本文主要讲的是绑定器的作用，在Android系统中，绑定器帮助提供两个进程之间基于消息的通信通道。这些被认为是由以下部分组成的(Crowell和Prakash, 2015):内核级的驱动程序，用于实现整个进程边界的通信。绑定器库，用于使用技术元素在内核级与驱动程序通信。为使用活页夹库而在上层进行摘要。在概念上，Binder以采用经典的客户端和服务器架构而闻名。任何客户端都可以考虑通过binder框架跨远程服务器发送事务，同时检索整个响应(Glezer和Weiss, 2012)。本篇英国代写文章由英国论文通AssignmentPass辅导网整理，供大家参考阅读。
In Android system, Binders help in providing message based channel of communication among the two processes. These are known to be consisting of the following (Crowell and Prakash, 2015):A driver at kernel level for the achievement of communication throughout process boundaries.A library of binder for using technical elements for communicating with the driver at kernel level.Abstracts at upper level for the utilization of binder library. In conceptual terms, Binder is known for taking a classical architecture of client and server. Any client can consider sending a transaction across the remote server through the framework of binder while retrieving the overall response (Glezer and Weiss, 2012).
There are marshalled parameters of the transaction within a Parcel object having a container of data that can be serialized. There is sending of Parcel object by the Binder driver and the delivery is made across the server.
The server will end up de-serializing the borders of Parcel object, processing the overall transaction, and returning the response similarly to the client. This helps the client in achieving RPC and invoking methods related to local remote servers (Gu, 2014). This RPC based on binder is among the most frequent elements in Android for IPC while it helps in underpinning to implement majority of the system services.
The communication of binder framework incorporates a model of client server. Any client will consider the initiation of communication while waiting to receive a response from the server. The framework of binder utilizes a proxy from client side for the overall scope of communication (Kim and Cha, 2013). On the side of server, there is existence of thread pool to work on the basis of requests.
As depicted in the figure below, the client is process A, while holding the overall proxy object for implementing communication with the kernel driver of binder. Process B is the process of server consisting of several threads of Binder. The Binder framework helps in spawning different threads for handling each and every incoming request until reaching a maximum defined number of threads. The objects of proxy communicate with the Binder driver for delivering message across the destined objects (Lie, 2012).
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