Android用Apache HttpClient 实现POST和Get请求

类 : org.apache.http.client.HttpClient;

1.  GET实现

 package com.yarin.android.Examples_08_02;

 import java.io.IOException;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.util.EntityUtils;
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

 public class Activity02 extends Activity {
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.http);
         TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
         // http地址
         String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";
         // HttpGet连接对象
         HttpGet httpRequest = new HttpGet(httpUrl);
         try {
             // 取得HttpClient对象
             HttpClient httpclient = new DefaultHttpClient();
             // 请求HttpClient，取得HttpResponse
             HttpResponse httpResponse = httpclient.execute(httpRequest);
             // 请求成功
             if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                 // 取得返回的字符串
                 String strResult = EntityUtils.toString(httpResponse
                         .getEntity());
                 mTextView.setText(strResult);
             } else {
                 mTextView.setText("请求错误!");
             }
         } catch (ClientProtocolException e) {
             mTextView.setText(e.getMessage().toString());
         } catch (IOException e) {
             mTextView.setText(e.getMessage().toString());
         } catch (Exception e) {
             mTextView.setText(e.getMessage().toString());
         }

         // 设置按键事件监听
         Button button_Back = (Button) findViewById(R.id.Button_Back);
         /* 监听button的事件信息 */
         button_Back.setOnClickListener(new Button.OnClickListener() {
             public void onClick(View v) {
                 /* 新建一个Intent对象 */
                 Intent intent = new Intent();
                 /* 指定intent要启动的类 */
                 intent.setClass(Activity02.this, Activity01.class);
                 /* 启动一个新的Activity */
                 startActivity(intent);
                 /* 关闭当前的Activity */
                 Activity02.this.finish();
             }
         });
     }
 }

 

 

2.  POST

 

 package com.yarin.android.Examples_08_02;

 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.NameValuePair;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.util.EntityUtils;
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

 public class Activity03 extends Activity {
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.http);
         TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
         // http地址
         String httpUrl = "http://192.168.1.110:8080/httpget.jsp";
         // HttpPost连接对象
         HttpPost httpRequest = new HttpPost(httpUrl);
         // 使用NameValuePair来保存要传递的Post参数
         List<NameValuePair> params = new ArrayList<NameValuePair>();
         // 添加要传递的参数
         params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));
         try {
             // 设置字符集
             HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");
             // 请求httpRequest
             httpRequest.setEntity(httpentity);
             // 取得默认的HttpClient
             HttpClient httpclient = new DefaultHttpClient();
             // 取得HttpResponse
             HttpResponse httpResponse = httpclient.execute(httpRequest);
             // HttpStatus.SC_OK表示连接成功
             if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                 // 取得返回的字符串
                 String strResult = EntityUtils.toString(httpResponse.getEntity());
                 mTextView.setText(strResult);
             } else {
                 mTextView.setText("请求错误!");
             }
         } catch (ClientProtocolException e) {
             mTextView.setText(e.getMessage().toString());
         } catch (IOException e) {
             mTextView.setText(e.getMessage().toString());
         } catch (Exception e) {
             mTextView.setText(e.getMessage().toString());
         }
         // 设置按键事件监听
         Button button_Back = (Button) findViewById(R.id.Button_Back);
         /* 监听button的事件信息 */
         button_Back.setOnClickListener(new Button.OnClickListener() {
             public void onClick(View v) {
                 /* 新建一个Intent对象 */
                 Intent intent = new Intent();
                 /* 指定intent要启动的类 */
                 intent.setClass(Activity03.this, Activity01.class);
                 /* 启动一个新的Activity */
                 startActivity(intent);
                 /* 关闭当前的Activity */
                 Activity03.this.finish();
             }
         });
     }
 }

 

Apache org.apache.http.client.HttpClient;