android.database.MatrixCursor#setNotificationUri ( )源码实例Demo

@NonNull
private MatrixCursor getStickerPackInfo(@NonNull final Uri uri, @NonNull final List<StickerPack> stickerPackList) {
    final MatrixCursor cursor = new MatrixCursor(new String[] { STICKER_PACK_IDENTIFIER_IN_QUERY,
            STICKER_PACK_NAME_IN_QUERY, STICKER_PACK_PUBLISHER_IN_QUERY, STICKER_PACK_ICON_IN_QUERY,
            ANDROID_APP_DOWNLOAD_LINK_IN_QUERY, IOS_APP_DOWNLOAD_LINK_IN_QUERY, PUBLISHER_EMAIL, PUBLISHER_WEBSITE,
            PRIVACY_POLICY_WEBSITE, LICENSE_AGREEMENT_WEBSITE, IMAGE_DATA_VERSION, AVOID_CACHE, });

    for (final StickerPack stickerPack : stickerPackList) {
        final MatrixCursor.RowBuilder builder = cursor.newRow();
        builder.add(stickerPack.identifier);
        builder.add(stickerPack.name);
        builder.add(stickerPack.publisher);
        builder.add(stickerPack.trayImageFile);
        builder.add(stickerPack.androidPlayStoreLink);
        builder.add(stickerPack.iosAppStoreLink);
        builder.add(stickerPack.publisherEmail);
        builder.add(stickerPack.publisherWebsite);
        builder.add(stickerPack.privacyPolicyWebsite);
        builder.add(stickerPack.licenseAgreementWebsite);
        builder.add(stickerPack.imageDataVersion);
        builder.add(stickerPack.avoidCache ? 1 : 0);
    }

    cursor.setNotificationUri(Objects.requireNonNull(getContext()).getContentResolver(), uri);
    return cursor;
}
 

@NonNull
private MatrixCursor getStickersForAStickerPack(@NonNull final Uri uri) {
    final String identifier = uri.getLastPathSegment();
    final MatrixCursor cursor = new MatrixCursor(
            new String[] { STICKER_FILE_NAME_IN_QUERY, STICKER_FILE_EMOJI_IN_QUERY });

    for (final StickerPack stickerPack : getStickerPackList()) {
        if (identifier.equals(stickerPack.identifier)) {
            for (final Sticker sticker : stickerPack.getStickers()) {
                cursor.addRow(new Object[] { sticker.imageFileName, TextUtils.join(",", sticker.emojis) });
            }
        }
    }

    cursor.setNotificationUri(Objects.requireNonNull(getContext()).getContentResolver(), uri);
    return cursor;
}
 

@Override
public Cursor queryChildDocuments(String parentDocumentId, String[] projection, String sortOrder) {
    ensureServiceBound();
    List<Map<String, Serializable>> files;
    try {
        files = mService.loadFiles(parentDocumentId);
    } catch (RemoteException e) {
        return null;
    }
    final MatrixCursor result = new MatrixCursor(projection == null ? DEFAULT_DOCUMENT_PROJECTION : projection);
    // Allow receiving notification on create / delete
    result.setNotificationUri(getContext().getContentResolver(),
            DocumentsContract.buildDocumentUri(AUTHORITY, parentDocumentId));

    for (Map<String, Serializable> file : files) {
        includeFile(result, file);
    }
    return result;
}