Zeichnen auf Canvas über aufruf einer Klassenmethode:

public class Striche extends View{
	Paint paint;
	Canvas canvas;
	int breite;
	int hoehe;
	boolean isInitialized;
	Bitmap bitmap;	 
	
	
	public Striche(Context context, AttributeSet attrs) {
		super(context, attrs);			 


		paint = new Paint();
	    paint.setColor(Color.BLACK);
	    paint.setAntiAlias(true);
	    paint.setStyle(Paint.Style.FILL_AND_STROKE);
	     
	     isInitialized = false;
	}
	 private void init()
	   {
	     bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.RGB_565);
	     
	     canvas = new Canvas();
	     isInitialized = true;


	  }
	
	@Override	
	protected void onDraw(Canvas canvas) {
		if (!isInitialized)
		       init();
		Bitmap eBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.deckel) ;
		        
       
		canvas.drawBitmap(eBitmap ,0,0,  null) ;
		breite = canvas.getWidth();
		hoehe = canvas.getHeight();		
		Paint bild = new Paint();		


		paint.setColor(R.color.kulli);
		paint.setStyle(Paint.Style.STROKE);
		paint.setStrokeWidth(6);		
		paint.setAntiAlias(true);


		canvas.drawLine(40,40,60,60, paint);
		


	}
	
	public void addLine(int ort, int count){
		paint = new Paint();
		canvas.drawLine(0,0,77,132,paint);
		paint.setColor(R.color.schwarz);
		canvas.drawLine(40,40,70,70, paint);
		paint.setColor(R.color.kulli);
	}
}

Striche kulli;
LinearLayout layout;
..onCreate(){
        kulli = new Striche(this, null);
        layout = (LinearLayout)findViewById(R.id.lay);
        layout.addView(kulli);
...
}
onClickListener(){
..
kulli.addLine(1, 1);
}