androidx.core.util

Kotlin |Java

Interfaces

Consumer	Compat version of `java.util.function.Consumer`
Pool	Interface for managing a pool of objects.
Predicate	Compat version of `java.util.function.Predicate`
Supplier	Compat version of `java.util.function.Supplier`

Classes

AtomicFile	Static library support version of the framework's `android.util.AtomicFile`, a helper class for performing atomic operations on a file by writing to a new file and renaming it into the place of the original file after the write has successfully completed.
ObjectsCompat	This class consists of static utility methods for operating on objects.
Pair	Container to ease passing around a tuple of two objects.
PatternsCompat	Commonly used regular expression patterns.
Pools	Helper class for creating pools of objects.

Top-level functions summary

LruCache<K, V>	`lruCache(maxSize: Int, crossinline sizeOf: (key: K, value: V) -> Int = { _, _ -> 1 }, crossinline create: (key: K) -> V? = { null as V? }, crossinline onEntryRemoved: (evicted: Boolean, key: K, oldValue: V, newValue: V?) -> Unit = { _, _, _, _ -> })` Creates an LruCache with the given parameters.
infix Range<T>	`T.rangeTo(that: T)` Creates a range from this Comparable value to that.

Extension functions summary

For android.util.AtomicFile
ByteArray	`AtomicFile.readBytes()` Gets the entire content of this file as a byte array.
String	`AtomicFile.readText(charset: Charset = Charsets.UTF_8)` Gets the entire content of this file as a String using UTF-8 or specified charset.
Unit	`AtomicFile.tryWrite(block: (out: FileOutputStream) -> Unit)` Perform the write operations inside block on this file.
Unit	`AtomicFile.writeBytes(array: ByteArray)` Sets the content of this file as an array of bytes.
Unit	`AtomicFile.writeText(text: String, charset: Charset = Charsets.UTF_8)` Sets the content of this file as text encoded using UTF-8 or specified charset.

For android.util.LongSparseArray
operator Boolean	`LongSparseArray<T>.contains(key: Long)` Returns true if the collection contains key.
Boolean	`LongSparseArray<T>.containsKey(key: Long)` Returns true if the collection contains key.
Boolean	`LongSparseArray<T>.containsValue(value: T)` Returns true if the collection contains value.
Unit	`LongSparseArray<T>.forEach(action: (key: Long, value: T) -> Unit)` Performs the given action for each key/value entry.
T	`LongSparseArray<T>.getOrDefault(key: Long, defaultValue: T)` Return the value corresponding to key, or defaultValue when not present.
T	`LongSparseArray<T>.getOrElse(key: Long, defaultValue: () -> T)` Return the value corresponding to key, or from defaultValue when not present.
Boolean	`LongSparseArray<T>.isEmpty()` Return true when the collection contains no elements.
Boolean	`LongSparseArray<T>.isNotEmpty()` Return true when the collection contains elements.