android - Applying color filter in StateListDrawable not working -

i'm writing application in have on-the-fly image-mutations.

what have put drawable on screen somewhere, give fancy color can changed on fly , make clickable (with statelistdrawable).

for color-change on fly thinking use porterduffcolorfilter apply on drawable. adding drawables statelistdrawable seems bad idea color filters removed. came solution found somewhere on so:

    bitmapfactory.options options = new bitmapfactory.options();     options.inpreferredconfig = bitmap.config.argb_8888;     bitmap 1 = bitmapfactory.decoderesource(context.getresources(), r.drawable.my_drawable, options);     bitmap onecopy = bitmap.createbitmap(one.getwidth(), one.getheight(), bitmap.config.argb_8888);      canvas c = new canvas(onecopy);     paint p = new paint();     p.setcolorfilter(new porterduffcolorfilter(ontheflycolorresid, porterduff.mode.src_atop));     c.drawbitmap(one, 0, 0, p);      ...      sld.addstate(new int[]{-statefocused}, new bitmapdrawable(context.getresources(), onecopy)); 

this kind of works, there's 1 tricky thing. image below result while r.drawable.my_drawable png file entirly black 3px transparant border around it.

if add original drawable full black image transparant pixels on side below:

    sld.addstate(new int[]{-statefocused}, context.getresources().getdrawable(r.drawable.my_drawable)); 

and result:

so thinking might wrong onecopy bitmat or drawing on canvas, change code this:

    bitmapfactory.options options = new bitmapfactory.options();     options.inpreferredconfig = bitmap.config.argb_8888;     bitmap 1 = bitmapfactory.decoderesource(context.getresources(), r.drawable.my_drawable, options);      ...      sld.addstate(new int[]{-statefocused}, new bitmapdrawable(context.getresources(), one)); 

so no more transformations of drawable, reading bitmap , transforming drawable again results in strange result:

and want second image custom color applied.

does has idea why strange fade-effect left , right of image?

to apply color filter , change color of drawable find using base drawable grayscale/white best while used in combination mode.multiply porterduff filter.

if want in code fine, best combination, in opinion, have textview defined in xml said white-grayscale background in code can change background color:

<textview     android:id="@+id/mybox"     . . .      android:background="@drawable/box" 

the box drawable can anything, png or xml defining rectangular shape filled solid color white.

int ontheflycolor = 0xaarrggbb; or getresources().getcolor(r.color.red); textview tv = findviewbyid(r.id.mybox); tv.getbackground().setcolorfilter(ontheflycolor, mode.multiply);