Android 摄像头调用（不含拍照），Android面试基础知识

Camera.CameraInfo info = new Camera.CameraInfo();

Camera.getCameraInfo(cameraId,info);

//获得旋转角度

int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();

int degrees = 0;

switch (rotation) {

case Surface.ROTATION_0: //没有旋转

degrees = 0;

break;

case Surface.ROTATION_90: //旋转90°

degrees = 90;

break;

case Surface.ROTATION_180: //180

degrees = 180;

break;

case Surface.ROTATION_270:

degrees = 270;

break;

}

int result = 0;

if(info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT){

//前置摄像头旋转算法

result = (info.orientation + degrees) % 360;

result = (360 - result) % 360;

}else{

result = (info.orientation - degrees + 360) % 360;

}

ROTATE = result + 180;

camera.setDi