handler | 易学教程

Android: Updating UI using Handler

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问题 I implemented an Android Application that consists of four activity (A,B,C,D). A calls B; B calls C and C calls D. The activity A implements a Handler Handler handler=new Handler(){ public void handleMessage(Message msg){ Bundle bundle = new Bundle(); bundle = msg.getData(); String key = bundle.getString("Changed"); if(key.compareTo("NotificationType") == 0){ String completeStr = bundle.getString(key); if(completeStr.compareTo("Message") == 0) { // update UI of Activity A } } } }; The

secureCat扫描jetty

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jetty 应该是目前最活跃也是很有前景的一个 Servlet 引擎。本文将介绍 Jetty 基本架构与基本的工作原理：您将了解到 Jetty 的基本体系结构；Jetty 的启动过程；Jetty 如何接受和处理用户的请求。你还将了解到 AJP 的一些细节：Jetty 如何基于 AJP 工作；以及 Jetty 如何集成到 Jboss；最后我们将比较一下两个 Servlet 引擎：Tomcat 和 Jetty 的优缺点。 Jetty 的基本架构 Jetty 目前的是一个比较被看好的 Servlet 引擎，它的架构比较简单，也是一个可扩展性和非常灵活的应用服务器，它有一个基本数据模型，这个数据模型就是 Handler，所有可以被扩展的组件都可以作为一个 Handler，添加到 Server 中，Jetty 就是帮你管理这些 Handler。 Jetty 的基本架构下图是 Jetty 的基本架构图，整个 Jetty 的核心组件由 Server 和 Connector 两个组件构成，整个 Server 组件是基于 Handler 容器工作的，它类似与 Tomcat 的 Container 容器，Jetty 与 Tomcat 的比较在后面详细介绍。Jetty 中另外一个比不可少的组件是 Connector，它负责接受客户端的连接请求，并将请求分配给一个处理队列去执行。图 1. Jetty

Android Testing Handler.postDelayed

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问题 I'm newbie on Android and get stuck on testing a SplashScreen, basically what I'm doing is trying to test that the splash screen stays on for 3s. this is the code for the splashScreen @Override protected void onStart() { super.onStart(); new Handler().postDelayed(new Runnable() { @Override public void run() { Intent i = new Intent(SplashScreenActivity.this, MainActivity.class); startActivity(i); finish(); } }, SPLASH_TIME_OUT); } And this is my approach for the test: @Test public void

Values “resetting” back to zero after Task is completed C#

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问题 This is my function, it returns a struct with the number of successful commands, the number of the ones with errors and also the total of both and also the file path from wich they are being exectued in a Iprogress interface. public void ExecuteCommands(string Directories, CdpsiUpdateSql Updater, CdpsiUpdateSqlparser parser, string Log, IProgress<Result> progress) { Result FinalResult = new Result(); int totalWithErrors = 0; int totalSuccess = 0; string[] numArray1 = new string[3]; List

c# how to deal with events for multi dynamic created buttons

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问题 I have created a WinForm and I added to it dynamic Buttons, how I can deal with it's events public static void Notify() { var line = 3; Form fm = new Form(); fm.Text = "Hello!"; fm.ShowInTaskbar = false; fm.ShowIcon = false; fm.MinimizeBox = false; fm.MaximizeBox = false; fm.FormBorderStyle = FormBorderStyle.FixedToolWindow; fm.TopMost = true; fm.ClientSize = new Size(150, 75 * line/2); Rectangle workingArea = Screen.PrimaryScreen.WorkingArea; int left = workingArea.Width - fm.Width-5; int

Programatically reduce time interval in handler. Android

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问题 When you use the postDelayed function on a handler, a delayMillis variable is required to specify the time after which the handler runs. I want my handler to repeat indefinitely so I have nested two postDelayed functions. final int initialdt = 1000; final Handler handler = new Handler(); final Runnable r = new Runnable() { public void run() { handler.postDelayed(this, initialdt); } }; handler.postDelayed(r, initialdt); However using this method, the time between the run() calls is fixed.

timer task strange behaviour

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问题 I m facing issue in fitness app after 1 hr timertask runs slow or sometimes it runs too fast like it increase 2 second simantaneously please someone suggest stable solution ..I am saving user history when ever I get new location any help is appreciated public void reStartTimerTask(final boolean onCreate) { if (Validator.isNull(timer)) { if (preferences.isGps()) { IntentFilter intentFilter = new IntentFilter(Util.LOCAL_RECEIVER); intentFilter.addCategory(Intent.CATEGORY_DEFAULT);

Accessing a Bluetooth “ConnectedThread” from various activities

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问题 I have created a BluetoothManager much like the one in this example. This object is instantiated in a connection activity, reached from the main acitivty by clicking on a "Connect" button, which provides a ListView of selectable devices. Works great so far. I am now connected and have a BluetoothManager.ConnectedThread running and the streams set up. I would now like to be able to send Bluetooth data from/to various other activities when they are running. For example, I will want to chart

cannot touch view from another thread, how to make it possible?

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问题 I cant figure out why i cant set text to my textView tv. getting: E/AndroidRuntime(686): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. I tried many ways to make it right. As you can see i tried Handler because i had the same problem with toasts. Now toast works but setText doesnt :(( Please someone help me, how should i configure this handler? public class calculate extends Activity implements OnClickListener

Get EventHandler by name?

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问题 if there is another question that explains this I apologize for not being able to find it, but I think it might have to do with my unfamiliarity with some of the terms involved with what I'm trying to do. What I'm trying to do is to add an eventhandler to a button by name. So for example, in the code below instead of knowing that I want to add showInfo, can I reference the EventHandler by name (string) like "showInfo"? myButton.Click += new EventHandler(showInfo); void showInfo(object sender,