Canvas zeichnet nicht

@Override
        public boolean dispatchTouchEvent(MotionEvent event) {
            int action = event.getAction();
            if (action == MotionEvent.ACTION_DOWN) {
                Log.i("Debug", "ACTION_DOWN wurde ausgeführt");
                float xView = this.getX();
                float yView = this.getY();


                float xTouch = event.getX();
                float yTouch = event.getY();


                int xCircle = ks.root.getDaten().getX();
                int yCircle = ks.root.getDaten().getY();
                int radius = ks.root.getDaten().getRadius();


                /**
                 * Überprüfen, ob getroffen
                 */
                boolean getroffen = true;//(xTouch - (xView + radius)) * (xTouch - (xView + radius)) + (yTouch - (yView + radius)) * (yTouch - (yView + radius)) <= radius * radius;


                if (getroffen) {
                    Log.i("Hit", "Kreis getroffen");
                    ks.einfuegen(new Kreis(x, y));
                    ks.ausgeben(canvas);
                    ks.root.getDaten().setHit();
                } else {
                    if (!alreadyFailed) {
                        alreadyFailed = true;
                    } else {
                        //SPIEL BEENDET!
                    }
                }
            }
            return true;
        }

package de.dechasa.liste;




import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;


import java.util.Random;


import de.dechasa.squarebrains.MainActivity;


public class Kreis implements Datenelement{


    public final int RADIUS = 60;


    public boolean hit = false;


    int red, green, blue, alpha;


    int x, y;
    Paint paint;
    final Paint UMRANDUNG = new Paint();
    final Paint GETROFFEN = new Paint();


    public Kreis(int maxWidth, int maxHight){
        paint = createRandomPaint();
        UMRANDUNG.setColor(Color.BLACK);
        GETROFFEN.setColor(Color.WHITE);


        x = new Random().nextInt(maxWidth) + 1;
        y = new Random().nextInt(maxHight) + 1;
    }


    public Paint createRandomPaint(){
        red = new Random().nextInt((255 - 0) + 1);
        green = new Random().nextInt((255 - 0) + 1);
        blue = new Random().nextInt((255 - 0) + 1);
        alpha = new Random().nextInt((255 - 0) + 1);


        Paint paint = new Paint();
        paint.setColor(Color.argb(alpha, red, green, blue));
        return paint;
    }


    public void setHit(){
        hit = true;
    }


    public void ausgeben(Canvas c){
        if(!hit){
            c.drawCircle(x, y, RADIUS + 2, UMRANDUNG);
            c.drawCircle(x, y, RADIUS, paint);
        }   else{
            getroffen(c);
            hit = false;
        }


    }


    public void getroffen(Canvas c){
        c.drawCircle(x, y, RADIUS + 2, UMRANDUNG);
        c.drawCircle(x, y, RADIUS, GETROFFEN);
    }


    public int getX(){ return x;}
    public int getY(){ return y;}
    public int getRadius(){ return RADIUS;}
}