Taking a picture from your camera to apply on a Material or sharing your best score with a screenshot of your game are certainly common features many developers want to handle quickly and easily.
MobileKit offers a clean and easy way to open native camera roll, image gallery and share features on iOS & Android devices.

AVAILABLE ON UNITY ASSET STORE

The plugin returns a bitmap file path back to Unity and the share functionality can send a message with a texture and opens a native dialog to choose the desired app according the platform.

HOW TO START

First, set your project for mobile build, iOS or Android.

ANDROID

In​ ​order​ ​to​ ​get​ ​the​ ​plugin​ ​compatible​ ​with​ ​all​ ​the​ ​Android​ ​versions​ ​since​ ​4.1,​ ​you​ ​will​ ​need​ ​to​ ​add  Google​ ​JAR/AAR​ ​Resolver​ ​to​ ​your​ ​project.​ ​To​ ​do​ ​that,​ ​you​ ​can​ ​download​ ​the​ ​corresponding  Unity​ ​package​ ​here:​ ​​https://github.com/googlesamples/unity-jar-resolver

Current​ ​Version:​ ​​Play-services-resolver-1.2.59.0.unitypackage

Once​ ​this​ ​package​ ​is​ ​installed​ ​in​ ​your​ ​project, be sure your Android settings looks like this, Assets/Play​ ​Services Resolver/Android​ ​Resolver/Settings :
(I don’t like to use Automatic Resolution… it can be quite slow sometimes)

Then, you’ll​ ​need​ ​to​ ​call​ ​the​ ​Resolve​ ​method,​ ​from  the​ ​menu:​ ​Assets/Play​ ​Services Resolver/Android​ ​Resolver/Resolve, here:

The​ ​Resolver​ ​will​ ​add​ ​the​ ​corresponding  dependencies​ ​from​ ​Android​ ​SDK​ ​to​ ​your project​ ​and​ ​you​ ​should​ ​see​ ​a​ ​new “Plugin/Android”​ ​folder with additional libs:

According your Android Build Tools & SDK version, you can change the SDK version of the dependencies in /MobileKit/Editor/MobileKitDependencies.xml (here 26.0.0) before doing a “Resolve”.

<?xml version="1.0" encoding="utf-8"?>
<dependencies>
  <androidPackages>
    <androidPackage spec="com.android.support:support-v4:26.0.0" />
  </androidPackages>
</dependencies>

iOS

The iOS library (MobileKit.a) is compiled for iOS 6.0 and above and is automatically packed when your XCode project is generated.

Sinde iOS 10, you must enter Usage Description for Camera and PhotoLibrary access.
You can do it partially under Player Settings or directly inside your info.plist under XCode.
Be sure these 2 entries are set in info.plist before compiling:

NSPhotoLibraryUsageDescription : “Your text”
NSCameraUsageDescription : “YourText”

DEMO SCENE

Open the demo scene, set your project for mobile build, Android or iOS, and press Build & Run.
Then take a look at MobileKitDemo.cs, it is quite easy to implement:

using UnityEngine;
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.IO;
using System;
using CornFlex;

public class MobileKitDemo : MonoBehaviour 
{
    public Button cameraButton;
    public Button galleryButton;
    public Button shareButton;
    public Toggle cropToggle;
    public Material cubeMaterial;    

    public Transform cube;

	void Start() 
    {
        cameraButton.onClick.AddListener(OnCameraButton);
        galleryButton.onClick.AddListener(OnGalleryButton);
        shareButton.onClick.AddListener(OnShareButton);

        MobileKit.Init();
	}

    // ******************************************************************************************
    // OPEN IMAGE PICKER
    // ******************************************************************************************
	
    void OnCameraButton()
    {
        MobileKitImageFormat format = cropToggle.isOn ? MobileKitImageFormat.Cropped : MobileKitImageFormat.Full;

        MobileKit.OpenImagePicker(MobileKitAction.Camera, format, OnImagePicked);
    }

    void OnGalleryButton()
    {
        MobileKitImageFormat format = cropToggle.isOn ? MobileKitImageFormat.Cropped : MobileKitImageFormat.Full;

        MobileKit.OpenImagePicker(MobileKitAction.Gallery, format, OnImagePicked);
    }

    void OnImagePicked(string filepath)
    {
        try
        {
            if (filepath.Contains("http://") || filepath.Contains("https://"))
            {
                StartCoroutine(LoadFromWWW(filepath));
            }
            else
            {
                Texture2D tex = new Texture2D(200, 200);
                tex.LoadImage(File.ReadAllBytes(filepath));
                cubeMaterial.mainTexture = tex;
            }

        }
        catch (Exception e)
        {
            Debug.Log(e.Message);
        }
    }

    IEnumerator LoadFromWWW(string url)
    {
        WWW imgreq = new WWW(url);

        yield return imgreq;

        Texture2D tex = new Texture2D(200, 200);
        imgreq.LoadImageIntoTexture(tex);
        cubeMaterial.mainTexture = tex;
    }

    // ******************************************************************************************
    // SHARE SCREENSHOT + MESSAGE
    // ******************************************************************************************

    void OnShareButton()
    {
        // share simple text message (with link)

        //MobileKit.Share("Share", "Check this out: https://www.quentinlengele.com");   

        // take screenshot and share it

        StartCoroutine(TakeScreenShot()); 
    }


    public IEnumerator TakeScreenShot()
    {
        yield return new WaitForEndOfFrame();

        Texture2D shot = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
        shot.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
        shot.Apply();

        byte[] bytes = shot.EncodeToJPG();

        string path = Application.persistentDataPath + "/Screenshot.jpg";

        File.WriteAllBytes(path, bytes);
         
        MobileKit.Share("Share", "Hello World!", path);    // share text message + image
    }



	void Update()
    {
        cube.Rotate(new Vector3(0.3f, 0.1f, 0.25f));
	}
}

SCREENSHOTS