为什么端口低于1024特权？(Why are ports below 1024 privileged? [closed])

 通常有两个键调试密钥和释放密钥。 在签署应用程序时，您希望使用发布密钥。 为此，您想要与签名的apk进行比较 
 
 步骤1： 
 
 例如，你的apk名称是A，你正在签署并为A.apk创建一个密钥库，即A.keystore将在某个驱动器位置创建。让我们在E盘中考虑它。 
 
 第2步： 
 
 现在找到C盘中的jdk（考虑到Windows并分配C盘） 
 
 C：\ Program Files \ Java \ jdk1.7.0 \ bin> keytool -list -v -keystore E：\ A.keystore -alias A 
 
 因此它将创建SHA-1 fingure打印 
 
 复制并粘贴在谷歌地图控制台中，它将生成一个密钥。在地图中使用它。 

Generally there are two keys debug key and release key. while signing app, you want to use release key. For that you want to compare that with signed apk 
 
Step 1:
 
Say for example your apk name is A and you are signing and creating a keystore for A.apk ie A.keystore will be created in some drive location.Let's consider it in E drive.
 
step 2:
 
Now locate to jdk in C drive(Considering for windows and assigning C drive)
 
C:\Program Files\Java\jdk1.7.0\bin>keytool -list -v -keystore E:\A.keystore -alias A
 
So it will create SHA-1 fingure print 
 
copy and paste that in google map console, it wll generate a key.use it in maps.