Android发送GET和POST请求DEMO

public class GetPostUtil
{
	/**
	 * 向指定URL发送GET方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param params
	 *            请求参数，请求参数应该是name1=value1&name2=value2的形式。
	 * @return URL所代表远程资源的响应
	 */
	public static String sendGet(String url, String params)
	{
		String result = "";
		BufferedReader in = null;
		try
		{
			String urlName = url + "?" + params;
			URL realUrl = new URL(urlName);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
				"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
			// 建立实际的连接
			conn.connect();
			// 获取所有响应头字段
			Map<String, List<String>> map = conn.getHeaderFields();
			// 遍历所有的响应头字段
			for (String key : map.keySet())
			{
				System.out.println(key + "--->" + map.get(key));
			}
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
				new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null)
			{
				result += "\n" + line;
			}
		}
		catch (Exception e)
		{
			System.out.println("发送GET请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally
		{
			try
			{
				if (in != null)
				{
					in.close();
				}
			}
			catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定URL发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param params
	 *            请求参数，请求参数应该是name1=value1&name2=value2的形式。
	 * @return URL所代表远程资源的响应
	 */
	public static String sendPost(String url, String params)
	{
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try
		{
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
				"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(params);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
				new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null)
			{
				result += "\n" + line;
			}
		}
		catch (Exception e)
		{
			System.out.println("发送POST请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally
		{
			try
			{
				if (out != null)
				{
					out.close();
				}
				if (in != null)
				{
					in.close();
				}
			}
			catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
		return result;
	}
}

public class GetPostMain extends Activity
{
	Button get , post;
	EditText show;
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		get = (Button) findViewById(R.id.get);
		post = (Button) findViewById(R.id.post);
		show = (EditText)findViewById(R.id.show);
		//利用Handler更新UI
		final Handler h = new Handler(){
			@Override
			public void handleMessage(Message msg) {
				if(msg.what==0x123){
					show.setText(msg.obj.toString());
				}
			}
		};
		
		get.setOnClickListener(new OnClickListener()
		{
			@Override
			public void onClick(View v)
			{
				new Thread(new AccessNetwork("GET", "http://192.168.1.88:8080/abc/a.jsp", null, h)).start();
			}			
		});
		post.setOnClickListener(new OnClickListener()
		{
			@Override
			public void onClick(View v)
			{
				new Thread(new AccessNetwork("POST", "http://192.168.1.88:8080/abc/login.jsp", "name=crazyit.org&pass=leegang", h)).start();
			}			
		});	
	}
}
class AccessNetwork implements Runnable{
	private String op ;
	private String url;
	private String params;
	private Handler h;
	
	public AccessNetwork(String op, String url, String params,Handler h) {
		super();
		this.op = op;
		this.url = url;
		this.params = params;
		this.h = h;
	}

	@Override
	public void run() {
		Message m = new Message();
		m.what = 0x123;
		if(op.equals("GET")){
			Log.i("iiiiiii","发送GET请求");
			m.obj = GetPostUtil.sendGet(url, params);
			Log.i("iiiiiii",">>>>>>>>>>>>"+m.obj);
		}
		if(op.equals("POST")){
			Log.i("iiiiiii","发送POST请求");
			m.obj = GetPostUtil.sendPost(url, params);
			Log.i("gggggggg",">>>>>>>>>>>>"+m.obj);
		}
		h.sendMessage(m);
	}
}