Execute code based on user audio input

Question

In an android app, how to execute different Java classes based on what the user says. For example, the user clicks on a button and says 1. The app should execute the Java code with name 1.

Answer 1

Well, about the execution:

If you have a String with the value "One" (from anywhere) you can lookup a class with the same name and execute the methods from it trough Reflection, or if all options are determined you can map objects to the strings, both solutions are as follow:

package classes;
public class One {
   public void doThings() {}
   public void doThings(String xx) {}
}

public static void main(String[] args){
    String className = "One"; //Imagine that it come from Voice-To-Text
    Class<?> clazz = Class.getDeclaredClass("classes." + className);
    Method doThings = clazz.getDeclaredMethod("doThings");
    Method doThingsWithArgs = clazz.getDeclaredMethod("doThings", String.class);
    Object instance = clazz.newInstance();
    doThings.invoke(instance);
    doThingsWithArgs.invoke(instance, "String as argument");
}

You can also share a interface for all implementers such:

public interface DoThings {
   void doThings() {}
   void doThings(String xx) {}
}

package classes;
public class One implements DoThings {
   public void doThings() {}
   public void doThings(String xx) {}
}

public static void main(String[] args){
    String className = "One"; //Imagine that it come from Voice-To-Text
    Class<?> clazz = Class.getDeclaredClass("classes." + className);
    DoThings instance = (DoThings) clazz.newInstance();
    instance.doThings();
    instance.doThings("String as argument");
}

The Map solution is as follow:

public static void main(String[] args){
    Map<String, DoThings> calls = new HashMap<String, DoThings>();
    calls.add("One", new One());
    calls.add("Second", new One());

    String className = "One"; //Imagine that it come from Voice-To-Text

    DoThings instance = (DoThings) calls.get(className);
    instance.doThings();
    instance.doThings("String as argument");
}