大约有 6,400 项符合查询结果（耗时：0.0220秒） [XML]
Maintain/Save/Restore scroll position when returning to a ListView
...on suggested by @(Kirk Woll), and it works for me. I have also seen in the Android source code for the "Contacts" app, that they use a similar technique. I would like to add some more details:
On top on my ListActivity-derived class:
private static final String LIST_STATE = "listState";
private Par...
What's the best practice for putting multiple projects in a git repository? [closed]
...t I have multiple projects including java projects, php scripts and Android apps projects.
3 Answers
...
What killed my process and why?
... -B100 signifies the number of lines before the kill happened.
Omit -T on Mac OS.
share
|
improve this answer
|
follow
|
...
difference between primary key and unique key
...
@android A PK with more than one column acts as a single column with respect to the uniqueness. In PostgreSQL at least, this means that a new column (with default name [table_name]_pkey) is added to the table (I've heard this ...
How To Set Up GUI On Amazon EC2 Ubuntu server
...ication" to yes
sudo /etc/init.d/ssh restart
Setting up ui based ubuntu machine on AWS.
In security group open port 5901. Then ssh to the server instance. Run following commands to install ui and vnc server:
sudo apt-get update
sudo apt-get install ubuntu-desktop
sudo apt-get install vnc4server...
Is there type Long in SQLite?
...ata types like int, integer, bigint, etc.?
and
Version of SQLite used in Android?
share
|
improve this answer
|
follow
|
...
Maximum Java heap size of a 32-bit JVM on a 64-bit OS
...not reserve enough space for object heap
Could not create the Java virtual machine.
[C:scratch]> java -Xmx1590M MaxMemory
Total Memory: 2031616 (1.9375 MiB)
Max Memory: 1654456320 (1577.8125 MiB)
Free Memory: 1840872 (1.75559234619 MiB)
[C:scratch]>
Whereas with a 64-bit JVM on the same O...
Simple proof that GUID is not unique [closed]
...ort terms: support is only available on the 28/Feb/2010. Please use a time machine to make support requests on that day only.
EDIT 2
As always, the GC does a better job than I do at managing memory; any previous attempts at doing it myself were doomed to failure.
...
Linux: is there a read or recv from socket with timeout?
..., SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout, sizeof timeout);
// MAC OS X (identical to Linux)
struct timeval tv;
tv.tv_sec = timeout_in_seconds;
tv.tv_usec = 0;
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof tv);
Reportedly on Windows this should be done before...
Java Reflection Performance
...lection involves types that are dynamically resolved, certain Java virtual machine optimizations can not be performed. Consequently, reflective operations have slower performance than their non-reflective counterparts, and should be avoided in sections of code which are called frequently in performa...