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How to save an activity state using save instance state?
...ceState.putInt("MyInt", 1);
savedInstanceState.putString("MyString", "Welcome back to Android");
// etc.
}
The Bundle is essentially a way of storing a NVP ("Name-Value Pair") map, and it will get passed in to onCreate() and also onRestoreInstanceState() where you would then extract the values...
Meaning of Choreographer messages in Logcat [duplicate]
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How to handle screen orientation change when progress dialog and background thread active?
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261
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Differences between dependencyManagement and dependencies in Maven
...seful when you have a set of projects (i.e. more than one) that inherits a common parent.
Another extremely important use case of dependencyManagement is the control of versions of artifacts used in transitive dependencies. This is hard to explain without an example. Luckily, this is illustrated in...
What is object slicing?
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Very informative, but see stackoverflow.com/questions/274626#274636 for an example of how slicing occurs during method calls (which underscores the danger a little better than the plain assignment example).
– Blair Conrad
Nov ...
Java Interfaces/Implementation naming convention [duplicate]
...n that the class is abstract and to how it should be used. You could still come up with a better name than AbstractTruck and use BaseTruck or DefaultTruck instead since the abstract is in the definition. But since Abstract classes should never be part of any public facing interface I believe it is a...
Default value of a type at Runtime [duplicate]
...nce is simply null. So, it really is legitimately an actual null reference coming out of e.g. Activator.CreateInstance(typeof(int?)), not an int?. There's probably an int? internally but it disappears during boxing.
– Jonathan Gilbert
Jul 14 '16 at 17:52
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When are you truly forced to use UUID as part of the design?
...5 and Version 3 UUIDs use the SHA1 and MD5 hash functions respectively, to combine a namespace with a piece of already unique data to generate a UUID. This will, for example, allow you to produce a UUID from a URL. Collisions here are only possible if the underlying hash function also has a collisio...
Java lib or app to convert CSV to XML file? [closed]
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typedef struct vs struct definitions [duplicate]
... using typedef . It seems to me like there's really no difference, they accomplish the same goal.
12 Answers
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