Skalierungsproblem mit ImageView und Drawable

        <ImageView
           android:layout_width="match_parent"
           android:layout_height="250dip"
           android:id="@+id/tvWeekStats"
           android:layout_below="@+id/llTimer"
           android:layout_margin="5dip"
           android:scaleType="fitXY"
           android:adjustViewBounds="true"
           />

public class WeekdayDrawable extends Drawable {

    private Paint paint;
    
    public WeekdayDrawable() {
        this(new StatsWeekday());
    }

    public WeekdayDrawable(StatsWeekday ownTeam) {        
        paint = new Paint();
        paint.setStyle(Style.FILL);
    }

    @Override
    public void draw(Canvas canvas) {
        try {
            canvas.save();
            
            paint.setColor(Color.WHITE);
            canvas.drawLine(0, 0, 700, 0, paint);
            canvas.drawLine(0, 10, 600, 10, paint);
            canvas.drawLine(0, 20, 500, 20, paint);
            canvas.drawLine(0, 30, 400, 30, paint);
            canvas.drawLine(0, 40, 300, 40, paint);

            canvas.drawRect(33, 60, 77, 77, paint );
            paint.setColor(Color.YELLOW);
            canvas.drawRect(33, 33, 77, 60, paint );            
            paint.setColor(Color.WHITE);
            paint.setTextSize(20);
            
            canvas.drawText("Some Text", 10, 25, paint);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void setAlpha(int alpha) {
        // Has no effect
    }

    @Override
    public void setColorFilter(ColorFilter cf) {
        // Has no effect
    }

    @Override
    public int getOpacity() {
        // Not Implemented
        return 0;
    }
}

            Drawable weekStats;
            weekStats = new WeekdayDrawable(weekDayData);
            
            
            tvWeekStats.setImageDrawable(weekStats);