HttpClient和HttpResponse的使用

HttpClient ：发起Http连接请求的对象，
HttpResponse ：Http 请求返回的响应。

 

总的设计思路如下：

发送请求：(HttpResponse)response=(HttpClient)client.execute((HttpGet)request);
获取响应数据：response.getEntity().getContent();

简单的示例举例如下，主要实现获取www.baidu.com的内容： 特别注意要在AndroidManifest.xml添加访问网络的权限！！！

MainActivity.java

package com.android.httpclient;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URI;
import java.net.URISyntaxException;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

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

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
	private Button btn;
	private TextView tv;
	private String content = null;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        btn = (Button) findViewById(R.id.button1);
        tv = (TextView) findViewById(R.id.textView1);
        btn.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				HttpClient client = new DefaultHttpClient();
				HttpGet request = new HttpGet("http://www.baidu.com/");
				try{
					HttpResponse response = client.execute(request);
					BufferedReader reader = new BufferedReader(new InputStreamReader(
							response.getEntity().getContent()));
					for(String s = reader.readLine(); s != null; s = reader.readLine()){
						content += s;
					}
					tv.setText(content);
				}catch (Exception e){
					e.printStackTrace();
				}
			}
        	
        });
        
    }
}

main.xml

AndroidManifest.xml