[android-developers] Re: Building composed shapes

SOLUTION:
layer = (LayerDrawable) getResources().getDrawable(R.drawable.layers);
layer.setBounds(** what you want **);
layer.mutate();
layer.draw(canvas);

On 31 Mag, 11:29, Paolo <brand...@gmail.com> wrote:
> UPDATE 2:
>
> I found out the problem!
>
> BitmapFactory.decodeResource(context.getResources(),
> R.drawable.layers);
>
> return always NULL, what could be the problem for you?
>
> On 31 Mag, 11:15, Paolo <brand...@gmail.com> wrote:
>
>
>
> > UPDATE:
> > I have been able to write (layers.xml) what I want on a XML file using
> > Layer-List.
> > so I can use this drawable on a ImageView normally doing:
>
> > <ImageView
> >     android:layout_height="wrap_content"
> >     android:layout_width="wrap_content"
> >     android:src="@drawable/layers" />
>
> > Everything works fine! But this isn't my aim.
>
> > Actually I'd like to use this drawable as a background of my custom
> > view, so I need to use it into the onDraw() method applying it on the
> > canvas of my View.
>
> > ...
> > Bitmap img = BitmapFactory.decodeResource(context.getResources(),
> > R.drawable.layers);
> > canvas.drawBitmap(img, null, rect, paint);
> > ...
>
> > I've this error at runtime:
> > 05-31 10:59:35.289: ERROR/AndroidRuntime(1702):
> > java.lang.NullPointerException
> > 05-31 10:59:35.289: ERROR/AndroidRuntime(1702):     at
> > android.graphics.Canvas.throwIfRecycled(Canvas.java:954)
> > 05-31 10:59:35.289: ERROR/AndroidRuntime(1702):     at
> > android.graphics.Canvas.drawBitmap(Canvas.java:1012)
> > 05-31 10:59:35.289: ERROR/AndroidRuntime(1702):     at
> > it.myPackageTest.view.test.CustomView.onDraw(CustomView.java:79)
> > ...
>
> > I don't call recycle(), so how it is possible? Maybe I can't use
> > layers on a canvas? I really don't know! :(
> > Please tell me something!
>
> > Thanks in advance!
>
> > On 30 Mag, 18:50, Paolo <brand...@gmail.com> wrote:
>
> > > Hi there!
> > > I need to draw a drawable on a canvas. I'd like to avoid using a png
> > > file, but I'd like to draw it with shapes.
> > > The final result must be an unique drawable composed by two rects
> > > overlayed, one smallest than the other one.
>
> > > How can I do that in XML? I've seen layer-list but I can't figure out
> > > if it is useful for my achivement besides the fact I have a runtime
> > > exception... .:(
>
> > > Can anyone hepl me, please?
>
> > > Thanks in advance.

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