ANTM/Assets/UniClipboard/UniClipboard.cs

using UnityEngine;
using System.Runtime.InteropServices;

public class UniClipboard
{
    static IBoard _board;
    static IBoard board{
        get{
            if (_board == null) {
                #if UNITY_EDITOR
                _board = new EditorBoard();
                #elif UNITY_ANDROID
                _board = new AndroidBoard();
                #elif UNITY_IOS
                _board = new IOSBoard ();
                #endif
            }
            return _board;
        }
    }

    public static void SetText(string str){
        Debug.Log ("SetText");
        board.SetText (str);
    }

    public static string GetText(){
        return board.GetText ();
    }
}

interface IBoard{
    void SetText(string str);
    string GetText();
}

class EditorBoard : IBoard {
    public void SetText(string str){
        GUIUtility.systemCopyBuffer = str;
    }

    public string GetText(){
        return GUIUtility.systemCopyBuffer;
    }
}

#if UNITY_IOS
class IOSBoard : IBoard {
    [DllImport("__Internal")]
    static extern void SetText_ (string str);
    [DllImport("__Internal")]
    static extern string GetText_();

    public void SetText(string str){
        if (Application.platform != RuntimePlatform.OSXEditor) {
            SetText_ (str);
        }
    }

    public string GetText(){
        return GetText_();
    }
}
#endif

#if UNITY_ANDROID
class AndroidBoard : IBoard {

    AndroidJavaClass cb = new AndroidJavaClass("jp.ne.donuts.uniclipboard.Clipboard");

    public void SetText(string str){
        Debug.Log ("Set Text At AndroidBoard: " + str);
        cb.CallStatic ("setText", str);
    }

    public string GetText(){
        return cb.CallStatic<string> ("getText");
    }
}
#endif