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How to correctly save instance state of Fragments in back stack?
...ion. It's also the one that - in my opinion - is best aligned with how the Android platform works. I would recommend marking this answer as the "Accepted" one to better help future readers.
– dbm
Mar 4 '17 at 8:01
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How to convert a string Date to long millseconds
...PI also known as JSR-310, is so much nicer to work with. You can use it on Android through the ThreeTenABP, see this question: How to use ThreeTenABP in Android Project.
For most purposes I recommend using the milliseconds since the epoch at the start of the day in UTC. To obtain these:
DateTi...
java.util.Date vs java.sql.Date
...time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
Later versions of Android bundle implementations of the java.time classes.
For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….
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On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...f the history stack so that pressing the "back" button returns the user to Android's home screen.
18 Answers
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Is there a performance difference between a for loop and a for-each loop?
... penalty of allocating the iterator. I had some highly parallel code in an Android live wallpaper. I saw that the garbage collector was going crazy. It was because for-each loops were allocating temporary iterators in many different (short-lived) threads, cause the garbage collector a lot of work. S...
Vertically align an image inside a div with responsive height
... images are appearing out of position, below the container div, on mobile (Android v2.3.5). Any idea on a fix for this?
– user1794295
Aug 30 '13 at 9:32
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App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
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对于一个项目，应该开发一个与 ESP8266（项目）通信的 Android 应用程序。为了轻松开发应用程序，选择了 MIT App Inventor 2。
项目中可用的 ESP8266 设备的 IP 地址不应固定。应用程序本身应该确定哪些设备当前处于活动状态以及可...
Difference between initLoader and restartLoader in LoaderManager
...e).
While that sounds straight forward it can be tricky (don't we all love Android...).
We have to distinguish between two cases:
Handles configuration changes itself: this is the case for Fragments
that use setRetainInstance(true) or for an Activity with the according android:configChanges tag i...
SQLite table constraint - unique on multiple columns
... that adding UNIQUE(i, j) to the create statement is completely ignored on android. It creates the table, but leaves off the UNIQUE constraint. I was only able to do this by using an index.
– gattsbr
Aug 11 at 14:55
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Is it possible to create a File object from InputStream
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Couldn't resolve IOUtils in Android Studio and the link you referenced is a 404.
– Shahraiz T.
Nov 24 '16 at 5:07
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