package com.itheima.httpclient;

import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
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 com.itheima.httpclient.utils.Utils;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

    Handler handler = new Handler(){
        @Override
        public void handleMessage(android.os.Message msg) {
            Toast.makeText(MainActivity.this, (String)msg.obj, 0).show();//子线程是不能执行Toast.makeText，
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void get(View v){
        EditText et_name = (EditText) findViewById(R.id.et_name);
        EditText et_pass = (EditText) findViewById(R.id.et_pass);
        final String name = et_name.getText().toString();
        final String pass = et_pass.getText().toString();
        Thread t = new Thread(){
            @Override
            public void run() {//URLEncoder.encode(name)是仿浏览器的中文编码，
                String path = "http://192.168.13.13/Web/servlet/CheckLogin?name=" + URLEncoder.encode(name) + "&pass=" + pass;
                //使用httpClient框架做get方式提交
                //1.创建HttpClient对象，用于执行get请求
                HttpClient hc = new DefaultHttpClient();
                //2.创建httpGet对象，构造方法的参数就是网址
                HttpGet hg = new HttpGet(path);//一个get请求
                //3.使用客户端对象，把get请求对象发送出去
                try {
                    HttpResponse hr = hc.execute(hg);
                    //拿到响应头中的状态行
                    StatusLine sl = hr.getStatusLine();
                    if(sl.getStatusCode() == 200){
                        //拿到响应头的实体
                        HttpEntity he = hr.getEntity();
                        //拿到实体中的内容，其实就是服务器返回的输入流
                        InputStream is = he.getContent();
                        String text = Utils.getTextFromStream(is);
                        
                        //发送消息，让主线程刷新ui显示text
                        Message msg = handler.obtainMessage();
                        msg.obj = text;
                        handler.sendMessage(msg);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        t.start();
    }
    
    public void post(View v){
        EditText et_name = (EditText) findViewById(R.id.et_name);
        EditText et_pass = (EditText) findViewById(R.id.et_pass);
        final String name = et_name.getText().toString();
        final String pass = et_pass.getText().toString();
        Thread t = new Thread(){
            @Override
            public void run() {
                String path = "http://192.168.13.13/Web/servlet/CheckLogin";
                //1.创建客户端对象
                HttpClient hc = new DefaultHttpClient();
                //2.创建post请求对象
                HttpPost hp = new HttpPost(path);
                
                //封装form表单提交的数据
                BasicNameValuePair bnvp = new BasicNameValuePair("name", name);
                BasicNameValuePair bnvp2 = new BasicNameValuePair("pass", pass);
                List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
                //把BasicNameValuePair放入集合中
                parameters.add(bnvp);
                parameters.add(bnvp2);
                
                try {
                    //要提交的数据都已经在集合中了，把集合传给实体对象
                    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters, "utf-8");
                    //设置post请求对象的实体，其实就是把要提交的数据封装至post请求的输出流中
                    hp.setEntity(entity);
                    //3.使用客户端发送post请求
                    HttpResponse hr = hc.execute(hp);
                    if(hr.getStatusLine().getStatusCode() == 200){
                        InputStream is = hr.getEntity().getContent();
                        String text = Utils.getTextFromStream(is);
                        //发送消息，让主线程刷新ui显示text
                        Message msg = handler.obtainMessage();
                        msg.obj = text;
                        handler.sendMessage(msg);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        t.start();
    }
}

package com.itheima.httpclient.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Utils {

    public static String getTextFromStream(InputStream is){
        
        byte[] b = new byte[1024];
        int len = 0;//每次read的长度
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try {
            while((len = is.read(b)) != -1){
                bos.write(b, 0, len);
            }
            String text = new String(bos.toByteArray());
            bos.close();
            return text;
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
}