Android客户端和Internet的交互

在Android中所集成的HttpClient是(org.apache.http.*)

Android 实现Post向服务器提交数据

熟悉web编程的都很了解get和post这两种传递表单数据的方法。

这里不具体介绍get和post的区别，如需了解请参考：http://www.2cto.com/kf/201112/114558.html

所谓的get传递数据也是我们最常见的一种，如http://127.0.0.1/index.php?param=androidyue,这种方式直接显示在url中，因此很不安全，

而使用post传递数据则不会直接暴露出来，相对来说更加安全一些。post传递也需要key和value。

以下是Android客户端的代码：

package irdc.EX08_01;

/*必需引用apache.http相关类来建立HTTP联机*/
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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;
/*必需引用java.io 与java.util相关类来读写档案*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class EX08_01 extends Activity
{
  /*声明两个Button对象,与几个TextView对象*/
  private Button mButton1,mButton2;
  private TextView mTextView1;
  
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    
    /*透过findViewById建构巳建立TextView与Button对象*/
    mButton1 =(Button) findViewById(R.id.myButton1);
    mButton2 =(Button) findViewById(R.id.myButton2);
    mTextView1 = (TextView) findViewById(R.id.myTextView1);
    
    /*设定OnClickListener来监听OnClick事件*/
    mButton1.setOnClickListener(new Button.OnClickListener()
    {
      /*覆写onClick事件*/
      @Override
      public void onClick(View v)
      {
        /*宣╳网份?串*/
        //String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php";
        String uriAPI = "http://192.168.1.101:89/Android_Web/post_get.aspx";
        /*建立HTTP Post联机*/
        HttpPost httpRequest = new HttpPost(uriAPI);
        /*
         * Post运囫传送变量必须用NameValuePair[]阵在储?
        */
        List <NameValuePair> params = new ArrayList <NameValuePair>();
        params.add(new BasicNameValuePair("str", "I am Post String我们"));
        try
        {
          /*发叨HTTP request*/
          httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
          /*取得HTTP response*/
          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
          /*若状态码为200 ok*/
          if(httpResponse.getStatusLine().getStatusCode() == 200) 
          {
            /*取叨并应?串*/
            String strResult = EntityUtils.toString(httpResponse.getEntity());
            mTextView1.setText(strResult);
          }
          else
          {
            mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
          }
        }
        catch (ClientProtocolException e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace();
        }
        catch (IOException e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace();
        }
        catch (Exception e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace(); 
        } 
        
      }
    });
    mButton2.setOnClickListener(new Button.OnClickListener()
    {
      @Override
      public void onClick(View v)
      {
        // TODO Auto-generated method stub
        /*宣╳网份?串*/
        //String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Get/index.php?str=I+am+Get+String";
        String uriAPI="http://localhost:2094/web_test/Android_Web/post_get.aspx?str=i am nifangzhen";
        /*建立HTTP Get联机*/
        HttpGet httpRequest = new HttpGet(uriAPI);
        try
        {
          /*发叨HTTP request*/
          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
          /*若状态码为200 ok*/
          if(httpResponse.getStatusLine().getStatusCode() == 200) 
          {
            /*取叨并应?串*/
            String strResult = EntityUtils.toString(httpResponse.getEntity());
            /*?除?余?元*/
            strResult = eregi_replace("(\r\n|\r|\n|\n\r)","",strResult);
            mTextView1.setText(strResult);
          }
          else
          {
            mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
          }
        }
        catch (ClientProtocolException e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace();
        }
        catch (IOException e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace();
        }
        catch (Exception e)
        { 
          mTextView1.setText(e.getMessage().toString());
          e.printStackTrace(); 
        } 
      }
    });
  }
    /* 告订?串取占函数 */
    public String eregi_replace(String strFrom, String strTo, String strTarget)
    {
      String strPattern = "(?i)"+strFrom;
      Pattern p = Pattern.compile(strPattern);
      Matcher m = p.matcher(strTarget);
      if(m.find())
      {
        return strTarget.replaceAll(strFrom, strTo);
      }
      else
      {
        return strTarget;
      }
    }
}