Android surfaceview 自定义相机 拍照（闪光灯、前后摄像头）

在我们app中经常会调用相机进行拍照，然后把拍下来的图片保存在本地，再上传到服务端，网上有不少自定义的相机，也下载了不少，但是效果还是不满意，所以决定自定义下，不多说了，直接上代码：

public class CameraViews extends SurfaceView implements SurfaceHolder.Callback{ private String TAG=Camera.class.getName(); private Activity mActivity=null; private Camera camera=null; private SurfaceHolder holder=null; /* 是否打开前置相机,true为前置,false为后置 */ private boolean mIsFrontCamera=false; /是否开启闪光灯 默认关闭闪光灯/ private String isOpenFlashMode= Camera.Parameters.FLASH_MODE_OFF; private int curRotation=0; private CameraCallback mCallback=null;public CameraViews(Context context){    super(context);    initSurface();}public CameraViews(Context context, AttributeSet attrs) {    super(context, attrs);    initSurface();}public void setCurActivity(Activity activity){    this.mActivity=activity;}/** * @Description:  初始化surface */private void initSurface(){    holder =getHolder();//获得句柄    holder.addCallback(this);//添加回调    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//surfaceview不维护自己的缓冲区，等待屏幕渲染引擎将内容推送到用户面前}@Overridepublic void surfaceCreated(SurfaceHolder holder) {    try {        if(camera==null){            openCamera();        }        initCameraParams(mActivity);        camera.setPreviewDisplay(getHolder());        camera.startPreview();    } catch (Exception e) {        Toast.makeText(getContext(), "打开相机失败", Toast.LENGTH_SHORT).show();        Log.e(TAG,e.getMessage());    }}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {//try{    //camera.stopPreview();    //摄像头画面显示在Surface上    //camera.setPreviewDisplay(holder);    //initCameraParams(mActivity);    //camera.startPreview();   //}catch(IOException e) {    // if (camera != null) camera.release();    //camera = null;//}    //注意:这里不能进行重新初始化相机，然后在预览，不然进行横纵拍照,照出来的图片旋转的角度会对应不上,所以这里直接开启预览就好    camera.startPreview();   }@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {    camera.stopPreview();    camera.release();    camera=null;    holder=null;}@SuppressWarnings("unused")private PictureCallback pictureCallback=new PictureCallback() {    @Override    public void onPictureTaken(byte[] data, Camera camera) {        saveCameraImage(data, camera);        //这句话也很重要,是将你拍照成功后，图片可以在相册中查看到。(只不过我把这句话封装到保存图片中，保存图片顺带加载到相册)。        //MediaStore.Images.Media.insertImage(getContentResolver(), mBitmap, "", "");        //重新打开预览图，进行下一次的拍照准备        camera.startPreview();    }};/** * @Description:设置相机预览  * @param activity **/public void setCameraPreView(){    if(camera!=null){        camera.stopPreview();        initCameraParams(mActivity);        try {            camera.setPreviewDisplay(getHolder());            camera.startPreview();        } catch (IOException e) {            Log.e(">>>>>","相机转换失败!"+e.getMessage());        }    }else{        Log.e(">>>>>","相机初始化失败!");    }}/** * @Description:保存拍照的图片 * @Since:2015-8-11   * @Version:1.1.0   * @param data * @param camera */private void saveCameraImage(byte[] data, Camera camera) {    if(data==null){        Log.e(TAG, "获取图片流失败,拍照失败,请重试！");        return;    }    if(isFrontCamera()){        if(curRotation==90){            curRotation=270;        }else if(curRotation==270){            curRotation=90;        }    }    Bitmap thumbBM=null;    thumbBM=BitmapUtils.getInstance().save(mActivity,data,curRotation);    mCallback.onCameraCallback(thumbBM);    thumbBM=null;}/** * @Description:设置相机参数 */public void initCameraParams(Activity activity){    Camera.Parameters parameters = camera.getParameters();    // 选择合适的预览尺寸       List<Camera.Size> sizeList = parameters.getSupportedPreviewSizes();    if (sizeList.size()>0) {        Size cameraSize=sizeList.get(0);        //预览图片大小        parameters.setPreviewSize(cameraSize.width, cameraSize.height);    }    //设置生成的图片大小    sizeList = parameters.getSupportedPictureSizes();    if (sizeList.size()>0) {        Size cameraSize=sizeList.get(0);        for (Size size : sizeList) {            //小于100W像素            if (size.width*size.height<100*10000) {                cameraSize=size;                break;            }        }        