手机移动网络是否连接

public static boolean isMobileConnected(Context context)
{
if (context != null) 
{
 ConnectivityManager mConnectivityManager = (ConnectivityManager)context.getSystemService("connectivity");
 NetworkInfo mMobileNetworkInfo = mConnectivityManager.getNetworkInfo(0);
 if (mMobileNetworkInfo != null)
 {
return mMobileNetworkInfo.isAvailable();
 }
}
return false;
}