viewgroup

myProvinceTextViewLP = null;Cursor cursor = null;Final Spinner spinner = null;Switch (item. getItemId ()){Case MENU_ADD:MyCityRelativeLayout = new RelativeLayout (CityManagerActivity. this );// Set the relative layout width and heightMyCityRelativeLayout. setLayoutParams (new RelativeLayout. LayoutParams (ViewGroup. LayoutParams. WRAP_CONTENT, ViewGroup. LayoutParams. WRAP_CONTENT ));// Set the components

There are too many mobile phone devices and the resolution is different. Most methods to adapt to the font on the Internet are to define the values320 × 480 or value-hdpi method for processing.The first type is miserable. The resolutions of many devices are different. Do you need to define each type?Using the second method has no effect on tablets. Finally, the Code method is convenient and convenient... [Java]// Print and set the fontPublic static void changeViewSize (

Source: Viewdraghelper is a file under the V4 package.We sometimes get a headache when customizing ViewGroup, and a large part of this is because event handling is too cumbersome, requiring a large number of member variables, a variety of judgments, and so on.Google also felt the trouble, so Viewdraghelper appeared, Viewdraghelper function in the end what is it? In the literal sense, it is the Help class for view dragging, in short, the amount of code

It is easy to dynamically generate interfaces. First, you need to configure the layout of this interface, including absolutelayout, relativelayout, and others. Then you can add the control in it: Public void oncreate (bundle savedinstancestate ){ Super. oncreate (savedinstancestate ); // Determine the page layout Absolutelayout abslayout = new absolutelayout (this ); Setcontentview (abslayout ); // Create a button Button btn1 = new button (this ); Btn1.settext (\ "this is a button \"); Btn1.seti

. ListView. layoutChildren (ListView. java: 1600)12-19 17:32:41. 822: E/AndroidRuntime (1894): at android. widget. AbsListView. onLayout (AbsListView. java: 2102)12-19 17:32:41. 822: E/AndroidRuntime (1894): at android. view. View. layout (View. java: 13754)12-19 17:32:41. 822: E/AndroidRuntime (1894): at android. view. ViewGroup. layout (ViewGroup. java: 4362)12-19 17:32:41. 822: E/AndroidRuntime (1894): a

. graphics. canvas; import android. util. attributeSet; import android. view. motionEvent; import android. view. view; import android. view. viewGroup; import android. widget. scroller; import android. widget. toast;/*** Scroller principle: * to move the content of a View or ViewGroup, we often use scrollTo () and scrollBy () methods. * However, the two methods are executed quickly, and it feels stiff to co

ViewGroup subclass needs to override onMeasure to traverse and measure the size of its child views. The measure method is of the final type and cannot be overwritten, the onMeasure method must be rewritten. The whole measurement process is to recursively apply a View to the View tree. Once the measurement is completed, you can use getMeasuredWidth () and getMeasuredHeight () to obtain the custom ViewGroup

Android event distribution Learning application-image carousel implementation In the previous article, I wrote a learning note on the Android event distribution mechanism. Next we will use an instance application to understand the Android event distribution mechanism. Here we will implement the carousel function for an image, and finally implement automatic carousel for the film by the way. Our image carousel is encapsulated in a ViewGroup. When we pe

Activity, and each row in the stack is a Fragment transaction. With this stack, You can execute the Fragment transaction in reverse direction, so that you can support the "return" Key (navigation backward) at the Fragment level ). When adding a Fragment to an Activity, it must be placed in ViewGroup control and define its own Fragment interface. You can declare the Fragment in the layout xml file. The element is However, Fragment does not have to be

Implementation of the stream layout of popular tags in Android, android tag Layout I. Overview:In daily app usage, we will see popular labels and other auto-wrapping stream la s in android apps. Today, let's take a look at how Customize a stream layout similar to popular labels (the source code is downloaded at the end of the article below) Similar custom layout. Next we will introduce in detail the application characteristics of stream layout and the technical points used: 1. Streaming Layout f

Animations for layout changes of viewgroups objects The property animation system provides an easy way to process the animation changes of viewgroup objects as well as view objects. Layouttransition class is used to process layout changes in viewgroup. When you call the setvisibility () method of a view object, set the gone constant of the view, or add the view object to the

OverviewIn the previous article, the drawing process of the Android view (top)--view The measure process of the view is described in detail. For the entire process of drawing the view, after measuring the size of the view, you start to determine the location of the view and draw it to the screen. The layout and draw process of the view. So take a look at how these two processes are implemented.the layout process of the viewThe drawing flow of view mentioned above starts with the Performtraversal

to the root node.analysis of event interception mechanismAndroid's view structure is a tree structure, the view can be placed in a viewgroup inside, the ViewGroup is placed in another viewgroup inside, and even may continue to nest, layer by layer stacked up. Touch events on one, who should be assigned? The same event, both the child view and the parent

style of the form TypedArray a = Getwindowstyle ();Omit a lot of extraneous codeInflate the window decor.int Layoutresource;int features = Getlocalfeatures ();//populated with the style and feature attribute Layoutresource (is a layout id) View in = Mlayoutinflater.inflate (Lay Outresource, null); //insert top-level layout Decorview Decor.addview (in, new Viewgroup.layoutparams (Match_parent, match_parent)); Mcontentroot = (viewgroup) in; //find our

, this is not only Android, including iOS. The most common and most consistent page layout for Android development is: The XML file that defines the page layout in the Android Project project, defined in the subdirectory layout in the Res directory. Android defines interface elements hierarchically: The View object encapsulates the most basic interface elements, such as buttons (button), input box (textfileds), and so on; ViewGroup is the container

Mainactivity as follows:Package Cn.c;import android.os.bundle;import Android.app.activity;import android.view.motionevent;/** * Demo Description: * Analyze the Android event distribution and processing mechanism * * Summary: * 1 ViewGroup inherited from the view * event is passed in the direction: from the outermost (Activity) to the most inner (a view) * Event The consumption direction is: From the most inner layer (a view) passed to Outermost (Act

while the adapter displays the height entry. When set to False, the list uses only the number of entries in the adapter and the visible entries on the screen to determine the properties of the scroll bar. Android:stackfrombottom//sets whether the GridView and ListView display content starting at the bottom. android:textfilterenabled//when set to True, the list filters the results to the user type. The premise is that the adapter of this list must support the Filterable interface. Android:transc

The viewstructure design of Android system also uses the combination mode, that is, view as the base class for all the graphs, viewgroup view inheritance into the views container class, thus obtaining the basic structure of the Views section-tree structure view defines the basic operation of the drawingThe basic operation is done by three functions: measure (), layout (), Draw (), and its interior contains onmeasure (), OnLayout (), OnDraw () three su

function. If you cannot find the updateincallbackground () function, try to find a setbackgroundresource () method to redraw the background of mmainframe. 2) The next incoming call will be followed by a large sticker used by the phone.---------Yes. This should be cleared at the end of the call. This is simple. Modify incallscreen. smali and find .method private delayedCleanupAfterDisconnect()V This method. Then find the return-void line of code, and insert the following code in several lines ab

If you have read some of the following articles and are familiar with them, you don't have to think about them. I have intercepted ^ 0 ^, And then I have made up some details to facilitate understanding. (Note: The following is a combination of two articles on the Internet. I just added some changes)Concepts 1. onintercepttouchevent () is used to process events (the important onintercepttouchevent event is transmitted from the parent control to the Child control until there is an interception or