大约有 8,446 项符合查询结果（耗时：0.0203秒） [XML]
getting the screen density programmatically in android?
...ources().getDisplayMetrics();
Though Android doesn't use a direct pixel mapping, it uses a handful of quantized Density Independent Pixel values then scales to the actual screen size. So the metrics.densityDpi property will be one of the DENSITY_xxx constants (120, 160, 213, 240, 320, 480 or 640 d...
Scala Doubles, and Precision
...u may use implicit classes:
import scala.math._
object ExtNumber extends App {
implicit class ExtendedDouble(n: Double) {
def rounded(x: Int) = {
val w = pow(10, x)
(n * w).toLong.toDouble / w
}
}
// usage
val a = 1.23456789
println(a.rounded(2))
}
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How to simulate target=“_blank” in JavaScript
... This answer could be improved by adding some description of what is happening
– Elly Post
Oct 13 '16 at 18:54
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kill -3 to get java thread dump
... It's worth noting that jstack requires the JDK. If you're running apps on a server that only has the JRE installed, you'll need to find another means for thread dumping.
– jeffkempf
Nov 27 '17 at 15:30
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Ignoring new fields on JSON objects using Jackson [duplicate]
...on JSON library to convert some JSON objects to POJO classes on an android application. The problem is, the JSON objects might change and have new fields added while the application is published, but currently it will break even when a simple String field is added, which can safely be ignored.
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iPhone UIButton - image position
I have a UIButton with text "Explore the app" and UIImage (>)
In Interface Builder it looks like:
15 Answers
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Error Dropping Database (Can't rmdir '.test\', errno: 17)
...mac, if you are using a mounted XAMPP on it. open the terminal through the application (mounted xampp app) and follow the guide above.
– Bobby Axe
Dec 5 '19 at 16:33
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Java / Android - How to print out a full stack trace?
In Android (Java) how do I print out a full stack trace? If my application crashes from nullPointerException or something, it prints out a (almost) full stack trace like so:
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Postgresql 9.2 pg_dump version mismatch
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This only happens when you upgrade PostgreSQL. I just did a fresh install of the OS and didn't have any problems with this.
– Seth
May 1 '14 at 22:53
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Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...b pull 到 android 系统上(公司开发的是android系统软件，不是app), 说实话，实在无语，原因是 android 系统的 ANR 机制，长时间不操作，调试进程会被系统杀掉，这个后面有时间再研究一下，肯定有更好的办法（不能把ANR机制关了吗 ?...