小记：获取post和get请求。

package com.lixu.httpget_post;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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 android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

    EditText et1;
    EditText et2;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et1 = (EditText) findViewById(R.id.et1);
        et2 = (EditText) findViewById(R.id.et2);
        Button bt1 = (Button) findViewById(R.id.btn1);
        Button bt2 = (Button) findViewById(R.id.btn2);
        bt1.setOnClickListener(this);
        bt2.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.btn1:
            new Thread(new Runnable() {

                @Override
                public void run() {
                    // 1.定义一个客户端 你可以理解为是一个浏览器
                    HttpClient client = new DefaultHttpClient();
                    // 2. 定义一个get请求，并封装好他的参数
                    String data = "username" + et1.getText().toString() + "password" + et2.getText().toString();
                    HttpGet get = new HttpGet("http://10.0.2.2:8080/test/lianjie?" + data);
                    // 3. 用定义好的浏览器来执行一个地址
                    try {
                        HttpResponse response = client.execute(get);
                        // 4. 获取状态码，看返回回来的是否是200
                        final int statuscode = response.getStatusLine().getStatusCode();
                        if (statuscode == 200) {
                            InputStream in = response.getEntity().getContent();
                            final String content = getStringFromStream(in);
                            runOnUiThread(new Runnable() {

                                public void run() {
                                    Toast.makeText(MainActivity.this, "状态为：" + statuscode + "内容是：" + content, 0).show();
                                }
                            });
                        }

                    } catch (ClientProtocolException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }
            }).start();
            break;
        case R.id.btn2:
            new Thread(new Runnable() {
                public void run() {
                    HttpClient client = new DefaultHttpClient();
                    // 定义一个post请求的对象
                    HttpPost post = new HttpPost("http://10.0.2.2:8080/test/lianjie");
                    List<NameValuePair> parameters = new ArrayList<NameValuePair>();
                    NameValuePair name = new BasicNameValuePair("username", et1.getText().toString());
                    NameValuePair pwd = new BasicNameValuePair("pasword", et2.getText().toString());
                    parameters.add(name);
                    parameters.add(pwd);

                    UrlEncodedFormEntity entity;
                    try {
                        entity = new UrlEncodedFormEntity(parameters, "UTF-8");
                        post.setEntity(entity);
                        HttpResponse response = client.execute(post);
                        final int statuscode = response.getStatusLine().getStatusCode();// 获取状态码
                        if (statuscode == 200) {
                            InputStream in = response.getEntity().getContent();
                            final String content=getStringFromStream(in);
                            runOnUiThread(new Runnable() {
                                
                                public void run() {
                                    Toast.makeText(MainActivity.this, "状态为："+statuscode+"内容是："+content, 0).show();
                                }
                            });
                        }

                    } catch (UnsupportedEncodingException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (ClientProtocolException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }

            }).start();
            break;

        default:
            break;
        }

    }

    public String getStringFromStream(InputStream in) {
        byte[] buffer = new byte[1024];
        ByteArrayOutputStream bytearray = new ByteArrayOutputStream();
        int len = 0;
        try {
            if ((len = in.read(buffer, 0, 1024)) != -1) {
                bytearray.write(buffer);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        String content = bytearray.toString();
        return content;
    }

}