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Android: How to enable/disable option menu item on button click?
I can easily do it when I am using onCreateOptionsMenu or onOptionsItemSelected methods.
12 Answers
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Is it a bad practice to use negative margins in Android?
...r been officially supported and won't be supported by ConstraintLayout.
It is easy to work around this limitation though.
Add an helper view (height 0dp, width constrained to parent) at the bottom of your base view, at the bottom add the margin you want.
Then position your view below this one,...
How to manage local vs production settings in Django?
...s to static files) need to remain different, and hence should not be overwritten every time the new code is deployed.
22 An...
What's the difference between @Component, @Repository & @Service annotations in Spring?
Can @Component , @Repository and @Service annotations be used interchangeably in Spring or do they provide any particular functionality besides acting as a notation device?
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How to get root access on Android emulator?
...ssarily complicated :)
$ > adb shell
generic_x86:/ $
generic_x86:/ $ exit
$ > adb root
restarting adbd as root
$ > adb shell
generic_x86:/ #
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Can the Android drawable directory contain subdirectories?
In the Android SDK documentation, all of the examples used with the @drawable/my_image xml syntax directly address images that are stored in the res/drawable directory in my project.
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How to efficiently count the number of keys/properties of an object in JavaScript?
...at's the fastest way to count the number of keys/properties of an object? It it possible to do this without iterating over the object? i.e. without doing
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How do I create a constant in Python?
...annot declare a variable or value as constant in Python. Just don't change it.
If you are in a class, the equivalent would be:
class Foo(object):
CONST_NAME = "Name"
if not, it is just
CONST_NAME = "Name"
But you might want to have a look at the code snippet Constants in Python by Alex Martell...
Objective-C : BOOL vs bool
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From the definition in objc.h:
#if (TARGET_OS_IPHONE && __LP64__) || TARGET_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned...
Is String.Contains() faster than String.IndexOf()?
...e a string buffer of about 2000 characters and need to check the buffer if it contains a specific string.
Will do the check in a ASP.NET 2.0 webapp for every webrequest.
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