parameters.setPictureSize(cameraSize.width, cameraSize.height);    }    //设置图片格式    parameters.setPictureFormat(ImageFormat.JPEG);           parameters.setJpegQuality(100);    parameters.setJpegThumbnailQuality(100);    //自动聚焦模式    parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);    parameters.setFlashMode(getIsOpenFlashMode());    //curRotation=getPreviewDegree();    screenDirectionListener();    //Log.e(">>>>>","curRotation:"+curRotation);    //parameters.setRotation(curRotation);//生成的图片转90°    //camera.setDisplayOrientation(curRotation);//预览转90°预览图片旋转90°    //camera.setDisplayOrientation(getPreviewDegree());//预览旋转90°    camera.setDisplayOrientation(90);    camera.setParameters(parameters);}public String getIsOpenFlashMode() {    return isOpenFlashMode;}/** * @Description:  设置开启闪光灯(重新预览)  * @param mIsOpenFlashMode */public void setIsOpenFlashMode(boolean mIsOpenFlashMode) {    if(mIsOpenFlashMode)        this.isOpenFlashMode = Camera.Parameters.FLASH_MODE_ON;    else        this.isOpenFlashMode =  Camera.Parameters.FLASH_MODE_OFF;;    setCameraPreView();//重新预览相机}/**   *   根据当前照相机状态(前置或后置)，打开对应相机 */private boolean openCamera()  {    if (camera != null) {        camera.stopPreview();        camera.release();        camera = null;    }    if(mIsFrontCamera){        Camera.CameraInfo cameraInfo=new CameraInfo();        for (int i = 0; i < Camera.getNumberOfCameras(); i++) {            Camera.getCameraInfo(i, cameraInfo);            if(cameraInfo.facing==Camera.CameraInfo.CAMERA_FACING_FRONT){                try {                    camera=Camera.open(i);                } catch (Exception e) {                    camera =null;                    return false;                }            }        }    }else {        try {            camera=Camera.open();        } catch (Exception e) {            camera =null;            return false;        }    }    return true;}/** * @Description:获取相机摄像头个数    * @return */public int getCameraCount(){    return Camera.getNumberOfCameras();//得到摄像头的个数}private boolean isFrontCamera(){    return mIsFrontCamera;}/** * @Description:转换前置和后置照相机  * @return */public boolean switchCamera(){    mIsFrontCamera=!mIsFrontCamera;    openCamera();    if(camera!=null){        initCameraParams(mActivity);        //updateCameraOrientation();        try {            camera.setPreviewDisplay(getHolder());            camera.startPreview();        } catch (IOException e) {            Log.e(">>>>>","相机转换失败!"+e.getMessage());        }    }    return mIsFrontCamera;}/** * @Description:  拍照  * @param mCameraCallback */public void takePhoto(CameraCallback mCameraCallback){    try {        initSurface();        initCameraParams(mActivity);        camera.takePicture(null, null, pictureCallback);//将拍摄到的照片给自定义的对象        this.mCallback=mCameraCallback;    } catch (Exception e) {        Toast.makeText(mActivity,"初始化相机失败!",Toast.LENGTH_SHORT).show();    }}public interface CameraCallback{    void onCameraCallback(Bitmap bitmap);}/** * @Description:  监听屏幕的旋转方向 */private void screenDirectionListener(){    OrientationEventListener mOrEventListener =new OrientationEventListener(getContext()) {        @Override        public void onOrientationChanged(int rotation) {            //getScreenDirect();             if (((rotation >= 0) && (rotation <= 45)) || (rotation >= 315)||((rotation>=135)&&(rotation<=225))){////portrait             } else if (((rotation > 45) && (rotation < 135))||((rotation>225)&&(rotation<315))) {//landscape             }            if (((rotation >= 0) && (rotation <= 45)) || (rotation > 315)){//纵屏向上                rotation=90;            }else if ((rotation > 45) && (rotation <= 135))  {//横屏向右                rotation=180;            }            else if ((rotation > 135) && (rotation <= 225)) {//纵屏向下                rotation=270;            }             else if((rotation > 225) && (rotation <= 315)) { //横屏向左                rotation=0;            }else {                rotation=0;            }            curRotation=rotation;        }    };    mOrEventListener.enable();}