Anroid实现照相代码

public class MyCamera extends Activity  implements Callback {private SurfaceView m_surfaceView = null;private SurfaceHolder m_surfaceFolder = null;private Button m_btnCamera = null;private Button m_btnExit = null;private Camera m_Camera;private int m_iWidth = 600;private int m_iheight = 360;private String m_sFilePath = "";private String m_sFileName = "";/** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)     {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                 m_surfaceView = (SurfaceView)findViewById(R.id.sfvCamera);        m_btnCamera = (Button)findViewById(R.id.btnCamera);        m_btnExit = (Button)findViewById(R.id.button1);                //Take picture        m_btnCamera.setOnClickListener(new OnClickListener()        {        public void onClick(View v) {m_Camera.autoFocus(m_AutoFocusCallBack);}                });                //Get holder according to SurfaceView        m_surfaceFolder = m_surfaceView.getHolder();        m_surfaceFolder.addCallback(this);        m_surfaceFolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);                 //Set the storage path of picture         this.setPicPath();            }public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {Camera.Parameters parameters = m_Camera.getParameters();//Set the format of the pictureparameters.setPictureFormat(PixelFormat.JPEG);Size size = parameters.getPreviewSize();if (size.width != 640 && size.height != 480){parameters.setPreviewSize(m_iWidth, m_iheight);// set the size}m_Camera.setParameters(parameters);try {m_Camera.setPreviewDisplay(arg0);} catch (IOException e) {e.printStackTrace();m_Camera.release(); m_Camera = null; }m_Camera.startPreview();}    public void surfaceCreated(SurfaceHolder arg0) {//Open cameram_Camera = Camera.open();}public void surfaceDestroyed(SurfaceHolder arg0) {//Stop taking picturem_Camera.stopPreview();//Release resourcem_Camera.release();m_Camera = null;}private AutoFocusCallback m_AutoFocusCallBack = new AutoFocusCallback() {public void onAutoFocus(boolean success, Camera camera) {m_Camera.takePicture(null, null, null, m_PictureCallback);}};PictureCallback m_PictureCallback = new PictureCallback() {public void onPictureTaken(byte[] data, Camera camera) {if (data != null) {//Save bitmap into SDCardsavePictureInSDCard(data);}}};private boolean setPicPath() {boolean bRet = true;File fileDir = null; //Judge whether SdCard existsboolean bSdCardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED); if (bSdCardExist) //Exist{ //Get the root pathfileDir = Environment.getExternalStorageDirectory(); } else{return false;}//Set the storage path of picturem_sFilePath = fileDir.toString() + "/ajis/pic/";//Create pathFile file = new File(m_sFilePath);if (!file.exists()) {file.mkdirs();}return bRet;}private void savePictureInSDCard(byte[] bytes){//File path and namem_sFileName= DateFormat.format(getResources().getString(R.string.strFormat_yyyyMMddhhMMss), Calendar.getInstance(Locale.CHINA))+ ".jpg";//Create fileFile file = new File(m_sFilePath + m_sFileName);if (!file.exists()) {try {file.createNewFile();}catch (IOException e) {e.printStackTrace();}}FileOutputStream out = null; try {out = new FileOutputStream(m_sFilePath + m_sFileName);} catch (FileNotFoundException e) {e.printStackTrace();}try {out.write(bytes);} catch (IOException e) {e.printStackTrace();}try {out.close();} catch (IOException e) {e.printStackTrace();}}}