这是一个使用了camera2的工具，功能是：照相，录像 使用前需要权限请求。
dependencies { implementation 'com.github.zhaolongqing:camera2:1.0' }
allprojects { repositories { ... maven { url 'https://jitpack.io' } } }
//初始化 void initCamera(Activity activity, AutoFitTextureView autoFitTextureView, int cameraId);
//拍照 void takePicture(PictureFileListener pictureFileListener);
//开始摄像 void startRecord();
//快照 void snapPicture(Activity activity, AutoFitTextureView autoFitTextureView,PictureFileListener pictureFileListener);
//停止摄像 File stopRecord();
//快视频 void snapVideo(Activity activity, AutoFitTextureView autoFitTextureView);
//关闭照相机 void closeCamera();