Java Code Question.

studiorat

Ok I started using Java this evening for the first time. I've used C and C++ a little and Java and Eclipse are really great to work with. I love the way I don't need to declare loads of stuff at the start.

Anyway, I'm going over an example currency convertor program and I have two questions:

public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        
        dollars = (TextView)this.findViewById(R.id.dollars);
        euros = (TextView)this.findViewById(R.id.euros);
        
        dtoe = (RadioButton)this.findViewById(R.id.dtoe);
        dtoe.setChecked(true);
        etod = (RadioButton)this.findViewById(R.id.etod);
        
        convert = (Button)this.findViewById(R.id.convert);
        convert.setOnClickListener(this);
        }

In the code above I'm wondering how I can set it up so I can toggle the radio buttons either from one to the other and each one on and off. I guess it's around the setChecked(true) event thingy, event handler? I dunno...

Secondly, I'm wondering what icicle is? As in (Bundle icicle) and onCreate(icicle).

Thanks.

More questions coming soon on the Native Development Kit.

TPD

RadioButtons need to be added to a RadioGroup before they'll interact with each other, allowing only one to be checked at a time.

http://developer.android.com/resources/tutorials/views/hello-formstuff.html#RadioButtons

Haven't a clue about that icicle thing :P

Atomic Pineapple

icicle is the Bundle that contains the Activities previously frozen state so that you can recreate it if required.

For example if you need to change to landscape mode you will save the Bundle in onSaveInstanceState(Bundle) and then you can use the saved Bundle to recreate your Activity.

studiorat

draffodx wrote: »

icicle is the Bundle that contains the Activities previously frozen state so that you can recreate it if required.

For example if you need to change to landscape mode you will save the Bundle in onSaveInstanceState(Bundle) and then you can use the saved Bundle to recreate your Activity.

I had a feeling it would be something like that.


Re: The radio group I'll check that link.

Thanks.