[ Web Proxy ]

Viewing: https://developer.android.com/reference/android/net/http/HeaderBlock

HeaderBlock | API reference | Android Developers Skip to main content

[Android Developers]

Essentials Design & Plan Develop Google Play Blog

English
Deutsch
Espaol Amrica Latina
Franais
Indonesia
Polski
Portugus Brasil
Ting Vit

Android Studio

Stay organized with collections Save and categorize content based on your preferences.

Added in API level 34
Also in S Extensions 7

Summary: Ctors | Methods | Inherited Methods

HeaderBlock

Kotlin |Java

public abstract class HeaderBlock
extends Object

java.lang.Object
↳	android.net.http.HeaderBlock

Unmodifiable container of headers or trailers.

Summary

Public constructors
`HeaderBlock()`

Public methods
`abstract List<Entry<String, String>>`	`getAsList()` Returns an unmodifiable list of the header field and value pairs.
`abstract Map<String, List<String>>`	`getAsMap()` Returns an unmodifiable map from header field names to lists of values.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

HeaderBlock

Added in API level 34
Also in S Extensions 7

public HeaderBlock ()

Public methods

getAsList

Added in API level 34
Also in S Extensions 7

public abstract List<Entry<String, String>> getAsList ()

Returns an unmodifiable list of the header field and value pairs. For response, the headers are in the same order they are received over the wire. For request, the headers are in the same order they are added.

Returns
`List<Entry<String, String>>`	an unmodifiable list of header field and value pairs. This value cannot be `null`.

getAsMap

Added in API level 34
Also in S Extensions 7

public abstract Map<String, List<String>> getAsMap ()

Returns an unmodifiable map from header field names to lists of values. Order of each list of values for a single header field is: For response, the same order they were received over the wire. For request, the same order they were added. The iteration order of keys is unspecified.

Returns
`Map<String, List<String>>`	an unmodifiable map from header field names to lists of values. This value cannot be `null`.

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Last updated 2026-08-03 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-08-03 UTC."],[],[]]