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Summary: Ctors | Methods | Inherited Methods | [Expand All]

Since: API Level 1

public class

SparseBooleanArray

extends Object
implements Cloneable

java.lang.Object
↳	android.util.SparseBooleanArray

Class Overview

SparseBooleanArrays map integers to booleans. Unlike a normal array of booleans there can be gaps in the indices. It is intended to be more efficient than using a HashMap to map Integers to Booleans.

Summary

Public Constructors
	SparseBooleanArray() Creates a new SparseBooleanArray containing no mappings.
	SparseBooleanArray(int initialCapacity) Creates a new SparseBooleanArray containing no mappings that will not require any additional memory allocation to store the specified number of mappings.

Public Methods
void	append(int key, boolean value) Puts a key/value pair into the array, optimizing for the case where the key is greater than all existing keys in the array.
void	clear() Removes all key-value mappings from this SparseBooleanArray.
SparseBooleanArray	clone() Creates and returns a copy of this `Object`.
void	delete(int key) Removes the mapping from the specified key, if there was any.
boolean	get(int key) Gets the boolean mapped from the specified key, or `false` if no such mapping has been made.
boolean	get(int key, boolean valueIfKeyNotFound) Gets the boolean mapped from the specified key, or the specified value if no such mapping has been made.
int	indexOfKey(int key) Returns the index for which `keyAt(int)` would return the specified key, or a negative number if the specified key is not mapped.
int	indexOfValue(boolean value) Returns an index for which `valueAt(int)` would return the specified key, or a negative number if no keys map to the specified value.
int	keyAt(int index) Given an index in the range `0...size()-1`, returns the key from the `index`th key-value mapping that this SparseBooleanArray stores.
void	put(int key, boolean value) Adds a mapping from the specified key to the specified value, replacing the previous mapping from the specified key if there was one.
int	size() Returns the number of key-value mappings that this SparseBooleanArray currently stores.
boolean	valueAt(int index) Given an index in the range `0...size()-1`, returns the value from the `index`th key-value mapping that this SparseBooleanArray stores.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public SparseBooleanArray ()

Since: API Level 1

Creates a new SparseBooleanArray containing no mappings.

public SparseBooleanArray (int initialCapacity)

Since: API Level 1

Creates a new SparseBooleanArray containing no mappings that will not require any additional memory allocation to store the specified number of mappings.

Public Methods

public void append (int key, boolean value)

Since: API Level 1

Puts a key/value pair into the array, optimizing for the case where the key is greater than all existing keys in the array.

public void clear ()

Since: API Level 1

Removes all key-value mappings from this SparseBooleanArray.

public SparseBooleanArray clone ()

Since: API Level 1

Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.

Returns

a copy of this object.

public void delete (int key)

Since: API Level 1

Removes the mapping from the specified key, if there was any.

public boolean get (int key)

Since: API Level 1

Gets the boolean mapped from the specified key, or false if no such mapping has been made.

public boolean get (int key, boolean valueIfKeyNotFound)

Since: API Level 1

Gets the boolean mapped from the specified key, or the specified value if no such mapping has been made.

public int indexOfKey (int key)

Since: API Level 1

Returns the index for which keyAt(int) would return the specified key, or a negative number if the specified key is not mapped.

public int indexOfValue (boolean value)

Since: API Level 1

Returns an index for which valueAt(int) would return the specified key, or a negative number if no keys map to the specified value. Beware that this is a linear search, unlike lookups by key, and that multiple keys can map to the same value and this will find only one of them.

public int keyAt (int index)

Since: API Level 1

Given an index in the range 0...size()-1, returns the key from the indexth key-value mapping that this SparseBooleanArray stores.

public void put (int key, boolean value)

Since: API Level 1

Adds a mapping from the specified key to the specified value, replacing the previous mapping from the specified key if there was one.

public int size ()

Since: API Level 1

Returns the number of key-value mappings that this SparseBooleanArray currently stores.

public boolean valueAt (int index)

Since: API Level 1

Given an index in the range 0...size()-1, returns the value from the indexth key-value mapping that this SparseBooleanArray stores.

Results

Interfaces

Classes

Enums

Exceptions

SparseBooleanArray

Class Overview

Summary

Public Constructors

public SparseBooleanArray ()

public SparseBooleanArray (int initialCapacity)

Public Methods

public void append (int key, boolean value)

public void clear ()

public SparseBooleanArray clone ()

Returns

public void delete (int key)

public boolean get (int key)

public boolean get (int key, boolean valueIfKeyNotFound)

public int indexOfKey (int key)

public int indexOfValue (boolean value)

public int keyAt (int index)

public void put (int key, boolean value)

public int size ()

public boolean valueAt (int index)