That would be the gist of what both Dianne & Romain Guy said yes. On Sep 20, 2:13 pm, MobileVisuals <eyv...@astralvisuals.com> wrote: > GLSurfaceView extends SurfaceView. Does that mean that it is not > possible to animate GLSurfaceView with a viewflipper? > > On Sep 20, 9:54 am, Romain Guy <romain...@android.com> wrote: > > > You can animate another view on top of a SurfaceView, you just cannot > > animate the SurfaceView itself. > > > On Tue, Sep 20, 2011 at 12:51 AM, MobileVisuals > > <eyv...@astralvisuals.com>wrote: > > > > Thanks for the info, I have spent many hours investigating this issue > > > and now I finally know what the problem is. My app has a standard 2d > > > menu. It is possible to view different 3d visual effects from the > > > menu. The 3d visual effects are rendered in a GLSurfaceView. That > > > class extends SurfaceView. > > > > You say that SurfaceView should not be used in a ViewFlipper. How can > > > I implement my app if I can't use SurfaceView or GLSurfaceView? Which > > > type of view should I use for the ViewFlipper? Can I render the 3d > > > visual effects with other views than GLSurfaceView? > > > > Or shouldn't I use a ViewFlipper at all? If not, how can I then switch > > > between the 2d and the 3d rendering? > > > > On Sep 19, 7:37 pm, Dianne Hackborn <hack...@android.com> wrote: > > > > Don't use a SurfaceView in a ViewFlipper. > > > > > Nor a ListView. > > > > > SurfaceView is a *very* *special* view. As it says, what it does is > > > create > > > > a completely separate surface (a.k.a. window) that is associated with > > > your > > > > main window. This window is positioned behind the main window, and a > > > hole > > > > punched through your main window to see the surface behind. > > > > > By its nature, this makes the interaction between the surface of the > > > surface > > > > view and the main view hierarchy limited. > > > > > The purpose of SurfaceView is to present static things like video > > > playback > > > > or a game playfield in its own surface so that it can draw outside of > > > > the > > > > normal view hierarchy update model (and use OpenGL drawing, different > > > color > > > > spaces, etc). It is not to give a tight integration with the rest of > > > > the > > > > view hierarchy. > > > > > You should essentially think of it as an overlay, because really that is > > > > what it is. > > > > > On Mon, Sep 19, 2011 at 10:29 AM, MobileVisuals < > > > eyv...@astralvisuals.com>wrote: > > > > > > My app uses a ViewFlipper. It is possible to flip between the views > > > > > without problems at first.But after switching to another app and then > > > > > switching back to the ViewFlipper app, it is not possible to flip > > > > > between the views. One of the views is always displayed as just a > > > > > black screen. > > > > > > I have investigated the reason for this, using the simplest possible > > > > > SurfaceView. It is still the same problem. > > > > > It is not a thread problem, I see that the onDraw method is called > > > > > like it should. What is the reason for this? Doesn't the ViewFlipper > > > > > class support SurfaceView like it should? > > > > > > I got the code for the SurfaceView from the basic tuturial: > > > > > >http://www.edu4java.com/androidgame/androidgame2.html > > > > > > and the code for the View flipper from Mark Murphys View flipper > > > > > tutorial: > > > > > >https://github.com/commonsguy/cw-android/tree/master/Fancy/Flipper1 > > > > > > This is my code: > > > > > ----------------------------- > > > > > > public class FlipperDemo2 extends Activity { > > > > > > ViewFlipper flipper; > > > > > > @Override > > > > > public void onCreate(Bundle icicle) { > > > > > super.onCreate(icicle); > > > > > setContentView(R.layout.main); > > > > > > flipper=(ViewFlipper)findViewById(R.id.details); > > > > > GameView lv=new GameView(this.getApplicationContext(),true); > > > > > flipper.addView(lv, > > > > > new ViewGroup.LayoutParams( > > > > > ViewGroup.LayoutParams.FILL_PARENT, > > > > > ViewGroup.LayoutParams.FILL_PARENT)); > > > > > GameView lv2=new GameView(this.getApplicationContext(),false); > > > > > flipper.addView(lv2, > > > > > new ViewGroup.LayoutParams( > > > > > ViewGroup.LayoutParams.FILL_PARENT, > > > > > ViewGroup.LayoutParams.FILL_PARENT)); > > > > > flipper.setFlipInterval(2000);//2000 > > > > > flipper.startFlipping(); > > > > > } > > > > > } > > > > > ---------------------------------- > > > > > > public class GameView extends SurfaceView { > > > > > > private SurfaceHolder holder; > > > > > boolean blue; > > > > > > public GameView(Context context,boolean _blue) { > > > > > > super(context); > > > > > holder = getHolder(); > > > > > blue=_blue; > > > > > holder.addCallback(new SurfaceHolder.Callback() { > > > > > > @Override > > > > > public void surfaceDestroyed(SurfaceHolder holder) { > > > > > > } > > > > > > @Override > > > > > public void surfaceCreated(SurfaceHolder holder) { > > > > > > Canvas c = holder.lockCanvas(null); > > > > > onDraw(c); > > > > > holder.unlockCanvasAndPost(c); > > > > > > } > > > > > > @Override > > > > > public void surfaceChanged(SurfaceHolder holder, int > > > > > format, int width, int height) { > > > > > } }); > > > > > } > > > > > > @Override > > > > > > protected void onDraw(Canvas canvas) { > > > > > > if(blue) > > > > > canvas.drawColor(Color.YELLOW); > > > > > else > > > > > canvas.drawColor(Color.GREEN); > > > > > } > > > > > > } > > > > > > -- > > > > > You received this message because you are subscribed to the Google > > > > > Groups "Android Developers" group. > > > > > To post to this group, send email to > > > android-developers@googlegroups.com > > > > > To unsubscribe from this group, send email to > > > > > android-developers+unsubscr...@googlegroups.com > > > > > For more options, visit this group at > > > > >http://groups.google.com/group/android-developers?hl=en > > > > > -- > > > > Dianne Hackborn > > > > Android framework engineer > > > > hack...@android.com > > > > > Note: please don't send private questions to me, as I don't have time to > > > > provide private support, and so won't reply to such e-mails. All such > > > > questions should be posted on public forums, where I and others can see > > > and > > > > answer them. > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to android-developers@googlegroups.com > > > To unsubscribe from this group, send email to > > > android-developers+unsubscr...@googlegroups.com > > > For more options, visit this group at > > >http://groups.google.com/group/android-developers?hl=en > > > -- > > Romain Guy > > Android framework engineer > > romain...@android.com
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