<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >

<gradient
    android:id="@+id/radGrad"
    android:centerColor="#ecd473"
    android:centerY="0%"
    android:centerX="0%"
    android:endColor="#000000"
    android:gradientRadius="600"
    android:innerRadiusRatio="2"
    android:startColor="#f9f7a8"
    android:type="radial" >
</gradient>
</shape>

View backgroundView;
GradientDrawable background;
background = this.getWindow().getDecorView();

submitButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            color = new int[3];
            color[0]=0xecd473; //these values will eventually be changed by the slider
            color[1]=0xf9f7a8;
            color[2]=0xffffff;
            background = new GradientDrawable(GradientDrawable.Orientation.BL_TR, color);
            background.mutate();
            background.setGradientType(GradientDrawable.RADIAL_GRADIENT);
            background.setGradientRadius(600);
            background.setGradientCenter(0,0);
            background.setShape(GradientDrawable.RECTANGLE);
            background.setCornerRadius(50f);
            background.setColors(color);
            backgroundView.setBackground(background);
            progressTextView.setText("Hue: " + hueValue + " Brightness: " + brightValue + " Saturation: " + satValue);
        }
    });

}