Android连接服务器的五种方式

1. URL

public class MyURLActivity extends Activity {  
        @Override  
        protected void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            Thread thread = new Thread(new Runnable() {  
                @Override  
                public void run() {  
                    URL url;  
                    String temp;  
                    StringBuffer sb = new StringBuffer();  
                    try {  
                        url = new URL("http://192.168.18.157?name=allen");// 根据自己的服务器地址填写  
                        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));// 获取输入流  
                        while ((temp = in.readLine()) != null) {  
                            sb.append(temp);  
                        }  
                        System.out.println(sb.toString());  
                        in.close();  
                    } catch (MalformedURLException me) {  
                        System.err.println("你输入的URL格式有问题！");  
                        me.printStackTrace();  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                    }  
                }  
            });  
            thread.start();  
        }  
}  

2. HttpClient

public class MyHttpClientActivity extends Activity {  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        Thread thread = new Thread(new Runnable() {  
            @Override  
            public void run() {  
                HttpClient client = new DefaultHttpClient();  
                HttpGet httpGet = new HttpGet("http://192.168.18.157?name=allen");// 根据自己的服务器地址填写  
                try {  
                    HttpResponse response = client.execute(httpGet);  
                    String temp;  
                    StringBuffer sb = new StringBuffer();  
                    BufferedReader in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));// 获取输入流  
                    while ((temp = in.readLine()) != null) {  
                        sb.append(temp);  
                    }  
                    System.out.println(sb.toString());  
                    in.close();  
                } catch (ClientProtocolException e) {  
                    e.printStackTrace();  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
            }  
        });  
        thread.start();  
    }  
}

3. HttpURLConnection

public class MyHttpURLConnectionActivity extends Activity {  

    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        Thread thread = new Thread(new Runnable() {  
            @Override  
            public void run() {  
                BufferedReader bufferedReader = null;  
                try {  
                    URL url = new URL("http://192.168.18.157");// 根据自己的服务器地址填写  
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();  
                    conn.setConnectTimeout(10000);  
                    conn.setDoOutput(true);// 允许输出  
                    conn.setRequestMethod("POST");  
                    conn.setRequestProperty("Connection", "Keep-Alive");  
                    conn.setRequestProperty("Charset", "GBK");  
                    OutputStream os = conn.getOutputStream();  
                    os.write("name=allen".getBytes());  
                    if (conn.getResponseCode() == 200) {  
                        System.out.println(conn.toString());  
                        InputStream is = conn.getInputStream();  
                        InputStreamReader isr = new InputStreamReader(is, "GBK");  
                        bufferedReader = new BufferedReader(isr);  
                    }  
                    String result = "";  
                    String line = "";  
                    if (bufferedReader != null) {  
                        try {  
                            while ((line = bufferedReader.readLine()) != null) {  
                                result += line;  
                            }  
                        } catch (IOException e) {  
                            e.printStackTrace();  
                        }  
                    }  
                    System.out.println(result);  
                } catch (MalformedURLException e) {  
                    // URL格式错误  
                    e.printStackTrace();  
                } catch (UnsupportedEncodingException e) {  
                    // 不支持你设置的编码  
                    e.printStackTrace();  
                } catch (ProtocolException e) {  
                    // 请求方式不支持  
                    e.printStackTrace();  
                } catch (IOException e) {  
                    // 输入输出通讯出错  
                    e.printStackTrace();  
                }  
            }  
        });  
        thread.start();  
    }  
}  

