import java.io.BufferedOutputStream;  
import java.io.File;  
import java.io.FileNotFoundException;  
import java.io.FileOutputStream;  
import java.io.IOException;  
  
import android.content.Context;  
import android.graphics.Bitmap;  
import android.graphics.BitmapFactory;  
import android.graphics.Canvas;  
import android.graphics.PixelFormat;  
import android.hardware.Camera;  
import android.util.Log;  
import android.view.KeyEvent;  
import android.view.SurfaceHolder;  
import android.view.SurfaceView;  
  

public class PreView extends SurfaceView implements SurfaceHolder.Callback {  
  
    private SurfaceHolder holder = null;  
    private Camera mCamera = null;  
    private Bitmap mBitmap = null;  
  
    public PreView(Context context) {  
        super(context);  
        Log.i("TAG", "PreView()");  
        // TODO Auto-generated constructor stub  
        holder = this.getHolder();  
        holder.addCallback(this);  
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);  
    }  
  
    public void surfaceChanged(SurfaceHolder holder, int format, int width,  
            int height) {  
        Log.i("TAG", "surfaceChanged");  
        // TODO Auto-generated method stub  
        Camera.Parameters parameters = mCamera.getParameters();  
        parameters.setPictureFormat(PixelFormat.JPEG);
        parameters.setPreviewSize(320, 480);
//      parameters.setPictureSize(320, 480);
        mCamera.setParameters(parameters);  
        mCamera.startPreview();
    }  
  
    public void surfaceCreated(SurfaceHolder holder) {  
        Log.i("TAG", "surfaceCreated");  
        // TODO Auto-generated method stub  
        mCamera = Camera.open();
        try {  
            mCamera.setPreviewDisplay(holder);
        } catch (IOException e) {  
            mCamera.release();
            mCamera = null;  
        }  
    }  
  
    public void surfaceDestroyed(SurfaceHolder holder) {  
        Log.i("TAG", "surfaceDestroyed");  
        // TODO Auto-generated method stub  
        mCamera.stopPreview();
        mCamera = null;  
    }  
  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        if(keyCode==KeyEvent.KEYCODE_DPAD_CENTER){  
            if(mCamera !=null){  
                mCamera.takePicture(null, null,pic);  
            }  
        }  
        return super.onKeyDown(keyCode, event);  
    }  
    
    public Camera.PictureCallback pic = new Camera.PictureCallback(){  
  
        public void onPictureTaken(byte[] data, Camera camera) {  
            // TODO Auto-generated method stub  
            mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);  
            File f = new File(android.os.Environment.getExternalStorageDirectory()+"/camera1.jpg");  
            try {  
                BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(f));  
                mBitmap.compress(Bitmap.CompressFormat.JPEG, 80, os);  
                os.flush();  
                os.close();  
                Canvas canvas = holder.lockCanvas();  
                canvas.drawBitmap(mBitmap, 0, 0, null);  
                holder.unlockCanvasAndPost(canvas);  
            } catch (FileNotFoundException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            } catch (IOException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
        }  
          
    };  
}  





///**************************************************CameraApplication

import android.app.Activity;  
import android.os.Bundle;  
import android.view.KeyEvent;  
import android.view.Window;  
  
public class CameraApplication extends Activity {  
    /** Called when the activity is first created. */  
    private PreView pv = null;  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);  
        pv = new PreView(this);  
        setContentView(pv);  
    }  
  
    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        // TODO Auto-generated method stub  
        return pv.onKeyDown(keyCode, event);  
    }  
      
}  




///****************************************************AndroidManifest XML:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.camapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.CAMERA" />   
 <uses-feature android:name="android.hardware.camera" />   
 <uses-feature android:name="android.hardware.camera.autofocus" />  

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".CameraApplication"
            android:label="@string/title_activity_starting" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>