Android: Javascript function not continuing after eval()

Issue

I am trying to execute an arbitrary Javascript function on an Android WebView and get its result. To invoke the function, I use loadUrl() and I have also added a Javascript interface that is supposed to be called with the result. This is what the JS looks like that I am trying to execute from loadUrl():

(function () {
  var res = eval(foo());
  MyInterface.setResult(res); 
})()

foo stands in for the name of the function I am trying to invoke and MyInterface is the interface that I added earlier. When I do this, foo() does get invoked but the next call does not. I tried changing MyInterface.setResult(res); to simpler JS statements like console.log("finished") but nothing is executed after eval(). If I remove eval the next statement is executed. Any idea on what's going on here?

Solution

eval takes a string. It's trying to invoke a string foo is returning.

Try eval("foo()");

edit: you could just call the function without eval as well.

Answered By - craniumonempty