Android-binder (a) Learn fromExplore the art of Android developmentHttps://www.jianshu.com/p/bdef9e3178c972765136Discussion on binderBinder is an implementation class for the IBinder interface, and Inder is a bridge between the various managers and their service providers that connect the system, and binders are used primarily in service.Layering of Android SystemsAfter we understand the layering of Android, we have a clearer understanding of the IPC,
Many of the use of Windows NT/2000/XP and other operating systems of friends, recently received inexplicably, automatic pop-up "Messenger Service" window, its contents dazzling, there are illegal advertising, pornography dating, reactionary speech ..., and even the transfer work (Figure 1).
This occurs because the Windows NT/2000/XP operating system automatically starts its own messenger service when it is
Android is based on the Linux kernel, but it does not have rich UNIX-based inter-process communication, but is implemented based on openbinder.
The Binder Mechanism is driven by client, server, Service Manager, and binder.ProgramIt consists of four components: client, server, and service manager running in the user space, and the binder driver running in the kernel space. The Service Manager and
The knowledge point of the article basically comes from this connection, and then incorporates some of its own understanding: http://gityuan.com/2015/10/31/binder-prepare/1. Background knowledgeAndroid four-tier structure, the bottom is the Linux Kenel layer, that is, Android is actually based on Linux implementation, the basic implementation code is C language, and C is a structure-oriented language, rather than object-oriented languageSo, there are
This paper studies the implementation of binder service and wants to write a binder example.On the Internet and books have seen similar examples, according to write, found that they are not what they want, not quite in line with the style of the source code.Streamlined one from the binder service of the source code.Problems encountered:1, frameworks/native/includ
Model Binder is very simple in ASP. Simply put, the action method in your controller requires parameter data, which is included in the HTTP request, including the value on the form and the parameters in the URL. The function of Modelbinder is to replace the parameters in the values and URLs on these forms with objects, and then bind them to the action's arguments. I have simply drawn a diagram that will look more intuitive.in ASP. NET MVC you can writ
Tags: program memory footprint TAR requires BSP a basic local methodBinder connection pooling processing of multiple aidl files Pre-stated: I am also a beginner, so this article is from a beginner's point of view, if there are inappropriate places please leave a message to teach me, thank you. If the use of aidl and the binder mechanism do not understand, you can refer to my previous article, theAndroid Foundation-the beginner must know aidl on the
Msnp9 Protocol Analysis Report
1. Connection
The MSN Messenger protocol is built on TCP/IP. In addition to direct "point-to-point" communication between file transmission and voice chat, all other scenarios are performed through the server.
Logically, there are three types of servers with their respective roles:
Dispatch server (DS)-the server on which the client first connects. Allocates appropriate notification servers to clients. The domain name i
The communication mechanism of the Binder is simple, but some problems have been encountered in the use process. Finally, we have solved the problem. Here we will summarize the problems and share them with you:1. To use Binder for communication, first define the interface, and then implement the BnInterface *** on the server and the client BpInterface ***. In the end, one is to unpackage the parameters, and
Application scenarios that inherit the binder class to bind a service: the service is for your own use only (not third-partyProgramDevelopment ).
Note: This method is only applicable when the client and service are in the same program and process.
Implementation Method:
1. Create a binder instance in service:
This instance contains public methods that can be called by the client;
This instance returns
1. Binder (IPC)
Linux processes must communicate with each other to share resources and information. Therefore, the operating system kernel must provideInter-process communicationMechanism (IPC, inter-process communication ).
IPC Mechanism types: Named Pipe (name pipe), Message Queue (Message Queue), signal (signal), and Memory Sharing (share memory );
The communication between applications on Android terminals is almost invisible to these IPC communi
Service Manager is the manager of all services. Therefore, all servers (system servers) must register with it, and applications query corresponding services from service manager. Its implementation is located in the "frameworks/base/cmds/servicemanager \ service_manager.c" file.
int main(int argc, char **argv){ struct binder_state *bs; void *svcmgr = BINDER_SERVICE_MANAGER; bs = binder_open(128*1024); if (binder_become_context_manager(bs)) { LOGE("cannot become context manage
What is an anonymous service? Any service that does not have a register on the ServiceManager is anonymous service.Or take a sample example to see the code:status_t mediaplayer::setdatasource (int fd, int64_t offset, int64_t length) { status_t err = unknown_error; Const spIn the Bpmediaplayerservice. The implementation of Create is for example the following:Virtual spJump directly to the server Mediaplayerservice to see the real implementation of Create:SpFrom the code, we can see that ser
According to an article by foreign blog Steven Hollingsworth, Windows Live Messenger 9 has been emerging, which can be summarized as three points: new API, interworking with other instant messaging software, released at the end of 08 or early 09.Microsoft's team is working hard to achieve communication between Windows Live Messenger and aim, Gtalk, and ICQ users. In terms of IM, Yahoo!
MSN Messenger is still very useful, if willing to spend some time to set up the words, um. Instant Messaging should be a productivity boost, not a waste of time. Summarize my nine habits and hope to be able to help you. Of course, most of these habits can be ported directly to other tools, not necessarily on MSN Messenger.
First, use the common mailbox to register
Because MSN
Official explanation:
Http://help.cn.msn.com/kb/kb10010.html
An error 80048820 is reported when you log on to messenger.Error 80048820 due to Internet connection, firewall (a security feature designed to help protect computers from unauthorized external access. It can be a combination of hardware, software, or both), date and time settings, proxy settings, security settings, or SSL security issues and cannot be logged on. The server may be temporarily unavailable. To solve this problem, check
MSN MessengerSolution to login failure
Sorting: ch_builder
I don't know why. Suddenly, one day my MSN Messenger couldn't log in. I heard that MSN China is also being adjusted recently and I didn't care about it at first, but it won't work after a week, ask some friends who often use MSN Messenger. They said that MSN Messenger has been nor
Back in 2011, Microsoft formally acquired Skype.Skype and Messenger will then be integrated, and Messenger will be able to contact their messenger friends on Skype. By updating to Skype services, Messenger users can immediately send instant messages and video calls to their messeng
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