Android进阶2之Http操作访问网络-优快云博客

本文介绍了一个简单的HTTP GET请求示例，演示了如何使用Apache HttpClient库来发起GET请求并解析服务器响应。通过此示例，读者可以了解从创建请求到处理响应数据的基本流程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

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：

[java] view plain copy print ?

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 Button button = null;
private TextView text = null;
private HttpResponse httpResponse = null;
private HttpEntity httpEntity = null;
@Override
public 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() {
@Override
public 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httpEntity
httpEntity = 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();
}
}
}
});
}
}

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 Button			button			= null;
	private TextView		text			= null;
	private HttpResponse	httpResponse	= null;
	private HttpEntity		httpEntity		= null;

	@Override
	public 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() {
			@Override
			public 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httpEntity
					httpEntity = 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();
					}
				}
			}
		});
	}
}