using System.IO;

//获取系统时间并命名相片名
System.DateTime now = System.DateTime.Now;
string times = now.ToString ();
times = times.Trim ();
times = times.Replace ("/","-");
//文件名
string filename = "Screenshot"+times+".png";
//判断是否为Android平台
if (Application.platform == RuntimePlatform.Android) {

//截取屏幕
Texture2D texture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
texture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
texture.Apply();
//转为字节数组
byte[] bytes = texture.EncodeToPNG();

string destination = "/sdcard/DCIM/ARphoto";
//判断目录是否存在，不存在则会创建目录
if (!Directory.Exists (destination)) {
Directory.CreateDirectory (destination);
}
//文件路径
string Path_save = destination+"/" + filename;
//存图片
System.IO.File.WriteAllBytes(Path_save, bytes);
}

unity发布安卓 截图保存到本地