Android studio app funktioniert nicht...

package com.youknownow.panjutorials;

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class GameActivity extends Activity {

    @override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new GameView(this));
    }
}

package com.youknownow.panjutorials;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;

/**
* Created by abbas on 18.09.2016.
*/
public class GameView extends SurfaceView {

    private SurfaceHolder surfaceHolder;
    private Bitmap bmp;

    public GameView(Context context) {
        super(context);
        surfaceHolder = getHolder();

        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            [USER=3517]@override[/USER]
            public void surfaceCreated(SurfaceHolder holder) {

            }

            [USER=3517]@override[/USER]
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });
        bmp = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
    }
    @override
    protected void onDraw(Canvas canvas){
        canvas.drawColor(Color.DKGRAY);
        canvas.drawBitmap(bmp, 25, 66, null);


    }

}

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>
    <color name="grey">#B8B3B2</color>
</resources>