使用Apache HttpClient

package com.example.httpclienttest;

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; 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.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 org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils;

import android.annotation.SuppressLint; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.os.StrictMode; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast;

@SuppressLint("NewApi") public class MainActivity extends Activity { Button get; Button login; EditText response; HttpClient httpClient;

@Override
public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);
	StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());
	StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().detectLeakedClosableObjects().penaltyLog().penaltyDeath().build());
	// 建立DefaultHttpClient對象
	httpClient = new DefaultHttpClient();
	get = (Button) findViewById(R.id.get);
	login = (Button) findViewById(R.id.login);
	response = (EditText) findViewById(R.id.response);
	get.setOnClickListener(new OnClickListener() {
		@Override
		public void onClick(View v) {
			// 建立一個HttpClient對象
			HttpGet get = new HttpGet("http://192.168.1.101:8080/WebTest/secret.jsp");
			// 發送GET請求
			try {
				HttpResponse httpResponse = httpClient.execute(get);
				HttpEntity entity = httpResponse.getEntity();
				if (entity != null) {
					// 讀取服務器響應
					BufferedReader br = new BufferedReader(new InputStreamReader(entity.getContent()));
					String line = null;
					while ((line = br.readLine()) != null) {
						response.append(line + "\n");
					}
				}
			} catch (ClientProtocolException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	});
	login.setOnClickListener(new OnClickListener() {

		@Override
		public void onClick(View v) {
			final View loginDialog = getLayoutInflater().inflate(R.layout.login, null);
			new AlertDialog.Builder(MainActivity.this).setTitle("登陸系統").setView(loginDialog).setPositiveButton("login", new DialogInterface.OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					String name = ((EditText) loginDialog.findViewById(R.id.name)).getText().toString().trim();
					String pass = ((EditText) loginDialog.findViewById(R.id.pass)).getText().toString().trim();
					HttpPost post = new HttpPost("http://192.168.1.101:8080/WebTest/login.jsp");
					// 若是傳遞參數個數比較多能夠對傳遞的參數進行封裝
					List<NameValuePair> params = new ArrayList<NameValuePair>();
					params.add(new BasicNameValuePair("name", name));
					params.add(new BasicNameValuePair("pass", pass));
					try {
						// 設置請求參數
						post.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
						// 發送POST請求
						HttpResponse response = httpClient.execute(post);
						// 若是服務器成功返回響應
						if (response.getStatusLine().getStatusCode() == 200) {
							String msg = EntityUtils.toString(response.getEntity());
							Toast.makeText(getApplicationContext(), msg, 5000).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();
					}
				}
			}).setNegativeButton("取消", null).show();

		}
	});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
	getMenuInflater().inflate(R.menu.activity_main, menu);
	return true;
}

}