I want Like my facebook fan page Using Graph api .Please suggest me the way (with out opening browser) in unity 3d.

I am using prime31, via graphRequest i did not get solution.

@username

public void LikeUsButton()
{
	#if UNITY_ANDROID
	if(checkPackageAppIsPresent("com.facebook.katana"))
	{
		Application.OpenURL("fb://page/375158539307294"); //there is Facebook app installed so let's use it
	}
	else
	{
		Application.OpenURL("https://www.facebook.com/foxy.the.game"); // no Facebook app - use built-in web browser
	}
	#endif
}

#if UNITY_ANDROID
private bool checkPackageAppIsPresent(string package)
{
	AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
	AndroidJavaObject ca = up.GetStatic<AndroidJavaObject>("currentActivity");
	AndroidJavaObject packageManager = ca.Call<AndroidJavaObject>("getPackageManager");

	//take the list of all packages on the device
	AndroidJavaObject appList = packageManager.Call<AndroidJavaObject>("getInstalledPackages",0);
	int num = appList.Call<int>("size");
	for(int i = 0; i < num; i++)
	{
		AndroidJavaObject appInfo = appList.Call<AndroidJavaObject>("get", i);
		string packageNew = appInfo.Get<string>("packageName");
		if(packageNew.CompareTo(package) == 0)
		{
			return true;
		}
	}
	return false;
}
#endif,