Set android shape color programmatically -

i editing make question simpler, hoping helps towards accurate answer.

say have following oval shape:

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">     <solid android:angle="270"            android:color="#ffff0000"/>     <stroke android:width="3dp"             android:color="#ffaa0055"/> </shape> 

how set color programmatically, within activity class?

note: answer has been updated cover scenario background instance of colordrawable. tyler pfaff, pointing out.

the drawable oval , background of imageview

get drawable imageview using getbackground():

drawable background = imageview.getbackground(); 

check against usual suspects:

if (background instanceof shapedrawable) {     // cast 'shapedrawable'     shapedrawable shapedrawable = (shapedrawable) background;     shapedrawable.getpaint().setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } else if (background instanceof gradientdrawable) {     // cast 'gradientdrawable'     gradientdrawable gradientdrawable = (gradientdrawable) background;     gradientdrawable.setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } else if (background instanceof colordrawable) {     // alpha value may need set again after call     colordrawable colordrawable = (colordrawable) background;     colordrawable.setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } 

compact version:

drawable background = imageview.getbackground(); if (background instanceof shapedrawable) {     ((shapedrawable)background).getpaint().setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } else if (background instanceof gradientdrawable) {     ((gradientdrawable)background).setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } else if (background instanceof colordrawable) {     ((colordrawable)background).setcolor(contextcompat.getcolor(mcontext,r.color.colortoset)); } 

note null-checking not required.

however, should use mutate() on drawables before modifying them if used elsewhere. (by default, drawables loaded xml share same state.)