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

public class

SparseIntArray

extends Object

java.lang.Object
↳	android.util.SparseIntArray

Class Overview

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

Summary

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

Public Methods
void	append(int key, int 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 SparseIntArray.
void	delete(int key) Removes the mapping from the specified key, if there was any.
int	get(int key, int valueIfKeyNotFound) Gets the int mapped from the specified key, or the specified value if no such mapping has been made.
int	get(int key) Gets the int mapped from the specified key, or `0` 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(int 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 SparseIntArray stores.
void	put(int key, int value) Adds a mapping from the specified key to the specified value, replacing the previous mapping from the specified key if there was one.
void	removeAt(int index) Removes the mapping at the given index.
int	size() Returns the number of key-value mappings that this SparseIntArray currently stores.
int	valueAt(int index) Given an index in the range `0...size()-1`, returns the value from the `index`th key-value mapping that this SparseIntArray 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() Is called before the object's memory is being reclaimed by the VM.
final Class<? extends Object>	getClass() Returns the unique instance of Class which 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(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.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.

Public Constructors

public SparseIntArray ()

Creates a new SparseIntArray containing no mappings.

public SparseIntArray (int initialCapacity)

Creates a new SparseIntArray 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, int 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.

public void clear ()

Removes all key-value mappings from this SparseIntArray.

public void delete (int key)

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

public int get (int key, int valueIfKeyNotFound)

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

public int get (int key)

Gets the int mapped from the specified key, or 0 if no such mapping has been made.

public 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.

public int indexOfValue (int 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. 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)

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

public void put (int key, int value)

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

public void removeAt (int index)

Removes the mapping at the given index.

public int size ()

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

public int valueAt (int index)

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

Interfaces

Classes

Enums

Exceptions