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  • Android与server通信的方法之中的一个(json)效率不高安全性不好

    http通信。以xml或者json为载体。相互通信数据。

    Android对于http的网络通信,提供了标准的java接口——httpURLConnection接口。以及apache的接口——httpclient接口。当中我自己用的比較多的而是httpclient这个接口,由于它的功能更为丰富非常有效。

    同一时候http通信也分为post方式和get的方式,两个相比較的话。post传送的数据量比較大,安全性也比較高。因此在做数据查询时。我会用get方式。而在做数据加入、改动或删除时,我就用Post方式
    下面是基于httpclient接口,用get和post的方式通信的代码。
    (get方式)

    protected void onCreate(Bundle savedInstanceState) {
    
           super.onCreate(savedInstanceState);
    
           setContentView(R.layout.login);
    
           TextView text = (TextView) this.findViewById(R.id.text_http);
    
           String httpurl = “http://10.0.2.2:8080/SIM_SERVER/org/Org-list”;
    
           //①httpget连接对象
    
           HttpGet httpRequest = new HttpGet(httpurl);
    
           //②取得httpclient的对象
    
           HttpClient httpclient = new DefaultHttpClient();
    
           try {
    
             //③请求httpclient,取得httpResponse
    
               HttpResponse httpResponse = httpclient.execute(httpRequest);
    
        //④推断请求是否成功     if(httpResponse.getStatusLine().getStatusCode()==HttpStatus.SC_OK){             //⑤取得返回的字符串
    
                  String strResult = EntityUtils.toString(httpResponse.getEntity());
    
                  text.setText(strResult);
    
               }else{
    
                  text.setText(“请求失败”);
    
               }
    
           } catch (ClientProtocolException e) {
    
               e.printStackTrace();
    
           } catch (IOException e) {
    
               e.printStackTrace();
    
           }
    
        }
    
    (post方式)
    
    protected void onCreate(Bundle savedInstanceState) {
    
           super.onCreate(savedInstanceState);
    
           this.setContentView(R.layout.login);
    
           TextView text = (TextView) this.findViewById(R.id.text_http);
    
           //①http连接地址
    
           String url = “http://10.0.2.2:8080/SIM_SERVER/and/Android-test”;
    
            //②取得httppost连接对象
    
           HttpPost httpPost = new HttpPost(url);
    
            //③使用NameValuePair来保存要传递的Post參数
    
           List<NameValuePair> params = new ArrayList<NameValuePair>();
    
            //④加入要传递的參数
    
           params.add(new BasicNameValuePair(“parentId”, “0″));
    
     
    
           HttpEntity httpentity;
    
           try {
    
                //⑤设置字符集
    
               httpentity = new UrlEncodedFormEntity(params, “utf-8″);
    
                //⑥把字符集设置在请求request里面
    
               httpPost.setEntity(httpentity);
    
                 //⑦取得httpclient
    
               HttpClient httpClient = new DefaultHttpClient();
    
                 //⑧请求发送,并获得response
    
               HttpResponse httpResponse = httpClient.execute(httpPost);
    
    //⑨推断请求是否成功     if(httpResponse.getStatusLine().getStatusCode()==HttpStatus.SC_OK){              //⑩取得返回字符串
    
                  String strResult = EntityUtils.toString(httpResponse.getEntity());
    
                  text.setText(strResult);
    
               }else{
    
                  text.setText(“请求失败”);
    
               }
    
           } catch (UnsupportedEncodingException e) {
    
               e.printStackTrace();
    
           } catch (ClientProtocolException e) {
    
               e.printStackTrace();
    
           } catch (IOException e) {
    
               e.printStackTrace();
    
           }
    
     
    
        }


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  • 原文地址:https://www.cnblogs.com/gavanwanggw/p/6911264.html
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