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How to detect when an Android app goes to the background and come back to the foreground
... means that you would need to implement whatever you want done on resuming from background in all Activity of your Application. I believe the original question was looking for something like a "onResume" for Application and not Activity.
– SysHex
Aug 20 '13 at ...
Android destroying activities, killing processes
...e.
If an activity is paused or stopped, the system can drop the activity from memory by either asking it to finish, or simply killing
its process. When it is displayed again to the user, it must be
completely restarted and restored to its previous state.
And, for the process lifecycle:
...
How to get the build/version number of your Android application?
...tually this is the best solutions after Android Studio was launched !!! +1 from my side
– Dhruvil Patel
Nov 3 '14 at 10:38
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When to use reinterpret_cast?
...le confused with the applicability of reinterpret_cast vs static_cast . From what I have read the general rules are to use static cast when the types can be interpreted at compile time hence the word static . This is the cast the C++ compiler uses internally for implicit casts also.
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Case objects vs Enumerations in Scala
...g difference is that Enumerations come with support for instantiating them from some name String. For example:
object Currency extends Enumeration {
val GBP = Value("GBP")
val EUR = Value("EUR") //etc.
}
Then you can do:
val ccy = Currency.withName("EUR")
This is useful when wishing to pers...
C# Java HashMap equivalent
Coming from a Java world into a C# one is there a HashMap equivalent? If not what would you recommend?
7 Answers
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When - and why - should you store data in the Windows Registry?
...ife. I can't easily track changes to those options, can't easily port them from machine to machine, and it all makes me really yearn for the good old days of .INI files...
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Circle-Rectangle collision detection (intersection)
... implement too: one way would be to check if the foot of the perpendicular from P to the line is close enough and between the endpoints, and check the endpoints otherwise.
The cool thing is that the same idea works not just for rectangles but for the intersection of a circle with any simple polygon...
byte + byte = int… why?
...ions to do arithmetic with 32 bits very quickly. Doing the conversion back from the result to a byte automatically could be done, but would result in performance penalties in the case where you don't actually want that behaviour.
I think this is mentioned in one of the annotated C# standards. Looki...
Array or List in Java. Which is faster?
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@Fortyrunner - From your experience, are there any such choices in Java between abstraction and raw data forms that do make a significant difference in performance ?
– euphoria83
Apr 4 '09 at 17:53
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