版权声明:歡迎转載 https://blog.csdn.net/jinjianghai/article/details/80068112
判断:如果没有相机权限,申请打开相机
if (!ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.CAMERA)){
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},0);
}