powerfun-unity/Assets/Scripts/Mobile/ImageSelectorController.cs

using System.Runtime.InteropServices;
using UnityEngine;
/// <summary>
/// 
/// </summary>
public class ImageSelectorController
{
    private AndroidJavaObject mainActivityObject = null;
#if UNITY_IOS
    [DllImport("__Internal")]
    private static extern void IOS_OpenCamera();
    [DllImport("__Internal")]
    private static extern void IOS_OpenAlbum();
#endif
    private static ImageSelectorController _instance;
    public static ImageSelectorController Instance
    {
        get
        {
#if !UNITY_EDITOR
            if (_instance == null)
            {
                _instance = new ImageSelectorController();
            }
#endif
            return _instance;
        }
    }
    private ImageSelectorController() 
    {
#if UNITY_ANDROID
        AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        mainActivityObject = jc.GetStatic<AndroidJavaObject>("currentActivity");
#elif UNITY_IOS
        //RegisterApp(_APP_ID);
#endif
    }
    
    public void Select() 
    {
#if UNITY_IOS
        IOS_OpenAlbum();
#else
        mainActivityObject.Call("Select");
#endif
    }
}