Event distribution is a very important mechanism in Android and is the basis for user interaction with the interface. This article will create a flowchart of event distribution by using the example print log, making it easier for everyone to understand the Android event distribution mechanism.
First, the necessary basic knowledge
1. Related methods
The methods
A brief description of the C ++ object model: Memory Distribution of C ++ objects and a brief description of the Object ModelIn C ++, there are two types of member variables: static and non-static. There are three member functions: static, non-static, and virtual. So how do they affect the distribution of C ++ objects in the memory? What is the memory distribution
This section describes one of the core knowledge points of view: the event distribution mechanism. Event distribution mechanism is not only the core knowledge point is more difficult, many beginners and even middle-level developers face this problem will be confused. In addition, the view of another big problem of sliding conflict, its solution is the theoretical basis of the event
Reprint Please specify source: http://blog.csdn.net/chziroy/article/details/44401615To understand the Android event distribution mechanism, first of all have to understand a few concepts, but also as a summary, if temporarily do not understand it is OK, this article will explain these questions.1, click on the screen, first the event's delivery starts with the activity's Dispatchtouchevent () method.2, about the Android event
The distribution and distribution trend of data analysis data of the same dimension should be reflected by making histogram and normal distribution curve.For example: The daily income of all employees is known and the distribution of employee income is analyzed.(51.7, 50.6,57.9,56.9,56.7,56.7,55.3,56.1,53.7,54.5,56.9,5
"The natural graphs commonly found in the Real-world have, highly skewed Power-law degree distributios ..." is the beginning of the paper, it says. The solution is probably, and then the investigation was known. Power-law degree Distributios is originally a description of the distribution of nodes in the network map, Chinese can be called "Power law degree distribution."
Wikipedia entry "Complex network" i
Android development, touch control everywhere. For some students do not see the source code, how many of this will have some doubts. View event distribution mechanism, not only in doing business requirements will encounter these problems, in some interview written questions are often asked, it is commonplace. I've also seen a lot of people write this article, not too long-winded is too vague, there are some in the details of the dispute is also writte
The three-level distribution system is actually a mall, but the sales model is dominated by the three-level distribution model. What should I pay attention to when developing a third-level distribution system on the product details page?
Third-level distribution system development
1. required part of product details
May be the reason for the holiday or because of today's walk fell, I think my arm is particularly painful, typing is particularly uncomfortable, feel particularly sleepy, see a good long time probability of the problem I do not understand.Let's write and analyze. when n is very large p is very small, the two-item distribution C (N,K) =PK (1-p) n-k approximate to the usual when n≧10,p≦0.1, can be calculated by the Poisson formula approximation. The par
Reprint Please specify source: http://blog.csdn.net/chziroy/article/details/44401615To understand the Android event distribution mechanism, first of all have to understand a few concepts, but also as a summary, assuming that the temporary can not understand it is no harm, this article will explain the several problems.1, click on the screen, first the event's delivery starts from the activity's Dispatchtouchevent () method.2, about the Android event
In normal development, we often encounter events such as clicks and swipes. Sometimes there are a variety of sliding conflicts between different view. For example, if both the inside and outside of the layout can slide, then there will be a conflict. This time we need to understand the Android event distribution mechanism.IntroducedThe Android Touch event distribution process is done together in three impor
Have you ever wanted to build your own Linux distribution? Every Linux user wants to do one of their own distributions, at least once, in the process of using Linux. I am no exception, as a Linux rookie, I have also considered the development of a Linux distribution. The issue of developing a Linux distribution from scratch is called Linux from Scratch (LFS).
B
restore.Here are the popular learning methods, or the non-linear dimensionality reduction method, a branch of ML (more specifically, unsupervised learning). This article mainly talks about a popular data dimensionality reduction method T-sne, presented by Laurens Vander Maaten and Geoffrey Hinton (original article). The algorithm is successfully applied to many real datasets. Here, we deal with the handwritten digital recognition library mnist, using Python
There are only two protagonists in the touch event distribution: ViewGroup and view. The activity of the touch event is in fact called its internal viewgroup touch events, can be directly treated as viewgroup.
View in ViewGroup, ViewGroup can also be in other viewgroup, this time the internal ViewGroup as view to analyze.
There are three related events in ViewGroup: Onintercepttouchevent, Dispatchtouchevent, Ontouchevent. There are only two related
Terms:canonical Ensemble regular ensemble; partition function distribution functionsThe day before the review of statistical mechanics required basic mathematical physics background knowledge, today formally entered the first threshold of statistical mechanics. In the study of physical chemistry/chemical thermodynamics, you will hear the two concepts of "ensemble" and "sub-function" many times, in the absence of a deep study of statistical mechanics,
4G indoor distribution construction solution
How to Implement indoor coverage has become the biggest challenge facing operators in the 4G era. Compared with 3G networks, the 4G indoor distribution system pays more attention to refined indoor coverage. system indicators should not only focus on field coverage, but also on capacity, signal quality, switching, frequency, and interference, and network construc
http://www.cnblogs.com/jerry19880126/p/3616999.html#undefinedBooks on the inheritance of the relevant chapters to the end of this, here is the C + + memory distribution structure, let us see how the compiler handles the memory distribution of the class members, especially in the case of inheritance, virtual functions exist.工欲善其事, its prerequisite, let's start with the Visual Studio Tools, like this step-by-
Android Touch gesture distribution and androidtouch gesture
In the Touch distribution in android, we often see ACTION_DOWN-> ACTION_MOVE-> ACTION_UP. When we don't know how it is distributed, we always feel confused, therefore, it is necessary to understand its overall distribution process, so it is necessary to keep a good record.
Event
Android event Distribution
Methods related to Touch events in Android include dispatchTouchEvent (MotionEvent ev), onInterceptTouchEvent (MotionEvent ev), and onTouchEvent (MotionEvent ev) From this table, we can see that ViewGroup and its subclass can respond to the three methods related to Touch events, while Activity does not respond to onInterceptTouchEvent (MotionEvent ev), that is, event interception. In addition, you must note that the View res
IntroducedPrevious blog responsibility chain/Responsibility chain model (Chain of Responsibility) analytical understanding and application in AndroidThis paper introduces the responsibility chain model as the basis of understanding the view event distribution mechanism.To apply the structural analysis of the responsibility chain pattern, when our fingers are clicked or slid on the screen, it is an event, each view or viewgroup that is displayed on the
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