解决android6.0打开摄像头权限"Failed to connect to camera service"的问题 ,动态获取权限

android6.0使用camera.open()时需要在onCreate()里面添加如下代码，否则会报错"Failed to connect to camera service"：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[] {Manifest.permission.CAMERA}, 1);
            }
        }

几行代码轻松搞定