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* @Since:-8-11 * @Version:1.1.0*/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() {@Overridepublic 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 * @Since:-8-11 * @Version:1.1.0 * @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:-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* @Since:-8-11 * @Version:1.1.0*/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)* @Since:-8-12 * @Version:1.1.0 * @param mIsOpenFlashMode*/public void setIsOpenFlashMode(boolean mIsOpenFlashMode) {if(mIsOpenFlashMode)this.isOpenFlashMode = Camera.Parameters.FLASH_MODE_ON;elsethis.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 * @Since:-8-11 * @Version:1.1.0 * @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* @Since:-8-11 * @Version:1.1.0 * @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* @Since:-8-31 * @Version:1.1.0 * @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* @Since:-8-12 * @Version:1.1.0*/private void screenDirectionListener(){OrientationEventListener mOrEventListener =new OrientationEventListener(getContext()) {@Overridepublic 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();}
