handler | 易学教程

Understanding Android Fingerprint API authenticate() in depth

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问题 I'm working on Android FingerPrint native API's for couple of days and there are two things that I'm confused with. The documentation has the examples but doesn't explain why we need to work this way, so please, any security Guru here? I want to understand in depth the authenticate() function of the API's, or to be more specific to understand two of the parameters it takes : CryptoObject and Handler . It is working " perfect " at my POV when passing null to both of these parameters. So there

研究下vc++的abort函数

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最近在调试几个问题时，发现跟abort函数有关，以前只是简单使用，现在却发现不简单，就多留意了下。简介 abort中止当前进程并返回错误代码。异常终止一个进程。中止当前进程，返回一个错误代码。错误代码的缺省值是3。代码 /*** *abort.c - abort a program by raising SIGABRT * * Copyright (c) Microsoft Corporation. All rights reserved. * *Purpose: * defines abort() - print a message and raise SIGABRT. * *******************************************************************************/ #include <cruntime.h> #include <stdlib.h> #include <internal.h> #include <awint.h> #include <rterr.h> #include <signal.h> #include <oscalls.h> #include <mtdll.h> #include <dbgint.h> #ifdef _DEBUG #define _INIT_ABORT

Serverless 实战 —— 函数计算 + Typescript 实践

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 前言首先介绍下在本文出现的几个比较重要的概念：函数计算（Function Compute）：函数计算是一个事件驱动的服务，通过函数计算，用户无需管理服务器等运行情况，只需编写代码并上传。函数计算准备计算资源，并以弹性伸缩的方式运行用户代码，而用户只需根据实际代码运行所消耗的资源进行付费。函数计算更多信息参考。 Aliyun Serverless VSCode Extension ：是阿里云 Serverless 产品函数计算 Function Compute 的 VSCode 插件，该插件结合了函数计算 Funcraft：Funcraft 工具以及函数计算 SDK ，是一款 VSCode 图形化开发调试函数计算以及操作函数计算资源的工具。 Funcraft ：Funcraft 是一个用于支持 Serverless 应用部署的工具，能帮助您便捷地管理函数计算、API 网关、日志服务等资源。它通过一个资源配置文件（template.yml），协助您进行开发、构建、部署操作。Fun 的更多文档参考。目标本文打算以一个简单的 Serverless 函数计算项目为例，尝试使用 typescript + nodejs 进行开发，搭建一个简单的工程项目，实现如下小目标：使用 typescript

ProgressDialog doesn't appear immediately

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问题 I have a fragment with some buttons in it, when a button is clicked it should show a ProgressDialog, load an array of bitmaps and show it in the fragment in a gallery, dismiss ProgressDialog. But the ProgressDialog doesn't show immediately, it take something like 1 or 2 seconds and it just blink at the moment when my gallery is show. Im doing this after click: try{ progress = ProgressDialog.show(activity, "", "Loading images", true); //load images //show gallery }catch(){ //... }finally{

Handlers initialized with Looper.getMainLooper() does not respond to message callbacks

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问题 I am trying to implement Handlers listening on the same Looper from different threads. Below I have two Handlers, one created in the main thread, another in the child thread, however both are initialized to listen on the Main Looper. private Handler mMain; public static final ThreadPoolExecutor tpe = (ThreadPoolExecutor) Executors.newCachedThreadPool(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mMain

Java threading issue with handler message data being overwritten by next message

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问题 I have a thread reading data from a bluetooth stream that sends the data to a handler on the main UIThread as it comes in (based on the Bluetooth Chat Sample). I've discovered a threading problem that pops up quite frequently. First, some code for reference. BluetoothService.java (Just the part that reads the incomming data stream. It has been set up correctly before this code runs). public void run() { DebugLog.i("BluetoothService", "BEGIN mConnectedThread"); byte[] buffer = new byte[1024];

Parse error with Generic Handler using IIS

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问题 What made me curious is that the generic handler works just fine when I'm running the Web App in a Visual Studio ASP.NET Development Server. When I change the config to run it directly from IIS the handler just dies. It's an image handler, it writes back an array of bytes to be rendered in an Image object. As I said, it works fine in VS Development Server, but fails on IIS. It doesn't even get called... The error I get when I'm trying to call it directly is this: Parser Error Description: An

How does dojo/request handle html/javascript response?

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问题 Actually, we know dojo/request have a property "handleAs" that can handle about: text json javascript xml But how about if the response is a html fragment with javascript embedded? How to handle it? I am having this problem quite while, I tried to use handleAs: html. The html rendering fine, but I never get the javascript works. 回答1: As I explained you in your other questions, JavaScript is never automatically being executed when using AJAX requests (like dojo/request/xhr ) out of security

Explanation of handler, looper and related android thread classes [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . What are looper, handler and other terms related to android threads? How are these classes related? Where can I find detailed explanation of threads like timer, async task, handler, looper etc in android? 回答1: Here you go: Timer A facility for threads to schedule tasks for future

in c++, changing cursor location without using the windows handle. Qbasic imitation is slow

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问题 Sometimes i need to write things on a location of screen (ex: 10th column and 20th row). I searched on the net and found it is done with using windows handler which is using windows.h. Yes, using handles are fast but somewhat complex so i wrote a class that uses only printf(string) and changes the string in a way that it fits to screen and every printf command fills the entire 80x24 console screen. The class imitates QBasic's CLS , LOCATE x,y and PRINT commands. Question: Is there a simpler