Android app uninstallation event for analytics

I wonder what are the ways/patterns to detect app uninstallation for any kind of analytics on android? I know the limitations of ACTION_PACKAGE_REMOVED intent - not received by application being removed. I am using flurry at the moment and have also discovered that they do not provide any kind of support for deinstallation events. This type of event is definitely something you want in your ana

分析的Android应用程序卸载事件

我不知道有什么方式/模式来检测应用程序卸载android上的任何类型的分析? 我知道ACTION_PACKAGE_REMOVED意图的限制 - 没有被应用程序删除收到。 我目前正在使用乱码,并且还发现他们不提供任何对卸载事件的支持。 这种类型的事件绝对是您的分析中想要的,但目前为止还没有找到任何明确的解决方案。 有任何想法吗? 这是一种可能的方法。 在您的Android应用中,实施对从Google Cloud Messaging(GGM)接收推送消息的支持。

pass by reference and pass by value in c++ and java

Possible Duplicates: What's the difference between passing by reference vs. passing by value? Java and C++ pass by value and pass by reference Java is "pass by value" or "pass by reference"? and what about c++ and c? is c++ and c "passed by value" or "passed by reference"? and what is the difference between "pass by value" or "

通过引用传递并在c ++和java中传递值

可能重复: 传递引用与价值传递之间有什么区别? Java和C ++按值传递并通过引用传递 Java是“通过值传递”还是“通过引用传递”? 那么c ++和c呢? 是c ++和c“通过值传递”或“通过引用传递”? “按价值传递”还是“按引用传递”有什么区别? Java是通过值传递的,但是你传递的值可能是一个参考。 在C ++中,您可以选择是按值还是按引用传递。 在C中,你总是按照价值传递,而不存在任何参考; 你必须通过一个指针来做类似

How do I invoke a Java method when given the method name as a string?

If I have two variables: Object obj; String methodName = "getName"; Without knowing the class of obj , how can I call the method identified by methodName on it? The method being called has no parameters, and a String return value. It's a getter for a Java bean. Coding from the hip, it would be something like: java.lang.reflect.Method method; try { method = obj.getClass().getMethod(m

将方法名称作为字符串给定时,如何调用Java方法?

如果我有两个变量: Object obj; String methodName = "getName"; 在不知道obj类的情况下,我怎样才能调用由methodName标识的方法呢? 被调用的方法没有参数和一个String返回值。 这是一个Java bean的getter。 从臀部编码,它会是这样的: java.lang.reflect.Method method; try { method = obj.getClass().getMethod(methodName, param1.class, param2.class, ..); } catch (SecurityException e) { ... } catch (No

Printing message on Console without using main() method

I was asked this question in an interview. How to print message on console without using main() method? public class Foo { static { System.out.println("Message"); System.exit(0); } } The System.exit(0) exits program before the jvm starts to look for main() Ideone link (Note: even if it compiles with JDK 7's javac it cannot be run with its java , because it e

在控制台上打印消息而不使用main()方法

我在接受采访时被问到了这个问题。 如何在不使用main()方法的情况下在控制台上打印消息? public class Foo { static { System.out.println("Message"); System.exit(0); } } 在jvm开始查找main()之前, System.exit(0)退出程序。 Ideone链接 (注意:即使它用JDK 7的javac它也不能用它的java运行,因为它需要一个main(String[])方法。) public final class Main { static { Sy

Are fields initialized before constructor code is run in Java?

Can anyone explain the output of following program? I thought constructors are initialized before instance variables. So I was expecting the output to be "XZYY". class X { Y b = new Y(); X() { System.out.print("X"); } } class Y { Y() { System.out.print("Y"); } } public class Z extends X { Y y = new Y(); Z() { System.out.print("Z

在Java中运行构造函数代码之前,字段是否已初始化?

