Thread: Android code is crashing.

So I am making an android breakout game to get situated with java and the android API. I have very similar code to what they show on this webpage (SensorManager | Android Developers), but my code crashes. I do implement the class over in another file which is also attached. Can anyone point me in the direction as to why this is crashing? Is there some command I need to call first before I get a system service?

package com.example.breakout;
 
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
 
public class UpdateAccel extends Activity implements SensorEventListener
{
	private boolean ENABLED = false;
	private Sensor accel;
	private SensorManager sm;
	float aX = 0,aY = 0,aZ = 0;
 
	public UpdateAccel()
	{
	   sm = (SensorManager) getSystemService(SENSOR_SERVICE);    //This line here crashes if I comment it out all runs well.
	   /*if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size() == 0)
	   {
		   ENABLED = false;   //no accelerometer installed!
 
	   }else
	   {
		   ENABLED = true;    //accelerometer is installed!
		   accel = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
		   if(!sm.registerListener(this, accel,SensorManager.SENSOR_DELAY_GAME))
		   {
			   ENABLED = false;
			   //something went wrong during registering.
		   }
	   }*/
 
	}
 
	public float getXacc()
	{
		if(!ENABLED)return 0;
		return aX;
	}
	public float getYacc()
	{
		if(!ENABLED)return 0;
		return aY;
	}
	public float getZacc()
	{
		if(!ENABLED)return 0;
		return aZ;
	}
 
    @Override
	public void onAccuracyChanged(Sensor arg0, int arg1) 
	{
		// TODO Auto-generated method stub
	}
 
	@Override
	public void onSensorChanged(SensorEvent arg0) 
	{
		if(ENABLED)
		{
			aX = (float)(arg0.values[0]/9.8);
			aY = (float)(arg0.values[1]/9.8);
			aZ = (float)(arg0.values[2]/9.8);
			if(aX < -1) aX = -1;
			if(aY < -1) aY = -1;
			if(aZ < -1) aZ = -1;
 
			if(aX > 1) aX = 1;
			if(aY > 1) aY = 1;
			if(aZ > 1) aZ = 1;
		}
 
	}
}

package com.example.breakout;
 
 
 
import android.content.Context;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
 
 
public class GameView extends SurfaceView implements SurfaceHolder.Callback 
{
    private SpriteObject[] Bricks = new SpriteObject[10];
	private SpriteObject Ball;
	private SpriteObject Paddle;
	private GameLogic mGameLogic;
	UpdateAccel myAccel;
 
	public GameView(Context context) 
	{
		super(context);
		getHolder().addCallback(this);
		myAccel = new UpdateAccel();
 
		for(int i = 0; i < 10; i++)
		{
			Bricks[i] = new SpriteObject(BitmapFactory.decodeResource(getResources(), R.drawable.redbrick), 10+i*20, 50);
		}
		Ball = new SpriteObject(BitmapFactory.decodeResource(getResources(), R.drawable.ball), 100, 100);
		Ball.setMoveY(1);
		Ball.setMoveX(1);
		Paddle = new SpriteObject(BitmapFactory.decodeResource(getResources(), R.drawable.paddle), getWidth()/2, getHeight()/2);
 
		mGameLogic = new GameLogic(getHolder(), this);
 
		setFocusable(true);
	}
 
	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
	}
 
	@SuppressWarnings("static-access")
	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		mGameLogic.setGameState(mGameLogic.RUNNING);
		mGameLogic.start();
	}
 
	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
	}
 
 
 
	public void onDraw(Canvas canvas) 
	{
		canvas.drawColor(Color.BLACK);
		for(int i = 0;i < 10;i++)
		{
			if(Bricks[i] != null)
			{
				Bricks[i].draw(canvas);
			}
		}
		Paddle.draw(canvas);
		Ball.draw(canvas);
	}
 
	public void update(int adj_mov) 
	{
		//handles when ball hits side of the screen
		if(Ball.getX() <= 5 && Ball.getMoveX() < 0)Ball.setMoveX(Ball.getMoveX() * -1);
		if(Ball.getX() >= getWidth() - 5 && Ball.getMoveX() > 0)Ball.setMoveX(Ball.getMoveX() * -1);
		if(Ball.getY() <= 5 && Ball.getMoveY() < 0)Ball.setMoveY(Ball.getMoveY() * -1);
		//done with screen
 
		//for testing bounces.
		if(Ball.getY() >= getHeight() - 5 && Ball.getMoveY() > 0)Ball.setMoveY(Ball.getMoveY()*-1);
		//end testing
 
		Ball.update(adj_mov);
 
		Paddle.setX((int)(getWidth()/2 + myAccel.getXacc()*(getWidth()/2)));
		Paddle.setY(getHeight()-15);
 
 
	}
 
 
}