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What is the AppDelegate for and how do I know when to use it?
...om what I understand of appDelegate, is close to what an Application is in Android. The viewDidLoad, viewDidDisappear is comparable to what Android's Lifecycle. Every application has a life cycle, from launching to interruptions from calls coming in, to notifications showing up. If you need your cod...
Is AsyncTask really conceptually flawed or am I just missing something?
...though there were static strong references to them. Maybe a side-effect of Android's class loader, or a bug even, but static references are no safe way of exchanging state across an activity life-cycle. The app object is, however, that's why I use that.
– Matthias
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How do I set environment variables from Java?
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on Android the interface is exposed via Libcore.os as a kind of hidden API.
Libcore.os.setenv("VAR", "value", bOverwrite);
Libcore.os.getenv("VAR"));
The Libcore class as well as the interface OS is public. Just the class dec...
App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
...; App（即使未打开）
关键特征：
1. 操作系统级别：由 Android/iOS 系统进程接收，不需要 App 运行
2. 持久连接：手机系统与推送服务器保持长连接（不是 App 自己的连接）
3. 省电：所有 App 共享同一条系统级连接
4. 可靠性高：...
How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
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developer.android.com has nice example code for this:
https://developer.android.com/guide/topics/providers/document-provider.html
A condensed version to just extract the file name (assuming "this" is an Activity):
public String getFi...
What is the meaning of addToBackStack with null parameter?
... you mean by get the fragment later.
More information @
http://developer.android.com/guide/components/fragments.html
http://developer.android.com/reference/android/app/FragmentTransaction.html#addToBackStack(java.lang.String)
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Android ListView not refreshing after notifyDataSetChanged
My ListFragment code
11 Answers
11
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ASP.NET Web API Authentication
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Is it going to maintain a session for Android application?
– Mujtaba Hassan
Jun 13 '12 at 12:42
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...载：
cn.fun123.SQLite.aix
SQLite
SQLite 是 Android 内置的小型、快速、独立的 SQL（结构化查询语言）数据库引擎。
SQL 语句用于创建、选择、更新和删除一个或多个表中的数据。SQL 允许表之间建立复杂的关系，并提...
How to compare dates in Java? [duplicate]
...ava.time (JSR-310).
Back-ports are available for Java 6 and 7 as well as Android.
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