Android 拍摄录制

叁歲伎倆 2022-01-12 00:07 264阅读 0赞

# \# Android 拍摄 录制 #

> Android 移动开发 拍摄照片 录制视频页面 分两大块 如果业务不是很复杂 对拍摄录制要求没有定制化 ps： 4：3 16：9 照片质量 720P 1080P 不需要实现自己的拍照逻辑 只要借助 Android 原生的 相机 实现拍照录像即可 如果实现定制化开发 ps：照片尺寸 质量 连拍？等 则需要自行开发

### \# 申请必要的权限 ###

> Android 6.0 以上 相机权限 录制权限 需要自行申请 这里不再讲明方法

<uses-feature android:name="android.hardware.camera" />
    	  <uses-feature android:name="android.hardware.camera.autofocus" />
    	  <uses-permission android:name="android.permission.CAMERA" />
          <uses-permission android:name="android.permission.RECORD_AUDIO" />
    	  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    	  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    复制代码

### \# 调用系统相机->拍摄照片 ###

try {
    					//检测相机 权限
                        CameraPermissionsUtils.checkCameraPermissions();
    					//设置拍摄照片保存位置
                        File file = getStorgeFile();
                        imgSavePath = file.getPath();
    				
                        Intent intentFromCapture = new Intent(
                                MediaStore.ACTION_IMAGE_CAPTURE);
    
    					 //添加这一句表示对目标应用临时授权该Uri所代表的文件
                        intentFromCapture.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                      
                        intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT,getUriForFile(getActivity(), file));
                        startActivityForResult(intentFromCapture,
                                FLAG_CAMERA);
               } catch (Exception e) {
                  ToastUtils.shortToastMessage(BaseApplication.getContext(), "请检查下您是否禁用了照相权限!");
    			  //执行申请 权限 代码 ...
               }
    
    		@Override
    	    public void onActivityResult(int requestCode, int resultCode, Intent data) {
    	        super.onActivityResult(requestCode, resultCode, data);
    	        if (resultCode == RESULT_OK) {
    	            switch (requestCode) {
    	                //相机拍摄
    	                case FLAG_CAMERA:
    	                    File file = new File(imgSavePath);
    						//裁剪 拍摄的照片
    	                    cropImageUri(getUriForFile(getActivity(), file), 800, 800, FLAG_CLIP, FLAG_CAMERA);
    	                    break;
    	            }
    	        }
    	    }
    复制代码

### \# 调用系统相机->录制视频 ###

static final int REQUEST_VIDEO_CAPTURE = 1;
    
    	private void dispatchTakeVideoIntent() {
    	    Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
    	    if (takeVideoIntent.resolveActivity(getPackageManager()) != null) {
    	        startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE);
    	    }
    	}
    	
    	@Override
    	protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    	    if (requestCode == REQUEST_VIDEO_CAPTURE && resultCode == RESULT_OK) {
    	        Uri videoUri = intent.getData();
    	        videoView.setVideoURI(videoUri);
    	    }
    	}
    复制代码

### \# 自定义拍摄 录制 ###

*  设置Camera 参数
 *  初始化 SurfaceView
 *  MediaRecorder 参数设置

#### \# 拍摄 录制流程图 ####

#### \# 设置相机参数 ####

> 预览比例 保存比例 本机是否支持 该比例？ 举个栗子：预览图片希望是4：3 拍照保存也是4：3 手机的屏幕却是 16：9 或者 18：9 如何设置？

*  按屏幕宽设置 预览View的高
 *  按照比例设置 预览View的宽高 screenHeight = screenWith/3\*4
 *  按照预览的比例去轮询 相机支持的参数 设置宽高比

/**
    	     * doStartPreview
    	     * @param holder
    	     * @param screenProp H/W
    	     */
    	    public void doStartPreview(SurfaceHolder holder, float screenProp) {
    	        if (isPreviewing) {
    	            LogUtil.i("doStartPreview isPreviewing");
    	        }
    	        if (this.screenProp < 0) {
    	            this.screenProp = screenProp;
    	        }
    	        if (holder == null) {
    	            return;
    	        }
    	        this.mHolder = holder;
    	        if (mCamera != null) {
    	            try {
    	                mParams = mCamera.getParameters();
    	
    	                mParams.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
    	                //闪关灯配置
    	                //自动模式，当光线较暗时自动打开闪光灯；
    	                mParams.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
    	                //对焦模式
    	                //自动模式
    	                mParams.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);
    	
    	              
    	                mParams = mCamera.getParameters();
    	                Camera.Size previewSize = CameraParamUtil.getInstance().getPreviewSize(mParams
    	                        .getSupportedPreviewSizes(), DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
    	                Camera.Size pictureSize = CameraParamUtil.getInstance().getPictureSize(mParams
    	                        .getSupportedPictureSizes(), DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
    	                mParams.setPreviewSize(previewSize.width, previewSize.height);
    	                preview_width = previewSize.width;
    	                preview_height = previewSize.height;
    	                mParams.setPictureSize(pictureSize.width, pictureSize.height);
    
    					//设置聚焦方式
    	                if (CameraParamUtil.getInstance().isSupportedFocusMode(
    	                        mParams.getSupportedFocusModes(), android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
    	                    mParams.setFocusMode(android.hardware.Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
    	                }
    					// 设置图片保存
    	                if (CameraParamUtil.getInstance().isSupportedPictureFormats(mParams.getSupportedPictureFormats(),
    	                        ImageFormat.JPEG)) {
    	                    mParams.setPictureFormat(ImageFormat.JPEG);
    	                    mParams.setJpegQuality(100);
    	                }
    	
    	                mCamera.setParameters(mParams);
    	                mParams = mCamera.getParameters();
    	                mCamera.setPreviewDisplay(holder);  //SurfaceView
    	                mCamera.setDisplayOrientation(cameraAngle);//浏览角度
    	                mCamera.setPreviewCallback(this); //每一帧回调
    	                mCamera.startPreview();//启动浏览
    	                isPreviewing = true;
    	                Log.i(TAG, "=== Start Preview ===");
    	            } catch (Exception e) {
    	                e.printStackTrace();
    	            }
    		        }
    		   	}
    
    - 按照比例 查询最优 尺寸
    			
    	     public Camera.Size getPreviewSize(List<Camera.Size> list, int th, float rate) {
    	        Collections.sort(list, sizeComparator);
    	        int i = 0;
    	        for (Camera.Size s : list) {
    	            if ((s.width > th) && equalRate(s, rate)) {
    	                Log.i(TAG, "MakeSure Preview :w = " + s.width + " h = " + s.height);
    	                break;
    	            }
    	            i++;
    	        }
    	        if (i == list.size()) {
    	            return getBestSize(list, rate);
    	        } else {
    	            return list.get(i);
    	        }
    	    }
    		
    		//排序
    		private class CameraSizeComparator implements Comparator<Camera.Size> {
           				 public int compare(Camera.Size lhs, Camera.Size rhs) {
    	            if (lhs.width == rhs.width) {
    	                return 0;
    	            } else if (lhs.width > rhs.width) {
    	                return 1;
    	            } else {
    	                return -1;
    	            }
    	        }
        	}
    
    		//换算 比例差别 
    		//如果差别 上下不超过 0.2 则为最佳尺寸	
    		private boolean equalRate(Camera.Size s, float rate) {
    		        float r = (float) (s.width) / (float) (s.height);
    		        return Math.abs(r - rate) <= 0.2;
    		 }
    复制代码

#### \# 拍照方法 很简单这里不再描述 ####

/**
         * Equivalent to <pre>takePicture(Shutter, raw, null, jpeg)</pre>.
         *
         * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback)
         */
        public final void takePicture(ShutterCallback shutter, PictureCallback raw,
                PictureCallback jpeg) {
            takePicture(shutter, raw, null, jpeg);
        }
    复制代码

