viewgroup

Welcome to learn this section, the previous sections we have learned several other custom controls, the audio bar of the Andriod custom control and the creation of a andriod custom control can be reused. Students who have not yet learned, please go to study, because this section will use the content described in the previous sections.Before learning something new, let's start by figuring out two questions:1. What is ViewGroup?

http://blog.csdn.net/guolin_blog/article/details/9153747http://blog.csdn.net/lmj623565791/article/details/39102591The last article on the view of the event distribution, this article is mainly ViewGroupFirst, let's explore, what is ViewGroup? What is the difference between it and a normal view?As the name implies, ViewGroup is a set of view that contains a lot of sub-view and sub-vewgroup, which is the pare

You are welcome to learn this section and we have learned several other custom controls in the previous sections. is the andriod of the custom control and the creation of the Andriod custom control. Composite controls that can be reused the students who have not yet learned please go to study, as this section will use the content described in the previous sections. Before we learn new content, let's find out two things: 1. What is ViewGroup?

height. LayoutThe layout process is very simple for the view class, and the same view exposes us to the OnLayout method protected void OnLayout (Boolean changed, int left, int. top, int right, int bottom) { } Because we're talking about view now, no child view needs to be sorted, so this step actually doesn't require extra work. To insert a sentence, for the ViewGroup class, OnLayout method, we need to set all the size of the child vie

Another new chapter has been opened. Haha, what I learned last time was to inherit the View. The personal feeling of inheriting the View is not so perfect. What I do is always want to make everything perfect, but there is no perfect world. This is the ViewGroup study. To tell the truth, I personally feel that the functions of this class are still very powerful. Here we only provide the most basic things. Well, let's continue to study it. The road is l

Reprint please indicate the original address: simple and flexible to solve the problem of gesture conflict caused by viewgroup nestingThis is followed by an Android drop-down refresh pull-up loading a variety of application scenarios Super Big Broadcast (on), here is how to easily and flexibly solve the viewgroup nested gesture conflict problem. Although this is only a case of Viewpager, it provides a gener

During development, there are sometimes some requirements. Simply using the layout and controls provided by the system does not meet our development needs. Therefore, you can customize the layout (viewgroup) by yourself) and controls (view. Here, I will use a simple example to explain the basic process of custom viewgroup, hoping to help those who do not know the process. First, we want to implement the fol

Android custom control Series 6: Custom ViewGroup (1) ViewPager effect, viewgroupviewpager Today, we start a new Android custom component journey. The following content describes how to customize a ViewGoup. We have learned about the basic syntax of custom view through several blog posts, if you have any questions, refer to the following topic: Android custom controls. This is also an example to illustrate how to customize a

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

Android custom ViewGroup and androidviewgroup There are two types of views: View and ViewGroup. ViewGroup is a subclass of View. ViewGroup can contain all views (including ViewGroup). View can only be self-described and cannot contain other views. However, the

In Android, the focus acquisition and event is similar, there is a distribution mechanism, generally view tree upper node viewgroup than the underlying node's view has a higher priority to get focus, which is reflected in the ViewGroup has a property Descendantfocusability can be used to control the priority of focus acquisition. There are three values for this property: Beforedescendants:viewgroup

In development, there are some requirements that can sometimes be met. The layout and control system not only provides the use to meet our development, so this time on the line, usually your own custom layout (ViewGroup) and control (View) that. I am here, we will use a simple example, when they explain their definition viewgroup basic flow, I hope to help friends do not understand the process.First, we wan

The View class is the parent class of ViewGroup. ViewGroup has all the features of View. ViewGroup is mainly used to act as the View container and manage the View as its own child, of course, the child can also be of the ViewGroup type. The View class is generally used for drawing operations. It overrides its onDraw me

This article and you make a rounded rectangular menu with arrows, probably long below this appearance: The top arrow is required to align the menu anchor, the menu item is pressed against the color, and the background color and press color are configurable.The easiest thing to do is to get UX to put a picture of a triangle up, but then think that this is not too low, and the different resolution is not very good fit, simply customize a viewgroup ba

Respect originality: Http://blog.csdn.net/yuanzeyao/article/details/40264433 I haven't written any articles for a long time. Now I can summarize some knowledge over the weekend to help me better understand it. Today I will learn how to implement custom viewgroup.Commonly used layout, framelayout, and relativelayout layout in Android... These la s are inherited from viewgroup. With these la S, we can almost develop all interfaces in Android. However, f

Basic tutorial for Android-2.1 concepts of View and ViewGroup, androidviewgroupBasic tutorial for Android-2.1 concepts of View and ViewGroup Tags (separated by spaces): basic Android tutorialThis section introduces: Let's say goodbye to Chapter 1 and welcome to Chapter 2-detailed explanation of the UI (User Interface) component in Android,In this section, we will learn the parent Class View and

Android Basics Getting Started Tutorial--2.1 view vs. ViewGroup concepttags (space delimited): Android Basics Getting Started TutorialIntroduction to this section:Farewell to the first chapter, usher in the second chapter--android UI (User Interface) component of the detailed,And what we're going to learn in this section is the parent view and ViewGroup class for all the controls! Whim, direct translation o

One view: the rendering process of viewgroupViewgroup painting involves two steps: 1. Measure 2. LayoutCall the callback function in these two steps: 1. onmeasure () 2. onlayout ()1. onmeasure () in this function, viewgroup will accept the size of the childview request, and store it in childview through the measure (newwidthmeasurespec, heightmeasurespec) function of childview, so that getmeasuredwidth () of childview ()The value of andgetmeasuredheig

Original address: https://developer.android.com/training/gestures/viewgroup.htmlHandle touch events in ViewGroup with extreme caution, because there are many sub-view in ViewGroup, and these sub-view are different targets for different touch events. Make sure that each view receives the corresponding touch event correctly.Interception of touch events in ViewGroupThe Onintercepttouchevent () method is called

are passed in layers, that is, the event is first passed to the root view Decorview, which is then passed down and eventually uploaded to the target view. If you add a custom viewgroup to the root view Decorview and its child view linearlayout, we can intercept the event in a custom ViewGroup to determine whether to turn off the soft keyboard. Now that you want to add a custom