使用httpclient框架分别用post，get方式提交

package com.example.httpclient;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class MyActivity extends Activity {
    private EditText et1;
    private EditText et2;
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what){
                case 1:
                    String result = (String) msg.obj;
                    Toast.makeText(MyActivity.this,result,Toast.LENGTH_SHORT).show();
                    break;
                case 2:
                    String o = (String) msg.obj;
                    Toast.makeText(MyActivity.this,o,Toast.LENGTH_SHORT).show();
                    break;
            }

        }
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        et1 = (EditText) findViewById(R.id.et1);
        et2 = (EditText) findViewById(R.id.et2);
        findViewById(R.id.get).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Thread thread = new Thread(){
                    @Override
                    public void run() {
                        String username = et1.getText().toString();
                        String password = et2.getText().toString();
                        String path = "http://192.168.21.1:8080/ok/servlet/Login?username="+username+"&password="+password;
                        //创建HttpClient对象
                        HttpClient httpClient = new DefaultHttpClient();
                        //创建get方法
                        HttpGet httpGet = new HttpGet(path);

                        try {
                            //使用客户端对象用get方式提交到服务器
                            HttpResponse httpResponse = httpClient.execute(httpGet);
                            //得到状态行，这里有响应码等信息
                            StatusLine statusLine = httpResponse.getStatusLine();
                            //得到响应码
                            if(statusLine.getStatusCode()==200){
                                //得到响应的实体，这里有输入输出流信息
                                HttpEntity httpEntity = httpResponse.getEntity();
                                InputStream inputStream = httpEntity.getContent();
                                String data = getDataFromIn(inputStream);
                                Message msg = handler.obtainMessage();
                                msg.what = 1;
                                msg.obj = data;
                                handler.sendMessage(msg);

                            }

                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                };
                thread.start();
            }
        });

        findViewById(R.id.post).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Thread thread = new Thread(){
                    @Override
                    public void run() {
                        String username = et1.getText().toString();
                        String password = et2.getText().toString();
                        String path = "http://192.168.21.1:8080/ok/servlet/Login";
                        //创建客户端对象
                        HttpClient httpClient = new DefaultHttpClient();
                        //创建post方法
                        HttpPost httpPost = new HttpPost(path);
                        //声明并实例化list存放basicNameValuePair
                        List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();
                        //把要提交的值放到namevaluepair中
                        BasicNameValuePair basicNameValuePair = new BasicNameValuePair("username",username);
                        BasicNameValuePair basicNameValuePair2 = new BasicNameValuePair("password",password);
                        list.add(basicNameValuePair);
                        list.add(basicNameValuePair2);
                        try {
                        //表单提交的实体这个方法需要两个参数一个是list<namevaluepair> 还有一个编码集
                        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list,"utf-8");
                        //设置实体
                        httpPost.setEntity(urlEncodedFormEntity);

                            //客户端对象使用post方式提交
                            HttpResponse httpResponse = httpClient.execute(httpPost);
                            StatusLine statusLine = httpResponse.getStatusLine();
                            if(statusLine.getStatusCode()==200){
                                HttpEntity httpEntity = httpResponse.getEntity();
                                InputStream in = httpEntity.getContent();
                                String ok =  getDataFromIn(in);
                                Message msg = handler.obtainMessage();
                                msg.what = 2;
                                msg.obj =ok;
                                handler.sendMessage(msg);
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                };
                thread.start();

            }
        });

    }
    private static String getDataFromIn(InputStream in){
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] b = new byte[1024];
        int len = 0;
        try {
            while ((len = in.read(b))!=-1){
                out.write(b,0,len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new String(out.toByteArray());
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >
    <EditText
            android:id="@+id/et1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入用户名"/>
    <EditText
            android:id="@+id/et2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入密码"/>
    <Button
            android:id="@+id/get"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="get"/>
    <Button
            android:id="@+id/post"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="post"
            />
</LinearLayout>