json解析+接口+网络请求+历史的今天

一、一个例子查询历史的今天发生的事件

  1.去聚合数据或者阿凡达 申请历史的今天的APPkey

  2.查看接口使用规范：

   


 3.根据获取的数据：请求结果为:{"total":18,"result":[{"year":2003,"month":4,"day":9,"title":"著名剧作家吴祖光逝世","type":1},{"year":2002,"month":4,"day":9,"title":"中国出版集团在京成立","type":1},{"year":1998,"month":4,"day":9,"title":"麦加朝觐惨剧","type":1},{"year":1997,"month":4,"day":9,"title":"吴作人逝世","type":1},{"year":1997,"month":4,"day":9,"title":"国际商会三十二届世界大会在沪举行","type":1}],"error_code":0,"reason":"Succes"}
   建立相应的javabean类。

二、代码部分

MainActivity.java类

<span style="font-size:18px;">package com.example.t22_09_jsontwo;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.google.gson.Gson;

public class MainActivity extends Activity {
private HttpResponse httpResponse = null;
private HttpEntity httpEntity = null;
private Button bt;
private EditText et1,et2;
private TextView showtv;
String sp;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt=(Button) findViewById(R.id.subb);
et1=(EditText) findViewById(R.id.yue);
et2=(EditText) findViewById(R.id.ri);
showtv=(TextView) findViewById(R.id.show);
sp=GetStringURL();
bt.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
new Thread(networkTask).start();

}
});
}

private String GetStringURL() {
// TODO Auto-generated method stub
String s="http://api.avatardata.cn/HistoryToday/LookUp?key=c43bdd056d034bf6be97e12993bf8362";
String p="&type=1&page=1&rows=5";
String n="&yue="+et1.getText().toString();
String m="&ri="+et2.getText().toString();
return s+n+m+p;
}

Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Bundle data = msg.getData();
String val = data.getString("value");
Log.i("mylog", "请求结果为:" + val);
Gson gson = new Gson();
Aaa w = gson.fromJson(val, Aaa.class);
List<Bbb> bs=new ArrayList<Bbb>();
bs=w.result;
StringBuffer temp=new StringBuffer();
for(int i=0;i<bs.size();i++)
{   String s=bs.get(i).year+"年"+bs.get(i).month+"月 "+bs.get(i).day+"日 "+" 事件："+bs.get(i).title+"\n";
temp.append(s);
//System.out.println(bs.get(i).month+"月 "+bs.get(i).day+"日 "+" 事件："+bs.get(i).title);
}
showtv.setText(temp);
}
};
Runnable networkTask = new Runnable() {
@Override
public void run() {
URI r=null;
sp=GetStringURL();
try {
r=new URI(sp);
} catch (URISyntaxException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

HttpGet httpGet = new HttpGet(r);
// 生成一个Http客户端对象
HttpClient httpClient = new DefaultHttpClient();
// 使用Http客户端发送请求对象
InputStream inputStream = null;
try {
// 返回给我们的响应
httpResponse = httpClient.execute(httpGet);
// 发给我们的响应的内容
httpEntity = httpResponse.getEntity();
inputStream = httpEntity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String result = "";
String line = "";
while ((line = reader.readLine()) != null) {
result = result + line;
}
Message msg = new Message();
Bundle data = new Bundle();
data.putString("value", result);
msg.setData(data);
handler.sendMessage(msg);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
inputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

};
}
</span>

两个bean类

<span style="font-size:18px;">package com.example.t22_09_jsontwo;

import java.util.List;

public class Aaa {
int total;
List<Bbb> result;
int error_code;
String reason;
}
</span>

<span style="font-size:18px;">package com.example.t22_09_jsontwo;

public class Bbb {
int year;
int month;
int day;
String title;
@Override
public String toString() {
// TODO Auto-generated method stub
return year+"-"+month+"-"+title;
}
}
</span>

布局文件

<span style="font-size:18px;"><?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" >
<EditText
android:id="@+id/yue"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入月份"
android:inputType="text"
/>
<EditText
android:id="@+id/ri"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入几号"
android:inputType="text"

/>
<Button
android:id="@+id/subb"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="获取数据" />
<TextView
android:id="@+id/show"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#FFA07A"
android:textSize="20sp"
android:layout_margin="10dp"
/>
</LinearLayout></span>

演示结果：





代码有点简单粗暴  嘻嘻