在AndroidManifest.xml中配置权限：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.li.json"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".MyJSONDemo"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
在main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:gravity="center_horizontal"
android:layout_marginTop="8dp"
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
在MyJSONDemo.java程序中
package com.li.json;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class MyJSONDemo extends Activity {
private TextView text = null ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.text = (TextView) super.findViewById(R.id.text) ;
String str = "[{\"id\":1,\"name\":\"李叶文\",\"age\":30},"
+ "{\"id\":2,\"name\":\"HCXY\",\"age\":10}]";
StringBuffer buf = new StringBuffer() ;
try {
List<Map<String,Object>> all = this.parseJson(str) ;
Iterator<Map<String,Object>> iter = all.iterator() ;
while(iter.hasNext()){
Map<String,Object> map = iter.next() ;
buf.append("ID：" + map.get("id") + "，姓名：" + map.get("name")
+ "，年龄：" + map.get("age") + "\n");
}
} catch (Exception e) {
e.printStackTrace();
}
this.text.setText(buf) ;
}
private List<Map<String, Object>> parseJson(String data) throws Exception {
List<Map<String, Object>> all = new ArrayList<Map<String, Object>>();
JSONArray jsonArr = new JSONArray(data); // 是数组
for (int x = 0; x < jsonArr.length(); x++) {
Map<String, Object> map = new HashMap<String, Object>();
JSONObject jsonObj = jsonArr.getJSONObject(x);
map.put("id", jsonObj.getInt("id"));
map.put("name", jsonObj.getString("name"));
map.put("age", jsonObj.getInt("age"));
all.add(map);
}
return all;
}
}