android简单的自定义相机
来源：互联网 发布：西安天睿软件 编辑：程序博客网 时间：2024/04/29 21:27
android简单的自定义相机
项目需求
公司手环有一个功能是点击手环（手环发送命令给手机）手机自动拍照，如果是调用系统相机不知道代码中怎么自动点击拍照键（毕竟系统功能全，知道的同学还望告知一二），所以只好自己写个最简单的相机了，此相机只拍照没其他功能（技术太菜了其他不会整），虽然功能简单，坑也不少啊！
代码
public class CameraActivity extends BaseActivity implements SurfaceHolder.Callback, View.OnClickListener { @BindView(R.id.surfaceView) SurfaceView surfaceView; //照片缩略图 @BindView(R.id.camera_photo) FullPhotoView cameraPhoto; //闪光灯图片 @BindView(R.id.flash) ImageView flash; //导航栏 @BindView(R.id.common_top_bar) CommonTopBar mCommonTopBar; private SurfaceHolder mHolder; private int mCameraId = 0; private Camera mCamera; //屏幕宽高 private int screenWidth; //延迟时间 private boolean isview = false; private int picHeight; //闪光灯图标 private static final int[] FLASH_ICONS = { R.drawable.ic_flash_off, R.drawable.ic_flash_on, R.drawable.ic_flash_auto, }; //闪光灯模式 0:关闭 1: 开启 2: 自动 private int light_num = 2; private static final String[] FLASH_OPTIONS = { Camera.Parameters.FLASH_MODE_OFF, Camera.Parameters.FLASH_MODE_TORCH, Camera.Parameters.FLASH_MODE_AUTO, }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_camera); //状态栏工具 StatusBarUtil.setColor(this, getResources().getColor(R.color.transparent_22000000), 0); initView(); EventBus.getDefault().register(this); } private void initView() { mHolder = surfaceView.getHolder(); mHolder.addCallback(this); DisplayMetrics dm = mContext.getResources().getDisplayMetrics(); screenWidth = dm.widthPixels; } @Override public void initParams() { super.initParams(); mCommonTopBar.setUpNavigateMode(); mCommonTopBar.setTitle(R.string.activity_camera); mCommonTopBar.setUpImgOption(R.drawable.ic_party_mode_white_24dp, new View.OnClickListener() { @Override public void onClick(View view) { switchCamera(); } }); } @OnClick({R.id.camera_take, R.id.flash}) @Override public void onClick(View v) { switch (v.getId()) { case R.id.camera_take: takePhoto(); break; //闪光灯 case R.id.flash: if (mCameraId == 1) { //前置 Toast.makeText(mContext, "请切换为后置摄像头开启闪光灯", Toast.LENGTH_SHORT).show(); return; } Camera.Parameters parameters = mCamera.getParameters(); light_num = (light_num + 1) % 3; parameters.setFlashMode(FLASH_OPTIONS[light_num]); flash.setImageResource(FLASH_ICONS[light_num]); mCamera.setParameters(parameters); break; } } //前后相机切换 public void switchCamera() { releaseCamera(); mCameraId = (mCameraId + 1) % mCamera.getNumberOfCameras(); mCamera = getCamera(mCameraId); if (mHolder != null) { startPreview(mCamera, mHolder); } } @Override protected void onResume() { super.onResume(); if (mCamera == null) { mCamera = getCamera(mCameraId); if (mHolder != null) { startPreview(mCamera, mHolder); } } } @Override protected void onStop() { super.onStop(); releaseCamera(); } @Override protected void onDestroy() { super.onDestroy(); EventBus.getDefault().unregister(this); } //获取相机 private Camera getCamera(int id) { Camera camera = null; try { camera = Camera.open(id); } catch (Exception e) { } return camera; } //开始预览 private void startPreview(Camera camera, SurfaceHolder holder) { try { setCamera(camera); camera.setPreviewDisplay(holder); //亲测的一个方法 基本覆盖所有手机 将预览矫正 CameraUtil.getInstance().setCameraDisplayOrientation(this, mCameraId, camera); camera.startPreview(); isview = true; } catch (IOException e) { e.printStackTrace(); } } private void takePhoto() { if (isview) { switch (light_num) { case 0: //关闭 CameraUtil.getInstance().turnLightOff(mCamera); break; case 1: CameraUtil.getInstance().turnLightOn(mCamera); break; case 2: //自动 