내장 카메라 어플 불러쓸려다가 직접 프리뷰로 만들게 됬는데 실 기기에서 돌려보니깐 에러가 나더군요...

surfaceview에서 문제가 생긴거 같은데 원인을 모르겠습니다..ㅠㅠ 카메라부분좀 잘 아시는분좀 설명좀 해주세요..

package net.cameraview;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.Size;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class cameraview extends Activity {
 MyCameraSurface mSurface;
 Button mShu;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        mSurface=(MyCameraSurface)findViewById(R.id.surfaceView1);
       
        //오토포커스 시작
        findViewById(R.id.button1).setOnClickListener(new Button.OnClickListener(){
         public void onClick(View v){
          mShu.setEnabled(false);
          mSurface.mCamera.autoFocus(mAutoFocus);
         }
        });
       
        //촬영
       
        mShu=(Button)findViewById(R.id.button2);
        mShu.setOnClickListener(new Button.OnClickListener(){
         public void onClick(View v){
          mSurface.mCamera.takePicture(null, null, mPicture);
         }
        });
    }
    //포커싱 성공시 촬영
    AutoFocusCallback mAutoFocus = new AutoFocusCallback(){
     public void onAutoFocus(boolean successs, Camera camera){
      mShu.setEnabled(successs);
     }
    };
   
    //사진 저장
    PictureCallback mPicture = new PictureCallback(){
     public void onPictureTaken(byte[] data, Camera camera){
      String sd = Environment.getExternalStorageDirectory().getAbsolutePath();
      String path = sd + "/cameratest.jpg";
      
      File file = new File(path);
      try{
       FileOutputStream fos = new FileOutputStream(file);
       fos.write(data);
       fos.flush();
       fos.close();
      }catch(Exception e){
       Toast.makeText(cameraview.this, "파일 저장중 에러 : " + e.getMessage(),0).show();
       return;
      }
     Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
     Uri uri = Uri.parse("file://"+path);
     intent.setData(uri);
     sendBroadcast(intent);
     
     Toast.makeText(cameraview.this, "사진 저장 완료 : "+path, 0).show();
     mSurface.mCamera.startPreview();
     
     }
    };
}
//미리보기 surface 클래스

class MyCameraSurface extends SurfaceView implements SurfaceHolder.Callback{
 Camera mCamera;
 SurfaceHolder mHolder;
 
 public MyCameraSurface(Context context, AttributeSet attrs){
  super(context, attrs);
  mHolder = getHolder();
  mHolder.addCallback(this);
  mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
 }
 
 //surfacer 생성시 카메라 오픈, 미리보기 설정
 public void surfaceCreated(SurfaceHolder holder){
  mCamera = Camera.open();
  try{
   mCamera.setPreviewDisplay(mHolder);
  }catch(IOException e){
   mCamera.release();
   mCamera = null;
  }
 }
 
 //surface 파괴시 카메라도 파괴
 public void surfaceDestroyed(SurfaceHolder holder){
  if(mCamera != null){
   mCamera.stopPreview();
   mCamera.release();
   mCamera = null;
  }
 }
 
 //surface크기가 결정되면 최적의 미리보기 크기 설정
 public void surfaceChange(SurfaceHolder holder, int format, int width, int height){
  Camera.Parameters params = mCamera.getParameters();
  List<Size> arSize = params.getSupportedPreviewSizes();
  if(arSize == null){
   params.setPreviewSize(width, height);
  }else{
   int diff = 10000;
   Size opti = null;
   for(Size s : arSize){
    if(Math.abs(s.height - height)<diff){
     diff = Math.abs(s.height - height);
     opti = s;
    }
   }
  params.setPreviewSize(opti.width, opti.height);
  }
  mCamera.setParameters(params);
  mCamera.startPreview();
 }

 @Override
 public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
  // TODO Auto-generated method stub
  
 }
}