I am trying to implement an audio spectrum analyzer in android using the Visualizer class. I am getting FFT data in the onFftDataCapture() method of OnDataCaptureListener() event and I'm drawing that on the canvas using drawLines() . But the spectrum display is not showing properly. I can see changes on left side of graph only. But in Window Media Player, the output of the same song is
我试图在android中使用Visualizer类实现音频频谱分析仪。 我在OnDataCaptureListener()事件的onFftDataCapture()方法中获取FFT数据,并使用drawLines()在画布上绘制该数据。 但是频谱显示不正确。 我只能看到图表左侧的更改。 但在Window Media Player中,同一首歌曲的输出不同。 我错过了什么? 任何人都可以通过示例或链接帮助我解决这个问题吗? 码 mVisualizer.setDataCaptureListener( new Visualiz
We ran into a problem in a large, Java, Hibernate-based system last week. Our backend MySQL database (hosted on Amazon RDS) went unresponsive for 5-10 minutes (it would still accept connections, but due to hardware issues, its write throughput dropped to zero). This piece of code: getSession().save(entity); //session is an instance of org.hibernate.Session Ended up hanging for about 8.5 minut
我们上周在一个基于Java,Hibernate的大型系统中遇到了一个问题。 我们的后端MySQL数据库(托管在Amazon RDS上)在5-10分钟内无响应(它仍然会接受连接,但由于硬件问题,其写入吞吐量降为零)。 这段代码: getSession().save(entity); //session is an instance of org.hibernate.Session 挂起约8.5分钟。 所以很明显,在这个陈述中需要某种超时条件,以便在我的特定情况下失败。 我不能保证我将来不会看到类似的硬件问
I'm tearing my hair out over this. I've stripped my scripts right back to code provided in the Gradle tutorial pages as I think I'm either doing something fundamentally wrong or have misunderstood how a multi project application is supposed to be structured using gradle. I've got three java projects within eclipse, with all three containing a build.gradle script and only one co
我正在把头发撕掉。 我已经将我的脚本剥离回Gradle教程页面提供的代码,因为我认为我要么做根本错误的事情,要么误解了一个多项目应用程序应该如何使用gradle进行结构化。 我在eclipse中有三个java项目,其中三个包含build.gradle脚本,只有一个包含settings.gradle脚本。 结构如下: Scripts -- build.gradle -- settings.gradle Database -- build.gradle Services -- build.gradle 我正在尝试使用“脚本”项目中的构建脚
My 12 year old brother has recently expressed an interest in learning to program. I of course think this is a great idea, why not start him early? I'm wondering what you guys think with regards a book? I was thinking I should start him off on Java but I'm unsure what book would be best? Any suggestions with regards a book or even another language would be much appreciated. UPDATE: I
我12岁的哥哥最近表示有兴趣学习编程。 我当然认为这是一个好主意,为什么不尽早开始呢? 我想知道你们对一本书的看法? 我想我应该从Java开始,但我不确定哪本书最好? 任何关于一本书或甚至另一种语言的建议都将非常感激。 更新:我已经和Python一起去了,并且以“为孩子们争吵蛇”开始了他。 我发现Python起初很容易学习。 这是一本非常有趣的书。 只要确保他有乐趣! 乐高头脑风暴? http://mindstorms.lego.com
就像这个问题的对应点:Java中的接口是什么? An interface is a special form of an abstract class which does not implement any methods. In Java, you create an interface like this: interface Interface { void interfaceMethod(); } Since the interface can't implement any methods, it's implied that the entire thing, including all the methods, are both public and abstract (abstract in Java
就像这个问题的对应点:Java中的接口是什么? 接口是抽象类的一种特殊形式,它不实现任何方法。 在Java中,您可以像这样创建一个接口: interface Interface { void interfaceMethod(); } 由于接口不能实现任何方法,这意味着包括所有方法在内的整个事物都是公共和抽象的(Java中抽象的意思是“没有被这个类实现”)。 所以上面的界面与下面的界面相同: public interface Interface { abstract public void interface
