This is a somewhat complicated problem. Android is essentially a linux, and opencv can be compiled into a static library. You must practice to know how to do it. Is there any change in the interface of version 2.9 and 3.0 of the header file you included?
Assume that AS is installed in the main environment, and CMAKE, NINJA, NDK and other environments are all installed by using AS management tools. 1. Save the above code in the bat file and modify the related directory path.
2. Download the opencv source code and copy the script to the directory at the same level as the OpenCV source code. If you can know that cmake's -H is the specified source code path and -B is the specified build directory.
3. If this script is executed, the ninja project will be generated under buildarmeabi-v7a under normal circumstances. Ninja has the same function as the make program in Linuxgcc.
4. Open the cmd and cd to the buildarmeabi-v7a directory, and then execute E: binsdkcmake3.6.411459 binninja to start compiling and building opencv.
5. Under normal circumstances, after the compilation is completed, there will be an opencv static library in the buildarmeabi-v7alib directory.
6. If you want to compile arm64-v8a, change all armeabi-v7a in the script to arm64-v8a.
7. Because some dependencies are difficult to handle and easily lead to compilation failure, I added these instructions to cancel compilation and build these modules. If the topic owner needs to compile these modules, he needs to solve the dependency problem himself.
What is the difference between linux dynamic library and static library?
Dynamic link libraries and static link libraries are generally compiling and integrating a series of interfaces (functions).
After the program source code is compiled, it is compiled by a compiler and linked with these libraries through a linker.
The difference between dynamic link library and static link library is that when the linker links, the static library will be compiled directly into the program.
There is no dynamic link library, here we call it dependency (dynamic library and static library).
The running of the program needs these dependencies, and the program itself already contains dependencies after the program is statically linked.
The dynamically linked program itself does not contain such dependencies, and these dependencies need to be installed into the operating system (dynamic library, runtime library) by the executor himself.
These libraries are dynamically loaded when the program is running.
The common suffix of dynamic libraries on linux is. So ...
Static libraries usually have suffixes. a.
Because the static link will directly compile the library into a program, the statically compiled program is larger than the dynamic link.
This is because static linking will compile the link library into the program, so it will take up a lot.
For this reason, static libraries are not easy to maintain and update. If there is a bug in the implementation of the link library, you need to update the whole program because the static library has been compiled into the program.
But the dynamic library is not like this, because the dynamic library is dynamically loaded when the program is running, so we only need to update the dynamic library, and we don't need to update all the programs (software) that depend on it.
On the other hand, many programs will use the same link library, that is, many programs (software) will have the same dependency.
If these dependencies are compiled statically, it will cause too many storage resources and waste resources.
By using dynamic libraries, these programs (software) can enjoy a link library instead of each program having a link library, which greatly reduces the space occupied by storage resources.
What does uc programming mean?
UC programming refers to the system function of Unix and the design and management mechanism of Unix system.
The contents include:
1.UnixLinux static library and * * * shared library.
2. Error handling of C language
3. Environmental variables and environmental tables
4. Memory management of 4.UNIX 4. UnixLinux
5.UnixLinux file operation
6. Directory operation of 6.UNIX 6. UnixLinux
7. Process management of 7.UNIX 7. UnixLinux
8. Signal processing of 8.UNIX 8. UnixLinux
9.IPC- interprocess communication (* * * memory sharing, message queuing)
Network programming of UNIX and Linux
Multi-thread development of 1 1.Unix Linux
How to set up static mac under linux?
Experimental environment
Ubuntu 18.04 server version
Campus network environment
Configure a static IP address using DHCP.
The simplest and suggested method to assign static IP addresses to devices on LAN is to set up static DHCP on the router. Static DHCP or DHCP reservation is a function that most routers can use. Whenever a device requests an address from the DHCP server, it will make the DHCP server automatically assign the same IP address to a specific network device. It works by assigning static IP to the unique MAC address of the device. The steps to configure DHCP reservation vary from router to router, so it is recommended to consult the vendor's documentation.
Network plan
Starting from version 17. 10, Netplan is the default network management tool on Ubuntu, replacing the configuration file /etc/network/interfaces used to configure the network on Ubuntu.
The network plans to use a configuration file with YAML syntax. To configure a network interface with Netplan, you only need to create a YAML description for the interface, and then Netplan will generate the required configuration file for the renderer tool you choose.
Netplan currently supports two renderers, NetworkManager and SystemD-Network D. NetworkManager is mainly used on the desktop and Systemd-networkd is used on the server without GUI.
Configure a static IP address on Ubuntu server.
Newer versions of Ubuntu use "predictable network interface names" that begin with en.
The first step is to determine the name of the Ethernet interface to be configured. You can use the iplink command or ipa as follows:
international profession certification association
This command will print a list of all available network interfaces. In this case, the name of the interface is eno 1:
1:lo:LOOPBACK，UP，LOWER _ UP & gtMTU 65536 qdiscnoqueuestatunknownggroupdefaultqlen 1000
Link/Loopback 00: 00: 00: 00: 00: 00 BRD 00: 00: 00: 00: 00: 00: 00.
inet 127 . 0 . 0 . 1/8 scope hostlo
valid _ lftforever preferred _ lftforever
inet 6:: 1/ 128 scope host
valid _ lftforever preferred _ lftforever
2: Hmm