redirects, the address bar changes.Jump ExampleJumps need to use the Requestdispacher object, which can be obtained from HttpRequest or ServletContext.The following is a call to the Getrequestdispacher () method from the HttpRequest object to get the Requestdispacher and jump to the sample code:
protected void DoPost (HttpServletRequest req, HttpServletResponse resp){RequestDispatcher Rd = null;String region = Req.getparameter ("region");System. out. println (' Region: ' + region)
Activitymanagernative, the binder object of AMS is provided externally in a singleton mode, and Singleton is a single wrapper class that initializes the binder object by the Create method when it first calls its Get method.The role of Checkstartactivityresult is to check the results of initiating activity, which throws an error message when an activity cannot be started correctly.The order in which activity's initiation process passes between Activit
ORACLEASM is a database file storage management system officially provided by oracle. Compared with other file storage systems, AMS performs load balancing and Performance Optimization
Oracle asm (Automatic Storage Management System) is a database file storage management system officially provided by oracle. Compared with other file storage systems, AMS performs load balancing and performance optimization.
I,
Program entry
MIDlet, all
All the Java programs must inherit this class for initialization.
.
The Android program portal is
Activity Class. Next let's take a look at their lifecycles. J2-midlet
Lifecycle 1
,
StartApp
(Activity status) This method is called when the program starts to initialize resources required by the user. 2
,
PauseApp
(Paused) this API is called when a phone call receives a call. You can call this interface to stop or write operations on the thread. 3
,
DestroyApp
(Destruc
First, we learned that writing a mobile phone program is actually very simple. However, many people may not quite understand how to transfer the program to their mobile phones. If you don't believe it, try it. Whether you use a data cable or infrared Bluetooth, there is no way to get the programs on the computer to run on the mobile phone, nor to get the games on other people's mobile phones to run on their own mobile phones (normal data transmission is acceptable, that is, the program is not ac
ACCESS_NETWORK_STATE
ACCESS_WIFI_STATE
These system events are triggered earlier than BOOT_COMPLETED, so Trojans can certainly take precedence over text messages. Based on this confrontation, do we have to fight together with Trojans? Is there a better solution? The answer is yes. The most effective way to promote the development of science and technology is war. In this technological confrontation, it is also the most likely to produce new ideas and solutions.
The basic idea is that after th
. samplingProfilerIntegration. start (); registerZygoteSocket (); // 1. Create a socket for listening to the EventLog of the fork request sent by ams. writeEvent (LOG_BOOT_PROGRESS_PRELOAD_START, SystemClock. uptimeMillis (); preload (); // 2. Load classes and resources. EventLog will be analyzed in detail later. writeEvent (LOG_BOOT_PROGRESS_PRELOAD_END, SystemClock. uptimeMillis (); // Finis H profiling the zygote initialization. samplingProfilerInt
. samplingProfilerIntegration. start (); registerZygoteSocket (); // 1. Create a socket for listening to the EventLog of the fork request sent by ams. writeEvent (LOG_BOOT_PROGRESS_PRELOAD_START, SystemClock. uptimeMillis (); preload (); // 2. Load classes and resources. EventLog will be analyzed in detail later. writeEvent (LOG_BOOT_PROGRESS_PRELOAD_END, SystemClock. uptimeMillis (); // Finis H profiling the zygote initialization. samplingProfilerInt
How does one Android window be created?Preface
In WmS, a Window is not a Window class, but a View class. After WmS receives a user message, it needs to send the message to the window. In fact, the View class cannot directly accept the transmitted message, but the IWindow class must be used to receive the message. The IWindow class is ViewRoot. W class, each W contains a View variable.
WmS does not care which application the window is. WmS determines which window is active according to certain ru
Android framework kernel tour
6.1 Framework framework
Framework defines the functions and interfaces of client and server components. In the following illustration, the example application example generally refers to the example. APK program.
The framework consists of three main parts: Server, client, and Linux driver.
6.1.1 Server
The server mainly contains two important classes: windowmanagerservice (WMS) and activitymanagerservice(AMS ). WMS assign
process points are summarized as follows:1. The broadcast recipient broadcastreceiver through the binder mechanism to the AMS (Activity Manager Service) registration;2. The broadcasting sender transmits the broadcast to AMS through the binder mechanism;3.AMS finds the broadcastreceiver that meet the appropriate conditions (intentfilter/permission, etc.) and send
clear. So the purpose of writing this whole blog is to deepen their knowledge, develop their own communication skills, and we learn together.Well, gossip less, we first solve the problem left behind in the last article, then there is time, I put this interview experience to write a blog, and we encourage each other.Let's look at ServiceManager in this article. Not much of it in the previous article, ServiceManager as a big housekeeper for Android services. It is still necessary for us to take a
I. Activitymanagerservice (AMS) Start-up process analysisStart Activitymanagerservice in SystemserverIf you want to know Systemserver startup process can read this article: Android Source Code Analysis (vi) systemserver processFrameworks\base\services\java\com\android\server\systemserver.java // Activity Manager runs the show. Tracebeginandslog ("startactivitymanager"); = Msystemservicemanager.startservice ( activ
In the Android application framework, Activitymanagerservice is a very important component, although the name is Activitymanagerservice, but through the previous blog introduction, we know that the four components are created with AMS to complete , not just the components in the application, but the Android application itself is the AMS startup. The AMS itself is
The following is the flow of source application to the content provider in Query Target application, where only the content provider is started.The picture above are the flow chart for how Content Providers started(1) Source APP Inform AMS to query the content provider with URL, in Blue;(2) AMS searched all registered content providers, once not found, it'll 1stStart the application whose androidmanifest ho
implementation process points are summarized as follows:1. The broadcast recipient broadcastreceiver through the binder mechanism to the AMS (Activity Manager Service) registration;2. The broadcasting sender transmits the broadcast to AMS through the binder mechanism;3.AMS finds the broadcastreceiver that meet the appropriate conditions (intentfilter/permission,
the zygote service: The zygote process is also called the incubation process, and all processes in the Android world are hatched from this process (fork ()), which is responsible for the creation and initiation of other processes in the application's framework layer.(Frameworks/base/cmds/app_process/app_main.cpp) (The script that launches zygote in Android L is not in the Init.rc file but has a separate init.zygote_xx.rc file to boot to support 64-bit operating systems)I. Zygote create Apprunti
broadcast
This broadcast is not discarded but stored in AMS after it is sent and distributed to the corresponding receiver through AMS (ActivityManagerService, when a new consumer request for AMS registration needs to be dynamically registered, if the consumer can receive this broadcast, AMS will immediately send this
This course solves the problem of how to understand the beginner's mind of Android architecture design and develop a featured product with Android system with deep customization and soft and hard integration capability.The course takes the five core of Android: HAL, Binder, Native service, Android service (and the example of AMs and WMS), the View system as the spindle, a one-time thorough mastery of the essence of Android.The reason why the developme
] = $ actionid;Return $ this-> send_request (Originate, $ parameters );}The following is the simple code of the server (I just implement automatic dialing for this file, and the other party will hear the hello world Voice after receiving the answer)Ami. php#! /Usr/bin/php-q
Include "phpagi-asmanager.php ";$ Ams = new AGI_AsteriskManager ();$ Ams-> AGI_AsteriskManager ("ami. conf ");$ Result = $
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