Changing shape in appWidget

Question

I'm trying to change the color in the shape of an appWidget. I have a rectangle with corners, my goal is to change the background(solid) color and the border colors.

My widget layout is a RelativeLayout with an ImageView for the background, the src attribute of this ImageView is this shape :

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
  <corners
      android:radius="5dp"
      android:topRightRadius="5dp"
      android:bottomRightRadius="5dp"
      android:bottomLeftRadius="5dp" />
  <stroke
      android:width="1dp"
      android:color="@android:color/white" />
  <solid android:color="@color/transparent"/>
</shape>

Here is what I'm trying to do when I try to change the background color :

RoundRectShape sd = new RoundRectShape(new float[]{30,30,30,30,30,30,30,30}, null, null);
bmp_bg = Bitmap.createBitmap(200, 20, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bmp_bg);
Paint p = new Paint();
p.setColor(0xFF0000FF);
sd.draw(c, p);
remoteViews.setImageViewBitmap(R.id.imageClock, bmp_bg);

But the background doesn't change. Is this a good way to do that ? Or am I completly wrong ? thx

EDIT : I tried this too without any effect :

CustomShapeClockWidget cscw = new CustomShapeClockWidget(0xFF0000FF, 0xFFFF0000);
bmp_bg = Bitmap.createBitmap(200, 20, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bmp_bg);
cscw.draw(c);
remoteViews.setImageViewBitmap(R.id.imageClock, bmp_bg);

with the class CustomShapeClockWidget being :

public class CustomShapeClockWidget extends ShapeDrawable {

    private int bgColor, strokeColor;
    private Paint fillPaint, strokePaint;

    public CustomShapeClockWidget(int bgColor, int strokeColor){
        this.bgColor = bgColor;
        this.strokeColor = strokeColor;
    }

    @Override
    protected void onDraw(Shape shape, Canvas canvas, Paint paint){
        fillPaint = this.getPaint();
        strokePaint = new Paint(fillPaint);

        fillPaint.setColor(bgColor);

        strokePaint.setStyle(Paint.Style.STROKE);
        strokePaint.setStrokeWidth(1.0f);
        strokePaint.setColor(strokeColor);

        shape.draw(canvas, fillPaint);
        shape.draw(canvas, strokePaint);
    }

}

Answer 1

(Late answer, hope it helps anyone struggling with shapes in appwidgets like me)

The first code you wrote is almost complete, it just lacks the call to resize(float, float) necessary before draw(Canvas, Paint). There is no need to create a custom shape object.

The SDK documentation says this for RoundRectShape and other shapes:

Draw this shape into the provided Canvas, with the provided Paint. Before calling this, you must call resize(float, float).