Android用Apache HttpClient 实现POST和Get请求

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

1.  GET实现

Java代码  


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

 

Java代码  


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;