How can I call Android JavaScript functions in WebView?

When I call a Java applet function by reference from JavaScript code, it doesn't work correctly.   Is it possible to call Java functions by reference from JavaScript? My guess: I think because Java takes memory on JVM, it is not possible.

• // Java Code:     public class  A extends Applet{             public void foo(int[] a)         {             a[0]=3;         }     }         //Javascript Code:     var arg = new Array(1);     arg[0]=2;     Applet.foo(arg); But `arg[0]` remains `2`

• Answer:

  You are right, JavaScript arrays are copied and converted before they are passed to Java Code. From the https://jdk6.java.net/plugin2/liveconnect/#ARRAY_ACCESS specification: "If a Java method takes an array type as argument, JavaScript may pass a JavaScript array object or literal for that argument. The Java Plug-In will allocate a new Java array and convert each element of the JavaScript array to the appropriate Java type using the conversion rules [...]" If, on the other hand, you allocate the array in Java, you should be able to use it by reference (I didn't try this myself, but the specification above says it).