如何使用 android 10 及更高版本中的 Scoped Storage 从保存在外部存储中的文件名中获取 URI？

Question

在 SDK 29 之前，这是查找 Uri 的正确方法，但现在它不再适用于大于 28 的 sdk。假设我使用作用域存储保存 BITMAP，例如：

@RequiresApi(api = Build.VERSION_CODES.Q)
@NonNull
private Uri saveBitmap(@NonNull final Context context, @NonNull final Bitmap bitmap,
                       @NonNull final Bitmap.CompressFormat format, @NonNull final String mimeType,
                       @NonNull final String displayName, @Nullable final String subFolder) throws IOException {
    String relativeLocation = Environment.DIRECTORY_PICTURES;

    if (!TextUtils.isEmpty(subFolder)) {
        relativeLocation += File.separator + subFolder;
    }

    final ContentValues contentValues = new ContentValues();
    contentValues.put(MediaStore.MediaColumns.DISPLAY_NAME, displayName);
    contentValues.put(MediaStore.MediaColumns.MIME_TYPE, mimeType);
    contentValues.put(MediaStore.MediaColumns.RELATIVE_PATH, relativeLocation);

    final ContentResolver resolver = context.getContentResolver();

    OutputStream stream = null;
    Uri uri = null;

    try {
        final Uri contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        uri = resolver.insert(contentUri, contentValues);

        if (uri == null) {
            throw new IOException("Failed to create new MediaStore record.");
        }

        stream = resolver.openOutputStream(uri);

        if (stream == null) {
            throw new IOException("Failed to get output stream.");
        }

        if (!bitmap.compress(format, 95, stream)) {
            throw new IOException("Failed to save bitmap.");
        }

        return uri;
    } catch (IOException e) {
        if (uri != null) {
            // Don't leave an orphan entry in the MediaStore
            resolver.delete(uri, null, null);
        }

        throw e;
    } finally {
        if (stream != null) {
            stream.close();
        }
    }
}

此代码适用于 SDK <= 28。但是，对于 SDK 版本 29 及更高版本，如何使用保存在外部存储中的文件名获取 URI？

private String getFilePathUri(String enteredFileName) {

    String file_uri_string = Environment.getExternalStorageDirectory() + "/"
            + AppConstants.APP_FOLDER + "/" + enteredFileName + ".jpg";
    AppUtils.showLog(TAG, file_uri_string + "");
    return file_uri_string;

}

Answer 1

Android 10 岁及以上： 这里的 uri 给出 file_id 基于给定的显示名称。

/**
 * Returns the Uri which can be used to delete/work with images in the photo gallery.
 * @param displayName Path to IMAGE on SD card
 * @return Uri in the format of... content://media/external/images/media/[NUMBER]
 */
private Uri getUriFromPath(String displayName) {
    long photoId;
    Uri photoUri = MediaStore.Images.Media.getContentUri("external");

    String[] projection = {MediaStore.Images.ImageColumns._ID};
    // TODO This will break if we have no matching item in the MediaStore.
    Cursor cursor = getContentResolver().query(photoUri, projection, MediaStore.Images.ImageColumns.DISPLAY_NAME + " LIKE ?", new String[] { displayName }, null);
    assert cursor != null;
    cursor.moveToFirst();

    int columnIndex = cursor.getColumnIndex(projection[0]);
    photoId = cursor.getLong(columnIndex);

    cursor.close();
    return Uri.parse(photoUri.toString() + "/" + photoId);
}

如何使用 android 10 及更高版本中的 Scoped Storage 从保存在外部存储中的文件名中获取 URI？

How to get URI from filename which is saved in the external Storage using Scoped Storage in android 10 and above?

android

local-storage

android-external-storage

android-10.0

scoped-storage