android - Setting widget background to programmaticaly generated gradient -

i'm struggling making widget pretty, widget fights ;(

i have problem setting widget layout background generated linear gradient.

for now, have found how generate linear gradient custom "weigth" of colors gradient:

public static paintdrawable createlineargradient(final int left, final int top, final int right, final int bottom,                                                   final int[] colors, final float[] positions) {     shapedrawable.shaderfactory shaderfactory = new shapedrawable.shaderfactory()     {         @override         public shader resize(int width, int height)         {             lineargradient lg = new lineargradient(left, top, right, bottom, colors, positions, shader.tilemode.repeat);             return lg;         }     };      paintdrawable gradient = new paintdrawable();     gradient.setshape(new rectshape());     gradient.setshaderfactory(shaderfactory);      return gradient; } 

and here way set widget background drawable drawable folder:

int backgroundid =  getdrawablebyname(context, "round_transparrent_background"); remoteviews.setint(r.id.mainlayout, "setbackgroundresource", backgroundid); 

i need way write command following:

drawable background =  createlineargradient(params ... ); remoteviews.setint(r.id.mainlayout, "setbackgroundresource", background); 

remoteviews inherently limited functions. makes sense when consider information pass remoteviews needs travel across processes, , not classes/data types supported.

there no way pass arbitrary drawable object remoteviews -- none of methods support it, , drawable in general not class data can marshalled across processes. reason works drawable resources resource id integer, , android knows how inflate them bitmaps (for pngs) or respective drawable implementations (for declared xml).

as see it, strategy might work draw gradient bitmap using canvas apis , use imageview in appwidget act background. call remoteviews.setimageviewbitmap() set content of imageview.