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NotifyChange with changed uri from contentProvider.update ()

i implemented update()from ContentProviderand notified the observer usinggetContext().getContentResolver().notifyChange(uri, null);

My obvious need is that whenever only one line is executed, I want to notify using uri with specific lines, but could not find a way to do this. an additional request, for example "select id where selectionArgs", can do this, but it will be stupid.

onchange(boolean, uri)to get the full uri instead of a specific string, it’s easy to understand that this is because it ContentProvider.update()sends the same thing.

some code for more clarity

update () method MyContentProvider

 @Override
    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {

        Log.d("TAG", "update " + uri.getPath());

        int count = 0;
        switch (uriMatcher.match(uri)) {
        case BOOKS:
            count = booksDB.update(DATABASE_TABLE, values, selection, selectionArgs);
            break;
        case BOOK_ID:
            count = booksDB.update(DATABASE_TABLE, values,
                    _ID + " = " + uri.getPathSegments().get(1)
                            + (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""),
                    selectionArgs);
            break;
        default:
            throw new IllegalArgumentException("Unknown URI " + uri);
        }

        if (count == 1) {
            Cursor c = query(uri, new String[] { _ID }, selection, selectionArgs, null);
            long rowId = Long.valueOf(c.getString(c.getColumnIndex(_ID)));
            uri = ContentUris.withAppendedId(CONTENT_URI, rowId);
        }
        getContext().getContentResolver().notifyChange(uri, null);
        return count;

    }

I am updating the table somehow like

getContentResolver().update(MyContentProvider.CONTENT_URI, values1, MyContentProvider._ID+"<?", new String[]{"3"}));

frankly, the code is hardly related to the question, just trying to give you some context

+5
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3

uri id

@Override
public Uri insert(Uri uri, ContentValues values) {
    Log.i(TAG, "insert " + uri);
    final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
    final int match = URI_MATCHER.match(uri);

    Uri returnUri;
    switch (match) {
        case MESSAGE: {
            long _id = db.insert(MessageContract.MessageEntry.TABLE_NAME, null, values);
            if (_id > 0)
                returnUri = ContentUris.withAppendedId(MessageContract.MessageEntry.CONTENT_URI, _id);
            else
                throw new android.database.SQLException("Failed to insert row into " + uri);
            break;
        }

        default:
            throw new UnsupportedOperationException("Unknown uri: " + uri);
    }

    getContext().getContentResolver().notifyChange(returnUri, null);


    return returnUri;
}

.

getContentResolver().registerContentObserver(MessageContract.MessageEntry.CONTENT_URI, true, mContentObserver);

Uri, ContentUris.parseId(uri)

+8

, ( , ), , ( )

  • ContentValues - , notifyChange();
  • Uri ( , Uri). , Uri, , , (, , , . , , , ). , Uri, (Uri) (), ;
+1

You can pass the identifier through ContentValues ​​and add it to the notification URL. This way you do not need to make a separate request.

@Override
public int update(@NonNull Uri uri, ContentValues values, String selection, String[] selectionArgs) {
    int rows = _database.update(getTableName(), values, selection, selectionArgs);
    if (rows > 0) {
        Uri itemUri = ContentUris.withAppendedId(uri, values.getAsLong(DatabaseModel.COLUMN_ID)); // DatabaseModel.COLUMN_ID is "_id"

        getContext().getContentResolver().notifyChange(itemUri, null);
    }
    return rows;
}
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