Android删除相册得最近拍得一张图片

   private void deleteLatestPhoto() {
        String[] projection = new String[] { MediaStore.Images.ImageColumns._ID,
                MediaStore.Images.ImageColumns.DATE_TAKEN };
        Cursor cursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection,
                null, null, MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC");
        if (cursor != null) {
            cursor.moveToFirst();
            ContentResolver cr = mContext.getContentResolver();
            cr.delete(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                    BaseColumns._ID + "=" + cursor.getString(0), null);
        }
    }