CameraUtil.getInstance().turnLightAuto(mCamera); break; } takePicture(); isview = false; } } private void takePicture() { mCamera.takePicture(null, null, new Camera.PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera camera) { BleLog.e("onPictureTaken:" + data.length); isview = false; Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); //旋转方向 Matrix matrix = new Matrix(); matrix.preRotate(90); if (mCameraId != 0) { matrix.preRotate(180); } Bitmap rotaBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); Bitmap bit = GetRoundedCornerBitmap(Bitmap.createScaledBitmap(rotaBitmap, cameraPhoto.getWidth(), cameraPhoto.getHeight(), true)); cameraPhoto.setImageBitmap(bit); final Bitmap saveBitmap = CameraUtil.getInstance().setTakePicktrueOrientation(mCameraId, bitmap); new Handler().post(new Runnable() { @Override public void run() { cameraPhoto.setUri(Util.savePic(mContext, saveBitmap)); } }); startPreview(mCamera, mHolder); } }); } //转圆角矩形 public Bitmap GetRoundedCornerBitmap(Bitmap bitmap) { try { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight())); final float roundPx = 15; paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(Color.BLACK); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); final Rect src = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); canvas.drawBitmap(bitmap, src, rect, paint); return output; } catch (Exception e) { return bitmap; } } //相机参数设置 private void setCamera(Camera camera) { Camera.Parameters parameters = camera.getParameters(); List<String> focusModes = parameters.getSupportedFocusModes(); if (focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) { // Autofocus mode is supported 自动对焦 parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO); } //这里第三个参数为最小尺寸 getPropPreviewSize方法会对从最小尺寸开始升序排列 取出所有支持尺寸的最小尺寸 Camera.Size previewSize = CameraUtil.getInstance().getPropSizeForHeight(parameters.getSupportedPreviewSizes(), screenWidth); parameters.setPreviewSize(previewSize.width, previewSize.height); Camera.Size pictrueSize = CameraUtil.getInstance().getPropSizeForHeight(parameters.getSupportedPictureSizes(), screenWidth); parameters.setPictureSize(pictrueSize.width, pictrueSize.height); camera.setParameters(parameters); /** * 设置surfaceView的尺寸 因为camera默认是横屏，所以取得支持尺寸也都是横屏的尺寸 * 我们在startPreview方法里面把它矫正了过来，但是这里我们设置设置surfaceView的尺寸的时候要注意 previewSize.height<previewSize.width * previewSize.width才是surfaceView的高度 * 一般相机都是屏幕的宽度 这里设置为屏幕宽度 高度自适应 你也可以设置自己想要的大小 */ picHeight = screenWidth * previewSize.width / previewSize.height; FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(screenWidth, picHeight); //这里当然可以设置拍照位置 比如居中 我这里就置顶了 //params.gravity = Gravity.CENTER; surfaceView.setLayoutParams(params); } //释放资源 private void releaseCamera() { if (mCamera != null) { mCamera.setPreviewCallback(null); mCamera.stopPreview(); mCamera.release(); mCamera = null; } } @Override public void surfaceCreated(SurfaceHolder holder) { startPreview(mCamera, holder); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { mCamera.stopPreview(); startPreview(mCamera, holder); } @Override public void surfaceDestroyed(SurfaceHolder holder) { releaseCamera(); } //接收到手环的拍照指令 @Subscribe(threadMode = ThreadMode.MAIN) public void getBleData(byte[] data) { if (data[0] == 0x07 && data[2] == 0x06) { takePhoto(); } }}public class CameraUtil { private static CameraUtil myCamPara = null; private CameraUtil() { } public static CameraUtil getInstance() { if (myCamPara == null) { myCamPara = new CameraUtil(); } return myCamPara; } //保证预览方向正确 public void