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How to get current memory usage in android?
...ailableMegs = mi.availMem / 0x100000L;
//Percentage can be calculated for API 16+
double percentAvail = mi.availMem / (double)mi.totalMem * 100.0;
Explanation of the number 0x100000L
1024 bytes == 1 Kibibyte
1024 Kibibyte == 1 Mebibyte
1024 * 1024 == 1048576
1048576 == 0x...
How to get the last date of a particular month with JodaTime?
... @Jon Skeet How to get this using Java 8's new Date and Time API?
– Warren Nocos
Nov 9 '15 at 12:21
5
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Java: getMinutes and getHours
...tead of standard java.util.Date classes. Joda Time library has much better API for handling dates.
DateTime dt = new DateTime(); // current time
int month = dt.getMonth(); // gets the current month
int hours = dt.getHourOfDay(); // gets hour of day
See this question for pros and cons of usin...
SparseArray vs HashMap
...pe.
There are some variants for different key/value types, even though not all of them are publicly available.
Benefits are:
Allocation-free
No boxing
Drawbacks:
Generally slower, not indicated for large collections
They won't work in a non-Android project
HashMap can be replaced by the fol...
How to check if BigDecimal variable == 0 in java?
...quals and compareTo is not as you think. docs.oracle.com/javase/1.5.0/docs/api/java/math/…
– nhahtdh
Aug 31 '12 at 1:53
2
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How to initialize all members of an array to the same value?
... array in C (not C++ if that makes a difference). I want to initialize all members of the same value.
23 Answers
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Why does AngularJS include an empty option in select?
...orking with AngularJS for the last few weeks, and the one thing which is really bothering me is that even after trying all permutations or the configuration defined in the specification at http://docs.angularjs.org/api/ng.directive:select , I still get an empty option as the first child of select e...
Is there a function that returns the current class/method name? [duplicate]
...thodInfo or a ConstructorInfo.
This namespace is a part of the reflection API, so you can basically discover everything that the run-time can see by using it.
Here you will find an exhaustive description of the API:
http://msdn.microsoft.com/en-us/library/system.reflection.aspx
If you don't fee...
How do I create a right click context menu in Java Swing?
...
You are probably manually calling setVisible(true) on the menu. That can cause some nasty buggy behavior in the menu.
The show(Component, int x, int x) method handles all of the things you need to happen, (Highlighting things on mouseover and...
What is a segmentation fault?
...ng to a read-only portion of the memory, etc. Segmentation fault is essentially the same in most languages that let you mess with the memory management, there is no principial difference between segfaults in C and C++.
There are many ways to get a segfault, at least in the lower-level languages suc...