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getViewTypeCount and getItemViewType methods of ArrayAdapter
...you don't implement these two methods intuitively according to the Android API Doc, then you might get into the problem I mentioned about.
Summarized Guideline for the implementation:
To implement multiple types of Views for ListView's rows we have to essentially implement, getItemViewType() and g...
Which @NotNull Java annotation should I use?
...3305ecd1b415e2ab1b9ef8a9120b4
javax.validation.constraints from validation-api-1.0.0.GA-sources.jar
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How to throw a C++ exception
... MWE on GitHub, where a backtrace would look something like this:
Library API: Exception caught in function 'api_function'
Backtrace:
~/Git/mwe-cpp-exception/src/detail/Library.cpp:17 : library_function failed
~/Git/mwe-cpp-exception/src/detail/Library.cpp:13 : could not open file "nonexistent.txt"...
Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
... 16）中无法检查。
关于通知通道
随着API级别26（版本 Oreo 8.0），Android引入了通知通道概念，在某些设备上也称为通知类别。所有通知都必须分配一个通道。
通知概念相当复杂。Android允许在设备级别、通道级...
How to reliably guess the encoding between MacRoman, CP1252, Latin1, UTF-8, and ASCII
... annotation. Still an embarassing oversight not to have it in the standard API.
– Michael Borgwardt
Nov 16 '10 at 21:11
...
Sanitizing strings to make them URL and filename safe?
...n in general
OWASP have a PHP implementation of their Enterprise Security API which among other things includes methods for safe encoding and decoding input and output in your application.
The Encoder interface provides:
canonicalize (string $input, [bool $strict = true])
decodeFromBase64 (strin...
How do I create a right click context menu in Java Swing?
... is a bit old - as are the answers (and the tutorial as well)
The current api for setting a popupMenu in Swing is
myComponent.setComponentPopupMenu(myPopupMenu);
This way it will be shown automagically, both for mouse and keyboard triggers (the latter depends on LAF). Plus, it supports re-using ...
What's the difference between SoftReference and WeakReference in Java?
...
Weak Reference
http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/ref/WeakReference.html
Principle: weak reference is related to garbage collection. Normally, object having one or more reference will not be eligible for garbage collection.
The above principle is not applicabl...
What is “lifting” in Scala?
...rovides unlift to help with construction of JSON serialisers:
import play.api.libs.json._
import play.api.libs.functional.syntax._
case class Location(lat: Double, long: Double)
implicit val locationWrites: Writes[Location] = (
(JsPath \ "lat").write[Double] and
(JsPath \ "long").write[Double...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
... The payment gateway vendors provide a way to talk to the Internet Gateway API that you will communicate with. Most vendors provide HTTP or TCP/IP communication with their API. They will process the credit card information on your behalf. Two vendors are Authorize.Net and PayFlow Pro. The link I...