LineDrawable.java

public class LineDrawable extends Drawable {

    private Context context;
    private final Paint paint;

    public LineDrawable(Context context) {
        this.context = context;

        paint = new Paint();
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(Utils.dpToPx(context, 1));
        paint.setColor(Color.parseColor("#e0e0e0"));
    }

    @Override

    public void draw(Canvas canvas) {
        Rect bounds = getBounds();

        canvas.save();
        canvas.drawLine(bounds.left, bounds.centerY(), bounds.right - bounds.left, bounds.centerY(), paint);
        canvas.restore();
    }

    @Override public void setAlpha(int i) {}

    @Override public void setColorFilter(ColorFilter colorFilter) {}

    @Override public int getOpacity() { return PixelFormat.OPAQUE; }
}