我想把下面的button监听事件里的代码封装成一个类随时调用，请问怎么封装，谢谢！

Android通过PHP连接MySQL(传值查询)(2012-05-28 18:19:01)转载▼标签：杂谈分类： Java
和 Android通过PHP连接MySQL(读取) 类似，界面不变，把 AndroidTestActivity.java 修改为：

select.php

<?php
mysql_connect("127.0.0.1","root","123456");
mysql_query("SET NAMES utf8");
mysql_select_db("test");

$sql=mysql_query("select * from teacher where id='".$_REQUEST['id']."' and name='".$_REQUEST['name']."'");
while($row=mysql_fetch_assoc($sql))
$output[]=$row;
print(json_encode($output));
mysql_close();
?>

package com.knight.android.MySQL;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.net.ParseException;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Android_MySQLActivity extends Activity {
JSONArray jArray;
String result = null;
InputStream is = null;
StringBuilder sb=null;
@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  Button b1 = (Button) findViewById(R.id.button1);
  b1.setOnClickListener(new Button.OnClickListener() {
  @Override
  public void onClick(View v) {
  // TODO Auto-generated method stub
  EditText tv = (EditText) findViewById(R.id.editView);
  ArrayList nameValuePairs = new ArrayList();
  nameValuePairs.add(new BasicNameValuePair("id","3"));
  nameValuePairs.add(new BasicNameValuePair("name","Guo"));
  //http post
  try{
  HttpClient httpclient = new DefaultHttpClient();
  HttpPost httppost = new HttpPost("http://175.186.54.10/select.php");
  httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
  HttpResponse response = httpclient.execute(httppost);
  HttpEntity entity = response.getEntity();
  is = entity.getContent();
  }catch(Exception e){
  Log.e("log_tag", "Error in http connection"+e.toString());
  }
  //convert response to string
  try{
  BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
  sb = new StringBuilder();
  sb.append(reader.readLine() + "\n");

  String line=null;
  while ((line = reader.readLine()) != null) {
  sb.append(line + "\n");
  }
  is.close();
  result=sb.toString();
  }catch(Exception e){
  Log.e("log_tag", "Error converting result "+e.toString());
  }
  //paring data
  int ct_id;
  String ct_name;
  try{
  jArray = new JSONArray(result);
  JSONObject json_data=null;

  for(int i=0;i<jArray.length();i++){
  json_data = jArray.getJSONObject(i);
  ct_id=json_data.getInt("id");
  ct_name=json_data.getString("name");
  tv.append(ct_name+" \n");
  }
  }catch(JSONException e1){
  // Toast.makeText(getBaseContext(), "No City Found" ,Toast.LENGTH_LONG).show();
  } catch (ParseException e1) {
  e1.printStackTrace();
  }
}
});
}

} --------------------编程问答--------------------



public class Android_MySQLActivity extends Activity {

JSONArray jArray;

String result = null;

InputStream is = null;

StringBuilder sb=null;

@Override

public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  Button b1 = (Button) findViewById(R.id.button1);



b1.setOnClickListener(new ButtonOnClickListener())；

}





private  class ButtonOnClickListener implements OnClickListener{

  @Override

  public void onClick(View v) {

  // TODO Auto-generated method stub

  EditText tv = (EditText) findViewById(R.id.editView);

  ArrayList nameValuePairs = new ArrayList();

  nameValuePairs.add(new BasicNameValuePair("id","3"));

  nameValuePairs.add(new BasicNameValuePair("name","Guo"));

  //http post

  try{

  HttpClient httpclient = new DefaultHttpClient();

  HttpPost httppost = new HttpPost("http://175.186.54.10/select.php");

  httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

  HttpResponse response = httpclient.execute(httppost);

  HttpEntity entity = response.getEntity();

  is = entity.getContent();

  }catch(Exception e){

  Log.e("log_tag", "Error in http connection"+e.toString());

  }

  //convert response to string

  try{

  BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);

  sb = new StringBuilder();

  sb.append(reader.readLine() + "\n");

   

  String line=null;

  while ((line = reader.readLine()) != null) {

  sb.append(line + "\n");

  }

  is.close();

  result=sb.toString();

  }catch(Exception e){

  Log.e("log_tag", "Error converting result "+e.toString());

  }

  //paring data

  int ct_id;

  String ct_name;

  try{

  jArray = new JSONArray(result);

  JSONObject json_data=null;

    

  for(int i=0;i<jArray.length();i++){

  json_data = jArray.getJSONObject(i);

  ct_id=json_data.getInt("id");

  ct_name=json_data.getString("name");

  tv.append(ct_name+" \n");

  }

  }catch(JSONException e1){

  // Toast.makeText(getBaseContext(), "No City Found" ,Toast.LENGTH_LONG).show();

  } catch (ParseException e1) {

  e1.printStackTrace();

  }

}

}

}

--------------------编程问答-------------------- 不用新建一个类吗？就直接这样？你这是封装么？
--------------------编程问答--------------------

引用 2 楼 fgsadsa 的回复:

不用新建一个类吗？就直接这样？你这是封装么？

写成这样了，还要我怎么说，不能自己把ButtonOnClickListener类分割出来？ --------------------编程问答-------------------- 分割出来的类找不到EditText，啊 --------------------编程问答-------------------- EditText tv = (EditText) findViewById(R.id.editView);
能写到oncreate函数里不？

补充：Java ,  Java相关