使用 Glide 显示保存到外部存储 MediaStore 中的图像

Question

在上次Android 11 update 之前，我曾经获取我的外部图像的文件路径以在 Glide 上显示它。由于上次更新，我现在需要使用 MediaStore 存储选项将我的图像存储在外部。我成功地保存了我的图像，但我在检索它并在滑行时显示它时遇到了问题。 我尝试使用来自this question 的代码来获取 uri：

public Uri getUriFromContentResolver(String fileName) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
             ContentResolver resolver = context.getApplicationContext().getContentResolver();

            Cursor queryCursor = resolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new String[]{MediaStore.Images.Media.DISPLAY_NAME,
                            MediaStore.Images.Media.RELATIVE_PATH}, MediaStore.Images.Media.DISPLAY_NAME + "=? ",
                    new String[]{fileName}, null);

            if (queryCursor != null && queryCursor.moveToFirst()) {

                return ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, queryCursor.getLong(0));
            } else {
                return null;
            }
        } else {
            return null;
        }
    }

并检索它以在滑行上显示它：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {

            Uri uriFromContentResolver = new ImageManager(context).getUriFromContentResolver(listPicture.get(pos).getFileName());

            if (uriFromContentResolver !=null) {
                System.out.println("Uri " + uriFromContentResolver.toString());

                Glide.with(context)
                        .load(uriFromContentResolver)
                        .placeholder(R.drawable.ic_baseline_person_24_black)
                        .into(pictureGallery);
            }

        } else {

            Glide.with(context)
                    .load(listPicture.get(pos).getPath())
                    .placeholder(R.drawable.ic_baseline_person_24_black)
                    .into(pictureGallery);
        }

当我使用这个保存文件时，我还测试了 glide 以从 uri.getPath() 加载路径：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                ContentResolver resolver = context.getContentResolver();
                ContentValues contentValues = new ContentValues();
                contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME, fileName);
                contentValues.put(MediaStore.MediaColumns.MIME_TYPE, "image/jpg");
                contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_PICTURES);
                Uri imageUri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);
                fos = resolver.openOutputStream(Objects.requireNonNull(imageUri));
               

                String path = imageUri.getPath();

我不习惯 MediaStore 系统，我会接受任何建议。谢谢。

Answer 1

我创建了一个类来通过文件名获取文件的Uri

Uri uriFromContentResolver = getUriFromContentResolver(fileName);

public Uri getUriFromContentResolver(String fileName) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            ContentResolver resolver = context.getApplicationContext().getContentResolver();

            Cursor queryCursor = resolver.query(
                    MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL),
                    new String[]{
                            MediaStore.Images.Media.DISPLAY_NAME,
                            MediaStore.Images.Media.RELATIVE_PATH},
                    MediaStore.Images.Media.DISPLAY_NAME + " = ?",
                    new String[]{fileName}, null);

            if (queryCursor != null && queryCursor.moveToFirst())
            {
                return ContentUris.withAppendedId(
                        MediaStore.Images.Media.getContentUri(
                                MediaStore.VOLUME_EXTERNAL),
                        queryCursor.getLong(0));
            } else
            {
                return null;
            }

        } else {
            return null;
        }
    }

一旦我们有了它，我们就用我们刚刚得到的路径调用这个函数

String path = getRealPathFromURI(uriFromContentResolver);

public String getRealPathFromURI(Uri contentUri) {
        String[] proj = { MediaStore.Images.Media.DATA };
        CursorLoader loader = new CursorLoader(context, contentUri, proj, null, null, null);
        Cursor cursor = loader.loadInBackground();
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String result = cursor.getString(column_index);
        cursor.close();
        return result;
    }

通过这个路径，Glide 可以读取文件

Glide.with(context)
         .load(path)
         .placeholder(R.drawable.ic_baseline_person_24_black)
         .into(pictureGallery);