学步园

开发做多了，今天有时间整理一些工具类..................

	/**
	 * 判断当前是否有可用的网络以及网络类型 0：无网络 1：WIFI 2：CMWAP 3：CMNET
	 * 
	 * @param context
	 * @return
	 */
	public static int isNetworkAvailable(Context context) {
		ConnectivityManager connectivity = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);
		if (connectivity == null) {
			return 0;
		} else {
			NetworkInfo[] info = connectivity.getAllNetworkInfo();
			if (info != null) {
				for (int i = 0; i < info.length; i++) {
					if (info[i].getState() == NetworkInfo.State.CONNECTED) {
						NetworkInfo netWorkInfo = info[i];
						if (netWorkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
							return 1;
						} else if (netWorkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
							String extraInfo = netWorkInfo.getExtraInfo();
							if ("cmwap".equalsIgnoreCase(extraInfo)
									|| "cmwap:gsm".equalsIgnoreCase(extraInfo)) {
								return 2;
							}
							return 3;
						}
					}
				}
			}
		}
		return 0;
	}