str + "\n--------------------------------------\n");
    } catch (JSONException ex_str) {
        ex_str.printStackTrace();
    }

}

 

fun1();//简答的json数据解析
fun2();//json数组解析
fun3();//json数据数组解析
设置监听事件
show = (TextView) findViewById(R.id.show);
btn1 = (Button) findViewById(R.id.btn1);
btn2 = (Button) findViewById(R.id.btn2);
btn3 = (Button) findViewById(R.id.btn3);
btn1.setOnClickListener(new LDC_());
btn2.setOnClickListener(new LDC_());
btn3.setOnClickListener(new LDC_());

在点击监听处理数
class LDC_ implements View.OnClickListener {

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn1:
                fun1();//简单的json解析
                break;
            case R.id.btn2:
                fun2();//简单的json数组解析
                break;
            case R.id.btn3:
                fun3();//数组数据解析
                break;
        }


    }
}

 

//结束