AndroidネットワークプログラミングはHttpCientを使ってウェブサイトにアクセスします。

/*
 *  HttpClientlai        ，    
 * A,  GET  
 * 1,  HttpClient  ；HttpClient httpclient=new DefaultHttpClient();
 * 2,  GET  ,  HttpGet  ：HttpGet httpget=new HttpGet("http://www.baidu.com");
 * 3， HttpClient    HttpGet            HttpResponse   ，      HttpResponse ：
 *  HttpResponse httpresponse=httpclient.execute(httpget);
 * 4, httpresponse     Http  
		HttpEntity entity=httpresponse.getEntity(); 
 * */
public class HttpClientDemo extends Activity {
   TextView response;
   //  HttpClient  
   HttpClient httpclient;
   Handler handler=new Handler(){
	  public void handleMessage(Message msg){
		  if(msg.what==0x123){
			//    response        
			  response.append(msg.obj.toString()+"
");
		  }
	  }
   };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_http_client);
        //1,  DefaultHttpClient  ，    HttpClient    
        httpclient=new DefaultHttpClient();
        response=(TextView) findViewById(R.id.response);
    }
    /*
     *      GET    
     * 
     * */
    public void accessSecret(View v){
    	response.setText("");
    	//    ，    ，      Get  
    	new Thread(){
    		public void run(){
    			//2,    HttpGet  
    			HttpGet httpget=new HttpGet("http://localhost:8080/foo/secret.jsp");//jsp   To cat    
    			try {
    				    //3， HttpClient    HttpGet            HttpResponse   ，      HttpResponse 
					    HttpResponse httpresponse=httpclient.execute(httpget);
					    //4, httpresponse     Http  
					    HttpEntity entity=httpresponse.getEntity();
					    if(entity!=null){
					    	//5,entity       ，     ，       
					    	BufferedReader br=new BufferedReader(new InputStreamReader(entity.getContent()));
					    	String line=null;
					    	while((line=br.readLine())!=null){//           
					    		Message msg=new Message();
					    		msg.what=0x123;
					    		msg.obj=line;
					    	    handler.sendMessage(msg);//  UI    UI  
					    	}
					    }
					    
				} catch (ClientProtocolException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
    			
    			
    		}
    	}.start();
    }
    /*
     *   Post    
     * 
     * 
     * */
   public void showLogin(View v){
	   final View loginDialog=getLayoutInflater().inflate(R.layout.login, null);
	   new AlertDialog.Builder(HttpClientDemo.this)
	       .setTitle("    ")
	       .setView(loginDialog)
	       .setPositiveButton("  ", new DialogInterface.OnClickListener(){

			@Override
			public void onClick(DialogInterface dialog, int which) {
				//             
				
				final String name=((EditText)loginDialog.findViewById(R.id.name)).getText().toString();
				final String pass=((EditText)loginDialog.findViewById(R.id.pass)).getText().toString();
				//    ，    ，      Post  
				new Thread(){
					public void run(){													
							try {
								//2,  HttpPost  
								HttpPost httppost=new HttpPost("http://localhost:8080/foo/login.jsp");//jsp   To cat    
								//3,          ，NameValuePair           
								List<NameValuePair> params=new ArrayList<NameValuePair>();
								params.add(new BasicNameValuePair("name",name));//    
								params.add(new BasicNameValuePair("pass",pass));
								//3,    
								httppost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
								//4,HttpClient    HttpPost  ，    
								HttpResponse httpresponse=httpclient.execute(httppost);
								//5,      200          
								if(httpresponse.getStatusLine().getStatusCode()==200){
									//200：    ，301/302：   ，404：not found      ，501       ，           
									String msg = EntityUtils.toString(httpresponse.getEntity());								
									Looper.prepare();
									//      
									Toast.makeText(HttpClientDemo.this, msg, Toast.LENGTH_LONG).show();
									Looper.loop();
								}
							} catch (ParseException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							} catch (IOException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}																			
					}
				}.start();
				
			}
	       }).setNegativeButton("  ", null).show();

    
}