Android player path: java-layer Binder and Android binder
Many people refer to the proxy mode when talking about Binder. There are a lot of people, and there is little understanding of the essence. This article analyzes the design objectives, design ideas, and design defects of the java-layer BInder from the perspectiv
In Checkservice's investigation we know that the client requests the service name to ServiceManager, ServiceManager traverses the local list based on the service name, and finds a matching handle to return to the client. This handle is clearly registered by the server, what is this handle? To understand this problem first, we must study how the server and ServiceManager work together to complete a addservice operation. We start with the service-side code. Testservice.cpp:30 int main () {SP p
Before writing an article about the aidl of IPC, see the Aidl of Android IPC for details. Let's introduce another kind of ipc-messenger today.I. Overview.First Look at Messenger introduction,Reference to a Handler, which others can with send messages to it. This allows for the implementation of message-based communication across processes, by creating a Messenger
one-way communication and multi-application multi-process two-way communication respectively.
Messenger Introduction
Messenger is a way to implement a single request by using a message to communicate across processes, which is its pros and cons . Its underlying implementation is aidl (I will elaborate on the next chapter). Messenger's advantages are: Based on message, easy to use, support callback way, t
mechanism is not unique to Android, any operating system requires an IPC mechanism, such as Linux can be named pipes, shared main memory, semaphores, sockets, Message Queuing and other ways to implement the IPC mechanism, Android is based on the Linux kernel, But wirelessly's IPC mechanism is not exactly the same as Linux, such as the binder mechanism is a feature of the IPC in Android, this IPC mechanism does not exist in Linux. This blog will expla
5. Binder statementDuring the entire binder communication process, we can find that the binder exists in the following parts of the system:
· Application processes: Server Processes and Client Processes
· Binder DRIVER: server and client have different expressions
· Data Transmission: Since the
Users who know the computer know that in Windows XP, the Messenger service is the "messenger" in the server that transmits the net send and alerter (alarms) between the client and the server. Let's look at how the WinXP system uses the Messenger service to send information over the LAN.
The specific methods are as follows:
Click Start, Run, and then enter CMD t
Jitsi is an open-source, multi-platform audio/video network telephone and instant messaging software written in Java. It supports some of the most popular instant messaging and telecommunications protocols, such as SIP, Jabber/XMPP (which supports Facebook and Google Talk), AIM, ICQ, MSN, Yahoo! Messenger.
Jitsi is also considered a good replacement for Skype.
Install Jitsi
Press Ctrl + Alt + T on the keyboard to open the terminal. Enter the followin
, The binder that returns Messenger at Onbind (called the Getbinder () method of Messenger, which returns a IBinder object that the client will use as a parameter to create a Messenger object to communicate with the server).Messenger Use steps1. The server implements a handl
use of Messengermessenger can be translated as a messenger, through which you can pass the message object in different processes, in the message to put the data to be passed, it is easy to achieve the process of data transfer. Messenger is a lightweight IPC scheme that implements the Parcelable interface and the underlying implementation is aidl. This can be seen from the way it is constructed: publicMe
references to objects, you can use the proxy mode of smart guidance.BinderBinder is an interface form of IPC. Here is an example of the interface generated by the. aidl file that we used in the application development process. The use of aidl needs to be explained in the official Android documentation above:
The necessary condition for using aidl is that your service wants to be called by other clients from different applications for IPC and wants to handle multithreading in your servi
Messenger between Android processes and communication between android Processes
I 've been reading binder over the past two days. I 've accidentally seen something like messenger in the document. I think it's quite interesting. I 'd like to share it with you.
When we talk about inter-process communication, we will think of AIDL. In fact, both
5 Binder statement
During the entire Binder communication process, we can find that the Binder exists in the following parts of the system:
· Application processes: Server Processes and Client Processes
· Binder DRIVER: Server and Client have different expressions
· Data Transmission: Since the
1. IntroductionMessenger, as the name implies, is the messenger, through which you can pass message objects in different processes, and you can easily implement the cross-process of data by putting the incoming messages into the message that we need. Messenger is a lightweight IPC scheme whose underlying implementation is aidl.Messenger is very simple to use, it encapsulates the aidl process, and because it
Original address: http://blog.csdn.net/universus/article/details/6211589Binder is one of the inter-process communication (IPC) modes of Android systems. The IPC means of interprocess communication already owned by Linux include (Internet process Connection): pipe, Signal (Signal) and Trace (trace), socket (socket), Message queue (message), Shared memory (Share memories) and semaphores (Semaphore). This article details the advantages of binder as the m
MessengerUsing Messenger, you can pass data between processes, enabling one-to-many processing. Its internal implementation is also based on the Aidl file, this aidl located in: Frameworks/base/core/java/android/os/imessenger.aidl.The service side communicates with the client, mainly in the transmission message to do the processing, lets the Message.replyto point to the client Messenger, but the
I. Overview of the binder mechanism
In Android development, many times we need to use interprocess communication, so-called interprocess communication, to achieve interprocess communication mechanism there are many kinds of, such as socket, pipe, and so on, Android in the way of communication between the main three kinds:
1. Standard Linux Kernel IPC interface;
2. Standard D-bus interface;
3.Binder inte
I. Overview of the binder mechanismIn Android development, many times we need to use inter-process communication, so-called interprocess communication, the mechanism to achieve inter-process communication, such as sockets, pipes, etc., there are three ways to communicate between processes in Android:1. Standard Linux Kernel IPC interface;2. Standard D-bus interface;3.Binder interface.The
In the previous article talking about Service Manager as the path of Binder daemon of the Android interprocess communication (IPC) mechanism, this paper introduces how Service Manager becomes the daemon of binder mechanism. As a daemon, Service Manager's job is, of course, to serve the server and the client. So how does server and client get a Service Manager interface to enjoy the services it provides? Thi
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