Android HttpClient : NetworkOnMainThreadException
===

I have some code below:

    protected void testConnection(String url) {
    	DefaultHttpClient httpclient = new DefaultHttpClient();
    	HttpGet httpget = new HttpGet(url);
    	ResponseHandler<String> responsehandler = new BasicResponseHandler();
    	
    	try {
    		String connection = httpclient.execute(httpget, responsehandler);
    		Toast.makeText(getBaseContext(), R.string.connection_succeed, Toast.LENGTH_SHORT).show();
    		view_result.setText(connection);
    	} catch(IOException e) {
    		Toast.makeText(getBaseContext(), R.string.connection_failed, Toast.LENGTH_SHORT).show();
    	}
    	httpclient.getConnectionManager().shutdown();
    }

and add a permission in Menifest:

    <uses-permission android:name="android.permission.INTERNET"/>


But it goes an exception:
NetworkOnMainThreadException, 
How can i do?