Saving Screenshots to Android Gallery

Here is the code that saves Texture2D to Android gallery and does not require to scan media afterwards (picture will appear in gallery instantly)

         private const string MediaStoreImagesMediaClass = "android.provider.MediaStore$Images$Media";

          public static string SaveImageToGallery(Texture2D texture2D, string title, string description)
          {
              using (var mediaClass = new AndroidJavaClass(MediaStoreImagesMediaClass))
              {
                  using (var cr = Activity.Call<AndroidJavaObject>("getContentResolver"))
                  {
                      var image = Texture2DToAndroidBitmap(texture2D);
                      var imageUrl = mediaClass.CallStatic<string>("insertImage", cr, image, title, description);
                      return imageUrl;
                  }
              }
          }
  
          public static AndroidJavaObject Texture2DToAndroidBitmap(Texture2D texture2D)
          {
              byte[] encoded = texture2D.EncodeToPNG();
              using (var bf = new AndroidJavaClass("android.graphics.BitmapFactory"))
              {
                  return bf.CallStatic<AndroidJavaObject>("decodeByteArray", encoded, 0, encoded.Length);
              }
          }

This GitHub repo contains functionality that will allow you to save screenshots and images to the gallery on Android and iOS:

https://github.com/ryanw3bb/unity-native-toolkit

I got a partial answer for the 'saving an image in the users gallery on Android' part of the question. That's how we do it in native Android. I will look for a solution from Unity.

 final Bitmap bitmap = INSERTSOMEVIEWHERE.getDrawingCache();
 final File appSzenesFolder;
 try {
     appSzenesFolder = directoryAndStorage.getOrCreatePictureDirectory("NameOfTheImageFolderInTheGallery");
     final Date now = new Date();
     final File file = new File(appSzenesFolder, (now.getTime() / 1000) + ".png");
     file.createNewFile();
 
     final FileOutputStream ostream = new FileOutputStream(file);
     bitmap.compress(CompressFormat.PNG, 100, ostream);
     ostream.close();
 
     // Tell the media scanner about the new file so that it is immediately available to the user.
     MediaScannerConnection.scanFile(this, new String[] { file.toString() }, null, null);
 } catch (IOException e) {
     // Insert error handling here :)
 }

This is pretty much copy and paste from one of our previous projects. I removed some of the error handling (you have to check for the existence of the folder etc).

INSERTSOMEVIEWHERE is some view in Android. This code is basically meant to take a screenshot from a particular view ans save it in the gallery. You can take the root view if you want to take a screenshot of the whole app.

There is that external helper function directoryAndStorage.getOrCreatePictureDirectory I use to create a folder in the users gallery depending on which device we are running on (Some devices don't have an external storage and the Nook does not have the function getExternalStoragePublicDirectory). The helper function is far from complete, you could add support for different Android versions aswell:

 public File getOrCreatePictureDirectory(String directoryName) {
     final File picturesDir;
     if (Build.PRODUCT.equals("NOOKcolor")) {
         // The nook color uses a slightly different path for images and the
         // usual constant for the path does not work
         picturesDir = new File("/mnt/media");
     } else if (Build.PRODUCT.equals("NOOKTablet")) {
         picturesDir = new File("/mnt/media");
     } else {
         picturesDir = Environment
                 .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
     }
     picturesDir.mkdirs();
     File dir = new File(picturesDir, directoryName);
     if (!dir.exists()) {
         Log.i(Config.LOG_TOKEN, "'" + dir
                 + "' does not exist, trying to create ...");
         if (dir.mkdirs() == false) {
             Log.e(Config.LOG_TOKEN, "Failed to create directory '" + dir
                     + "'!");
             return null;
         }
     }
     return dir;
 }

That's it so far. If you have questions, shoot. I'm going to post updates soon.

Use this code work for me

IEnumerator ScreenshotEncode() {

     yield return new WaitForEndOfFrame();
     texture1 = new Texture2D(Screen.width-(int)Left_P.y, Screen.height, TextureFormat.RGB24, false);
     texture1.ReadPixels(new Rect(0+Left_P.y, 0, Screen.width-Left_P.y, Screen.height), 0, 0);
     texture1.Apply();
     for(int i =0 ; i< hiders.Length;i++)
         hiders[i].SetActive(true);
     yield return 0;
       bytes = texture1.EncodeToPNG();

File.WriteAllBytes( "/mnt/sdcard/DCIM/Images/" + "DrawCircuit " +save_Address+".jpg",bytes ); }}