### \# 录制 ###

#### \# 设置录制参数： ####

//启动录像
        public void startRecord(Surface surface, float screenProp, ErrorCallback callback) {
            mCamera.setPreviewCallback(null);
            final int nowAngle = (angle + 90) % 360;
            //获取第一帧图片
            Camera.Parameters parameters = mCamera.getParameters();
            int width = parameters.getPreviewSize().width;
            int height = parameters.getPreviewSize().height;
            YuvImage yuv = new YuvImage(firstFrame_data, parameters.getPreviewFormat(), width, height, null);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            yuv.compressToJpeg(new Rect(0, 0, width, height), 50, out);
            byte[] bytes = out.toByteArray();
            videoFirstFrame = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
            Matrix matrix = new Matrix();
            if (SELECTED_CAMERA == CAMERA_POST_POSITION) {
                matrix.setRotate(nowAngle);
            } else if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
                matrix.setRotate(270);
            }
            videoFirstFrame = createBitmap(videoFirstFrame, 0, 0, videoFirstFrame.getWidth(), videoFirstFrame
                    .getHeight(), matrix, true);
    
            if (isRecorder) {
                return;
            }
            if (mCamera == null) {
                openCamera(SELECTED_CAMERA);
            }
            if (mediaRecorder == null) {
                mediaRecorder = new MediaRecorder();
            }
            if (mParams == null) {
                mParams = mCamera.getParameters();
            }
            List<String> focusModes = mParams.getSupportedFocusModes();
            if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) {
                mParams.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
            }
            mCamera.setParameters(mParams);
            mCamera.unlock();
            mediaRecorder.reset();
            mediaRecorder.setCamera(mCamera);
            mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //视频采集来源
    
            mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    
            mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); //输出格式
            mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); //编码格式
            mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); //音频模式
    
    		//设置视频输出 尺寸比例
            Camera.Size videoSize;
            if (mParams.getSupportedVideoSizes() == null) {
                videoSize = CameraParamUtil.getInstance().getPreviewSize(mParams.getSupportedPreviewSizes(),
                        DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, screenProp);
            } else {
                //            videoSize = CameraParamUtil.getInstance().getPreviewSize(mParams.getSupportedVideoSizes(), 600,
                //                    screenProp);
                videoSize = CamParaUtil.getInstance().getOptimalSize(mParams.getSupportedVideoSizes(),
                        DisplayUtils.getScreenMetrics(BaseApp.getContext()).x, DisplayUtils.getScreenMetrics(BaseApp.getContext()).y);
            }
            Log.i(TAG, "setVideoSize    width = " + videoSize.width + "height = " + videoSize.height);
            if (videoSize.width == videoSize.height) {
                mediaRecorder.setVideoSize(preview_width, preview_height);
            } else {
                mediaRecorder.setVideoSize(videoSize.width, videoSize.height);
            }
    
            //        if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
         
            //            mediaRecorder.setOrientationHint(270);
            //        } else {
         
            //            mediaRecorder.setOrientationHint(nowAngle);
                        mediaRecorder.setOrientationHint(90);
            //        }
            if (SELECTED_CAMERA == CAMERA_FRONT_POSITION) {
                //手机预览倒立的处理
                if (cameraAngle == 270) {
                    //横屏
                    if (nowAngle == 0) {
                        mediaRecorder.setOrientationHint(180);
                    } else if (nowAngle == 270) {
                        mediaRecorder.setOrientationHint(270);
                    } else {
                        mediaRecorder.setOrientationHint(90);
                    }
                } else {
                    if (nowAngle == 90) {
                        mediaRecorder.setOrientationHint(270);
                    } else if (nowAngle == 270) {
                        mediaRecorder.setOrientationHint(90);
                    } else {
                        mediaRecorder.setOrientationHint(nowAngle);
                    }
                }
            } else {
                mediaRecorder.setOrientationHint(nowAngle);
            }
    
    
            //        if (DeviceUtil.isHuaWeiRongyao()) {
         
            //            mediaRecorder.setVideoEncodingBitRate(4 * 100000);
            //        } else {
         
            //            mediaRecorder.setVideoEncodingBitRate(mediaQuality);
            //        }
    		
    		//设置帧率
            mediaRecorder.setVideoFrameRate(24);
    		//设置比特率
            mediaRecorder.setVideoEncodingBitRate(mediaQuality);
            mediaRecorder.setPreviewDisplay(surface);
    		
