Open Camera 是一个开源的 Android 手机和平板上的相机应用
特性包括：
- Option to auto-stabilise so your pictures are perfectly level no matter what
- Zoom via multi-touch gesture and single-touch control.
- Flash on/off/auto/torch.
- Choice of focus modes (including macro).
- Choice of front/back camera.
- Choose scene modes, color effects and white balance.
- Choice of camera resolution and JPEG image quality.
- Video recording (with optional audio).
- Timer option.
- Option to silence the shutter (requires Android 4.2).
- GUI works in any orientation without any pause when changing orientation. Option to optimise for left and right-handed users.
- Configurable volume keys (to take picture, or zoom).
- Choice of save location.
- On-screen display shows remaining device memory, and orientation angle of phone.
- Completely free and ad-free, unlike most Android apps.
-
网上这个文档应该相当多，早些年其实看文章简单的过了一下，并没有真正记住，但是再自己读着走遍流程并记录下，作为完整文档一部分。 安卓系统，各种Manager提供了系统层的控制接口，CameraManager也不例外，除去apk，那camera framework应该从CameraManager入口开始。 一般:CameraManager manager =（CameraManager）Context
-
openCamera CameraManager 文件路径：/frameworks/base/core/java/android/hardware/camera2/CameraManager.java 上层调用的API有两个，分别如下： @RequiresPermission(android.Manifest.permission.CAMERA) public void openCamera(@
-
错误log如下 05-13 09:22:38.192 W/System.err( 4471): android.hardware.camera2.CameraAccessException: CAMERA_DISABLED (1): connectHelper:1735: Camera "0" disabled by policy 05-13 09:22:38.192 W/System.err(
-
ubutun VIDEOIO(V4L2:/dev/video0): can’t open camera by index 使用命令行 ls /dev/vi* 查看usb摄像机，发现摄像机从原来的video0变成video2了，不知道在统信uos上usb摄像机的索引为何会变。