Question

Im experienced iOS dev but new to Android dev and asking some newbie questions here…

I am making a app that does a lot of custom drawing of png’s and animations and has no standard UI elements at all, and I have choosen to go down the SurfaceView road. I handle all the detection on what is touched in my SurfaceView code also.

But how on earth do I handle navigation between views from within my SurfaceView code? How do I e.g. navigate to a activity called QuizActivity? In a “normal” view/activity I do it like this:

Intent intent = new Intent(getBaseContext(), QuizActivity.class);
startActivity(intent);

But I do not have access to getBaseContext and startActivity from within my SurfaceView, and even if I did would doing this result in multiple views loaded at the same time?

Bottom line: How do I implement this navigation manually in my code from within my SurfaceView?

Thank you

Søren

Answer 1

from your surface view just call:

    Intent intent = new Intent(getContext(), QuizActivity.class);
    getContext().startActivity(intent)

every view have a reference to the context they’re running, and the context can always start new activities, services, get the resources, etc.

edit

on your surfaceview you include this:

    private SurfaceCallbacks listener;

    public interface SurfaceCallbacks{
       public void onTouch(/* any data you want to pass to the activity*/);
    }

    public void registerSurfaceCallbacksListener(SurfaceCallbacks l){
       listener = l;
    }

    // and then whenever the surface being touched and you want to call something outside of the surface you do:

    if(listener!=null)
       listener.onTouch(/* pass the parameters you declared on the interface */);

and on the activity that holds the surface you do this:

    public ActivityThatHoldsSurface extends Activity implements SurfaceCallbacks{

       // that comes form the surface
       @Override
       onTouch(/* your parameters */){
          // do the navigation stuff
       }

       // and immediately after you inflate or instantiate your surface you do:
       mySurface.registerSurfaceCallbacksListener(ActivityThatHoldsSurface.this);

    }

does it make sense???