Introduction A simple Android camera preview example; Reference https://www.polarxiong.com/archives/Android%E7%9B%B8%E6%9C%BA%E5%BC%80%E5%8F%91-%E4%B8%80-%E6%9C%80%E7%AE%80%E5%8D%95%E7%9A%84%E7%9B%B8%E6%9C%BA.html