安卓HttpClient操作

最新推荐文章于 2021-12-07 11:00:03 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/wyb_hardworking/article/details/38515807

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本文介绍了一个简单的Android应用示例，该应用通过按钮触发网络请求，使用Apache HttpClient库访问服务器并读取返回的数据。

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package com.example.http01;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
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;

public class MainActivity extends Activity {

	private Button button;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		button = (Button)findViewById(R.id.buttonId);
		
		ButtonListener listener = new ButtonListener();
		button.setOnClickListener(listener);
	}
	
	
	class ButtonListener implements OnClickListener{

		@Override
		public void onClick(View view) {
			// 原则：在主线程当中不能够访问网络
			NetworkThread nt = new NetworkThread();
			nt.start();
		}

	}
	
	class NetworkThread extends Thread{

		@Override
		public void run() {
			// 创建HttpClient
			HttpClient httpClient = new DefaultHttpClient();
			// 创建代表请求的对象，参数是访问的服务器地址
			// http://www.marschen.com/data1.html
			HttpGet httpGet = new HttpGet("http://www.marschen.com/data1.html");
			
			// 执行请求，获取服务器发还的相应对象
			try{
				HttpResponse resp = httpClient.execute(httpGet);
				//检查相应的状态是否正常。检查状态码的值是否等于200
				int code = resp.getStatusLine().getStatusCode();
				if(code == 200){
					//从相应对象当中取出数据
					HttpEntity entity = resp.getEntity();
					InputStream in = entity.getContent();
					BufferedReader reader = new BufferedReader(new InputStreamReader(in));
					String line = reader.readLine();
					//通过日志来记录数据
					Log.d("HTTP", "从服务器取得的数据为" + line);
				}
			}catch(Exception e){
				e.printStackTrace();
			}
			
		}
		
	}
}