任何人都可以解释下面的程序的输出吗? 我认为构造函数在实例变量之前被初始化。 所以我期待输出是“XZYY”。 class X { Y b = new Y(); X() { System.out.print("X"); } } class Y { Y() { System.out.print("Y"); } } public class Z extends X { Y y = new Y(); Z() { System.out.print("Z"); } public static void main(String[] args) { new Z()

How to escape the double quotes in java not as \" but \\u0022

I have a string which has the value String s="D"Souza" Now before sending this i want to replace " with \u022 as a requirement. How to do this ?     public static String escapeJS(String string) {         String escapes[][] = new String[][]{                 {"\", "\\"},                 {""", "\u0022"},                 {"n", "\n"},                 {"r", "\r"},                

如何在java中避免双引号而不是\“但是\\ u0022

我有一个字符串,其值为String s =“D ”Souza“ 现在在发送这个消息之前,我想用\ u022作为一个要求来替换“如何做到这一点?     public static String escapeJS(String string) {         String escapes[][] = new String[][]{                 {"\", "\\"},                 {""", "\u0022"},                 {"n", "\n"},                 {"r", "\r"},                 {"b", "\b"},                 {"f", "\f"},        

What can cause Java compiler to fail while parsing a comment?

The following code is a valid Java program. public class Foo { public static void u006du0061u0069u006e(String[] args) { System.out.println("hello, world"); } } The main identifier is written using Unicode escape sequences. It compiles and runs fine. $ javac Foo.java && java Foo hello, world Although the following details may not be necessary for this question, I a

什么会导致Java编译器在解析注释时失败?

以下代码是一个有效的Java程序。 public class Foo { public static void u006du0061u0069u006e(String[] args) { System.out.println("hello, world"); } } main标识符是使用Unicode转义序列编写的。 它编译和运行良好。 $ javac Foo.java && java Foo hello, world 虽然下面的细节可能不需要这个问题,我分享它,以防有人对此感到好奇。 我在Debian 8.0上使用OpenJDK的Java编译器,但是我在

Java Unicode translation

I came across the following code: public class LinePrinter { public static void main(String args[]) { //Note: u000A is unicode for Line Feed char c=0x000A; System.out.println(c); } } This doesn't compile due to the Unicode replacement done. The question is, why doesn't the comment ( // ) override Unicode replacement done by the compiler? I thought the compil

Java Unicode转换

我遇到以下代码: public class LinePrinter { public static void main(String args[]) { //Note: u000A is unicode for Line Feed char c=0x000A; System.out.println(c); } } 由于完成了Unicode替换,所以不能编译。 问题是,为什么comment( // )不会覆盖编译器完成的Unicode替换? 我认为编译器应该在做任何其他代码转换之前先忽略注释。 编辑: 不知道以上是否足够清楚。 我知道上

Why does this code showing error invalid unicode?

//System.out.println("hii");'uxxx' println语句被评论,但unicode没有评论。为什么? Java allows you to use Unicode in your source code. Unlike many other languages, it allows you to do so anywhere, including, of course, comments. And it allows it in identifiers as well, so you can write legal Java code like this: String हिन्दी = "Hindi"; The variable name is perfectly legal (although codin

为什么此代码显示错误无效的Unicode?

//System.out.println("hii");'uxxx' println语句被评论,但unicode没有评论。为什么? Java允许您在源代码中使用Unicode。 不像许多其他语言,它允许你在任何地方这样做,当然包括评论。 而且它也允许使用标识符,因此您可以编写像这样的合法Java代码: String हिन्दी = "Hindi"; 变量名是完全合法的(尽管编码惯例不鼓励这种使用)。 就javac而言,源代码是Unicode。 问题是它可以用不同的编码表示,有些编辑器不

Why does Java allow control characters in its identifiers?

The Mystery In exploring precisely which characters were permitted in Java identifiers, I have stumbled upon something so extremely curious that it seems nearly certain to be a bug. I'd expected to find that Java identifiers conformed to the requirement that they start with characters that have the Unicode property ID_Start and are followed by those with the property ID_Continue , with an

为什么Java允许在其标识符中使用控制字符?

谜 在探索Java标识符允许使用哪些字符时,我偶然发现了一件非常好奇的事情,以至于几乎肯定是一个错误。 我期望能够找到Java标识符符合以下要求:它们以具有Unicode属性ID_Start的字符ID_Start ,后面跟着具有ID_Continue属性的ID_Continue ,并为引导下划线和美元符号授予例外。 事实证明情况并非如此,我发现与这个或任何其他我听说过的标准标识符的想法存在极大的差异。 短演示 考虑以下演示,证明在Java标识符中允