android ui prototyping

IntroductionFor the program to run on different sizes of Android machines, the applicability of the UI caused additional overhead, but the advent of qualifiers, it is convenient to solve the problem. Resolve the load of the resource by creating a qualifier-related folder.Qualifier useQualifiers (MDPI,TVDPI,HDPI) help us to determine screen densityQualifiers (Land,port) help us to distinguish screen statusQu

IntroductionFor the program to execute on different sizes of Android machines, the applicability of the UI caused additional overhead, just the qualifier, it is very convenient to overcome the problem. Resolve resource onboarding by creating qualifiers related folders.Qualifier useQualifiers (MDPI,TVDPI,HDPI) can help us infer screen densityQualifiers (Land,port) help us to distinguish screen statusQualifie

resources in the application can be directly used, specific, you can go to the corresponding folder in ANDROID-SDK to see. For example: can enter the $android-sdk$\platforms\android-8\data\res, inside of system resources is sweeping.Developers need to spend some time familiarizing themselves with these resources, especially the picture resources and various styl

I occasionally see this on the internet todayArticleHttp://hold-on.iteye.com/blog/991403 1. We all know that in Android development, non-UI threads cannot operate controls in the UI thread, that is, the UI is non-thread-safe; 2. When the setprogress (INT count) method of the progressbar control is called in the wor

Today occasionally on the Internet to see this article http://hold-on.iteye.com/blog/991403 1, as we all know, in the development of Android, non-UI threads cannot manipulate controls in the UI thread, that is, the UI is not thread safe; 2, but when the setprogress (int count) method of the ProgressBar control is inv

Google Play to download and install nine old androids Sample to view the demo.3. Pull to RefreshThe Android system provides a ListView control for us, and the ListView can show us rich content, and sometimes we need a better and more user-friendly experience to improve the user's health. By using pull to refresh, we are able to implement a drop-down list to refresh the current page content.4. Progress WheelProgress Wheel is a scrolling progress bar t

event queue of the UI thread.If the current thread is the main UI thread, execute the runnable code directly, otherwise runnable post to the message queue of the UI threads. -- Just look at the code implementation.ParametersAction the action to run on the UI thread Public Final void Runonuithread (Runnable action) {

The sub-thread updates the UI. Obviously, if your program needs to execute time-consuming operations, it would be wrong if the main thread is responsible for executing the operation as in the previous example. Therefore, we need to create a new sub-thread in the onclick method to call Google API to obtain weather data. The easiest way to think of Android Developers is as follows: Java code Public void onc

Android imitates the QQ space style UI and androiduiContent Environment Demonstrate the UI that imitates the QQ space Style Although this UI is a little different from the current QQ space, you can also learn a lot. Download Demo Environment Windows 7 64-bit Eclipse ADT V22.6.2,

(); Mimageview.setimagebitmap (result); }Else{Toast.maketext (asynctaskactivity). This,"Get Picture Failed", Toast.length_long). Show (); } }protected void OnPreExecute() {//In Doinbackground (Params ...) is called before the UI thread executes theMimageview.setimagebitmap (NULL); Mprogressbar.setprogress (0);//progress bar Reset}protected void oncancelled() {//In UI thread executionMpr

.)); v. getbackground (). setalpha (100 );}}}; Http://hi.baidu.com/doyee/blog/item/9cec678189ff48d4bd3e1e30.html Android UI event processing [isintouchmode ()] On the Android platform, there are many ways to capture user trigger events on the interface. The View class provides these methods. When you use various view views to layout the interface

In an application, there is typically more than one activity, and each activity corresponds to a UI layout file. In general, in order to keep the style of the different Windows unified, in these UI layout files, almost certainly will use a lot of the same layout. If we rewrite the same layout in every XML file, one is code redundancy, readability is poor, the other is cumbersome to modify, and very detrimen

Activity can be seen as a human-computer interface for the entire Android system, which provides a window to draw the UI, and each activity starts with a content view that we need to set as the UI contents of the activity. This process is accomplished through the Setcontentview () method.As we all know, the concept of the view is enhanced in

Every Android application runs in a dalvik virtual machine process. When a process starts, a main thread (MainThread) is started. The main thread is responsible for processing ui-related events, therefore, the main thread is often called the UI thread. Because Android uses a single-threaded

"The World in the Code " Describe your Android learning path with text notes 　　reprint please retain source by Qiao http://blog.csdn.net/qiaoidea/article/details/45115047 1. Brief descriptionPut on a first one of the most error-prone errors we've had when we're doing Android development Androidruntimeexception : "Only theoriginal thread, that created a view Hierarchy can touch its views "T

Android UI programming (7) -- Fragment, androidfragment Fragment is a part of the Activity interface or an action. You can combine multiple Fragment members into an Activity to create a multi-faceted interface and reuse one Fragment in multiple activities. You can also think of Fragment as a modularized Activity. It has its own life cycle, receives its own events, and can be added or deleted when the Activi