<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.getserverdata.MainActivity" >    <EditText        android:id="@+id/et_username"        android:hint="请输入用户名"        android:layout_width="fill_parent"        android:layout_height="wrap_content"         >    </EditText>    <EditText        android:id="@+id/et_password"        android:hint="请输入密码"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:ems="10"        android:inputType="textPassword" />    <Button        android:onClick="click"        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="登录" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.getserverdata"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="21" />    <uses-permission android:name="android.permission.INTERNET"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

package com.example.getserverdata.service;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import com.example.getserverdata.utils.StreamUtil;public class LoginService {        public static String loginByGet(String username,String password)    {                String path = "http://192.168.1.100:8088/Login.ashx?username="+username+"&password="+password;                try {            //创建URL            URL url = new URL(path);                        //创建http连接            HttpURLConnection conn = (HttpURLConnection)url.openConnection();            //设置连接时间            conn.setConnectTimeout(5000);            //设置请求方式            conn.setRequestMethod("GET");                        //获取请求码            int code = conn.getResponseCode();                        System.out.println("code:"+code);                        if(code==200)            {                //请求成功                //获取响应数据                InputStream is = conn.getInputStream();                //得到响应数据                String result = StreamUtil.readInputStream(is);                                return result;            }            else            {                //请求失败                return null;            }                                } catch (Exception e) {            e.printStackTrace();        }                return null;    }}

package com.example.getserverdata.utils;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;public class StreamUtil {        public static String readInputStream(InputStream is)    {        ByteArrayOutputStream baos = new ByteArrayOutputStream();          byte[] data = http://www.mamicode.com/new byte[1024];          int len = 0;          try {            while((len = is.read(data))!=-1)                  baos.write(data, 0, len);            is.close();            baos.close();            return new String(baos.toByteArray());                    } catch (Exception e) {                    e.printStackTrace();        }                    return null;    }}

package com.example.getserverdata;import com.example.getserverdata.service.LoginService;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends ActionBarActivity {        private EditText et_username;    private EditText et_password;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                et_username = (EditText)findViewById(R.id.et_username);        et_password = (EditText)findViewById(R.id.et_password);    }            public void click(View view)    {                final String username = et_username.getText().toString().trim();        final String password = et_password.getText().toString().trim();                new Thread(){                        public void run(){                                final String result = LoginService.loginByGet(username, password);                                System.out.println("reuslt:"+result);                                if(result!=null)                {                    runOnUiThread(new Runnable(){                        @Override                        public void run() {                                                        Toast.makeText(MainActivity.this, result, 0).show();                        }                                                                    });                                    }                                else                {                    runOnUiThread(new Runnable(){                        @Override                        public void run() {                            Toast.makeText(MainActivity.this, "获取数据失败", 0).show();                        }                    });                                    }                            }                    }.start();                    }    }