Http操作访问网络

Get

操作步骤：<1>生成请求对象HttpGet httpGet = new HttpGet("请求地址。。。。。");<2>生成客户端对象HttpClient httpClient = new DefaultHttpClient();<3>执行请求HttpResponse httpResponse = httpClient.execute(httpGet);<4>接受响应HttpEntity  httpEntity = httpResponse.getEntity();<5>得到数据流InputStream  inputStream = httpEntity.getContent();注意：要添加权限： <uses-permission android:name="android.permission.INTERNET" />

具体实现：

package xiaosi.httpResponse;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;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 android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class HttpResponseActivity extends Activity{private Buttonbutton= null;private TextViewtext= null;private HttpResponsehttpResponse= null;private HttpEntityhttpEntity= null;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);text = (TextView) findViewById(R.id.text);button = (Button) findViewById(R.id.button);button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){// 生成一个请求对象，参数就是地址HttpGet httpGet = new HttpGet("http://www.baidu.com");// 生成Http客户端HttpClient httpClient = new DefaultHttpClient();InputStream inputStream = null;// 使用HTTP客户端发送请求对象try{// 发送请求的响应httpResponse = httpClient.execute(httpGet);// 代表接收的http消息，服务器返回的消息都在httpEntityhttpEntity = httpResponse.getEntity();if(httpResponse.getStatusLine().getStatusCode() == 200){inputStream = httpEntity.getContent();BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));String result = "";String line = "";while ((line = reader.readLine()) != null){result = result + line;}text.setText(result);}}catch (ClientProtocolException e){e.printStackTrace();}catch (Exception e){e.printStackTrace();}finally{try{inputStream.close();}catch (IOException e){e.printStackTrace();}}}});}}