android 使用httpget访问并获取http资源（httpget的使用）

class MyTask extends AsyncTask<String, Integer, String> {
static final String TAG = "MyTask";
//onPreExecute方法用于在执行后台任务前做一些UI操作
@Override
protected void onPreExecute() {
Log.i(TAG, "onPreExecute() called");
}

//doInBackground方法内部执行后台任务,不可在此方法内修改UI
@Override
protected String doInBackground(String... params) {
Log.i(TAG, "doInBackground(Params... params) called");
try {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(params[0]);
HttpResponse response = client.execute(get);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String result = "";
String line = "";
while (null != (line = reader.readLine())) {
result += line;
}
System.out.println(result);
return result;
}
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
return null;
}

//onProgressUpdate方法用于更新进度信息
@Override
protected void onProgressUpdate(Integer... progresses) {
Log.i(TAG, "onProgressUpdate(Progress... progresses) called");
}

//onPostExecute方法用于在执行完后台任务后更新UI,显示结果
@Override
protected void onPostExecute(String result) {
Log.i(TAG, "onPostExecute(Result result) called");
}

//onCancelled方法用于在取消执行中的任务时更改UI
@Override
protected void onCancelled() {
Log.i(TAG, "onCancelled() called");
}
}
2.使用方式
MyTask task = new MyTask();
task.execute("HTTP://XXXXX");