Query
The Query class (and its subclass, DatabaseReference) are used for reading data. Listeners are attached, and they will be triggered when the corresponding data changes.
Instances of Query are obtained by calling startAt, endAt, or limit on a DatabaseReference.
Inheritors
Properties
The Android-SDK-shaped com.google.firebase.database.Query this wraps.
The data at this location and every change to it; the flow fails if the listener is cancelled.
Functions
The changes to the children of this location of the given types; the flow fails if the listener is cancelled.
Creates a query constrained to only return child nodes with a value less than or equal to the given value, using the given orderBy directive or priority as default.
Gets the server values for this query. Updates the cache and raises events if successful. If not connected, falls back to a locally-cached value or null.
Creates a query with limit and anchor it to the start of the window.
Creates a query with limit and anchor it to the end of the window.
Creates a query in which child nodes are ordered by the values of the specified path.
Creates a query in which child nodes are ordered by their keys.
Creates a query in which nodes are ordered by their value
Creates a query constrained to only return child nodes with a value greater than or equal to the given value, using the given orderBy directive or priority as default.