infinite looper

Calls in the thread containing the creation of the handler method, will be an error, prompt:"Need call Looper.prepare ()"--before creating, invoke the Looper.prepare () method to create a LooperHowever, the method that contains the create handler may be called in the main thread or in a child thread.When called in the main thread, you add the Looper.prepare () method to it, it may error, prompt:"Only one Looper can be created per thread"--within each

ThreadLocalBefore looking down, you need to know about Java's threadlocal class, you can refer to the blog:Decryption threadlocalLooper, Handler and MessageQueueLet's analyze the previous code and see what the relationship between Handle, Looper, and MessageQueue is in the handler mechanism. Packagecn.lixyz.handlertest;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.os.Handler;ImportAndroid.os.Looper;ImportAndroid.os.Message;ImportAnd

) {TODO auto-generated Method StubMworkhandler.sendemptymessage (Download_start);}});}private void Createworkhandler () {TODO auto-generated Method StubNew Thread () {public void Run () {Looper.prepare ();//Create Looper objects and MessageQueue in worker threadsMworkhandler = new Handler () {public void Handlemessage (Message msg) {if (Msg.what==download_start) {for (int i=0;iSystemclock.sleep (2000);Pbdownload.setprogress (i);Message MSG1 = new Mess

This class of users runs the message loop in a thread. The thread does not have a message loop by default, and you can call prepare () to create a run loop in the threads, and then call Loop () to process the message until the loop endsMost of the message loop interactions are through the handler class;Class Looperthread extends thread{Public Handler handler;//Create Handler object in threadpublic void Run () {Looper.prepare ();//The thread must be created atHandler=new handler () {public void H

Direct Sticker CodeMsgthread.javaPackage Bb.aa.looperdemo;import Android.os.handler;import android.os.looper;import android.os.message;import Android.util.Log; Public classMsgthread extends thread{ Public StaticFinal String TAG ="Msgthread"; PublicHandler _handler =NULL; @Override Public voidrun () {LOG.D (TAG,"Enter the thread's run"); Looper.prepare ();//_handler = new Handler (Looper.getmainlooper ()) {_handler =NewHandler (Looper.mylooper ()) {@Override Public voidhandlemessage (Message msg

In the previous section, we mentioned that the main difference between stream and list is the lazy evaluation feature of stream. We also discussed that when dealing with large array datasets, the stream can move the data elements into memory one at a time and can be processed on an elemental basis. This makes me think of our common data-search reads: A large amount of data is stored in a database, like an infinite source of data. We embed data-reading

PHP implements infinite recursion classification, and php implements infinite recursion. PHP implements infinite recursion classification. php implements infinite recursion in some complex systems. it requires an infinite number of information columns to be classified to enh

PHP implements recursive infinite class classification, PHP implementation recursive infinite In some complex systems, it is required to classify the information columns infinitely, in order to enhance the flexibility of the system. So how does PHP implement an infinite class classification? We use recursive algorithms in this article and combine MySQL data tabl

PHP Simple implementation of infinite class classification method, PHP infinite class classification In this paper, we describe the simple implementation of an infinite class of PHP methods. Share to everyone for your reference, as follows: Database structure: CREATE TABLE IF not EXISTS ' city ' (' id ' int (one) not NULL auto_increment, ' name ' varchar () char

How to implement an infinite element list in Python, and an infinite element list in python The example in this article describes how to implement the infinite element list in Python. The specific implementation can be completed using Yield. The following two sample codes use the Python Yield generator to implement a simple list of

Php infinite polar classification recursive sorting implementation method, php infinite recursive sorting. Php Infinitus classification recursive sorting implementation method, php infinite recursive sorting this article describes the php Infinitus classification recursive sorting implementation method. Share it with you for your reference. Specific Implementatio

the PID is 0 is the root classification $stmt = $pdo->query ("select * from Cate2 where pid={$pid}"); $data = $stmt Fetchall (2), foreach ($data as $v) {$v [' level '] = $level; $CATEARR [] = $v; $cateArr =array_merge ($CATEARR, Getcate3 ($v [' id ') ], $level));} return $CATEARR;} $data = Getcate3 (), foreach ($data as $v) {echo str_repeat (' |nbsp; ', $v [' Level ']). ' | -'. $v [' name ']. ' Method 31 queries Traverse a category (three fields)function Getcate2 ($pid =0, $level =0) {$level +

Php infinite polar classification recursive sorting implementation method, php infinite recursive sorting This article describes how to implement recursive sorting for php infinitus classification. Share it with you for your reference. The specific implementation method is as follows: Copy codeThe Code is as follows: function order ($ array, $ pid = 0 ){$ Arr = array ();Foreach ($ array as $ v ){If ($ v [