使用Post和Get方式传输HTTP参数

关于HTTP传输的介绍请见http://blog.csdn.net/theworldsong/article/details/9107789。

以下例子分别以POST和GET方式向网站传输数据，并返回数据将其显示。

package dfzy.EX088;/*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; import dfzy.EX088.R;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 EX088 extends Activity {   private Button mButton1,mButton2;   private TextView mTextView1;   public void onCreate(Bundle savedInstanceState)   {     super.onCreate(savedInstanceState);     setContentView(R.layout.main);     mButton1 =(Button) findViewById(R.id.myButton1);     mButton2 =(Button) findViewById(R.id.myButton2);    mTextView1 = (TextView) findViewById(R.id.myTextView1);     mButton1.setOnClickListener(new Button.OnClickListener()     {       public void onClick(View v)       {         //声明地址        String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php";        //建立HTTP Post联机        HttpPost httpRequest = new HttpPost(uriAPI);         //Post运行传送变量必须用NameValuePair[]储存，这是一种封装，专门用于HTTP的POST传输        List <NameValuePair> params = new ArrayList <NameValuePair>();         params.add(new BasicNameValuePair("str", "I am Post String"));         try         {           //将要附带的数据包放入，并声明为UTF_8字符格式          httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));           //发送后，会等待返回一个HttpResponse          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);           //若状态码为200          if(httpResponse.getStatusLine().getStatusCode() == 200)            {             /*获取字符串*/            String strResult = EntityUtils.toString(httpResponse.getEntity());             mTextView1.setText(strResult);           }           else           {             mTextView1.setText("获取失败");           }         }         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)       {         String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php?str=I+am+Get+String";         /*建立HTTP Get联机*/        HttpGet httpRequest = new HttpGet(uriAPI);         try         {           /*发送获取的HTTP request,并等待返回一个HttpResponse*/          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);           /*若状态码为200*/          if(httpResponse.getStatusLine().getStatusCode() == 200)            {             //获取字符串            String strResult = EntityUtils.toString(httpResponse.getEntity());            mTextView1.setText(strResult);           }           else           {             mTextView1.setText("获取失败");           }         }         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();          }        }     });   }} 

代码中使用的网站可能失效，但是明白道理就行，就是返回一串字符。

另参考
http://52android.blog.51cto.com/2554429/496621

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