Android中判断是否有前置摄像头、后置摄像头的方法

private static boolean checkCameraFacing(final int facing) {
    if (getSdkVersion() < Build.VERSION_CODES.GINGERBREAD) {
        return false;
    }
    final int cameraCount = Camera.getNumberOfCameras();
    CameraInfo info = new CameraInfo();
    for (int i = 0; i < cameraCount; i++) {
        Camera.getCameraInfo(i, info);
        if (facing == info.facing) {
            return true;
        }
    }
    return false;
}

public static boolean hasBackFacingCamera() {
    final int CAMERA_FACING_BACK = 0;
    return checkCameraFacing(CAMERA_FACING_BACK);
}

public static boolean hasFrontFacingCamera() {
    final int CAMERA_FACING_BACK = 1;
    return checkCameraFacing(CAMERA_FACING_BACK);
}

public static int getSdkVersion() {
    return android.os.Build.VERSION.SDK_INT;
}