大约有 40,000 项符合查询结果（耗时：0.0289秒） [XML]
Why doesn't RecyclerView have onItemClickListener()?
...tener = listener;
txtViewTitle = (TextView) itemLayoutView.findViewById(R.id.item_title);
imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.item_icon);
imgViewIcon.setOnClickListener(this);
itemLayoutView.setOnClickListener(this);
}
@Override
pub...
How to get the next auto-increment id in mysql
...
You can get the next auto-increment value by doing:
SHOW TABLE STATUS FROM tablename LIKE Auto_increment
/*or*/
SELECT `auto_increment` FROM INFORMATION_SCHEMA.TABLES
WHERE table_name = 'tablename'
Note that you should not use this to alter the table, use an auto_...
Numbering rows within groups in a data frame
....(cat), mutate, id = seq_along(val))
or:
library(dplyr)
df %>% group_by(cat) %>% mutate(id = row_number())
or (the most memory efficient, as it assigns by reference within DT):
library(data.table)
DT <- data.table(df)
DT[, id := seq_len(.N), by = cat]
DT[, id := rowid(cat)]
...
Scrollview vertical and horizontal in android
... setContentView(R.layout.main);
vScroll = (ScrollView) findViewById(R.id.vScroll);
hScroll = (HorizontalScrollView) findViewById(R.id.hScroll);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float curX, curY;
switch (event.getAction())...
How do you create a random string that's suitable for a session ID in PostgreSQL?
...pDLcyibl2
3fPDd54P5llb84Z
VeywDb53oQfn9GZ
BJGaXtfaIkN4NV8
w1mvxzX33NTiBby
knI1Opt4QDonHCJ
P9KC5IBcLE0owBQ
vvEEwc4qfV4VJLg
ckpwwuG8YbMYQJi
rFf6TchXTO3XsLs
axdQvaLBitm6SDP
(15 rows)
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Using the “animated circle” in an ImageView while loading stuff
...tiveLayout>
And when you finish loading, call this one line:
findViewById(R.id.loadingPanel).setVisibility(View.GONE);
The result (and it spins too):
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...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...jQuery) frame_id = frame_id.get(0).id;
var iframe = document.getElementById(frame_id);
if (iframe && iframe.tagName.toUpperCase() != 'IFRAME') {
iframe = iframe.getElementsByTagName('iframe')[0];
}
// When the player is not ready yet, add the event to a queue
// ...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...：
socket_server.php
<?php
/**
* SocketServer Class
* By James.Huang <shagoo#gmail.com>
**/
set_time_limit(0);
class SocketServer
{
private static $socket;
function SocketServer($port...
How can you represent inheritance in a database?
... the type attribute as in the single table method. The type is now defined by the metadata: the table name.
However this model also comes with a few disadvantages:
The common attributes are mixed with the subtype specific attributes, and there is no easy way to identify them. The database will no...
Draw in Canvas by finger, Android
I need to build a project for drawing on canvas by fingers,
6 Answers
6
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