setCameraDisplayOrientation(Activity activity, int cameraId, Camera camera) { Camera.CameraInfo info = new Camera.CameraInfo(); Camera.getCameraInfo(cameraId, info); int rotation = activity.getWindowManager().getDefaultDisplay().getRotation(); int degrees = 0; switch (rotation) { case Surface.ROTATION_0: degrees = 0; break; case Surface.ROTATION_90: degrees = 90; break; case Surface.ROTATION_180: degrees = 180; break; case Surface.ROTATION_270: degrees = 270; break; } int result; if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { result = (info.orientation + degrees) % 360; result = (360 - result) % 360; } else { result = (info.orientation - degrees + 360) % 360; } camera.setDisplayOrientation(result); } public Bitmap setTakePicktrueOrientation(int id, Bitmap bitmap) { Camera.CameraInfo info = new Camera.CameraInfo(); Camera.getCameraInfo(id, info); bitmap = rotaingImageView(id, info.orientation, bitmap); return bitmap; } /** * 把相机拍照返回照片转正 * @param angle 旋转角度 * @return bitmap 图片 */ public Bitmap rotaingImageView(int id, int angle, Bitmap bitmap) { //旋转图片 动作 Matrix matrix = new Matrix(); matrix.postRotate(angle); //加入翻转 把相机拍照返回照片转正 if (id == 1) { matrix.postScale(-1, 1); } // 创建新的图片 Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); return resizedBitmap; } /** * 获取所有支持的返回视频尺寸 */ public Size getPropSizeForHeight(List<Size> list, int minHeight) { Collections.sort(list, new CameraAscendSizeComparatorForHeight()); int i = 0; for (Size s : list) { if ((s.height >= minHeight)) { break; } i++; } if (i == list.size()) { i = 0;//如果没找到，就选最小的size } return list.get(i); } //升序 按照高度 public class CameraAscendSizeComparatorForHeight implements Comparator<Size> { public int compare(Size lhs, Size rhs) { if (lhs.height == rhs.height) { return 0; } else if (lhs.height > rhs.height) { return 1; } else { return -1; } } } //打开闪关灯 public void turnLightOn(Camera mCamera) { if (mCamera == null) { return; } Camera.Parameters parameters = mCamera.getParameters(); if (parameters == null) { return; } List<String> flashModes = parameters.getSupportedFlashModes(); if (flashModes == null) { return; } String flashMode = parameters.getFlashMode(); if (!Camera.Parameters.FLASH_MODE_ON.equals(flashMode)) { if (flashModes.contains(Camera.Parameters.FLASH_MODE_TORCH)) { parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); mCamera.setParameters(parameters); } } } //自动模式闪光灯 public void turnLightAuto(Camera mCamera) { if (mCamera == null) { return; } Camera.Parameters parameters = mCamera.getParameters(); if (parameters == null) { return; } List<String> flashModes = parameters.getSupportedFlashModes(); if (flashModes == null) { return; } String flashMode = parameters.getFlashMode(); if (!Camera.Parameters.FLASH_MODE_AUTO.equals(flashMode)) { if (flashModes.contains(Camera.Parameters.FLASH_MODE_TORCH)) { parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); mCamera.setParameters(parameters); } } } // 关闭闪光灯 public void turnLightOff(Camera mCamera) { if (mCamera == null) { return; } Camera.Parameters parameters = mCamera.getParameters(); if (parameters == null) { return; } List<String> flashModes = parameters.getSupportedFlashModes(); String flashMode = parameters.getFlashMode(); if (flashModes == null) { return; } if (!Camera.Parameters.FLASH_MODE_OFF.equals(flashMode)) { if (flashModes.contains(Camera.Parameters.FLASH_MODE_TORCH)) { parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); mCamera.setParameters(parameters); } } }} 0 0
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