使用Post和Get方式傳輸HTTP參數

關於HTTP傳輸的介紹請見http://blog.csdn.net/theworldsong/article/details/9107789。

以下例子分別以POST和GET方式向網站傳輸數據，並返回數據將其顯示。

package dfzy.EX088;
/*必需引用apache.http相關類來建立HTTP聯機*/
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) 
      { 
        //聲明地址
        String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php";
        //建立HTTP Post聯機
        HttpPost httpRequest = new HttpPost(uriAPI); 
        //Post運行傳送變量必須用NameValuePair[]儲存，這是一種封裝，專門用於HTTP的POST傳輸
        List <NameValuePair> params = new ArrayList <NameValuePair>(); 
        params.add(new BasicNameValuePair("str", "I am Post String")); 
        try 
        { 
          //將要附帶的數據包放入，並聲明爲UTF_8字符格式
          httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8)); 
          //發送後，會等待返回一個HttpResponse
          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest); 
          //若狀態碼爲200
          if(httpResponse.getStatusLine().getStatusCode() == 200)  
          { 
            /*獲取字符串*/
            String strResult = EntityUtils.toString(httpResponse.getEntity()); 
            mTextView1.setText(strResult); 
          } 
          else 
          { 
            mTextView1.setText("獲取失敗"); 
          } 
        } 
        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聯機*/
        HttpGet httpRequest = new HttpGet(uriAPI); 
        try 
        { 
          /*發送獲取的HTTP request,並等待返回一個HttpResponse*/
          HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest); 
          /*若狀態碼爲200*/
          if(httpResponse.getStatusLine().getStatusCode() == 200)  
          { 
            //獲取字符串
            String strResult = EntityUtils.toString(httpResponse.getEntity());
            mTextView1.setText(strResult); 
          } 
          else 
          { 
            mTextView1.setText("獲取失敗"); 
          } 
        } 
        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();  
        }  
      } 
    }); 
  }
} 

代碼中使用的網站可能失效，但是明白道理就行，就是返回一串字符。

另參考
http://52android.blog.51cto.com/2554429/496621

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