Android/Java:使用反射调用方法? [英] Android/Java: Calling a method using reflection?

问题描述

我有一个名为 chooseDialog(String s, int i) 的静态方法，我想在该方法中根据提供给chooseDialog 的参数调用同一类 (Dialogs.class) 中的另一个方法.s 是所需方法的名称， i 是它的单个参数.

I have a static method titled chooseDialog(String s, int i) in which I want to call another method within the same class (Dialogs.class) based on the parameters provided to chooseDialog. s is the name of the desired method and i is it's single parameter.

我尝试了许多教程，并花了几个小时阅读该主题，但我似乎无法确定我到底需要做什么.

I have tried numerous tutorials and have spent a few hours reading up on the subject but I can't seem to get a firm grasp as to what exactly I need to do.

有什么想法吗?

谢谢！

推荐答案

为什么要调用名称传入 String 参数的方法?你不能为不同的动作创建一个常量，然后使用 switch 并在每种情况下调用带有参数 i 的方法吗?

Why do you want to call a method with name passed in a String parameter? Cannot you create a constants for different actions, then use switch and in each case call the method with parameter i?

您将受益于编译器检查您的代码是否有错误.

You will have the benefit of compiler checking your code for errors.

edit:如果你真的想使用反射，检索一个 Method 对象:

edit: if you really want to use reflection, retrieve a Method object with:

Method m = YourClass.class.getMethod("method_name",new Class[] { Integer.class }) 

我猜 Integer.class 可能有用.然后调用方法为

I guess Integer.class might work. Then invoke the metod as

m.invoke(null,123); //first argument is the object to invoke on, ignored if static method

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