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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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Specifying an Index (Non-Unique Key) Using JPA
...t.Column, index and uniqueIndex properties;
requery (GitHub. Java, Kotlin, Android): Annotation io.requery.Index;
Exposed (Kotlin SQL Library): org.jetbrains.exposed.sql.Index, org.jetbrains.exposed.sql.Table#index(). Example:
object Persons : IdTable() {
val code = varchar("code", 50).index(...
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...
Check if EditText is empty. [closed]
I have 5 EditTexts in android for users to input. I would like to know if I could have a method for checking all the 5 EditTexts if they are null. Is there any way to do this??
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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 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...
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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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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