    		//文件保存文位置 设置
            videoFileName = "video_" + System.currentTimeMillis() + ".mp4";
            if (saveVideoPath.equals("")) {
                saveVideoPath = Environment.getExternalStorageDirectory().getPath();
            }
            //        videoFileAbsPath = saveVideoPath + File.separator + videoFileName;
            videoFileAbsPath = FileUtil.initPath() + videoFileName;
            mediaRecorder.setOutputFile(videoFileAbsPath);
    
            try {
                mediaRecorder.prepare();
                mediaRecorder.start();
                isRecorder = true;
            } catch (IllegalStateException e) {
                e.printStackTrace();
                Log.i("CJT", "startRecord IllegalStateException");
                if (this.errorLisenter != null) {
                    this.errorLisenter.onError();
                }
            } catch (IOException e) {
                e.printStackTrace();
                Log.i("CJT", "startRecord IOException");
                if (this.errorLisenter != null) {
                    this.errorLisenter.onError();
                }
            } catch (RuntimeException e) {
                Log.i("CJT", "startRecord RuntimeException");
            }
        }
    
    	 //停止录像
        public void stopRecord(boolean isShort, StopRecordCallback callback) {
            if (!isRecorder) {
                return;
            }
            if (mediaRecorder != null) {
                mediaRecorder.setOnErrorListener(null);
                mediaRecorder.setOnInfoListener(null);
                mediaRecorder.setPreviewDisplay(null);
                try {
                    mediaRecorder.stop();
                } catch (RuntimeException e) {
                    e.printStackTrace();
                    mediaRecorder = null;
                    mediaRecorder = new MediaRecorder();
                } finally {
                    if (mediaRecorder != null) {
                        mediaRecorder.release();
                    }
                    mediaRecorder = null;
                    isRecorder = false;
                }
                if (isShort) {
                    if (FileUtil.deleteFile(videoFileAbsPath)) {
                        callback.recordResult(null, null);
                    }
                    return;
                }
                doStopPreview();
                String fileName = FileUtil.initPath() + videoFileName;
                callback.recordResult(fileName, videoFirstFrame);
            }
        }
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### \# surfceView 设置 ###

mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
        mHolder = mSurfaceView.getHolder();
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mHolder.addCallback(this);
    
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
    		//开启相机
            new Thread() {
                @Override
                public void run() {
                    CameraInterface.getInstance().doOpenCamera(CameraShootActivity.this);
                }
            }.start();
        }
    
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        }
    
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
    		//释放相机
            LogUtil.i("JCameraView SurfaceDestroyed");
            CameraInterface.getInstance().doDestroyCamera();
        }
    复制代码

### \# Activity 生命周期 ###

@Override
        protected void onResume() {
            super.onResume();
            CameraInterface.getInstance().registerSensorManager(this);
            if (screenProp > 1.4) {
                isSwitchRecording = true;
                CameraInterface.getInstance().doStopPreview();
                //如果当前屏占比 大于1.8 不是 16：9 采用 16:9设置 小于16:9 采用原先屏占比
                CameraInterface.getInstance().doStartPreview(mSurfaceView.getHolder(), DisplayUtils.getScreenRate(this) > 1.8
                        ? 16f / 9f : DisplayUtils.getScreenRate(this));
                screenProp = DisplayUtils.getScreenRate(this) > 1.8
                        ? 16f / 9f : DisplayUtils.getScreenRate(this);
                measureVideoSize();
            } else {
                isSwitchRecording = false;
                CameraInterface.getInstance().doStopPreview();
                screenProp = 4f / 3f;
                CameraInterface.getInstance().doStartPreview(mSurfaceView.getHolder(), 4f / 3f);
                measureCameraSize();
            }
        }
    	
    	 @Override
        protected void onPause() {
            super.onPause();
            CameraInterface.getInstance().isPreview(false);
            CameraInterface.getInstance().unregisterSensorManager(this);
            CameraInterface.getInstance().doStopPreview();
        }
    复制代码

转载于:https://juejin.im/post/5d006730e51d4510727c8079