[Solved] Loading Image From StreamingAssets

Hello World,

I seem to be unable to load images from StreamingAssets during runtime. Any ideas?

I was doing this in Resources and simply using Resources.Load(), but I want users to be able to customize the images they can use. Anyway to load an image from StreamingAssets???

Thanks,
Ed

 

https://docs.unity3d.com/ScriptReference/ImageConversion.LoadImage.html

 

Thanks for the reply! I'm unsure how to use that to get an image asset from file path.

This is what I have:

Code (CSharp):

1.     public Image myNameImage;
2.  
3.     string folderPath;
4.     string[] filePaths;
5.  
6.     int n;
7.  
8.     private void Awake()
9.     {
10.         ImageLoader();
11.     }
12.  
13.     void ImageLoader()
14.     {
15.         n = gameObject.GetComponent<ScoreButtonScript>().myNumber;  //For Choosing a file
16.  
17.         folderPath = Application.streamingAssetsPath + "/NameImages/GameNames/";  //Get path of folder
18.         filePaths = Directory.GetFiles(folderPath, "*.png"); // Get all files of type .png in this folder
19.  
20.         myNameImage.sprite = Resources.Load<Sprite>(filePaths[n]);  //This is what I need help with
21.  
22.         //Forexample, filePaths[n]= C:/Users/me/game/Assets/StreamingAssets/NameImages/GameNames/filename.png
23.     }

I understand Resources.Load() wont work with the StreamingAssets file path, but I don't understand how ImageConversion.LoadImage() can help me.



Cheers!
Ed

 

This method allows to convert a byte-array, that represents the data of a png file, into an Unity Texture2D object.

In order to load the file, or byte data, you can do:

Code (CSharp):

1. bytes[] pngBytes = System.IO.File.ReadAllBytes(path);

Then pass this data to ImageConversion.LoadImage:

Code (CSharp):

1. Texture2D tex = new Texture2D(2, 2);
2. tex.LoadImage(pngBytes);

Looking at the code you posted, it seems it's used for the UI. The Image Component expects a Sprite, but you can also use the "RawImage" Component which expects a Texture2D, so you don't have to create a Sprite at runtime for that Texture.

Hope it helps.

 

Thank you Peter for your time. My game is essentially done now that this works.

I am considering this solved and posting my script below

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using System.IO;
4.  
5. public class NameImageFinder : MonoBehaviour
6. {
7.     public Image myNameImage;
8.  
9.     string folderPath;
10.     string[] filePaths;
11.  
12.     int n;
13.  
14.     private void Awake()
15.     {
16.         //Designation for which file is to be loaded
17.         n = gameObject.GetComponent<ScoreButtonScript>().myNumber;
18.  
19.         ImageLoader();
20.     }
21.  
22.     void ImageLoader()
23.     {
24.         //Create an array of file paths from which to choose
25.         folderPath = Application.streamingAssetsPath + "/NameImages/GameNames/";  //Get path of folder
26.         filePaths = Directory.GetFiles(folderPath, "*.png"); // Get all files of type .png in this folder
27.  
28.         //Converts desired path into byte array
29.         byte[] pngBytes = System.IO.File.ReadAllBytes(filePaths[n]);
30.  
31.         //Creates texture and loads byte array data to create image
32.         Texture2D tex = new Texture2D(2, 2);
33.         tex.LoadImage(pngBytes);
34.  
35.         //Creates a new Sprite based on the Texture2D
36.         Sprite fromTex = Sprite.Create(tex, new Rect(0.0f, 0.0f, tex.width, tex.height), new Vector2(0.5f, 0.5f), 100.0f);
37.  
38.         //Assigns the UI sprite
39.         myNameImage.sprite = fromTex;
40.     }
41. }
42.  

Should I make the filePaths array in a parent object rather than in every instance of this script? Yes.
Will I? No.

Did I do this?

Also no, didn't really get how.

Does my code work? Yes.

 

My code. Yo can copy paste and will work. Just fill the inspector and magic happends

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. public class StreamingAssetsImageLoader : MonoBehaviour
5. {
6.     public Image[] m_EditableImages;
7.     public string[] m_ImagesNames;
8.  
9.  
10.     private void Awake()
11.     {
12.         if (m_EditableImages.Length == m_ImagesNames.Length) //Si es 0 dejamos las que estaban ya
13.         {
14.  
15.             LoadImages();
16.  
17.         }
18.         else {
19.             Debug.LogWarning("==Failed to load images==");
20.         }
21.  
22.     }
23.  
24.     private void LoadImages()
25.     {
26.  
27.         for (int i = 0; i < m_EditableImages.Length; i++)
28.         {
29.             if (m_EditableImages[i] != null)
30.             {
31.                 string path = GetImagePath(m_ImagesNames[i]);
32.                 m_EditableImages[i].sprite = GetSpritefromImage(path);
33.                 m_EditableImages[i].preserveAspect = true;
34.             }
35.             else {
36.                 Debug.LogWarning("Null references in EditableImages");
37.             }
38.         }
39.  
40.     }
41.  
42.     private string GetImagePath(string imgName) {
43.  
44.         //Create an array of file paths from which to choose
45.         string folderPath = Application.streamingAssetsPath + "/Imatges/";  //Get path of folder
46.         //string[] filePaths = Directory.GetFiles(folderPath, "*.png"); // Get all files of type .png in this folder
47.         string path = folderPath + imgName + ".png"; //han de ser formato png
48.  
49.         return path;
50.     }
51.  
52.     private Sprite GetSpritefromImage(string imgPath) {
53.  
54.         //Converts desired path into byte array
55.         byte[] pngBytes = System.IO.File.ReadAllBytes(imgPath);
56.  
57.         //Creates texture and loads byte array data to create image
58.         Texture2D tex = new Texture2D(2, 2);
59.         tex.LoadImage(pngBytes);
60.  
61.         //Creates a new Sprite based on the Texture2D
62.         Sprite fromTex = Sprite.Create(tex, new Rect(0.0f, 0.0f, tex.width, tex.height), new Vector2(0.5f, 0.5f), 100.0f);
63.  
64.         return fromTex;
65.  
66.     }
67.  
68. }

 

I don't understand. If they're just going to use normal IO, what are they going to do with a separate folder name?

 

I have to use streaming assets for loading the textures on 3d Model material and i have no idea to how to access them for android devices.
Any help!!

 

https://docs.unity3d.com/Manual/StreamingAssets.html

 

Solved this problem, load texture with streaming assets too !!