onBack problem

Hello all,

I still having problems with onBack()

function onBack() {
       if (ON_BACK == last_behavior) {
            System.exit();
        }
        last_behavior = ON_BACK;
        return false;
   }

When I press back button everytime exits app. The first time too without launch system.exit

Any help will be welcome Thanks

jim_m_58 over 5 years ago

The "return false;" indicate to the system it should use the default "back" behavior, which is to exit the app.

What is it you are trying to do here? Require the back action twice to exit? The way you are doing this, back could be pressed early on and again a while later, and the app would exit.

What you return from something like onBack() is very important. If you don't want the default behavior, return true.

Jmerino20 over 5 years ago in reply to jim_m_58

Thats the key, return true.....thanks a lot.

jim_m_58 over 5 years ago in reply to Jmerino20

You want to always return true/false in a delegate based on what you want from the FW. The va3/va4/venu are really strict about that and even things might not have a default should return true if you handled them.