Android札记（1）网络 wifi等判断

Context context = listActivity.getApplicationContext();//获取应用上下文		ConnectivityManager connectivityManager = (ConnectivityManager) context				.getSystemService(Context.CONNECTIVITY_SERVICE);//获取系统的连接服务		NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();//获取网络的连接情况		if(activeNetInfo.getType()==ConnectivityManager.TYPE_WIFI){			//判断WIFI网		}else if(activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE) {			//判断3G网