MediaStore扫描 & 向MediaStore中插入文件记录

通知MediaStore扫描某个文件:
    private void scanSingleFile(String filePath) {
        if (filePath == null) {
            return;
        }
// broadcast to scan file
        boolean bmnt = Environment.getExternalStorageDirectory().getPath()
                .startsWith("/mnt");
        bmnt = mDownloadDestination
                .equalsIgnoreCase(UpDownloadUtils.DOWNLOAD_DEST_SDCARD) ? bmnt
                : false;
        File file = new File(bmnt ? ("/mnt" + filePath) : filePath);

        MediaScannerConnection.scanFile(mContext,
                new String[] { file.toString() }, null,
                new MediaScannerConnection.OnScanCompletedListener() {
                    @Override
                    public void onScanCompleted(String path, Uri uri) {
                    
                        ContentResolver cr = mContext.getContentResolver();
                        long datemodified = 0;
                        long dateadded = 0;
                        Cursor cursor = cr.query(uri, null, null, null, null);
                        if (cursor != null && cursor.moveToFirst()) {
                            datemodified = cursor.getLong(cursor
                                    .getColumnIndex(MediaStore.MediaColumns.DATE_MODIFIED));
                            dateadded = cursor.getLong(cursor
                                    .getColumnIndex(MediaStore.MediaColumns.DATE_ADDED));
                            cursor.close();
                        }

                        ContentValues values = new ContentValues();
                        if (datemodified > 0
                                && String.valueOf(datemodified).length() > 10) {
                            values.put(MediaStore.MediaColumns.DATE_MODIFIED,
                                    datemodified / 1000);
                        }
                        if (dateadded > 0
                                && String.valueOf(dateadded).length() > 13) {
                            values.put(MediaStore.MediaColumns.DATE_ADDED,
                                    dateadded / 1000);
                        }

                        if (values.size() > 0) {
                            cr.update(uri, values, null, null);
                        }
                    }
                });
    }

向MediaStore中插入文件记录

            ContentValues newValues = new ContentValues(6);
            String title = FileName.substring(0, pointIndex);
            newValues.put(MediaStore.Images.Media.TITLE,
                    FileName.substring(0, pointIndex));
            newValues.put(MediaStore.Images.Media.DISPLAY_NAME,
                    sourceFile.getName());
            newValues.put(MediaStore.Images.Media.DATA, sourceFile.getPath());
            newValues.put(MediaStore.Images.Media.DATE_MODIFIED,
                    System.currentTimeMillis() / 1000);
            newValues.put(MediaStore.Images.Media.SIZE, sourceFile.length());
            newValues.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
            uri = contentResolver.insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, newValues);