Unity拉取手机相册——NativeGallery插件

——下载插件并导入Unity：https://download.csdn.net/download/LLLLL__/12238492

——如果是Android设备的话需要设置写权限到外部卡：PlayerSettings—Player—OtherSettings—Write Permission选择External(SDCard)

——代码实现点击按钮拉取手机相册

using UnityEngine;
using UnityEngine.UI;

public class Test : MonoBehaviour
{
    public RawImage headIcon;//头像

    public Button selectHeadIcon_btn;//选择头像按钮

    private void Awake()
    {
        selectHeadIcon_btn.GetComponent().onClick.AddListener(() => SelectHeadIconFromAlbum());
    }

    /// 

    /// 从手机相册选择头像
    /// 
    /// 
    public void SelectHeadIconFromAlbum(int maxSize = -1)
    {
        //调用插件自带接口，拉取相册，内部有区分平台
        NativeGallery.Permission permission = NativeGallery.GetImageFromGallery((path) =>
        {
            Debug.Log("Image path: " + path);
            if (path != null)
            {
                // 此Action为选取图片后的回调，返回一个Texture2D 
                Texture2D texture = NativeGallery.LoadImageAtPath(path, maxSize);
                if (texture == null)
                {
                    Debug.Log("Couldn't load texture from " + path);
                    return;
                }
                Debug.Log(texture.name);

                SetHeadIcon(texture);
            }
        }
        );
    }

    /// 

    /// 设置头像
    /// 
    private void SetHeadIcon(Texture2D texture)
    {
        headIcon.texture = texture;
    }
}

---

——Texture转字节数组
上传服务器时一般只能接受一个字节数组类型的文件，所以需要将图片转换为字节数组

    /// 

    /// Texture2D转换为二进制
    /// 
    /// 
    private byte[] TextureToByte(Texture2D _texture)
    {
        byte[] data = _texture.EncodeToPNG();
        return data;
    }