android viewgroup

The method invocation process in Title view and ViewGroup is summarized as follows:1. First, the Activity oncreate and initializes the view2. Then, after the Activity Onresume calls the view's Onattachedtowindow, it often does the initialization work in the Onattachedtowindow method, such as registering some broadcasts, starting the animation, etc...3. Next, if the background is set, call OnDraw, and then call Dispatchdraw if it is viewgroup.Descripti

1. Overview first onThis is probably the effect, first talk about the implementation of ideas 1. First we want to get the URL (network) or ID, path (local) of the image, bind the view to the data, Write our own Adapter2. Customizing the layout of the view to be displayed, and handling touch events for logical processing 3. Write Toggle Callback2. Implementation 1) custom adapter Here I downloaded the network picture, also can put the picture in res set ImageView contentpublic class Dragpageviewa

Use the holidays to summarize the previous things. Let's start with a simple one.The effect is as follows: I made a screenshot animation. The ratio is a bit incorrect. Let's take a look. The entire window consists of three parts. The main interface in the middle is a list, the slide interface on the left is a menu, and the slide interface on the right is an edit box. The left menu is half screen, and the right menu is full screen.In the end, I only used the sliding out window on the left, but I

One, custom ViewGroup:1. Choice of construction method:Get some values (some properties or custom properties) that you need to usePublic Custonviewgroup (Context context) {This (context, null);}Public Custonviewgroup (context context, AttributeSet Attrs) {This (context, attrs, 0);}Attrs declared in the layout file, the above two construction methods cannot have custom propertiesPublic Custonviewgroup (context context, AttributeSet attrs, int defstylea

On the basis of custom ViewGroup (5): http://www.jb51.net/article/100639.htm, add the use of adapter to fit the data, which is more convenient, just use the adapter adapter data and cannot be updated. Package com.example.libingyuan.horizontallistview.ScrollViewGroup; Import Android.content.Context; Import Android.util.AttributeSet; Import Android.util.DisplayMetrics; Import Android.util.Log; Import Android.view.GestureDetector; Import android.vi

Last article "Custom ViewGroup (2)" Address: http://www.jb51.net/article/100610.htm Code Package com.example.libingyuan.horizontallistview.ScrollViewGroup; Import Android.content.Context; Import Android.util.AttributeSet; Import Android.util.DisplayMetrics; Import android.view.MotionEvent; Import Android.view.View; Import Android.view.ViewGroup; Import Android.view.WindowManager; Import Android.widget.Scroller; /** * Custom

Recently learning to customize ViewGroup, my goal is to make a ListView that you want to scroll, use adapter to populate the data, and use Adapter.notifydatasetchanged () to update the data. But eat not a fat one (I eat like this but a few years of accumulation of ~ ~ ~ ~ ~ ~ ~ ~ ~), we step by step, this note first write a horizontal layout. Code: Package com.example.libingyuan.horizontallistview.ScrollViewGroup; Import Android.content.Context

Rewrite view:The view class is generally used for drawing operations, overriding its OnDraw method, but it can not contain other components, and there is no AddView (view view) method.Rewrite viewgroup:ViewGroup is a component container that can contain any component, but must override OnLayout (Boolean changed,int l,int t,int r,int B) and onmesure (int widthmesurespec,int Heightmesurespec) method. Otherwise, the add component in ViewGroup is not disp

Create a linearlayout in the activity, create a scrollhorizon object (scrollhorizon inherited from viewgroup), and call the createlayout function in scrollhorizon to load the myview (inherited from view) object, call the deleteallview function to delete all views. ScrollhorizonCode: Public class scrollhorizon extends viewgroup {private context; Public scrollhorizon (context) {super (context); this. co

adapter directly, for the sake of completeness of the introduction of the interface is attached here:Public interface Idockingadapterdatasource { int getgroupcount (); int getchildcount (int groupposition); Object getgroup (int groupposition); Object getchild (int groupposition, int childposition); View Getgroupview (int groupposition, Boolean isexpanded, View Convertview, ViewGroup parent); View Getchildview (int groupposition, int

Getchilddrawingorder and Ischildrendrawingorderenabled () are methods that belong to ViewGroup.The Getchilddrawingorder is used to return the index of the current iteration child view. That is, gets the view index that is currently being drawn. If you need to change the order in which the ViewGroup child views are drawn, you need to overload this method.and NeedCall FirstsetChildrenDrawingOrderEnabled(boolean)method to enable the sub-view sorting feat

Mainactivity as follows:Package Cc.ac;import Android.os.bundle;import Android.view.view;import android.view.view.onclicklistener;import Android.widget.button;import Android.widget.linearlayout;import android.app.activity;/** * Demo Description: * Call the Scrollto () and Scrollby () methods on ViewGroup. * * Verification Theory: * If a viewgroup (such as xxxlayout here) calls Scrollto (by) * Its content (th

This effect is the same as the previous: Http://www.jb51.net/article/100638.htm effect is the same, but no longer write code in the Ontouchevent, Instead of using the system's own class Gesturedetector to monitor gestures and slide events and so on, it has built-in sliding, click, long press events, and there is a quick slide, more convenient, than the details of their own write better processing. Code: Package com.example.libingyuan.horizontallistview.ScrollViewGroup; Import Android.conte

Define your own ViewGroup and your own ViewGroup 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

Custom ViewGroup supports infinite loop page turning (Response callback event) and viewgroup callback If you like my blog, please pay attention to my Weibo, please click here (http://weibo.com/kifile), thank you Mark the source for reprinting. Thank you again. ######################################## ############################### Custom ViewGroup supports infi

ViewGroup enables you to scroll up or down or left and right to run the lantern. viewgroup First: Code: Package com. example. scrolltextview; import java. util. hashMap; import java. util. iterator; import java. util. map; import android. content. context; import android. content. res. typedArray; import

Custom Controls --- inherit the ViewGroup class method (step 1 of step 1 Effect ---- drag the image left and right), and viewgroup Step 2 ----------------------- The following effect is just the beginning of the overall effect-(currently, you can only drag the image left and right) --- continue to update the blog ------------------------- Configuration File Activity_main.xml (not explained, there is only o

Custom ViewGroup for waterfall flow effect, viewgroup waterfall Today's Valentine's Day, I read books and write code at home ~ I have been away with my girlfriend for more than four years, and I am in a bad mood. It is so sad to sit alone in the house that the holiday schedule will be yellow. But fortunately, I am a person who can control my emotions well. It's also good to shift my attention and read and w

Add ProgressBar and ViewGroup through viewgroup of Activity ProgressBar is a common component. we can implement a progressBar in multiple ways. One way is to place a bar through an Activity window, as we all know in android that the link is Activity-> Window-> View [ViewGroup], we can load a progressBar through the win

Baidu know: Http://zhidao.baidu.com/link?url=B5MFOzDlww8soYqr5CL5FldH4sXD6eumS1XTRn8XEh8gu4mKjQdPkJSLIBt7u_ Xtf7jcrjrjegwiqcweq1z-nqThe UI interface for Android is made up of a combination of view and ViewGroup and their derived classes. where view is the base class for all UI components, ViewGroup is the container that holds the components, which itself is deriv