hi
I'm new to android and I'm developing a camera app, my code (which so
far just starts preview!) works fine on emulator, but on real device
(nexus one) i have got "unexpectedly stopped". i will be thankful if
somebody help me, here is my code:

package com.camera;

import java.io.IOException;

import android.app.Activity;
import android.os.Bundle;

import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;

public class camera extends Activity implements
SurfaceHolder.Callback{

    public Camera mCamera;

    boolean mPreviewRunning=false;

     public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFormat(PixelFormat.TRANSLUCENT);


        setContentView(R.layout.main);

        SurfaceView mSurfaceView =
(SurfaceView)findViewById(R.id.preview);
        SurfaceHolder mSurfaceHolder = mSurfaceView.getHolder();
        mSurfaceHolder.addCallback(this);
 
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int
w, int h) {
         if (mPreviewRunning) {
            mCamera.stopPreview();
        }

        Camera.Parameters p = mCamera.getParameters();
        p.setPreviewSize(w, h);
        mCamera.setParameters(p);
        try {
         mCamera.setPreviewDisplay(holder);
        } catch (IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
        }
        mCamera.startPreview();
        mPreviewRunning = true;
    }

    @Override
    public void surfaceCreated(SurfaceHolder mSurfaceHolder) {
        // TODO Auto-generated method stub
        mCamera=Camera.open();
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder arg0) {
        // TODO Auto-generated method stub
        if (mPreviewRunning) {
            mCamera.stopPreview();
        }
        mPreviewRunning=false;
        mCamera.release();

    }
}

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