Cursor class

This interface provides random read-write access to the result set returned by a database query.

Cursor implementations are not required to be synchronized so code using a Cursor from multiple threads should perform its own synchronization when using the Cursor.

See: https://developer.android.com/reference/android/database/Cursor

Implementers

Constructors

Cursor()

Properties

columnCount → int
The total number of columns. [...]
read-only
columnNames → List<String>
The names of all of the columns in the result set in the order in which they were listed in the result. [...]
read-only
count → int
The number of rows in the cursor. [...]
read-only
extras Bundle
A bundle of extra values. [...]
read-only
isAfterLast → bool
Returns whether the cursor is pointing to the position after the last row. [...]
read-only
isBeforeFirst → bool
Returns whether the cursor is pointing to the position before the first row. [...]
read-only
isClosed → bool
Returns true if the cursor is closed. [...]
read-only
isEmpty → bool
Returns true if there are no elements in this collection. [...]
read-only
isFirst → bool
Returns whether the cursor is pointing to the first row. [...]
read-only
isLast → bool
Returns whether the cursor is pointing to the last row. [...]
read-only
iterator → Iterator<Map<String, dynamic>>
An iterator over the rows of this cursor. [...]
read-only
length → int
Returns the number of elements in this. [...]
read-only
notificationUri → Uri
The URI at which notifications of changes in this cursor's data will be delivered. [...]
read-only
position → int
The current position of the cursor in the row set. [...]
read-only
first → Map<String, dynamic>
Returns the first element.
read-only, inherited
hashCode → int
The hash code for this object.
read-only, inherited
isNotEmpty → bool
Returns true if there is at least one element in this collection.
read-only, inherited
last → Map<String, dynamic>
Returns the last element.
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
single → Map<String, dynamic>
Checks that this iterable has only one element, and returns that element.
read-only, inherited

Methods

close() → Future<void>
Closes the cursor, releasing all of its resources and making it completely invalid. [...]
get(int columnIndex) → dynamic
Returns the value of the requested column.
getBlob(int columnIndex) → Uint8List
Returns the value of the requested column as a byte array. [...]
getColumnCount() → int
Returns the total number of columns. [...]
getColumnIndex(String columnName) → int
Returns the zero-based index for the given column name, or -1 if the column doesn't exist. [...]
getColumnName(int columnIndex) → String
Returns the column name at the given zero-based column index. [...]
getColumnNames() → List<String>
Returns a string array holding the names of all of the columns in the result set in the order in which they were listed in the result. [...]
getCount() → int
Returns the number of rows in the cursor. [...]
getDouble(int columnIndex) → double
Returns the value of the requested column as a double. [...]
getExtras() Bundle
Returns a bundle of extra values. [...]
getFloat(int columnIndex) → double
Returns the value of the requested column as a float. [...]
getInt(int columnIndex) → int
Returns the value of the requested column as an int. [...]
getLong(int columnIndex) → int
Returns the value of the requested column as a long. [...]
getNotificationUri() → Uri
Return the URI at which notifications of changes in this cursor's data will be delivered. [...]
getPosition() → int
Returns the current position of the cursor in the row set. [...]
getShort(int columnIndex) → int
Returns the value of the requested column as a short. [...]
getString(int columnIndex) → String
Returns the value of the requested column as a string. [...]
getType(int columnIndex) → int
Returns data type of the given column's value. [...]
isNull(int columnIndex) → bool
Returns true if the value in the indicated column is null. [...]
move(int offset) → bool
Moves the cursor by a relative amount, forward or backward, from the current position. [...]
moveToFirst() → bool
Moves the cursor to the first row. [...]
moveToLast() → bool
Moves the cursor to the last row. [...]
moveToNext() → bool
Moves the cursor to the next row. [...]
moveToPosition(int position) → bool
Moves the cursor to an absolute position. [...]
moveToPrevious() → bool
Moves the cursor to the previous row. [...]
any(bool test(E element)) → bool
Checks whether any element of this iterable satisfies test.
inherited
cast<R>() → Iterable<R>
Provides a view of this iterable as an iterable of R instances.
inherited
contains(Object element) → bool
Returns true if the collection contains an element equal to element.
inherited
elementAt(int index) → Map<String, dynamic>
Returns the indexth element.
inherited
every(bool test(E element)) → bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> f(E element)) → Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
firstWhere(bool test(E element), { Map<String, dynamic> orElse() }) → Map<String, dynamic>
Returns the first element that satisfies the given predicate test.
inherited
fold<T>(T initialValue, T combine(T previousValue, E element)) → T
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable<Map<String, dynamic>> other) → Iterable<Map<String, dynamic>>
Returns the lazy concatentation of this iterable and other.
inherited
forEach(void f(E element)) → void
Applies the function f to each element of this collection in iteration order.
inherited
join([String separator = "" ]) → String
Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(E element), { Map<String, dynamic> orElse() }) → Map<String, dynamic>
Returns the last element that satisfies the given predicate test.
inherited
map<T>(T f(E e)) → Iterable<T>
Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reduce(Map<String, dynamic> combine(E value, E element)) → Map<String, dynamic>
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
singleWhere(bool test(E element), { Map<String, dynamic> orElse() }) → Map<String, dynamic>
Returns the single element that satisfies test.
inherited
skip(int count) → Iterable<Map<String, dynamic>>
Returns an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(E value)) → Iterable<Map<String, dynamic>>
Returns an Iterable that skips leading elements while test is satisfied.
inherited
take(int count) → Iterable<Map<String, dynamic>>
Returns a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(E value)) → Iterable<Map<String, dynamic>>
Returns a lazy iterable of the leading elements satisfying test.
inherited
toList({bool growable: true }) → List<Map<String, dynamic>>
Creates a List containing the elements of this Iterable.
inherited
toSet() → Set<Map<String, dynamic>>
Creates a Set containing the same elements as this iterable.
inherited
toString() → String
Returns a string representation of (some of) the elements of this.
inherited
where(bool test(E element)) → Iterable<Map<String, dynamic>>
Returns a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<T>
Returns a new lazy Iterable with all elements that have type T.
inherited

Operators

operator ==(dynamic other) → bool
The equality operator.
inherited

Constants

FIELD_TYPE_BLOB → const int
Value returned by getType() if the specified column type is blob. [...]
4
FIELD_TYPE_FLOAT → const int
Value returned by getType() if the specified column type is float. [...]
2
FIELD_TYPE_INTEGER → const int
Value returned by getType() if the specified column type is integer. [...]
1
FIELD_TYPE_NULL → const int
Value returned by getType() if the specified column is null. [...]
0
FIELD_TYPE_STRING → const int
Value returned by getType() if the specified column type is string. [...]
3