This article mainly introduces how to use Android handler. Handler can send messsage and runnable objects to the message queue of the thread associated with them. Each handler object is associated with the line threads that created it, and each handler object can be associated with only one line threads.
Handler generally have two purposes: 1) Perform a scheduled task, you can perform certain tasks on the scheduled implementation, and you can
the view that is displayed on the screen, and can set the slide, load the view forward and reverse need to cache the number of view to load the view in advance, so that the user experience betterTo achieve goal two, enable waterfall to implement a ListView-like Notifydatasetchange () method, so that after the call to Notifydatasetchange () The ListView will check whether the original view is updated, If there is an update,
Analysis of android neutron thread UI update MethodsI. Why do I write this article?
?? Do you often see many books saying: You cannot operate the ui in a child thread, or an error will be reported. Have you also encountered the following questions (see the following code ):
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVie
Android Ui update (2)World in code
1. Review
The first part describes the methods and opinions on Ui thread update, and then describes the Thread Check Mechanism. Here we will analyze in detail the message system model in Android, which is the core of Ui update. Of cours
First, IntroductionThis section shows how to read and update all contact information for the phone through the user profile in an Android system, and how to navigate to those contacts in the user profile.
Ii. Basic Concepts 1. What is User profile
The user profile saves information about the machine master and all contacts on the phone.
Assuming the name of the handset owner is "Mao Mao Yu," The user pr
Work notes, later time to organize:Cd/var/www/nginx-default/android/repositoryrsync-avp/home/gg/android-tools/143/sdksrc/html/android/repository/./rsync-avp/home/gg/android-tools/198/sdksrc/html/android/repository/./Sed-e ' s/https:/http:/g '-i repository-10.xmlSed-e ' s/htt
path under HelloWorld. Then select the project and select Run as > Android application.
If you have a compile error message that does not recognize COCOS2DX, you can choose Properties > Java Build path > Link Source and select E:\cocos2d-x\cocos2d-2.0-x-2.0.4\cocos2dx\ PLATFORM\ANDROID\JAVA\SRC path, name does not conflict with SRC.
If the operation succeeds, the HelloWorld interface pops up. I have be
course there is the problem of verifying code picture cache, need uses-permission android:name= "Android.permission.WRITE_ External_storage "/> this permissionCaching methods:1 Public voidGetcaptcha (File file)throwsIOException {2URL url =NewURL (HOST +captcha_suffix);3URLConnection URLConnection =url.openconnection ();4Urlconnection.setrequestproperty ("Cookie", "jsessionid=" +jsessionid);5 Urlconnection.connect ();6InputStream InputStream =Urlconnection.getinputstream ();
Android Basics Getting Started tutorial--2.4.6 ListView Data Update issuestags (space delimited): Android Basics Getting Started TutorialIntroduction to this section:
We have learned some basic usage of the ListView before, but careful you may find that our dataDefined at the outset, are static, but in real development, our data is often dynamic, such as
protectedBitmapDoinbackground(String ... params) {Bitmap Bitmap = loadimagefromnetwork (params[0]);returnBitmap }/** * When this asynchronous task is completed, that is, after the Doinbackground () method is completed, the return result of the method is the parameter * @param bitmap */ @Override protected void OnPostExecute(Bitmap Bitmap) {Imageview.setimagebitmap (bitmap); }};asynctask.execute ("Http://example.com/image.png");What you ne
Recently, I want to see the JNI of Android and I don't want to switch back to Linux. So I have to choose windows + cygwin + ndk,
When you start to install the cygwin environment, you generally do not know how to install it. Even after installation, you will find that many packages do not exist ,,,
It seems that all the packages in the devel category need to be installed on the Internet ,,
Fortunately, I read an article on the Internet to install and
, the two-dimensional square map remains at the last screen, which is why the whole map should be cleared at the beginning.) After the game fails, start the new game again. At this time, you can observe the underlying data of the last game running by setting the breakpoint ].
But I personally think that the code below Snake is a bit strange to read, a bit like a "first chicken, or first eggs? "The problem leads to a" Strange Circle "in my thinking logic.
switch(item.getItemId()){
caseMENU
can be temporarily unused.3. Create a test classPackage Com.liuhao.mobilesafe.test;import Junit.framework.assert;import Com.liuhao.mobilesafe.r;import Com.liuhao.mobilesafe.domain.updateinfo;import Com.liuhao.mobilesafe.engine.updateinfoservice;import Android.test.androidtestcase;public class Testgetupdateinfo extends Androidtestcase {public void Testgetinfo () Throws exception{ Updateinfoservice service = new Updateinfoservice (GetContext ()); UpdateInfo info = service.getupda
Android OTA update package creation script (2. Decompress), androidota
Step 1: extract (ota_from_target_files)
print "unzipping target target-files..." OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])The above code is the portal to start decompression.
Def UnzipTemp (filename, pattern = None): "Unzip the given archive into a temporary directory and r
minimum version number of the request, and the server will return all data with a version number greater than or equal to 0 when it receives the request.First, add a URL rule in url.pyURL (r ' ^download/(? pThen add the function in the view.py download_kanjidef Download_kanji (Request, version=0): kanji = _mongo.get_kanji (int (version)) return HttpResponse (Kanji, Content_type= "Application/json")Re
messages to start doing things Try{Root.setview (view, Wparams, Panelparentview); }Catch(RuntimeException e) {//Badtokenexception or invaliddisplayexception, clean up. synchronized(MLock) {Final intindex = findviewlocked (view,false);if(Index >=0) {removeviewlocked (index,true); } }ThrowE }}Finally, Viewrootimpl was created in the AddView method of Windowmanagerglobal.Review the previous analysis and summarize:Viewrootimpl was create
When you get to this article, you must have encountered the problem of not finding the latest photos when you need to use a local album in the Android4.4 version. Before Android4.4 in the need to obtain the phone local picture information, only need to send a broadcast update album information, but the system updated to 4.4 after the broadcast is invalid and error.The broadcast is as follows:Sendbroadcast (New Intent (intent.action_media_mounted, Uri.
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