4. ksoap2

public class MyKsoap2Activity extends Activity {  

    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        Thread thread = new Thread(new Runnable() {  
            @Override  
            public void run() {  
                String URL = "http://cjf780426.xicp.net:803/Demo/DEMO1/GBSvr.dll/soap/IGBSvr";  
                String NAMESPACE = "http://tempuri.org/";  
                SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);  
                envelope.dotNet = true;  
                HttpTransportSE ht = new HttpTransportSE(URL);  
                ht.debug = true;  
                String METHOD_NAME = "GBlogin";  
                String SOAP_ACTION = "urn:GBSvrIntf-IGBSvr#GBlogin";  
                SoapObject rpc = new SoapObject(NAMESPACE, METHOD_NAME);  
                rpc.addProperty("UserName", "AllenSTU");  
                rpc.addProperty("UserPWD", "AllenSTU");  
                envelope.bodyOut = rpc;  
                envelope.setOutputSoapObject(rpc);  
                try {  
                    ht.call(SOAP_ACTION, envelope);  
                    System.out.println((String) envelope.getResponse());  
                } catch (SoapFault e) {  
                    // TODO Auto-generated catch block  
                    e.printStackTrace();  
                } catch (IOException e) {  
                    // TODO Auto-generated catch block  
                    e.printStackTrace();  
                } catch (XmlPullParserException e) {  
                    // TODO Auto-generated catch block  
                    e.printStackTrace();  
                }  
            }  
        });  
        thread.start();  
    }  
}  

5. Apache接口

public class MainActivity extends Activity {  
    private TextView textView;  
    private Button get,post;  
    /** Called when the activity is first created. */  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  

        textView = (TextView)findViewById(R.id.textView);  
        get = (Button)findViewById(R.id.get);  
        post = (Button)findViewById(R.id.post);  

        //绑定按钮监听器  
        get.setOnClickListener(new OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                //注意：此处ip不能用127.0.0.1或localhost,Android模拟器已将它自己作为了localhost  
                String uri = "http://192.168.22.28:8080/myapp/http.jsp?parameter=以Get方式发送请求";  
                textView.setText(get(uri));  
            }  
        });  
        //绑定按钮监听器  
        post.setOnClickListener(new OnClickListener() {  
            @Override  
            public void onClick(View v) {  
                String uri = "http://192.168.22.28:8080/myapp/http.jsp";  
                textView.setText(post(uri));  
            }  
        });  
    }  
    /** 
     * 以get方式发送请求，访问web 
     * @param uri web地址 
     * @return 响应数据 
     */  
    private static String get(String uri){  
        BufferedReader reader = null;  
        StringBuffer sb = null;  
        String result = "";  
        HttpClient client = new DefaultHttpClient();  
        HttpGet request = new HttpGet(uri);  
        try {  
            //发送请求，得到响应  
            HttpResponse response = client.execute(request);  

            //请求成功  
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){  
                reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
                sb = new StringBuffer();  
                String line = "";  
                String NL = System.getProperty("line.separator");  
                while((line = reader.readLine()) != null){  
                    sb.append(line);  
                }  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        finally{  
            try {  
                if (null != reader){  
                    reader.close();  
                    reader = null;  
                }  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
        if (null != sb){  
            result =  sb.toString();  
        }  
        return result;  
    }  
    /** 
     * 以post方式发送请求，访问web 
     * @param uri web地址 
     * @return 响应数据 
     */  
    private static String post(String uri){  
        BufferedReader reader = null;  
        StringBuffer sb = null;  
        String result = "";  
        HttpClient client = new DefaultHttpClient();  
        HttpPost request = new HttpPost(uri);  

        //保存要传递的参数  
        List params = new ArrayList();  
        //添加参数  
        params.add(new BasicNameValuePair("parameter","以Post方式发送请求"));  

        try {  
            //设置字符集  
            HttpEntity entity = new UrlEncodedFormEntity(params,"utf-8");  
            //请求对象  
            request.setEntity(entity);  
            //发送请求  
            HttpResponse response = client.execute(request);  

            //请求成功  
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){  
                System.out.println("post success");  
                reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
                sb = new StringBuffer();  
                String line = "";  
                String NL = System.getProperty("line.separator");  
                while((line = reader.readLine()) != null){  
                    sb.append(line);  
                }  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        finally{  
            try {  
                //关闭流  
                if (null != reader){  
                    reader.close();  
                    reader = null;  
                }  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
        if (null != sb){  
            result =  sb.toString();  
        }  
        return result;  
    }  
}