25.android网络编程-get方式提交数据（HTML源文件查看器）

使用Utils工具，创建字节输出流，读取输入流的文本数据时，同时把数据写入到输出流

Utils.java

 

package com.ldw.htmlView;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Utils {
	
	public static String getTextFromStream(InputStream is){
		
		byte[] b = new byte[1024];
		int len = 0;
		//创建字节输出流，读取输入流的文本数据时，同时把数据写入到输出流
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		try {
			while((len = is.read(b)) != -1){
				bos.write(b, 0, len);
			}
			//把字节数组输出流里面的数据，转换成字节数组
			String text = new String(bos.toByteArray());
			return text;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

}

 

逻辑代码

 

public class MainActivity extends Activity {

	Handler handler = new Handler(){
		public void handleMessage(android.os.Message msg){
			Toast.makeText(MainActivity.this, (String) msg.obj, Toast.LENGTH_SHORT).show();
		}
	};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void click(View v){
    	EditText et_name = (EditText) findViewById(R.id.et_name);
    	EditText et_pass = (EditText) findViewById(R.id.et_pass);
    	
    	String name = et_name.getText().toString();
    	String pass = et_pass.getText().toString();
    	
    	final String path = "http://192.168.0.102/web2/servlet/LoginServlet?name=" + URLEncoder.encode(name) + "&pass=" + pass;
    	
    	Thread t = new Thread(){
    		
    		@Override
    		public void run(){
    	    	try {
    	    		//2.把网址封装成一个url对象
    				URL url = new URL(path);
    				//3.获取客户端和服务器的连接对象，此时还没建立连接
    				HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    				//4.对链接对象进行初始化
    				conn.setRequestMethod("GET");
    				//设置连接超时网络不好或者地址不对
    				conn.setConnectTimeout(5000);
    				//设置读取超时客户端读取不到数据
    				conn.setReadTimeout(5000);
    				//如果状态码是200请求成功
    				if(conn.getResponseCode() == 200){
    					//得到服务器响应头重的流，流中的数据就是客户端请求的额数据
    					InputStream is = conn.getInputStream();
    					//读取流里面的数据
    					String text = Utils.getTextFromStream(is);
    					
    					Message msg = handler.obtainMessage();
    					msg.obj = text;
    					handler.sendMessage(msg);
    				}else{
    					
    				}
    			} catch (Exception e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    			}
    		}
    	};
    	t.start();
    	

    }