This question already has an answer here: What is the difference between an interface and abstract class? 32 answers Why to use Interfaces, Multiple Inheritance vs Interfaces, Benefits of Interfaces? 11 answers 抽象类可以有非静态变量。 There are some important differences between abstract class and interface. Some of them are listed below. Abstract class can have implementation in it b
这个问题在这里已经有了答案: 界面和抽象类有什么区别? 32个答案 为什么要使用接口,多继承与接口,接口的好处? 11个答案 抽象类可以有非静态变量。 抽象类和接口之间有一些重要的区别。 其中一些列在下面。 抽象类可以在其中实现,但接口不能。 在接口中,你可以只有静态final变量(在intrface中声明的所有值都是自动常量,静态即不可变变量),但在抽象类中可以有可变变量。 抽象类可以扩展,只有一个抽象类
This question already has an answer here: What is the difference between an interface and abstract class? 32 answers Read here http://javarevisited.blogspot.kr/2013/05/difference-between-abstract-class-vs-interface-java-when-prefer-over-design-oops.html Difference between abstract class and interface in Java Abstract Class vs Interface in Java and When to use them over otherWhile decidin
这个问题在这里已经有了答案: 界面和抽象类有什么区别? 32个答案 请阅读http://javarevisited.blogspot.kr/2013/05/difference-between-abstract-class-vs-interface-java-when-prefer-over-design-oops.html Java中抽象类和接口的区别 Java中的抽象类与接口以及何时使用它们在决定何时使用接口和抽象类时,了解Java中抽象类与接口之间的区别很重要。 在我看来,它们之间的两个区别决定了何时使用Java中的抽象类或接
This question already has an answer here: Interface vs Abstract Class (general OO) 33 answers What is the difference between an interface and abstract class? 32 answers Interfaces and abstract classes are different in that interfaces describe behavior, while abstract classes define partial implementations. Interfaces have the advantage that they can be implemented by any object which prov
这个问题在这里已经有了答案: 界面与抽象类(一般OO)33个答案 界面和抽象类有什么区别? 32个答案 接口和抽象类不同之处在于接口描述行为,而抽象类定义部分实现。 接口的优点是它们可以由提供必要方法的任何对象来实现,而不管该对象从哪个类继承。 抽象方法通常用于提供部分实现。 List接口定义了List集合的行为,而AbstractList则提供了大多数List实现所需的一些方法,以便于实现List。 列表不需要继承Abstract
This question already has an answer here: What is the difference between an interface and abstract class? 32 answers Simply saying: interface is a contract, abstract class is skeletal implementation. (Additionally, in Java interfaces are mostly used because it's not possible to extend multiple classes.) Contract says what, implementation says how. Example of interface: java.util.Lis
这个问题在这里已经有了答案: 界面和抽象类有什么区别? 32个答案 简单地说:接口是一个契约,抽象类是骨架的实现。 (另外,在Java接口中大多使用,因为不可能扩展多个类。) 合同说什么,实施如何说。 接口的例子: java.util.List 。 它具有任何列表应具有的所有方法: add() , size() , indexOf()等。 抽象类的示例: java.util.AbstractList 。 虽然它有很多抽象方法,但是在那里实现了一些不依赖于方式元
I'm using Eclipse I've got some JUnit 4 test cases defined. Some of the classes have changed (only slightly at the moment) and I was wondering if there's any way to open up the GUI where I can select the methods I want to create test stubs for again to update the existing test cases. I know I could add them manually and I could also create a new Test Case with a different file name
我正在使用Eclipse我已经定义了一些JUnit 4测试用例。 有些类已经改变了(现在只有一点点),我想知道是否有任何方法可以打开GUI,我可以选择我想创建测试桩的方法,以便再次更新现有的测试用例。 我知道我可以手动添加它们,也可以使用不同的文件名创建一个新的测试用例,然后复制并粘贴它们,但是有什么方法可以更顺利地从Class更新测试用例吗? 马特 我使用了一个名为MoreUnit的插件。 如果您使用的是方法,则可以按C