Never, ever, ever decode bitmaps from the onDraw() method. This is going to cause big performance issues.
On Wed, Jun 22, 2011 at 11:41 PM, Zarah <[email protected]> wrote: > Hi again! I tried creating a custom View that extends View so I can > control how the image should appear and where it should appear. > > I override the onDraw() method like this: > @Override > protected void onDraw(Canvas canvas) { > super.onDraw(canvas); > > Bitmap bitmapOrg = > BitmapFactory.decodeResource(mContext.getResources(), mResourceID); > > // ... set up image (scale, rotate, etc) ... > // (maybe this can be moved done before calling this method?) > > canvas.drawBitmap(resizedBitmap, mXLocation, mYLocation, null); > } > > It draws the image the size that I want it to be, at the coordinates I > want to be. So far, so good. I tried adding two instances of this > custom View and they appeared correctly. But I noticed that the bounds > of each image spans the whole screen, so I cannot capture which of the > two images was clicked. > > I tried changing the custom View to inherit from ImageView instead, > and now the app can recognize which of the two images was clicked. BUT > it doesn't draw where I want it to draw. All images are dumped on the > upper left hand corner. :( > > If I can merge the two results, it would be perfect (I think!) for > what I need. > > Any thoughts? :) > > > Thank you so much! > - Zarah > > > > On Jun 23, 11:45 am, Zsolt Vasvari <[email protected]> wrote: >> If you want the simplicity of View objects, use the layout_margin as I >> outlined above. >> >> The rotation should be doable via translation animations, if not, you >> can certainly set up a Timer and change the View margins so they >> appear is the new positions. Now, if you need to rotate each >> individual View so they appear as if they were on carousel, I am not >> sure how to do that. If they are just ImageButtons, you can probably >> rotate and change their Drawables. >> >> On Jun 23, 10:23 am,Zarah<[email protected]> wrote: >> >> >> >> >> >> >> >> > Hi Nik and Zsolt! Thanks for your responses! >> >> > Yeah, I would need to have the conveniences of View objects (listeners >> > and such). I would also need to be able to rotate the Canvas each time >> > the user clicks and drags on an image and still be able to track which >> > image was clicked. >> >> > -Zarah. >> >> > On Jun 23, 6:56 am, Zsolt Vasvari <[email protected]> wrote: >> >> > > But I think he wants the other niceties, such as the visible state >> > > changes, etc, at least that way my impression. Those things aren't >> > > trivial to implement. >> >> > > Of course, if that's not a requirement, just use a Canvas object. >> >> > > On Jun 22, 10:15 pm, niko20 <[email protected]> wrote: >> >> > > > I would suggest using a Canvas and just drawing yourself. Then in the >> > > > onTouch handler just do the match to find which circle was clicked. >> > > > You could use RelativeLayout too if you wanted to use views. >> >> > > > -nik >> >> > > > On Jun 22, 5:56 am, Zsolt Vasvari <[email protected]> wrote: >> >> > > > > Yes, looks like it is. Sorry, I didn't know that as I've never used >> > > > > AbsoluteLayout. >> >> > > > > I guess you could use FrameLayout and then give each view an >> > > > > appropriate layout_marginLeft and layout_marginTop. >> >> > > > > On Jun 22, 6:44 pm,Zarah<[email protected]> wrote: >> >> > > > > > Hi Zsolt! >> >> > > > > > But isn't that deprecated already? >> >> > > > > > -Zarah. >> >> > > > > > On Jun 22, 6:40 pm, Zsolt Vasvari <[email protected]> wrote: >> >> > > > > > > Use an AbsoluteLayout >> >> > > > > > > On Jun 22, 6:33 pm,Zarah<[email protected]> wrote: >> >> > > > > > > > Hi guys, >> >> > > > > > > > This is such a n00b question but I hope someone helps me. :) >> >> > > > > > > > I have always made apps that make use of traditional widgets >> > > > > > > > so when >> > > > > > > > it comes to things like this I am totally at a loss. :( >> >> > > > > > > > Anyhooo, my aim is to display a set of images of beads into a >> > > > > > > > circle >> > > > > > > > (sort of forming a bracelet), with each bead being clickable. >> > > > > > > > Some of >> > > > > > > > the beads are not perfect spheres (some are oblong-ish), so I >> > > > > > > > would >> > > > > > > > have to rotate the images by some degrees to either left or >> > > > > > > > right to >> > > > > > > > make them look like they are stringed together. >> >> > > > > > > > I don't have an idea how to start doing this because I don't >> > > > > > > > know how >> > > > > > > > I should tell the OS where to place the images. Should I use a >> > > > > > > > Canvas? >> > > > > > > > Learn OpenGL? >> >> > > > > > > > If I use a Canvas, I would end up having a bitmap with all the >> > > > > > > > images, >> > > > > > > > right? Can I still make the images clickable? >> >> > > > > > > > If I use OpenGL, is it an overkill? The main animation I would >> > > > > > > > have to >> > > > > > > > do is simply have the circle rotate when the user clicks and >> > > > > > > > drags on >> > > > > > > > a bead. >> >> > > > > > > > Thank you in advance! >> >> > > > > > > > -Zarah.- Hide quoted text - >> >> > > > > > - Show quoted text -- Hide quoted text - >> >> > > > - Show quoted text -- Hide quoted text - >> >> > - Show quoted text - > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
