[image_picker] Handle a null stream from openInputStream

packages/image_picker/image_picker_android/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.8.13+22
+
+* Fixes a crash when the content provider returns no stream for a picked
+  image; the pick now fails with `missing_valid_image_uri` instead.
+
 ## 0.8.13+21
 
 * Updates pigeon dev_dependency to ^27.3.2 for analyzer 14 compatibility.

packages/image_picker/image_picker_android/android/src/main/java/io/flutter/plugins/imagepicker/FileUtils.java

@@ -61,6 +61,13 @@ class FileUtils {
    */
   String getPathFromUri(final Context context, final Uri uri) {
     try (InputStream inputStream = context.getContentResolver().openInputStream(uri)) {
+      if (inputStream == null) {
+        // `ContentResolver#openInputStream()` returns null when the provider cannot serve the
+        // item (for example after the provider crashed, or for a cloud-only photo it could not
+        // fetch). Treat it like any other unreadable item: no path, so the caller reports
+        // `missing_valid_image_uri` instead of crashing on the null stream.
+        return null;
+      }
       String uuid = UUID.randomUUID().toString();
       File targetDirectory = new File(context.getCacheDir(), uuid);
       targetDirectory.mkdir();

packages/image_picker/image_picker_android/android/src/test/java/io/flutter/plugins/imagepicker/FileUtilTest.java

@@ -84,6 +84,23 @@ public void FileUtil_GetPathFromUri() throws IOException {
     assertEquals("imageStream", imageStream);
   }
 
+  @Test
+  public void FileUtil_GetPathFromUri_nullStream() throws IOException {
+    Uri uri = Uri.parse("content://dummy/dummy.png");
+
+    // `openInputStream` returns null when the provider cannot serve the item; this used to
+    // reach `copy()` and crash the plugin's executor thread with a NullPointerException.
+    ContentResolver mockContentResolver = mock(ContentResolver.class);
+    when(mockContentResolver.openInputStream(any(Uri.class))).thenReturn(null);
+
+    Context mockContext = mock(Context.class);
+    when(mockContext.getContentResolver()).thenReturn(mockContentResolver);
+
+    String path = fileUtils.getPathFromUri(mockContext, uri);
+
+    assertNull(path);
+  }
+
   @Test
   public void FileUtil_GetPathFromUri_securityException() throws IOException {
     Uri uri = Uri.parse("content://dummy/dummy.png");

packages/image_picker/image_picker_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: image_picker_android
 description: Android implementation of the image_picker plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/image_picker/image_picker_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+image_picker%22
-version: 0.8.13+21
+version: 0.8.13+22
 
 environment:
   sdk: ^3.12.0