1.Android中解析json程序代码

1. Android程序解析json数据可以通过gson的方式，这种情况需要导入相应的jar包。测试代码如下：

@Override

  
protected
void onCreate(Bundle savedInstanceState) {

     
super.onCreate(savedInstanceState);

     
setContentView(R.layout.activity_main);

     
if (savedInstanceState ==
null) {

        
getSupportFragmentManager().beginTransaction()

               
.add(R.id.container,
new PlaceholderFragment()).commit();

     
}

     
//第一种方式：

     
String jsonString = "{\"id\":\"1378230362\",\"name\":\"360U1378230362\"}";

     
System.out.println(jsonString);

     
jsonString = "[" + jsonString +
"]";

     
try {

        
JsonReader reader = new JsonReader(new
StringReader(jsonString));

        
reader.beginArray();

        
while (reader.hasNext()) {

           
reader.beginObject();

           
while (reader.hasNext()) {

               
String tagName = reader.nextName();

               
if (tagName.equals("id"))
{

                  
Toast.makeText(this,
"id:" + reader.nextString(), 1000).show();

                  
System.out.println(reader.nextString());

               
} else
if (tagName.equals("name"))
{

  
                Toast.makeText(this,
"name:" + reader.nextString(), 1000).show();

               
   //System.out.println(reader.nextString());

               
}

           
}

           
reader.endObject();

        
}

        
reader.endArray();

     
} catch (Exception e) {

        
e.printStackTrace();

     
}

  
}

2
通过Android中的JSONObject的方式解析JSON数据

package com.example.jsontest2;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.widget.Toast;

public class MainActivity extends Activity {

        
@Override

        
protected void onCreate(Bundle savedInstanceState) {

                  
super.onCreate(savedInstanceState);

                  
setContentView(R.layout.activity_main);

                  
String jsonMessage = "{\"语文\":\"88\",\"数学\":\"78\",\"计算机\":\"99\"}";

                  
String value1 = null;

                  
try {

                           
// 将字符串转换成jsonObject对象

                           
JSONObject myJsonObject = new JSONObject(jsonMessage);

                           
// 获取对应的值

                           
value1 = myJsonObject.getString("数学");

                           
Toast.makeText(this, "value1:" + value1, 3000).show();

                  
} catch (JSONException e) {}

                  
System.out.println("value1=" + value1);

                  
// JSONArray

                  
jsonMessage = "[{'num':'成绩', '外语':88, '历史':65,
'地理':99, 'object':{'aaa':'1111','bbb':'2222','cccc':'3333'}},"

                                    
+ "{'num':'兴趣', '外语':28, '历史':45,
'地理':19, 'object':{'aaa':'11a11','bbb':'2222','cccc':'3333'}},"

                                    
+ "{'num':'爱好', '外语':48, '历史':62,
'地理':39, 'object':{'aaa':'11c11','bbb':'2222','cccc':'3333'}}]";

                  
JSONArray myJsonArray;

                  
try {

                           
myJsonArray = new JSONArray(jsonMessage);

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

        
                            // 获取每一个JsonObject对象

                                    
JSONObject myjObject = myJsonArray.getJSONObject(i);

                                    
// 获取每一个对象中的值

                                    
String numString = myjObject.getString("num");

                                    
int englishScore = myjObject.getInt("外语");

                                    
int historyScore = myjObject.getInt("历史");

                                    
int geographyScore = myjObject.getInt("地理");

                                    
// 获取数组中对象的对象

                                    
JSONObject myjObject2 = myjObject.getJSONObject("object");

                                    
String aaaString = myjObject2.getString("aaa");

                                    
System.out.println("aaaString=" + aaaString);

                                    
System.out.println("numString=" + numString);

                                    
System.out.println("englishScore=" + englishScore);

                                    
System.out.println("historyScore=" + historyScore);

                                    
System.out.println("geographyScore=" + geographyScore);

                           
}

                  
} catch (JSONException e) {

                  
}

        
}

        
@Override

        
public boolean onCreateOptionsMenu(Menu menu) {

                  
// Inflate the menu; this adds items to the action bar if it is present.

                  
getMenuInflater().inflate(R.menu.main, menu);

                  
return true;

        
}

}