Android 获得可用摄像头id

int cameraId = -1;
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i <= numberOfCameras; i++) {
    Camera.CameraInfo info = new Camera.CameraInfo();
    Camera.getCameraInfo(i, info);
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        cameraId = i;
        break;
    }
}
mCamera = Camera.open(cameraId);

 

这样就可以查找有几个摄像头可用