HttpURLConnection 通常在新開的一個線程內進行活動,有一個小細節需要重視,否則獲不到網絡數據。
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
HttpURLConnection connection = null;
try {
URL url = new URL("www.baidu.com");//注意這裏
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder response = new StringBuilder();
String line;
while((line = reader.readLine()) != null){
response.append(line);
}
Message message = new Message();
message.what = SHOW_RESPONSE;
message.obj = response.toString();
handler.sendMessage(message);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}finally{
if(connection != null){
connection.disconnect();
}
}
}
}).start();
由於現在的瀏覽器非常智能,我們輸入網址的時候不需要加前面的幾個字母和符號,將這個習慣帶進代碼中就不行了,應該改爲:
URL url = new URL("http://www.baidu.com");
這樣就能獲得數據了。