Methode bringt NullPointer Exception

import de.htw.age.R;
import de.htw.age.engine.Kino;
import android.app.Activity;
import android.os.Bundle;


public class onePic extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		Kino kino = new Kino(this);
		setContentView(kino);
		kino.addBild(R.drawable.ic_launcher,20,20);
	}
}

*
 * 
 */
package de.htw.age.engine;


import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.view.View;


public class Kino extends View {
	private Canvas canvas;
	private Bitmap bmp;


	public Kino(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
	}
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		this.canvas=canvas;
	}
	
	/**
	 * hinzufuegen einer Grafik
	 * @param bmp Das Bitmap, das uebergeben wird
	 * @param x Koordinate
	 * @param y Koordinate
	 * @param paint einfach null wenn nicht gewünscht
	 */
	public void addBild(int id,float x,float y)
	{
		bmp = BitmapFactory.decodeResource(getResources(),
				id);
		canvas.drawBitmap(bmp, x, y, null);
		invalidate();
	}




}