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1. Overview Recently have been with interns to do projects, found that they have not written a blog for a long time, these days update will be more frequent, QQ today to find QQ home menu sliding effect has changed, it can not help the evening to realize it! 2. Realize 2.1. A variety of ways to achieve 2.1.1 Custom ViewGroup to handle its Ontouch events 2.1.2 Framelayout + gesture Processing class Ge
LinearLayout organizes views into one row or column. A child view can be arranged vertically or horizontally. To see how LinearLayout works, consider the typical mail.xml file first. In Main.xnl, you can see that the root node element is Each view and viewgroup have some common attributes, some examples: Property Describe Layout_width Specify the width of view or ViewGroup
This article is just looking at the translation and understanding of official help documents to make it easier for me to see them later.What is the layout resource file? Layouts an XML file that defines the layout of an activity or component.It generally looks like this:XML version= "1.0" encoding= "Utf-8"?>ViewGroupxmlns:android= "Http://schemas.android.com/apk/res/android"Android:id= "@[+][package:]id/resource_name"Android:layout_height=["Dimension"| "Fill_parent" | "Wrap_content"] android:lay
The layout is an activity structure for the user interface. It defines the layout structure and holds all elements displayed to the user. You can use either of the following methods to declare your layout: 1. Declare the UI element in the XML file. Android provides a simple XML vocabulary that corresponds to the View class and subclass. For example, widget components and layout. 2. instantiate layout elements at runtime. Your application can program to create view and
components for Android apps are placed in the Android.widget package and its child packages, Android.view packages, and their child packages, and you can see that all the UI components of the Android app inherit the view class. The view class is the basic unit of the user interface representation on the Android platform, and some subclasses of view are collectively referred to as widgets (tools), providing a complete implementation of UI objects such as text input boxes and buttons.A view, whic
First, the view drawing process frameworkThe drawing of the view is iterated from the top down. Decorview-->viewgroup (--->viewgroup)-->view, follow this process from top to bottom, measure (measurement), layout, Draw (draw).Second, measure processAs the name implies, the size of each control is measured.Call the measure () method, do some logical processing, and then call the Onmeasure () method, where you
Declaration Layout In an activity, your layout is the overall interface architecture. It defines the elements displayed to the user. You can declare your layout in two ways:@ Defined in XMLAndroid provides some intuitive view classes and their subclasses, such as widgets and layout.@ Create an instance at runtimeYour application can establish view or viewgroup through code and set their attributes.The android framework provides you with these two flex
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 distribution mechanism, there are three method
, from the parent View to the Child View. Each ViewGroup is responsible for ing all its child views, and the bottom View is responsible for ing itself. Detailed analysisThe measure process consistsmeasure(int, int)Method initiation, ordered measurement View from top to bottom. At the end of the measure process, each View stores its own Size and measurement specifications. The layout process is composedlayout(int, int, int, int)Method initiation is als
all called Context.getsystemservice (). Inflate methodThrough the SDK API documentation, you can know that the method has the following overload forms, the return value is the View object, as follows:public view inflate (int. resource, ViewGroup root) public view Inflate (Xmlpullparser parser, ViewGroup root) Publ IC View Inflate (Xmlpullparser parser, ViewGrou
For a "We never produce code, we are just the nature code of the porter," the Code farmer. The touch mechanism of Android is always ambiguous, especially when it is required that some custom controls and Androide's own controls (such as Viewpager,listview,scrollview) are highly nested together.It took a little time to comb and make a note. For a touch event from the user input to the actigvity to the outermost viewgroup in the sub view, the intermedia
In the previous article, we analyzed the event-handling process of view, and of course, the view here refers to the basic view. When the view receives a touch event, the Dispachetouchevent method is called first, and in this method the Ontouchlistener and ontouchevent are called for specific event handling. The Ontouchlistener takes precedence over ontouchevent. If the Ontouch method in Ontouchlistener returns True, subsequent ontouchevent are no longer executed. In Ontouchevent, specific event
There are only two main characters in touch event distribution: ViewGroup and view. The activity's touch event is actually called the ViewGroup touch event inside it, and can be treated directly as ViewGroup.View within the ViewGroup, ViewGroup can also be in other viewgroup
In my last Post, Android Deep move out of the definition control (i) describes how to customize the View control, this post mainly describes how to customize the ViewGroupWhat is ViewGroup?in the tree Chart of Android, the ViewGroup class derives from the familiar layout of LinearLayout, Relativelayout , and so on:Simply put, ViewGroup is actually the equivalent
1 overviewAndroid Custom View/viewgroup the steps are outlined below:1) custom attributes, 2) Selecting and setting the construction method, 3) overriding the Onmeasure () method, 4) overriding the OnDraw () method; 5) overriding the OnLayout () method; 6) Methods to rewrite other events (swipe to listen, etc.).2 Custom PropertiesAndroid custom properties are defined, used, and obtained in three steps.2.1 Defining custom PropertiesReference: htt
) Findviewbyid (R.id.edittext);21st}2223@Override24PublicvoidOnClick (View v) {25//TODO auto-generated Method StubShowDialog (0);//Date pop-up box27int sdkversion = secondactivity.This.getsdkversionnumber ();//Get System versionSystem.out.println ("sdkversion =" +Sdkversion);DatePicker DP =Finddatepicker ((ViewGroup) Mdialog.getwindow ()Getdecorview ());//Set Popup Date31if (DP! =Null) {32if (Sdkversion ) {((viewg
reprint Please indicate source: http://blog.csdn.net/lmj623565791/article/details/38171465, this article from: http://blog.csdn.net/lmj623565791/ article/details/381714651. Off-TopicI believe that everyone is not unfamiliar with layoutinflate, especially in the adapter GetView method of the ListView will appear basically, use the inflate method to load a layout for the ListView of each item layout. Inflate has three parameters that I understand when I first came to Android:Three parameters for i
layout we can be seen on the viewgroup of the various view (in fact, this implementation is more complex, here is a metaphor), So we can abstractly understand that Viewpager is equivalent to ViewGroup, and layout various view on this viewgroup, so in the next code, we need a custom viewgroup to achieve this effect. In
resources slide_in_right.xml, slide_out_right.xml, and styles. xml. styles is shown in the beginning. the code of the xml file is as follows: Next, we will create the BaseSwipeBackActivity base class. All the classes that implement gesture slide return inherit from it and it will be OK. If you do not need gesture slide, you don't need to inherit it. Now, let's look at the BaseSwipeBackActivity source code file, because the code comments are more detailed, I directly paste the code here
The inflate method of layoutinflater is often used in the Oncreateview method of fragment:[Java]View Plaincopy Public View Oncreateview (layoutinflater inflater, ViewGroup container, Bundle savedinstancestate) { There are four kinds of inflate methods in Layoutinflater, but these are the only two that we use frequently in our daily use:[Java]View Plaincopy Public View Inflate (int resource,
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