Android glSurfaceView with overlay using XML/Java

Question

I started an Android OpenGL application and I have the following classes:

class A extends Activity
class B extends GlSurfaceView implements Renderer

When class A's onCreate is called, it creates an object of type class B and calls:

setContentView(Bobject)

So far it works and I spent a few days on it.

Now I wanted to add buttons to my application and found the SurfaceViewOverlay example. That uses some XML to create a view hierarchy. I wanted to create something very similar to I simply cut and paste the XML code:

    <android.opengl.GLSurfaceView android:id="@+id/glsurfaceview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    <LinearLayout android:id="@+id/hidecontainer"
            android:orientation="vertical"
            android:visibility="gone"
            android:background="@drawable/translucent_background"
            android:gravity="center"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            ...

Now keeping in mind my original class hierarchy, how would I initialize my views? What should I write in onCreate() of my class A?

I tried using:

Bobject = new B(this);
GLSurfaceView glSurfaceView =
        (GLSurfaceView) findViewById(R.id.glsurfaceview);
    glSurfaceView.setRenderer(Bobject);

And it does draw the buttons and the GL view on the screen, but the GL view is unable to take in any input from taps/clicks.

This is likely because Bobject's onTouchEvent() is not called as it is only being used as a:

Renderer

and not a:

glSurfaceView

object.

Instead of the above code, what I really want is to have Bobject replace glSurfaceView. But I don't know how to do that. When I do findViewById(), it seems like the glSurfaceView is already created for now. How can I ask it to use an object of type B for the GL view?

Sorry about any newbie mistakes. Completely new to Android.

EDIT: I also tried this:

I also tried the following: In my XML file, I changed the GLSurfaceView to:

<com.bla.bla.B
            android:id="@+id/glsurfaceview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

And in my A class constructor I am calling:

// This returns null
Bobject = (B) findViewById(R.id.glsurfaceview);

// And this suspends the application. :(
setContentView(R.layout.surface_view_overlay);

How should I use my custom class that extends glSurfaceView in my XML file/Activity?

Answer 1

Okay, so the proper way of doing this is to have a constructor in the B class which takes in:

B(Context context, AttributeSet attrs)
{
  super(context, attrs);
}

And in the XML layout, use this:

<com.bla.bla.B
        android:id="@+id/glsurfaceview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

The thing that was missing in my code was the constructor signature.