判断手机是否已经连接上网络

ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
		if (cwjManager.getActiveNetworkInfo() != null) {
			if (cwjManager.getActiveNetworkInfo().isAvailable()) {
				String type = cwjManager.getActiveNetworkInfo().getTypeName();
				System.out.println("_____________________-" + type);
			}
			;
		}else {
			System.out.println("_____________________-" + cwjManager.getActiveNetworkInfo());
		}