android createConnection

	public static HttpURLConnection createConnection(Context context, URL url){
		HttpURLConnection connection = null;
		try
		{
			ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo wifiInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
			if ((wifiInfo.isAvailable()) && (wifiInfo.isConnected()))
			{
				connection = (HttpURLConnection)url.openConnection();
				return connection;
			}
			NetworkInfo mobileInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
			if ((mobileInfo != null) && (mobileInfo.isAvailable()) && (mobileInfo.isConnected()))
			{
				Log.d("net", "connect by mobile");
				String str = android.net.Proxy.getDefaultHost();
				if (str != null)
				{
					java.net.Proxy proxy = new java.net.Proxy(Proxy.Type.HTTP, new InetSocketAddress(android.net.Proxy.getDefaultHost(), android.net.Proxy.getDefaultPort()));
					connection = (HttpURLConnection)url.openConnection(proxy);
					return connection;
				}
				return (HttpURLConnection)url.openConnection();
			}
			Log.d("net", "connect by other");
			return (HttpURLConnection)url.openConnection();
		}
		catch (Exception localException)
		{
			localException.printStackTrace();
			Log.d("net", "connect errpr");
			connection = null;
		}
		return connection;
	}

Androidネットワーク環境に応じたConnectionの作成