判断网络连接是否已开 true 已打开 false 未打开

/**
* 得到手机是否连接到Wi-Fi网络
*
* @return
*/
public static boolean isWifiConnect(Context context) {

ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
return networkInfo.isConnected();

}

/**
* 得到手机是否连接到移动网络
*
* @return
*/
public static boolean isMobileConnect(Context context) {
ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
return networkInfo.isConnected();

}

/**
* 判断手机是否连接到网络
*
* @return
*/
public static boolean isNetworkConnect(Context context) {
ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
return (networkInfo != null && networkInfo.isConnected());
}