[image_picker] Implemented 2860 and added Unit Test to test functionality (flutter#3685)

Author: danielroek

packages/image_picker/image_picker/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.7.2+1
+
+* Android: fixes an issue where videos could be wrongly picked with `.jpg` extension.
+
 ## 0.7.2
 
 * Run CocoaPods iOS tests in RunnerUITests target

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

@@ -23,8 +23,10 @@
 
 package io.flutter.plugins.imagepicker;
 
+import android.content.ContentResolver;
 import android.content.Context;
 import android.net.Uri;
+import android.webkit.MimeTypeMap;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -39,7 +41,7 @@ String getPathFromUri(final Context context, final Uri uri) {
     OutputStream outputStream = null;
     boolean success = false;
     try {
-      String extension = getImageExtension(uri);
+      String extension = getImageExtension(context, uri);
       inputStream = context.getContentResolver().openInputStream(uri);
       file = File.createTempFile("image_picker", extension, context.getCacheDir());
       file.deleteOnExit();
@@ -67,13 +69,18 @@ String getPathFromUri(final Context context, final Uri uri) {
   }
 
   /** @return extension of image with dot, or default .jpg if it none. */
-  private static String getImageExtension(Uri uriImage) {
+  private static String getImageExtension(Context context, Uri uriImage) {
     String extension = null;
 
     try {
       String imagePath = uriImage.getPath();
-      if (imagePath != null && imagePath.lastIndexOf(".") != -1) {
-        extension = imagePath.substring(imagePath.lastIndexOf(".") + 1);
+      if (uriImage.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
+        final MimeTypeMap mime = MimeTypeMap.getSingleton();
+        extension = mime.getExtensionFromMimeType(context.getContentResolver().getType(uriImage));
+      } else {
+        extension =
+            MimeTypeMap.getFileExtensionFromUrl(
+                Uri.fromFile(new File(uriImage.getPath())).toString());
       }
     } catch (Exception e) {
       extension = null;

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

@@ -54,4 +54,13 @@ public void FileUtil_GetPathFromUri() throws IOException {
     String imageStream = new String(bytes, UTF_8);
     assertTrue(imageStream.equals("imageStream"));
   }
+
+  @Test
+  public void FileUtil_getImageExtension() throws IOException {
+    Uri uri = Uri.parse("content://dummy/dummy.png");
+    shadowContentResolver.registerInputStream(
+        uri, new ByteArrayInputStream("imageStream".getBytes(UTF_8)));
+    String path = fileUtils.getPathFromUri(context, uri);
+    assertTrue(path.endsWith(".jpg"));
+  }
 }

packages/image_picker/image_picker/pubspec.yaml

@@ -2,7 +2,7 @@ name: image_picker
 description: Flutter plugin for selecting images from the Android and iOS image
   library, and taking new pictures with the camera.
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker
-version: 0.7.2
+version: 0.7.2+1
 
 flutter:
   plugin: