Mobile Develop

ContentProvider Optimization Improvements1. IndexSimply put, the index is like a book directory, catalogs can quickly find the number of pages, the database index can help to quickly find data, instead of full-table scan, the appropriate index can

Sometimes, our pages may contain layouts that are hidden by default, and hidden layouts are displayed when the user triggers a certain action. For example, we have an activity to display a list of friends, and when the user clicks "Import" in the

The display of each view/viewgroup goes through three processes:1, measure process (measuring the size of view display, position);2. Layout process (placement of view);3, Draw process (the previous article said through the canvas drawing to the

The main introduction of those Android is also good complete project, currently contains the project is mainly based on the project is interesting or the project layering standard is better.LinuxProject Address:

Starting with the JDK1.2 version, Java is dividing the object's references into four levels, giving the program more flexibility in controlling the object's life cycle. These four levels are high to low in order: Strong references, soft references,

The Android SDK Tools directory provides an observation layout tool, a level viewer (Hierarchy Viewer). The Hierarchy Viewer tool is a great layout optimization tool, and you can also learn the layout of others through it. Should be said to be a

If you add internal resources to frameworks and use similar forms to reference resources in Java code: COM.ANDROID.INTERNAL.R.LAYOUT.XXX, you need to frameworks/base/core/res/res/ Add the corresponding entry in the Value/symbols.xml.If it is a

Usually we write programs that are done under the pressure of the project plan, where the finished code can complete the specific business logic, but performance is not necessarily optimal. In general, good programmers constantly refactor the code

Tags that can be included: Common Properties:Android:processBy default, Android creates a separate process for each application, and all components run in the process, and the default process name is usually

Problem:The error prompts are as follows:Received Exception Processing F:/apjp/apjp_remote_appengine/war\web-inf/appengine-web.xmlCom.google.apphosting.utils.config.appengineconfigexception:appengine-web.xml does not contain

Get Pictures from GalleryStep: Step One:// activating the System Gallery app , Select a pictureIntent Intent = New Intent ();// Active Actions : Select an item from the data , Return is selectedintent.setaction (Intent. Action_pick );// set the

Load large picture to memory step: Step One:Obtain the width and height data of the product screen; [HD1]Step Two:Get the width height of the picture; [HD2]Step Three:Calculate the width and height ratio of screen and picture, and scale processing

Design app, because the screen is very small, in the PC page mountain can be placed in one of the content, in the app can not be put together.For example, there are many project attendance, need to pop up a panel, and then let the user choose, how

This article is an example of a listfragment that understands the usage of the more commonly used listfragment and the data transfer between the fragment by understanding the instance.Realize:The mainactivity includes 1 button+2 fragment (right two),

ObjectiveWelcome everyone I share and recommend useful code Snippets ~ ~StatementWelcome reprint, but please keep the original source of the article:Csdn:http://www.csdn.netRainy season o mo away: http://blog.csdn.net/luckkofBody[Description]How to

1, in the Drawable folder to create a new Border.xml file, and then paste the following code, you can define the different color border according to your own needs, or only unilateral, two or three sides, four edges, very good control. 2. Refer to

Presumably everyone has used Uilabel, but how to design the font on the label? There is one way:Label.font = [Uifont fontwithname:@ "Avenir-light" size:28];But where does the argument behind the Fontwithname come from? We may as well print

Display effect:The red part is badge, which can be used to display quantities or other information.The use is actually very simple, $.ui.updatebadge ("#" + ID, Res. MSG, "tr");The first parameter is the label number that needs to be displayed, the

32, Uiimage+scale Zoom pictureUIImage can load pictures, but we want to get a zoomed out or enlarged picture, using uiimage can not do, below we add a uiimage classification, used to achieve the image in UIImage Zoom in and zoom out.First, create a

The original has been on the animation smattering, only know in accordance with the method on the Internet will be used on the line, but I feel really a bit hard to write, today finally study the code implementation, suddenly feel more clear. Let's