ImageViewer, share image with description. (#3012)

examples/imageviewer/shared/src/androidMain/kotlin/example/imageviewer/storage/AndroidImageStorage.kt

@@ -106,6 +106,9 @@ class AndroidImageStorage(
 
     @OptIn(ExperimentalResourceApi::class)
     suspend fun getUri(context: Context, picture: PictureData): Uri = withContext(Dispatchers.IO) {
+        if (!sharedImagesDir.exists()) {
+            sharedImagesDir.mkdirs()
+        }
         val tempFileToShare: File = sharedImagesDir.resolve("share_picture.jpg")
         when (picture) {
             is PictureData.Camera -> {
@@ -113,6 +116,9 @@ class AndroidImageStorage(
             }
 
             is PictureData.Resource -> {
+                if (!tempFileToShare.exists()) {
+                    tempFileToShare.createNewFile()
+                }
                 tempFileToShare.writeBytes(resource(picture.resource).readBytes())
             }
         }

examples/imageviewer/shared/src/androidMain/kotlin/example/imageviewer/view/ImageViewer.android.kt

@@ -57,6 +57,10 @@ private fun getDependencies(
                         Intent.EXTRA_STREAM,
                         imageStorage.getUri(context.androidContext, picture)
                     )
+                    putExtra(
+                        Intent.EXTRA_TEXT,
+                        picture.description
+                    )
                     type = "image/jpeg"
                     flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
                 }

examples/imageviewer/shared/src/iosMain/kotlin/example/imageviewer/ImageViewer.ios.kt

@@ -57,7 +57,10 @@ fun getDependencies(ioScope: CoroutineScope, toastState: MutableState<ToastState
                         val window = UIApplication.sharedApplication.windows.last() as? UIWindow
                         val currentViewController = window?.rootViewController
                         val activityViewController = UIActivityViewController(
-                            activityItems = listOf(UIImage(data = data)),
+                            activityItems = listOf(
+                                UIImage(data = data),
+                                picture.description
+                            ),
                             applicationActivities = null
                         )
                         currentViewController?.presentViewController(