我怎样才能得到正面采用新型摄像机2图书馆面临的相机ID？我不能在任何地方的文件找到它。

How can I get id of front facing camera using new Camera2 library? I can't find it anywhere in documentation.

推荐答案

我已经找到解决方案，我可以通过调用 getCameraCharacteristics（c​​ameraId）获得相机的特点; 在 CameraManager 对象。

I have found solution, i could get camera characteristics by calling getCameraCharacteristics(cameraId); on CameraManager object.

String getFrontFacingCameraId(CameraManager cManager){
    for(final String cameraId : cManager.getCameraIdList()){
        CameraCharacteristics characteristics = cManager.getCameraCharacteristics(cameraId);
        int cOrientation = characteristics.get(CameraCharacteristics.LENS_FACING);
        if(cOrientation == CameraCharacteristics.LENS_FACING_FRONT) return cameraId;
    }
    return null;
}